---
_id: '64798'
abstract:
- lang: eng
text: "Lead-containing piezoelectric ceramics are still the base for today’s ultrasonic
transducers used in broad applications. This is partly due to missing powerful
lead-free piezoelectric ceramic parts in the commercial market. There has been
much research on lead-free materials but developing them into marketable parts
seems to be an ongoing process. The actual exemption of ROHS has expired, but
as the new exemption has already been requested, ceramic suppliers keep on selling
lead containing products. Nevertheless, these should be replaced by lead-free
alternatives for environmental and health issues. \r\nThis contribution focuses
on exploring the technological readiness level of lead-free hard piezoceramics
for prestressed ultrasonic transducers. A small series of bolted Langevin transducers
was set up with standard PZT material and three commercial lead-free variants.
Results of the building process from individual ring ceramic characteristics to
transducer load tests are presented. The main finding of this study is that the
lead-free materials technically can compete with the standard PZT for medium-power
applications. Some adaptations in the ultrasonic system must be done: the geometry
must be altered to fit resonance frequency, and higher voltages or thinner ceramics
are needed to achieve the same vibration level at low load. For reaching same
power, the volume of lead-free ceramics must be 1.5 to 3 times larger. As already
promoted in literature, mechanical losses at high vibration levels are smaller
for the lead-free materials. This might help to argument lead-free piezoelectric
materials in some applications.\r\n\r\nReferences\r\n1.\tDirective 2011/65/EU
of the European Parliament and of the Council of 8 June 2011 on the Restriction
of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment.
EUR-Lex Document 02011L0065-20240801. Available online: http://data.europa.eu/eli/dir/2011/65/2024-08-01
(accessed on 24 January 2025).\r\n2.\tLangevin, P. (1918) Method and Apparatus
for Transmitting and Receiving Submarine Elastic Waves Using the Piezoelectric
Properties of Quartz. French Patent Office; Patent No. FR505703.\r\n3.\tHemsel,
T.; Twiefel, J. (2023) Piezoelectric Ultrasonic Power Transducers. In Encyclopedia
of Materials: Electronics; Academic Press: Oxford, UK; pp. 276–285. https://doi.org/10.1016/b978-0-12-819728-8.00047-4.\r\n4.\tATHENA
Technologie Beratung GmbH (2025) Description of Ultrasound Generator. Available
online: http://shop.myathena.de/epages/12074748.sf/de_DE/?ObjectPath=/Shops/12074748/Products/AM200
(accessed on 13 January 2025).\r\n5.\tLittmann, W.; Hemsel, T.; Kauczor, C.; Wallaschek,
J.; Sinha, W. (2003) Load-adaptive phase-controller for resonant driven piezoelectric
devices. Proc. World Congr. Ultrason. 2003, 48, 547–550.\r\n6.\tScheidemann, C.,
Bornmann, P., Littmann, W., & Hemsel, T. (2025). Lead-Free Ceramics in Prestressed
Ultrasonic Transducers. Actuators, 14(2), 55. https://doi.org/10.3390/act14020055\r\n"
author:
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Walter
full_name: Littmann, Walter
last_name: Littmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
citation:
ama: 'Scheidemann C, Bornmann P, Littmann W, Hemsel T. Bolted Langevin transducers
with leadfree piezoelectric ceramics. In: ; 2025.'
apa: Scheidemann, C., Bornmann, P., Littmann, W., & Hemsel, T. (2025). Bolted
Langevin transducers with leadfree piezoelectric ceramics. International Workshop
on Piezoelectric Materials and Applications in Actuators (IWPMA), Vilnius, Lithuania.
bibtex: '@inproceedings{Scheidemann_Bornmann_Littmann_Hemsel_2025, title={Bolted
Langevin transducers with leadfree piezoelectric ceramics}, author={Scheidemann,
Claus and Bornmann, Peter and Littmann, Walter and Hemsel, Tobias}, year={2025}
}'
chicago: Scheidemann, Claus, Peter Bornmann, Walter Littmann, and Tobias Hemsel.
“Bolted Langevin Transducers with Leadfree Piezoelectric Ceramics,” 2025.
ieee: C. Scheidemann, P. Bornmann, W. Littmann, and T. Hemsel, “Bolted Langevin
transducers with leadfree piezoelectric ceramics,” presented at the International
Workshop on Piezoelectric Materials and Applications in Actuators (IWPMA), Vilnius,
Lithuania, 2025.
mla: Scheidemann, Claus, et al. Bolted Langevin Transducers with Leadfree Piezoelectric
Ceramics. 2025.
short: 'C. Scheidemann, P. Bornmann, W. Littmann, T. Hemsel, in: 2025.'
conference:
end_date: 2025-07-03
location: Vilnius, Lithuania
name: International Workshop on Piezoelectric Materials and Applications in Actuators
(IWPMA)
start_date: 2025-07-01
date_created: 2026-03-02T10:39:40Z
date_updated: 2026-03-02T11:04:56Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: open_access
content_type: application/pdf
creator: hemsel
date_created: 2026-03-02T10:37:46Z
date_updated: 2026-03-02T11:00:37Z
file_id: '64799'
file_name: IWPMA_2025_Hemsel.pdf
file_size: 1812289
relation: main_file
file_date_updated: 2026-03-02T11:00:37Z
has_accepted_license: '1'
keyword:
- lead free piezoelectric ceramics
- bolted Langevin transducer
- medium power ultrasound.
language:
- iso: eng
oa: '1'
status: public
title: Bolted Langevin transducers with leadfree piezoelectric ceramics
type: conference
user_id: '210'
year: '2025'
...
---
_id: '51518'
abstract:
- lang: eng
text: In applications of piezoelectric actuators and sensors, the dependability
and particularly the reliability throughout their lifetime are vital to manufacturers
and end-users and are enabled through condition-monitoring approaches. Existing
approaches often utilize impedance measurements over a range of frequencies or
velocity measurements and require additional equipment or sensors, such as a laser
Doppler vibrometer. Furthermore, the non-negligible effects of varying operating
conditions are often unconsidered. To minimize the need for additional sensors
while maintaining the dependability of piezoelectric bending actuators irrespective
of varying operating conditions, an online diagnostics approach is proposed. To
this end, time- and frequency-domain features are extracted from monitored current
signals to reflect hairline crack development in bending actuators. For validation
of applicability, the presented analysis method was evaluated on piezoelectric
bending actuators subjected to accelerated lifetime tests at varying voltage amplitudes
and under external damping conditions. In the presence of a crack and due to a
diminished stiffness, the resonance frequency decreases and the root-mean-square
amplitude of the current signal simultaneously abruptly drops during the lifetime
tests. Furthermore, the piezoelectric crack surfaces clapping is reflected in
higher harmonics of the current signal. Thus, time-domain features and harmonics
of the current signals are sufficient to diagnose hairline cracks in the actuators.
article_number: '521'
article_type: original
author:
- first_name: Osarenren Kennedy
full_name: Aimiyekagbon, Osarenren Kennedy
id: '9557'
last_name: Aimiyekagbon
- first_name: Amelie
full_name: Bender, Amelie
id: '54290'
last_name: Bender
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: Aimiyekagbon OK, Bender A, Hemsel T, Sextro W. Diagnostics of Piezoelectric
Bending Actuators Subjected to Varying Operating Conditions. Electronics.
2024;13(3). doi:10.3390/electronics13030521
apa: Aimiyekagbon, O. K., Bender, A., Hemsel, T., & Sextro, W. (2024). Diagnostics
of Piezoelectric Bending Actuators Subjected to Varying Operating Conditions.
Electronics, 13(3), Article 521. https://doi.org/10.3390/electronics13030521
bibtex: '@article{Aimiyekagbon_Bender_Hemsel_Sextro_2024, title={Diagnostics of
Piezoelectric Bending Actuators Subjected to Varying Operating Conditions}, volume={13},
DOI={10.3390/electronics13030521},
number={3521}, journal={Electronics}, publisher={MDPI AG}, author={Aimiyekagbon,
Osarenren Kennedy and Bender, Amelie and Hemsel, Tobias and Sextro, Walter}, year={2024}
}'
chicago: Aimiyekagbon, Osarenren Kennedy, Amelie Bender, Tobias Hemsel, and Walter
Sextro. “Diagnostics of Piezoelectric Bending Actuators Subjected to Varying Operating
Conditions.” Electronics 13, no. 3 (2024). https://doi.org/10.3390/electronics13030521.
ieee: 'O. K. Aimiyekagbon, A. Bender, T. Hemsel, and W. Sextro, “Diagnostics of
Piezoelectric Bending Actuators Subjected to Varying Operating Conditions,” Electronics,
vol. 13, no. 3, Art. no. 521, 2024, doi: 10.3390/electronics13030521.'
mla: Aimiyekagbon, Osarenren Kennedy, et al. “Diagnostics of Piezoelectric Bending
Actuators Subjected to Varying Operating Conditions.” Electronics, vol.
13, no. 3, 521, MDPI AG, 2024, doi:10.3390/electronics13030521.
short: O.K. Aimiyekagbon, A. Bender, T. Hemsel, W. Sextro, Electronics 13 (2024).
date_created: 2024-02-20T06:46:43Z
date_updated: 2024-03-15T16:15:56Z
department:
- _id: '151'
doi: 10.3390/electronics13030521
funded_apc: '1'
intvolume: ' 13'
issue: '3'
keyword:
- piezoelectric transducer
- self-sensing
- fault detection
- diagnostics
- hairline crack
- condition monitoring
language:
- iso: eng
publication: Electronics
publication_identifier:
issn:
- 2079-9292
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Diagnostics of Piezoelectric Bending Actuators Subjected to Varying Operating
Conditions
type: journal_article
user_id: '9557'
volume: 13
year: '2024'
...
---
_id: '44672'
abstract:
- lang: eng
text: With enhancing digitalization, condition monitoring is used in an increasing
number of application fields across various industrial sectors. By its application,
increased reliability as well as reduced risks and costs can be achieved. Based
on different approaches, technical systems are monitored and measured data is
analyzed to enable condition-based or predictive maintenance. To this end, machine
learning approaches are usually implemented to diagnose the health states or predict
the health index of the monitored system. However, these trained models are often
black-box models, not intuitively explainable for a human. To overcome this shortcoming,
a model-based approach based on physics is developed for piezoelectric bending
actuators. Such a model enables a transparent representation of the system. Moreover,
the model-based approach is extended by a parameter-estimation to account for
sudden changes in behavior e. g. caused by occurring cracks.
article_number: '114399'
article_type: original
author:
- first_name: Amelie
full_name: Bender, Amelie
id: '54290'
last_name: Bender
citation:
ama: 'Bender A. Model-based condition monitoring of piezoelectric bending actuators.
Sensors and Actuators A: Physical. 2023;357. doi:10.1016/j.sna.2023.114399'
apa: 'Bender, A. (2023). Model-based condition monitoring of piezoelectric bending
actuators. Sensors and Actuators A: Physical, 357, Article 114399.
https://doi.org/10.1016/j.sna.2023.114399'
bibtex: '@article{Bender_2023, title={Model-based condition monitoring of piezoelectric
bending actuators}, volume={357}, DOI={10.1016/j.sna.2023.114399},
number={114399}, journal={Sensors and Actuators A: Physical}, publisher={Elsevier
BV}, author={Bender, Amelie}, year={2023} }'
chicago: 'Bender, Amelie. “Model-Based Condition Monitoring of Piezoelectric Bending
Actuators.” Sensors and Actuators A: Physical 357 (2023). https://doi.org/10.1016/j.sna.2023.114399.'
ieee: 'A. Bender, “Model-based condition monitoring of piezoelectric bending actuators,”
Sensors and Actuators A: Physical, vol. 357, Art. no. 114399, 2023, doi:
10.1016/j.sna.2023.114399.'
mla: 'Bender, Amelie. “Model-Based Condition Monitoring of Piezoelectric Bending
Actuators.” Sensors and Actuators A: Physical, vol. 357, 114399, Elsevier
BV, 2023, doi:10.1016/j.sna.2023.114399.'
short: 'A. Bender, Sensors and Actuators A: Physical 357 (2023).'
date_created: 2023-05-09T09:49:44Z
date_updated: 2023-05-09T09:53:31Z
department:
- _id: '151'
doi: 10.1016/j.sna.2023.114399
intvolume: ' 357'
keyword:
- Condition Monitoring
- Model-based approach Diagnostics
- Varying conditions
- Explainability
- Piezoelectric bending actuators
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://authors.elsevier.com/a/1h2WV3IC9dF7Hm
oa: '1'
publication: 'Sensors and Actuators A: Physical'
publication_identifier:
issn:
- 0924-4247
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: Model-based condition monitoring of piezoelectric bending actuators
type: journal_article
user_id: '54290'
volume: 357
year: '2023'
...
---
_id: '33500'
abstract:
- lang: eng
text: 'This article is dedicated to piezoelectric ultrasonic power transducers that
differ to well known medical ultrasonic diagnostic apparatus or non destructive
testing devices by the level of power in use; typically several tens of up to
more than thousand watts are used in a multitude of different applications. After
a short introduction including historical development, the first focus is on theoretical
background of the operating principle, design and mechanical modeling. As piezoelectric
elements transform electrical to mechanical energy and vice versa, equivalent
circuit modeling is also described. After that, sample applications are delineated
by the matter wherein ultrasound generates unique effects: incredible high pressure
level as well in air as in water, micro-bubbles generating temperature peaks for
very short time instances in fluids, acoustoplastic effect, enhancement of diffusion
and recrystallization in solids, friction manipulation, incremental deformation
and micro-cracking of surfaces, or even generation of macroscopic movements in
motors. At the end, some future directions ranging from novel modeling approaches
to advanced control and new materials are addressed.'
author:
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Jens
full_name: Twiefel, Jens
last_name: Twiefel
citation:
ama: 'Hemsel T, Twiefel J. Piezoelectric Ultrasonic Power Transducers. In: Reference
Module in Materials Science and Materials Engineering. Elsevier; 2022. doi:10.1016/b978-0-12-819728-8.00047-4'
apa: Hemsel, T., & Twiefel, J. (2022). Piezoelectric Ultrasonic Power Transducers.
In Reference Module in Materials Science and Materials Engineering. Elsevier.
https://doi.org/10.1016/b978-0-12-819728-8.00047-4
bibtex: '@inbook{Hemsel_Twiefel_2022, title={Piezoelectric Ultrasonic Power Transducers},
DOI={10.1016/b978-0-12-819728-8.00047-4},
booktitle={Reference Module in Materials Science and Materials Engineering}, publisher={Elsevier},
author={Hemsel, Tobias and Twiefel, Jens}, year={2022} }'
chicago: Hemsel, Tobias, and Jens Twiefel. “Piezoelectric Ultrasonic Power Transducers.”
In Reference Module in Materials Science and Materials Engineering. Elsevier,
2022. https://doi.org/10.1016/b978-0-12-819728-8.00047-4.
ieee: T. Hemsel and J. Twiefel, “Piezoelectric Ultrasonic Power Transducers,” in
Reference Module in Materials Science and Materials Engineering, Elsevier,
2022.
mla: Hemsel, Tobias, and Jens Twiefel. “Piezoelectric Ultrasonic Power Transducers.”
Reference Module in Materials Science and Materials Engineering, Elsevier,
2022, doi:10.1016/b978-0-12-819728-8.00047-4.
short: 'T. Hemsel, J. Twiefel, in: Reference Module in Materials Science and Materials
Engineering, Elsevier, 2022.'
date_created: 2022-09-30T09:35:16Z
date_updated: 2022-09-30T09:41:47Z
department:
- _id: '151'
doi: 10.1016/b978-0-12-819728-8.00047-4
keyword:
- Equivalent circuit model
- Langevin transducer
- Lumped parameter model
- Piezoelectric transducer
- Ultrasonic processes
- Ultrasound
language:
- iso: eng
main_file_link:
- url: https://www.sciencedirect.com/science/article/pii/B9780128197288000474
publication: Reference Module in Materials Science and Materials Engineering
publication_identifier:
isbn:
- 978-0-12-803581-8
publication_status: published
publisher: Elsevier
quality_controlled: '1'
status: public
title: Piezoelectric Ultrasonic Power Transducers
type: book_chapter
user_id: '210'
year: '2022'
...
---
_id: '12952'
author:
- first_name: Dmitrij
full_name: Dreiling, Dmitrij
id: '32616'
last_name: Dreiling
- first_name: Nadine
full_name: Feldmann, Nadine
id: '23082'
last_name: Feldmann
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Dreiling D, Feldmann N, Henning B. A DC bias approach to the characterisation
of non-linear material parameters of piezoelectric ceramics. In: AMA Service GmbH;
2019. doi:10.5162/sensoren2019/5.1.2'
apa: Dreiling, D., Feldmann, N., & Henning, B. (2019). A DC bias approach
to the characterisation of non-linear material parameters of piezoelectric ceramics.
20. GMA/ITG-Fachtagung Sensoren und Messsysteme 2019, Nürnberg. https://doi.org/10.5162/sensoren2019/5.1.2
bibtex: '@inproceedings{Dreiling_Feldmann_Henning_2019, title={A DC bias approach
to the characterisation of non-linear material parameters of piezoelectric ceramics},
DOI={10.5162/sensoren2019/5.1.2},
publisher={AMA Service GmbH}, author={Dreiling, Dmitrij and Feldmann, Nadine and
Henning, Bernd}, year={2019} }'
chicago: Dreiling, Dmitrij, Nadine Feldmann, and Bernd Henning. “A DC Bias Approach
to the Characterisation of Non-Linear Material Parameters of Piezoelectric Ceramics.”
AMA Service GmbH, 2019. https://doi.org/10.5162/sensoren2019/5.1.2.
ieee: 'D. Dreiling, N. Feldmann, and B. Henning, “A DC bias approach to the characterisation
of non-linear material parameters of piezoelectric ceramics,” presented at the
20. GMA/ITG-Fachtagung Sensoren und Messsysteme 2019, Nürnberg, 2019, doi: 10.5162/sensoren2019/5.1.2.'
mla: Dreiling, Dmitrij, et al. A DC Bias Approach to the Characterisation of
Non-Linear Material Parameters of Piezoelectric Ceramics. AMA Service GmbH,
2019, doi:10.5162/sensoren2019/5.1.2.
short: 'D. Dreiling, N. Feldmann, B. Henning, in: AMA Service GmbH, 2019.'
conference:
end_date: 2019-06-26
location: Nürnberg
name: 20. GMA/ITG-Fachtagung Sensoren und Messsysteme 2019
start_date: 2019-06-25
date_created: 2019-08-23T11:02:31Z
date_updated: 2026-01-05T08:28:49Z
department:
- _id: '49'
doi: 10.5162/sensoren2019/5.1.2
keyword:
- piezoelectric materials
- piezoelectric properties
- DC bias field
- non-linear material parameters
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.ama-science.org/proceedings/getFile/ZmDmAN
oa: '1'
project:
- _id: '90'
name: Ein modellbasiertes Messverfahren zur Charakterisierung der frequenzabhängigen
Materialeigenschaften von Piezokeramiken unter Verwendung eines einzelnen Probekörperindividuums
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
publisher: AMA Service GmbH
status: public
title: A DC bias approach to the characterisation of non-linear material parameters
of piezoelectric ceramics
type: conference
user_id: '32616'
year: '2019'
...
---
_id: '9978'
abstract:
- lang: eng
text: Piezoelectric transducers are used in a wide range of applications. Reliability
of these transducers is an important aspect in their application. Prognostics,
which involve continuous monitoring of the health of technical systems and using
this information to estimate the current health state and consequently predict
the remaining useful lifetime (RUL), can be used to increase the reliability,
safety, and availability of the transducers. This is achieved by utilizing the
health state and RUL predictions to adaptively control the usage of the components
or to schedule appropriate maintenance without interrupting operation. In this
work, a prognostic approach utilizing self-sensing, where electric signals of
a piezoelectric transducer are used as the condition monitoring data, is proposed.
The approach involves training machine learning algorithms to model the degradation
of the transducers through a health index and the use of the learned model to
estimate the health index of similar transducers. The current health index is
then used to estimate RUL of test components. The feasibility of the approach
is demonstrated using piezoelectric bimorphs and the results show that the method
is accurate in predicting the health index and RUL.
author:
- first_name: James Kuria
full_name: Kimotho, James Kuria
last_name: Kimotho
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
citation:
ama: 'Kimotho JK, Sextro W, Hemsel T. Estimation of Remaining Useful Lifetime of
Piezoelectric Transducers Based on Self-Sensing. In: IEEE Transactions on Reliability.
; 2017:1-10. doi:10.1109/TR.2017.2710260'
apa: Kimotho, J. K., Sextro, W., & Hemsel, T. (2017). Estimation of Remaining
Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing. In IEEE
Transactions on Reliability (pp. 1–10). https://doi.org/10.1109/TR.2017.2710260
bibtex: '@inproceedings{Kimotho_Sextro_Hemsel_2017, title={Estimation of Remaining
Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing}, DOI={10.1109/TR.2017.2710260},
booktitle={IEEE Transactions on Reliability}, author={Kimotho, James Kuria and
Sextro, Walter and Hemsel, Tobias}, year={2017}, pages={1–10} }'
chicago: Kimotho, James Kuria, Walter Sextro, and Tobias Hemsel. “Estimation of
Remaining Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing.”
In IEEE Transactions on Reliability, 1–10, 2017. https://doi.org/10.1109/TR.2017.2710260.
ieee: J. K. Kimotho, W. Sextro, and T. Hemsel, “Estimation of Remaining Useful Lifetime
of Piezoelectric Transducers Based on Self-Sensing,” in IEEE Transactions on
Reliability, 2017, pp. 1–10.
mla: Kimotho, James Kuria, et al. “Estimation of Remaining Useful Lifetime of Piezoelectric
Transducers Based on Self-Sensing.” IEEE Transactions on Reliability, 2017,
pp. 1–10, doi:10.1109/TR.2017.2710260.
short: 'J.K. Kimotho, W. Sextro, T. Hemsel, in: IEEE Transactions on Reliability,
2017, pp. 1–10.'
date_created: 2019-05-27T09:41:06Z
date_updated: 2019-09-16T10:32:05Z
department:
- _id: '151'
doi: 10.1109/TR.2017.2710260
keyword:
- Estimation of Remaining Useful Lifetime of Piezoelectric Transducers Based on Self-Sensing
language:
- iso: eng
page: 1 - 10
publication: IEEE Transactions on Reliability
quality_controlled: '1'
status: public
title: Estimation of Remaining Useful Lifetime of Piezoelectric Transducers Based
on Self-Sensing
type: conference
user_id: '55222'
year: '2017'
...
---
_id: '9868'
abstract:
- lang: eng
text: In order to increase mechanical strength, heat dissipation and ampacity and
to decrease failure through fatigue fracture, wedge copper wire bonding is being
introduced as a standard interconnection method for mass production. To achieve
the same process stability when using copper wire instead of aluminum wire a profound
understanding of the bonding process is needed. Due to the higher hardness of
copper compared to aluminum wire it is more difficult to approach the surfaces
of wire and substrate to a level where van der Waals forces are able to arise
between atoms. Also, enough friction energy referred to the total contact area
has to be generated to activate the surfaces. Therefore, a friction model is used
to simulate the joining process. This model calculates the resulting energy of
partial areas in the contact surface and provides information about the adhesion
process of each area. The focus here is on the arising of micro joints in the
contact area depending on the location in the contact and time. To validate the
model, different touchdown forces are used to vary the initial contact areas of
wire and substrate. Additionally, a piezoelectric tri-axial force sensor is built
up to identify the known phases of pre-deforming, cleaning, adhering and diffusing
for the real bonding process to map with the model. Test substrates as DBC and
copper plate are used to show the different formations of a wedge bond connection
due to hardness and reaction propensity. The experiments were done by using 500
$\mu$m copper wire and a standard V-groove tool.
author:
- first_name: Simon
full_name: Althoff, Simon
last_name: Althoff
- first_name: Jan
full_name: Neuhaus, Jan
last_name: Neuhaus
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Althoff S, Neuhaus J, Hemsel T, Sextro W. Improving the bond quality of copper
wire bonds using a friction model approach. In: Electronic Components and Technology
Conference (ECTC), 2014 IEEE 64th. ; 2014:1549-1555. doi:10.1109/ECTC.2014.6897500'
apa: Althoff, S., Neuhaus, J., Hemsel, T., & Sextro, W. (2014). Improving the
bond quality of copper wire bonds using a friction model approach. In Electronic
Components and Technology Conference (ECTC), 2014 IEEE 64th (pp. 1549–1555).
https://doi.org/10.1109/ECTC.2014.6897500
bibtex: '@inproceedings{Althoff_Neuhaus_Hemsel_Sextro_2014, title={Improving the
bond quality of copper wire bonds using a friction model approach}, DOI={10.1109/ECTC.2014.6897500},
booktitle={Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th},
author={Althoff, Simon and Neuhaus, Jan and Hemsel, Tobias and Sextro, Walter},
year={2014}, pages={1549–1555} }'
chicago: Althoff, Simon, Jan Neuhaus, Tobias Hemsel, and Walter Sextro. “Improving
the Bond Quality of Copper Wire Bonds Using a Friction Model Approach.” In Electronic
Components and Technology Conference (ECTC), 2014 IEEE 64th, 1549–55, 2014.
https://doi.org/10.1109/ECTC.2014.6897500.
ieee: S. Althoff, J. Neuhaus, T. Hemsel, and W. Sextro, “Improving the bond quality
of copper wire bonds using a friction model approach,” in Electronic Components
and Technology Conference (ECTC), 2014 IEEE 64th, 2014, pp. 1549–1555.
mla: Althoff, Simon, et al. “Improving the Bond Quality of Copper Wire Bonds Using
a Friction Model Approach.” Electronic Components and Technology Conference
(ECTC), 2014 IEEE 64th, 2014, pp. 1549–55, doi:10.1109/ECTC.2014.6897500.
short: 'S. Althoff, J. Neuhaus, T. Hemsel, W. Sextro, in: Electronic Components
and Technology Conference (ECTC), 2014 IEEE 64th, 2014, pp. 1549–1555.'
date_created: 2019-05-20T12:11:44Z
date_updated: 2019-09-16T10:57:58Z
department:
- _id: '151'
doi: 10.1109/ECTC.2014.6897500
keyword:
- adhesion
- circuit reliability
- deformation
- diffusion
- fatigue cracks
- friction
- interconnections
- lead bonding
- van der Waals forces
- Cu
- adhering process
- adhesion process
- ampacity improvement
- bond quality improvement
- cleaning process
- diffusing process
- fatigue fracture failure
- friction energy
- friction model
- heat dissipation
- mechanical strength
- piezoelectric triaxial force sensor
- predeforming process
- size 500 mum
- total contact area
- van der Waals forces
- wedge copper wire bonding
- Bonding
- Copper
- Finite element analysis
- Force
- Friction
- Substrates
- Wires
language:
- iso: eng
page: 1549-1555
publication: Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th
quality_controlled: '1'
status: public
title: Improving the bond quality of copper wire bonds using a friction model approach
type: conference
user_id: '55222'
year: '2014'
...
---
_id: '9878'
abstract:
- lang: eng
text: (K,Na)NbO3 ceramics have attracted much attention as lead-free piezoelectric
materials with high piezoelectric properties. High-quality (K,Na)NbO3 ceramics
can be sintered using KNbO3 and NaNbO3 powders synthesized by a hydrothermal method.
In this study, to enhance the quality factor of the ceramics, high-power ultrasonic
irradiation was employed during the hydrothermal method, which led to a reduction
in the particle size of the resultant powders.
author:
- first_name: G.
full_name: Isobe, G.
last_name: Isobe
- first_name: Takafumi
full_name: Maeda, Takafumi
last_name: Maeda
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Takeshi
full_name: Morita, Takeshi
last_name: Morita
citation:
ama: Isobe G, Maeda T, Bornmann P, Hemsel T, Morita T. Synthesis of lead-free piezoelectric
powders by ultrasonic-assisted hydrothermal method and properties of sintered
(K0.48Na0.52)NBO3 ceramics. Ultrasonics, Ferroelectrics, and Frequency Control,
IEEE Transactions on. 2014;61(2):225-230. doi:10.1109/TUFFC.2014.6722608
apa: Isobe, G., Maeda, T., Bornmann, P., Hemsel, T., & Morita, T. (2014). Synthesis
of lead-free piezoelectric powders by ultrasonic-assisted hydrothermal method
and properties of sintered (K0.48Na0.52)NBO3 ceramics. Ultrasonics, Ferroelectrics,
and Frequency Control, IEEE Transactions On, 61(2), 225–230. https://doi.org/10.1109/TUFFC.2014.6722608
bibtex: '@article{Isobe_Maeda_Bornmann_Hemsel_Morita_2014, title={Synthesis of lead-free
piezoelectric powders by ultrasonic-assisted hydrothermal method and properties
of sintered (K0.48Na0.52)NBO3 ceramics}, volume={61}, DOI={10.1109/TUFFC.2014.6722608},
number={2}, journal={Ultrasonics, Ferroelectrics, and Frequency Control, IEEE
Transactions on}, author={Isobe, G. and Maeda, Takafumi and Bornmann, Peter and
Hemsel, Tobias and Morita, Takeshi}, year={2014}, pages={225–230} }'
chicago: 'Isobe, G., Takafumi Maeda, Peter Bornmann, Tobias Hemsel, and Takeshi
Morita. “Synthesis of Lead-Free Piezoelectric Powders by Ultrasonic-Assisted Hydrothermal
Method and Properties of Sintered (K0.48Na0.52)NBO3 Ceramics.” Ultrasonics,
Ferroelectrics, and Frequency Control, IEEE Transactions On 61, no. 2 (2014):
225–30. https://doi.org/10.1109/TUFFC.2014.6722608.'
ieee: G. Isobe, T. Maeda, P. Bornmann, T. Hemsel, and T. Morita, “Synthesis of lead-free
piezoelectric powders by ultrasonic-assisted hydrothermal method and properties
of sintered (K0.48Na0.52)NBO3 ceramics,” Ultrasonics, Ferroelectrics, and Frequency
Control, IEEE Transactions on, vol. 61, no. 2, pp. 225–230, 2014.
mla: Isobe, G., et al. “Synthesis of Lead-Free Piezoelectric Powders by Ultrasonic-Assisted
Hydrothermal Method and Properties of Sintered (K0.48Na0.52)NBO3 Ceramics.” Ultrasonics,
Ferroelectrics, and Frequency Control, IEEE Transactions On, vol. 61, no.
2, 2014, pp. 225–30, doi:10.1109/TUFFC.2014.6722608.
short: G. Isobe, T. Maeda, P. Bornmann, T. Hemsel, T. Morita, Ultrasonics, Ferroelectrics,
and Frequency Control, IEEE Transactions On 61 (2014) 225–230.
date_created: 2019-05-20T13:10:14Z
date_updated: 2019-09-16T10:53:17Z
department:
- _id: '151'
doi: 10.1109/TUFFC.2014.6722608
intvolume: ' 61'
issue: '2'
keyword:
- Q-factor
- ceramics
- crystal growth from solution
- particle size
- piezoelectric materials
- potassium compounds
- powders
- sintering
- sodium compounds
- ultrasonic effects
- (K0.48Na0.52)NbO3
- KNbO3 powders
- NaNbO3 powders
- high-power ultrasonic irradiation
- lead-free piezoelectric materials
- lead-free piezoelectric powders
- particle size reduction
- piezoelectric properties
- quality factor
- sintered (K0.48Na0.52)NbO3 ceramics
- sintering
- ultrasonic-assisted hydrothermal method
- Acoustics
- Ceramics
- Lead
- Piezoelectric materials
- Powders
- Radiation effects
- Transducers
language:
- iso: eng
page: 225-230
publication: Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions
on
publication_identifier:
issn:
- 0885-3010
quality_controlled: '1'
status: public
title: Synthesis of lead-free piezoelectric powders by ultrasonic-assisted hydrothermal
method and properties of sintered (K0.48Na0.52)NBO3 ceramics
type: journal_article
user_id: '55222'
volume: 61
year: '2014'
...
---
_id: '9802'
abstract:
- lang: eng
text: It has been shown previously that ``slip-slip'' operation of piezoelectric
inertia motors allows higher velocities and smoother movements than classic ``stick-slip''
operation. One very promising driving option is to use a superposition of multiple
sinusoidal signals. In this contribution, previous theoretical results are validated
experimentally. The results confirm the theoretical result that for a given maximum
frequency, usually defined by the actuator characteristics, a signal with high
fundamental frequency and consisting of two superposed sine waves leads to the
highest velocity and the smoothest motion. This result is of fundamental importance
for the further development of high-velocity piezoelectric inertia motors.
author:
- first_name: Matthias
full_name: Hunstig, Matthias
last_name: Hunstig
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Hunstig M, Hemsel T, Sextro W. High-Velocity Slip-Slip Operation of Piezoelectric
Inertia Motors - Experimental Validation. In: Proceedings of 10th International
Workshop on Piezoelectric Materials and Applications and 8th Energy Harvesting
Workshop. Hannover, Germany; 2013:16-18.'
apa: Hunstig, M., Hemsel, T., & Sextro, W. (2013). High-Velocity Slip-Slip Operation
of Piezoelectric Inertia Motors - Experimental Validation. In Proceedings of
10th International Workshop on Piezoelectric Materials and Applications and 8th
Energy Harvesting Workshop (pp. 16–18). Hannover, Germany.
bibtex: '@inproceedings{Hunstig_Hemsel_Sextro_2013, place={Hannover, Germany}, title={High-Velocity
Slip-Slip Operation of Piezoelectric Inertia Motors - Experimental Validation},
booktitle={Proceedings of 10th International Workshop on Piezoelectric Materials
and Applications and 8th Energy Harvesting Workshop}, author={Hunstig, Matthias
and Hemsel, Tobias and Sextro, Walter}, year={2013}, pages={16–18} }'
chicago: Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “High-Velocity Slip-Slip
Operation of Piezoelectric Inertia Motors - Experimental Validation.” In Proceedings
of 10th International Workshop on Piezoelectric Materials and Applications and
8th Energy Harvesting Workshop, 16–18. Hannover, Germany, 2013.
ieee: M. Hunstig, T. Hemsel, and W. Sextro, “High-Velocity Slip-Slip Operation of
Piezoelectric Inertia Motors - Experimental Validation,” in Proceedings of
10th International Workshop on Piezoelectric Materials and Applications and 8th
Energy Harvesting Workshop, 2013, pp. 16–18.
mla: Hunstig, Matthias, et al. “High-Velocity Slip-Slip Operation of Piezoelectric
Inertia Motors - Experimental Validation.” Proceedings of 10th International
Workshop on Piezoelectric Materials and Applications and 8th Energy Harvesting
Workshop, 2013, pp. 16–18.
short: 'M. Hunstig, T. Hemsel, W. Sextro, in: Proceedings of 10th International
Workshop on Piezoelectric Materials and Applications and 8th Energy Harvesting
Workshop, Hannover, Germany, 2013, pp. 16–18.'
date_created: 2019-05-13T14:06:14Z
date_updated: 2022-01-06T07:04:21Z
department:
- _id: '151'
keyword:
- Piezoelectric inertia motor
- stick-slip motor
- driving signal
- velocity
- smoothness
language:
- iso: eng
page: 16-18
place: Hannover, Germany
publication: Proceedings of 10th International Workshop on Piezoelectric Materials
and Applications and 8th Energy Harvesting Workshop
status: public
title: High-Velocity Slip-Slip Operation of Piezoelectric Inertia Motors - Experimental
Validation
type: conference
user_id: '55222'
year: '2013'
...
---
_id: '9803'
abstract:
- lang: eng
text: Piezoelectric inertia motors, also known as stickslip drives or (smooth) impact
drives, use the inertia of a body to drive it by a friction contact in small steps,
in the majority of motors composed of a stick phase and a slip phase between the
friction partners. For optimizing inertia motors, it is important to understand
the friction contact correctly and to measure its properties appropriately. This
contribution presents experimental set-ups for measuring the contact force, friction
force and relative displacement in an actual inertia motor with a dry friction
contact and numerical simulations of the motor operation. The motor uses a pre-stressed
multilayer actuator with a displacement in the range of 20 $\mu$ m. It is shown
that a previously postulated condition for the applicability of simple kinetic
friction models is well fulfilled for the investigated motor. The friction contact
in the motor is simulated using different kinetic friction models. The input for
the friction models is the measured motion of the rod. The models qualitatively
reproduce the measured motion but show quantitative deviations varying with frequency.
These can be explained by vibrations of the driving rod that are experimentally
investigated.
author:
- first_name: Matthias
full_name: Hunstig, Matthias
last_name: Hunstig
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: Hunstig M, Hemsel T, Sextro W. Modelling the friction contact in an inertia
motor. Journal of Intelligent Material Systems and Structures. 2013;24(11):1380-1391.
doi:10.1177/1045389X12474354
apa: Hunstig, M., Hemsel, T., & Sextro, W. (2013). Modelling the friction contact
in an inertia motor. Journal of Intelligent Material Systems and Structures,
24(11), 1380–1391. https://doi.org/10.1177/1045389X12474354
bibtex: '@article{Hunstig_Hemsel_Sextro_2013, title={Modelling the friction contact
in an inertia motor}, volume={24}, DOI={10.1177/1045389X12474354},
number={11}, journal={Journal of Intelligent Material Systems and Structures},
author={Hunstig, Matthias and Hemsel, Tobias and Sextro, Walter}, year={2013},
pages={1380–1391} }'
chicago: 'Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “Modelling the Friction
Contact in an Inertia Motor.” Journal of Intelligent Material Systems and Structures
24, no. 11 (2013): 1380–91. https://doi.org/10.1177/1045389X12474354.'
ieee: M. Hunstig, T. Hemsel, and W. Sextro, “Modelling the friction contact in an
inertia motor,” Journal of Intelligent Material Systems and Structures,
vol. 24, no. 11, pp. 1380–1391, 2013.
mla: Hunstig, Matthias, et al. “Modelling the Friction Contact in an Inertia Motor.”
Journal of Intelligent Material Systems and Structures, vol. 24, no. 11,
2013, pp. 1380–91, doi:10.1177/1045389X12474354.
short: M. Hunstig, T. Hemsel, W. Sextro, Journal of Intelligent Material Systems
and Structures 24 (2013) 1380–1391.
date_created: 2019-05-13T14:08:01Z
date_updated: 2022-01-06T07:04:21Z
department:
- _id: '151'
doi: 10.1177/1045389X12474354
intvolume: ' 24'
issue: '11'
keyword:
- Actuator
- friction
- motor
- piezoelectric
language:
- iso: eng
page: 1380-1391
publication: Journal of Intelligent Material Systems and Structures
status: public
title: Modelling the friction contact in an inertia motor
type: journal_article
user_id: '55222'
volume: 24
year: '2013'
...
---
_id: '9866'
abstract:
- lang: eng
text: The hydrothermal method utilizes a solution-based chemical reaction to synthesize
piezoelectric thin films and powders. This method has a number of advantages,
such as low-temperature synthesis, and high purity and high quality of the product.
In order to promote hydrothermal reactions, we developed an ultrasonic assisted
hydrothermal method and confirmed that it produces dense and thick lead--zirconate--titanate
(PZT) films. In the hydrothermal method, a crystal growth process follows the
nucleation process. In this study, we verified that ultrasonic irradiation is
effective for the nucleation process, and there is an optimum irradiation period
to obtain thicker PZT films. With this optimization, a 9.2-$\mu$ m-thick PZT polycrystalline
film was obtained in a single deposition process. For this film, ultrasonic irradiation
was carried out from the beginning of the reaction for 18 h, followed by a 6 h
deposition without ultrasonic irradiation. These results indicate that the ultrasonic
irradiation mainly promotes the nucleation process.
author:
- first_name: Kanako
full_name: Ohta, Kanako
last_name: Ohta
- first_name: Gaku
full_name: Isobe, Gaku
last_name: Isobe
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Takeshi
full_name: Morita, Takeshi
last_name: Morita
citation:
ama: Ohta K, Isobe G, Bornmann P, Hemsel T, Morita T. Study on optimizing ultrasonic
irradiation period for thick polycrystalline PZT film by hydrothermal method.
Ultrasonics. 2013;53(4):837-841. doi:10.1016/j.ultras.2012.12.003
apa: Ohta, K., Isobe, G., Bornmann, P., Hemsel, T., & Morita, T. (2013). Study
on optimizing ultrasonic irradiation period for thick polycrystalline PZT film
by hydrothermal method. Ultrasonics, 53(4), 837–841. https://doi.org/10.1016/j.ultras.2012.12.003
bibtex: '@article{Ohta_Isobe_Bornmann_Hemsel_Morita_2013, title={Study on optimizing
ultrasonic irradiation period for thick polycrystalline PZT film by hydrothermal
method}, volume={53}, DOI={10.1016/j.ultras.2012.12.003},
number={4}, journal={Ultrasonics}, author={Ohta, Kanako and Isobe, Gaku and Bornmann,
Peter and Hemsel, Tobias and Morita, Takeshi}, year={2013}, pages={837–841} }'
chicago: 'Ohta, Kanako, Gaku Isobe, Peter Bornmann, Tobias Hemsel, and Takeshi Morita.
“Study on Optimizing Ultrasonic Irradiation Period for Thick Polycrystalline PZT
Film by Hydrothermal Method.” Ultrasonics 53, no. 4 (2013): 837–41. https://doi.org/10.1016/j.ultras.2012.12.003.'
ieee: K. Ohta, G. Isobe, P. Bornmann, T. Hemsel, and T. Morita, “Study on optimizing
ultrasonic irradiation period for thick polycrystalline PZT film by hydrothermal
method,” Ultrasonics, vol. 53, no. 4, pp. 837–841, 2013.
mla: Ohta, Kanako, et al. “Study on Optimizing Ultrasonic Irradiation Period for
Thick Polycrystalline PZT Film by Hydrothermal Method.” Ultrasonics, vol.
53, no. 4, 2013, pp. 837–41, doi:10.1016/j.ultras.2012.12.003.
short: K. Ohta, G. Isobe, P. Bornmann, T. Hemsel, T. Morita, Ultrasonics 53 (2013)
837–841.
date_created: 2019-05-20T12:03:07Z
date_updated: 2019-09-16T10:54:27Z
department:
- _id: '151'
doi: 10.1016/j.ultras.2012.12.003
intvolume: ' 53'
issue: '4'
keyword:
- Piezoelectric material
language:
- iso: eng
page: 837 - 841
publication: Ultrasonics
publication_identifier:
issn:
- 0041-624X
quality_controlled: '1'
status: public
title: Study on optimizing ultrasonic irradiation period for thick polycrystalline
PZT film by hydrothermal method
type: journal_article
user_id: '55222'
volume: 53
year: '2013'
...
---
_id: '9784'
abstract:
- lang: eng
text: Piezoelectric inertia motors use the inertia of a body to drive it by means
of a friction contact in a series of small steps. These motors can operate in
``stick-slip'' or ``slip-slip'' mode, with the fundamental frequency of the driving
signal ranging from several Hertz to more than 100 kHz. To predict the motor characteristics,
a Coulomb friction model is sufficient in many cases, but numerical simulation
requires microscopic time steps. This contribution proposes a much faster simulation
technique using one evaluation per period of the excitation signal. The proposed
technique produces results very close to those of timestep simulation for ultrasonics
inertia motors and allows direct determination of the steady-state velocity of
an inertia motor from the motion profile of the driving part. Thus it is a useful
simulation technique which can be applied in both analysis and design of inertia
motors, especially for parameter studies and optimisation.
author:
- first_name: Matthias
full_name: Hunstig, Matthias
last_name: Hunstig
- first_name: Tobias
full_name: Hemsel, Tobias
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
last_name: Sextro
citation:
ama: 'Hunstig M, Hemsel T, Sextro W. An efficient simulation technique for high-frequency
piezoelectric inertia motors. In: Ultrasonics Symposium (IUS), 2012 IEEE International.
; 2012:277-280. doi:10.1109/ULTSYM.2012.0068'
apa: Hunstig, M., Hemsel, T., & Sextro, W. (2012). An efficient simulation technique
for high-frequency piezoelectric inertia motors. In Ultrasonics Symposium (IUS),
2012 IEEE International (pp. 277–280). https://doi.org/10.1109/ULTSYM.2012.0068
bibtex: '@inproceedings{Hunstig_Hemsel_Sextro_2012, title={An efficient simulation
technique for high-frequency piezoelectric inertia motors}, DOI={10.1109/ULTSYM.2012.0068},
booktitle={Ultrasonics Symposium (IUS), 2012 IEEE International}, author={Hunstig,
Matthias and Hemsel, Tobias and Sextro, Walter}, year={2012}, pages={277–280}
}'
chicago: Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “An Efficient Simulation
Technique for High-Frequency Piezoelectric Inertia Motors.” In Ultrasonics
Symposium (IUS), 2012 IEEE International, 277–80, 2012. https://doi.org/10.1109/ULTSYM.2012.0068.
ieee: M. Hunstig, T. Hemsel, and W. Sextro, “An efficient simulation technique for
high-frequency piezoelectric inertia motors,” in Ultrasonics Symposium (IUS),
2012 IEEE International, 2012, pp. 277–280.
mla: Hunstig, Matthias, et al. “An Efficient Simulation Technique for High-Frequency
Piezoelectric Inertia Motors.” Ultrasonics Symposium (IUS), 2012 IEEE International,
2012, pp. 277–80, doi:10.1109/ULTSYM.2012.0068.
short: 'M. Hunstig, T. Hemsel, W. Sextro, in: Ultrasonics Symposium (IUS), 2012
IEEE International, 2012, pp. 277–280.'
date_created: 2019-05-13T13:20:17Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
doi: 10.1109/ULTSYM.2012.0068
keyword:
- friction
- ultrasonic motors
- Coulomb friction model
- efficient simulation technique
- friction contact
- high-frequency piezoelectric inertia motor
- motor characteristics prediction
- numerical simulation
- slip-slip mode
- stick-slip mode
- time-step simulation
- ultrasonic inertia motor
- Acceleration
- Acoustics
- Actuators
- Computational modeling
- Friction
- Numerical models
- Steady-state
language:
- iso: eng
page: 277-280
publication: Ultrasonics Symposium (IUS), 2012 IEEE International
publication_identifier:
issn:
- 1948-5719
quality_controlled: '1'
status: public
title: An efficient simulation technique for high-frequency piezoelectric inertia
motors
type: conference
user_id: '55222'
year: '2012'
...
---
_id: '9785'
abstract:
- lang: eng
text: Hydrothermal method enables to synthesize high quality piezoelectric materials.
To shorten the reaction time and to get higher quality materials, we propose an
ultrasonic irradiation to the solution during the hydrothermal method. We named
it ultrasonic assisted hydrothermal method (UAHTM). We have synthesized lead-free
piezoelectric material and PZT thin film and the effect of UAHTM have been confirmed.
In this study, we tried to improve UAHTM. First, to generate powerful and stable
ultrasonic irradiation at high temperature on UAHTM, we developed a new transducer
using LiNbO3 single crystal. Second, to prevent contamination to the materials,
A Teflon cover on the tip of transducer was attached.
author:
- first_name: Gaku
full_name: Isobe, Gaku
last_name: Isobe
- first_name: Ryo
full_name: Ageba, Ryo
last_name: Ageba
- first_name: Takafumi
full_name: Maeda, Takafumi
last_name: Maeda
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Takeshi
full_name: Morita, Takeshi
last_name: Morita
citation:
ama: 'Isobe G, Ageba R, Maeda T, Bornmann P, Hemsel T, Morita T. Synthesis of piezoelectric
materials by ultrasonic assisted hydrothermal method. In: B. J. Linde B, Paczkowski
J, Ponikwicki N, eds. AIP Conference Proceedings. Vol 1433. AIP; 2012:569-572.
doi:10.1063/1.3703251'
apa: Isobe, G., Ageba, R., Maeda, T., Bornmann, P., Hemsel, T., & Morita, T.
(2012). Synthesis of piezoelectric materials by ultrasonic assisted hydrothermal
method. In B. B. J. Linde, J. Paczkowski, & N. Ponikwicki (Eds.), AIP Conference
Proceedings (Vol. 1433, pp. 569–572). AIP. https://doi.org/10.1063/1.3703251
bibtex: '@inproceedings{Isobe_Ageba_Maeda_Bornmann_Hemsel_Morita_2012, title={Synthesis
of piezoelectric materials by ultrasonic assisted hydrothermal method}, volume={1433},
DOI={10.1063/1.3703251}, number={1},
booktitle={AIP Conference Proceedings}, publisher={AIP}, author={Isobe, Gaku and
Ageba, Ryo and Maeda, Takafumi and Bornmann, Peter and Hemsel, Tobias and Morita,
Takeshi}, editor={B. J. Linde, Bogumil and Paczkowski, Jacek and Ponikwicki, NikodemEditors},
year={2012}, pages={569–572} }'
chicago: Isobe, Gaku, Ryo Ageba, Takafumi Maeda, Peter Bornmann, Tobias Hemsel,
and Takeshi Morita. “Synthesis of Piezoelectric Materials by Ultrasonic Assisted
Hydrothermal Method.” In AIP Conference Proceedings, edited by Bogumil
B. J. Linde, Jacek Paczkowski, and Nikodem Ponikwicki, 1433:569–72. AIP, 2012.
https://doi.org/10.1063/1.3703251.
ieee: G. Isobe, R. Ageba, T. Maeda, P. Bornmann, T. Hemsel, and T. Morita, “Synthesis
of piezoelectric materials by ultrasonic assisted hydrothermal method,” in AIP
Conference Proceedings, 2012, vol. 1433, no. 1, pp. 569–572.
mla: Isobe, Gaku, et al. “Synthesis of Piezoelectric Materials by Ultrasonic Assisted
Hydrothermal Method.” AIP Conference Proceedings, edited by Bogumil B.
J. Linde et al., vol. 1433, no. 1, AIP, 2012, pp. 569–72, doi:10.1063/1.3703251.
short: 'G. Isobe, R. Ageba, T. Maeda, P. Bornmann, T. Hemsel, T. Morita, in: B.
B. J. Linde, J. Paczkowski, N. Ponikwicki (Eds.), AIP Conference Proceedings,
AIP, 2012, pp. 569–572.'
date_created: 2019-05-13T13:21:56Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
doi: 10.1063/1.3703251
editor:
- first_name: Bogumil
full_name: B. J. Linde, Bogumil
last_name: B. J. Linde
- first_name: Jacek
full_name: Paczkowski, Jacek
last_name: Paczkowski
- first_name: Nikodem
full_name: Ponikwicki, Nikodem
last_name: Ponikwicki
intvolume: ' 1433'
issue: '1'
keyword:
- contamination
- lead compounds
- piezoelectric materials
- piezoelectric thin films
- piezoelectric transducers
- ultrasonic effects
language:
- iso: eng
page: 569-572
publication: AIP Conference Proceedings
publisher: AIP
quality_controlled: '1'
status: public
title: Synthesis of piezoelectric materials by ultrasonic assisted hydrothermal method
type: conference
user_id: '55222'
volume: 1433
year: '2012'
...
---
_id: '9788'
abstract:
- lang: eng
text: 'A hydrothermal method utilizes a crystallization process in the solution
so that the pure and high-quality powders can be realized. Sintering from the
hydrothermal KNbO3 and NaNbO3 powders, a high-dense lead-free piezoelectric (K,Na)NbO3
ceramics could be obtained (density: 98.8\%). Concerning about the g33 constant,
high value as large as commercial PZT ceramics was measured. Therefore, the hydrothermal
(K,Na)NbO3 ceramics is usable for the sensors and the energy harvesting devices.
To demonstrate the (K,Na)NbO3 ceramics, a hydrophone sensor was fabricated and
evaluated.'
author:
- first_name: Takafumi
full_name: Maeda, Takafumi
last_name: Maeda
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Takeshi
full_name: Morita, Takeshi
last_name: Morita
citation:
ama: 'Maeda T, Bornmann P, Hemsel T, Morita T. Piezoelectric applications of hydrothermal
lead-free (K0.48Na0.52)NbO3 ceramics. In: Ultrasonics Symposium (IUS), 2012
IEEE International. ; 2012:194-195. doi:10.1109/ULTSYM.2012.0048'
apa: Maeda, T., Bornmann, P., Hemsel, T., & Morita, T. (2012). Piezoelectric
applications of hydrothermal lead-free (K0.48Na0.52)NbO3 ceramics. In Ultrasonics
Symposium (IUS), 2012 IEEE International (pp. 194–195). https://doi.org/10.1109/ULTSYM.2012.0048
bibtex: '@inproceedings{Maeda_Bornmann_Hemsel_Morita_2012, title={Piezoelectric
applications of hydrothermal lead-free (K0.48Na0.52)NbO3 ceramics}, DOI={10.1109/ULTSYM.2012.0048},
booktitle={Ultrasonics Symposium (IUS), 2012 IEEE International}, author={Maeda,
Takafumi and Bornmann, Peter and Hemsel, Tobias and Morita, Takeshi}, year={2012},
pages={194–195} }'
chicago: Maeda, Takafumi, Peter Bornmann, Tobias Hemsel, and Takeshi Morita. “Piezoelectric
Applications of Hydrothermal Lead-Free (K0.48Na0.52)NbO3 Ceramics.” In Ultrasonics
Symposium (IUS), 2012 IEEE International, 194–95, 2012. https://doi.org/10.1109/ULTSYM.2012.0048.
ieee: T. Maeda, P. Bornmann, T. Hemsel, and T. Morita, “Piezoelectric applications
of hydrothermal lead-free (K0.48Na0.52)NbO3 ceramics,” in Ultrasonics Symposium
(IUS), 2012 IEEE International, 2012, pp. 194–195.
mla: Maeda, Takafumi, et al. “Piezoelectric Applications of Hydrothermal Lead-Free
(K0.48Na0.52)NbO3 Ceramics.” Ultrasonics Symposium (IUS), 2012 IEEE International,
2012, pp. 194–95, doi:10.1109/ULTSYM.2012.0048.
short: 'T. Maeda, P. Bornmann, T. Hemsel, T. Morita, in: Ultrasonics Symposium (IUS),
2012 IEEE International, 2012, pp. 194–195.'
date_created: 2019-05-13T13:28:05Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
doi: 10.1109/ULTSYM.2012.0048
keyword:
- crystallisation
- hydrophones
- piezoceramics
- potassium compounds
- powder technology
- powders
- sensors
- sintering
- sodium compounds
- (K0.48Na0.52)NbO3
- KNbO3 powder
- NaNbO3 powder
- crystallization
- energy harvesting devices
- g33 constant
- hydrophone sensor
- hydrothermal lead-free (K0.48Na0.52)NbO3 ceramics
- hydrothermal method
- piezoelectric applications
- sintering
- Materials
- Transducers
language:
- iso: eng
page: 194-195
publication: Ultrasonics Symposium (IUS), 2012 IEEE International
publication_identifier:
issn:
- 1948-5719
quality_controlled: '1'
status: public
title: Piezoelectric applications of hydrothermal lead-free (K0.48Na0.52)NbO3 ceramics
type: conference
user_id: '55222'
year: '2012'
...
---
_id: '9806'
abstract:
- lang: eng
text: Piezoelectric inertia motors, also known as ``stick-slip-drives'', use the
inertia of a body to drive it by means of a friction contact in small steps. While
these steps normally involve stiction and sliding, the motors can also operate
in ``slip-slip'' mode without any phase of static friction. In this contribution,
a one degree of freedom model of an inertia motor driven by an ideal actuator
is analysed. Start-up and constant velocity operation of the motor are investigated
and appropriate quantities to compare ``stick-slip'' and ``slip-slip'' operation
are determined. Different aspects such as velocity, uniformity of motion, load
capacity, robustness, efficiency, and wear are considered. The analysis allows
both modes to be applied advantageously in different applications and can widen
the field of application of piezoelectric inertia motors. Motor designers are
enabled to choose the appropriate mode of operation and the best drive parameters
for their individual applications.
author:
- first_name: Matthias
full_name: Hunstig, Matthias
last_name: Hunstig
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: Hunstig M, Hemsel T, Sextro W. Analysis of different operation modes for inertia
motors. ACTUATOR 2012 Conference Proceedings. 2012:761-764.
apa: Hunstig, M., Hemsel, T., & Sextro, W. (2012). Analysis of different operation
modes for inertia motors. ACTUATOR 2012 Conference Proceedings, 761–764.
bibtex: '@article{Hunstig_Hemsel_Sextro_2012, title={Analysis of different operation
modes for inertia motors}, journal={ACTUATOR 2012 Conference Proceedings}, author={Hunstig,
Matthias and Hemsel, Tobias and Sextro, Walter}, year={2012}, pages={761–764}
}'
chicago: Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “Analysis of Different
Operation Modes for Inertia Motors.” ACTUATOR 2012 Conference Proceedings,
2012, 761–64.
ieee: M. Hunstig, T. Hemsel, and W. Sextro, “Analysis of different operation modes
for inertia motors,” ACTUATOR 2012 Conference Proceedings, pp. 761–764,
2012.
mla: Hunstig, Matthias, et al. “Analysis of Different Operation Modes for Inertia
Motors.” ACTUATOR 2012 Conference Proceedings, 2012, pp. 761–64.
short: M. Hunstig, T. Hemsel, W. Sextro, ACTUATOR 2012 Conference Proceedings (2012)
761–764.
date_created: 2019-05-13T14:11:37Z
date_updated: 2022-01-06T07:04:21Z
department:
- _id: '151'
keyword:
- Piezoelectric Inertia Motors
- Drive Signals
- Stick-slip
- Slip-slip
language:
- iso: eng
page: 761-764
publication: ACTUATOR 2012 Conference Proceedings
quality_controlled: '1'
status: public
title: Analysis of different operation modes for inertia motors
type: journal_article
user_id: '55222'
year: '2012'
...
---
_id: '9767'
abstract:
- lang: eng
text: The paper presents the results of numerical and experimental investigation
of cylindrical piezoelectric actuator used for achieving independent three degrees
of freedom oscillations of the contact point. The design of actuator based on
a hollow piezoelectric cylinder mounted on a metal rod. The piezoceramic cylinder
has a radial polarization and special configuration of the electrodes that cover
inner and outer surface of the cylinder. The main advantage of actuator's design
is that solid metallic rod operates as a part of inner electrode of the cylinder
and a stator of actuator. The geometry of piezoelectric actuator was adopted to
reach resonance of oscillations for the first longitudinal mode and the third
flexural mode at same frequency. The actuator is designed to move positioned object
through contact point which is located on the top of the rod. The optimal topology
of electrodes was found to achieve longitudinal and flexural oscillations of the
actuator in two perpendicular planes. Three degrees of freedom of the positioning
object can be achieved and control of the system can be implemented by applying
different excitation schemes and regimes. The numerical simulation and experimental
study of piezoelectric actuator was performed. Impedance of actuator was analyzed
under different excitation regimes. The results of numerical modeling and experimental
study were compared. Recommendations for the further development of this type
of actuator are given.
author:
- first_name: Raimundas
full_name: Lucinskis, Raimundas
last_name: Lucinskis
- first_name: Dalius
full_name: Mazeika, Dalius
last_name: Mazeika
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Ramutis
full_name: Bansevicius, Ramutis
last_name: Bansevicius
citation:
ama: Lucinskis R, Mazeika D, Hemsel T, Bansevicius R. Multi-DOF cylindrical piezoelectric
actuator with radial polarization. AIP Conference Proceedings. 2011;1433(1):693-696.
doi:10.1063/1.3703277
apa: Lucinskis, R., Mazeika, D., Hemsel, T., & Bansevicius, R. (2011). Multi-DOF
cylindrical piezoelectric actuator with radial polarization. AIP Conference
Proceedings, 1433(1), 693–696. https://doi.org/10.1063/1.3703277
bibtex: '@article{Lucinskis_Mazeika_Hemsel_Bansevicius_2011, title={Multi-DOF cylindrical
piezoelectric actuator with radial polarization}, volume={1433}, DOI={10.1063/1.3703277},
number={1}, journal={AIP Conference Proceedings}, publisher={AIP}, author={Lucinskis,
Raimundas and Mazeika, Dalius and Hemsel, Tobias and Bansevicius, Ramutis}, year={2011},
pages={693–696} }'
chicago: 'Lucinskis, Raimundas, Dalius Mazeika, Tobias Hemsel, and Ramutis Bansevicius.
“Multi-DOF Cylindrical Piezoelectric Actuator with Radial Polarization.” AIP
Conference Proceedings 1433, no. 1 (2011): 693–96. https://doi.org/10.1063/1.3703277.'
ieee: R. Lucinskis, D. Mazeika, T. Hemsel, and R. Bansevicius, “Multi-DOF cylindrical
piezoelectric actuator with radial polarization,” AIP Conference Proceedings,
vol. 1433, no. 1, pp. 693–696, 2011.
mla: Lucinskis, Raimundas, et al. “Multi-DOF Cylindrical Piezoelectric Actuator
with Radial Polarization.” AIP Conference Proceedings, vol. 1433, no. 1,
AIP, 2011, pp. 693–96, doi:10.1063/1.3703277.
short: R. Lucinskis, D. Mazeika, T. Hemsel, R. Bansevicius, AIP Conference Proceedings
1433 (2011) 693–696.
date_created: 2019-05-13T10:56:30Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
doi: 10.1063/1.3703277
intvolume: ' 1433'
issue: '1'
keyword:
- dielectric polarisation
- piezoceramics
- piezoelectric actuators
language:
- iso: eng
page: 693-696
publication: AIP Conference Proceedings
publisher: AIP
quality_controlled: '1'
status: public
title: Multi-DOF cylindrical piezoelectric actuator with radial polarization
type: journal_article
user_id: '55222'
volume: 1433
year: '2011'
...
---
_id: '9743'
abstract:
- lang: eng
text: The hydrothermal method enables the production of high-quality piezoelectric
materials. In this study, we propose to irradiate the reaction solutions with
ultrasonic power during the hydrothermal method to obtain a shorter reaction time
and a smooth film surface. A high-pressure reaction container for the ultrasonic
transducer was newly developed, and the ultrasonically-assisted hydrothermal method
was examined by using this container. The effect of ultrasonic assist on the synthesis
of lead-zirconate-titanate (PZT) thin films and (K,Na)NbO$_{3}$ powders was verified.
Thicker PZT film, thickness around 10 ${\mu}$m, could be obtained in one process,
and (K,Na)NbO$_{3}$ powder was synthesized in half the previous reaction time.
author:
- first_name: Ryo
full_name: Ageba, Ryo
last_name: Ageba
- first_name: Yoichi
full_name: Kadota, Yoichi
last_name: Kadota
- first_name: Takafumi
full_name: Maeda, Takafumi
last_name: Maeda
- first_name: Norihito
full_name: Takiguchi, Norihito
last_name: Takiguchi
- first_name: Takeshi
full_name: Morita, Takeshi
last_name: Morita
- first_name: Mutsuo
full_name: Ishikawa, Mutsuo
last_name: Ishikawa
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
citation:
ama: Ageba R, Kadota Y, Maeda T, et al. Ultrasonically-assisted Hydrothermal Method
for Ferroelectric Material Synthesis. Journal of Korean Physical Society.
2010;57(4):918-923. doi:10.3938/jkps.57.918
apa: Ageba, R., Kadota, Y., Maeda, T., Takiguchi, N., Morita, T., Ishikawa, M.,
… Hemsel, T. (2010). Ultrasonically-assisted Hydrothermal Method for Ferroelectric
Material Synthesis. Journal of Korean Physical Society, 57(4), 918–923.
https://doi.org/10.3938/jkps.57.918
bibtex: '@article{Ageba_Kadota_Maeda_Takiguchi_Morita_Ishikawa_Bornmann_Hemsel_2010,
title={Ultrasonically-assisted Hydrothermal Method for Ferroelectric Material
Synthesis}, volume={57}, DOI={10.3938/jkps.57.918},
number={4}, journal={Journal of Korean Physical Society}, author={Ageba, Ryo and
Kadota, Yoichi and Maeda, Takafumi and Takiguchi, Norihito and Morita, Takeshi
and Ishikawa, Mutsuo and Bornmann, Peter and Hemsel, Tobias}, year={2010}, pages={918–923}
}'
chicago: 'Ageba, Ryo, Yoichi Kadota, Takafumi Maeda, Norihito Takiguchi, Takeshi
Morita, Mutsuo Ishikawa, Peter Bornmann, and Tobias Hemsel. “Ultrasonically-Assisted
Hydrothermal Method for Ferroelectric Material Synthesis.” Journal of Korean
Physical Society 57, no. 4 (2010): 918–23. https://doi.org/10.3938/jkps.57.918.'
ieee: R. Ageba et al., “Ultrasonically-assisted Hydrothermal Method for Ferroelectric
Material Synthesis,” Journal of Korean Physical Society, vol. 57, no. 4,
pp. 918–923, 2010.
mla: Ageba, Ryo, et al. “Ultrasonically-Assisted Hydrothermal Method for Ferroelectric
Material Synthesis.” Journal of Korean Physical Society, vol. 57, no. 4,
2010, pp. 918–23, doi:10.3938/jkps.57.918.
short: R. Ageba, Y. Kadota, T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, P. Bornmann,
T. Hemsel, Journal of Korean Physical Society 57 (2010) 918–923.
date_created: 2019-05-13T09:35:33Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
doi: 10.3938/jkps.57.918
intvolume: ' 57'
issue: '4'
keyword:
- Hydrothermal method
- High-power ultrasonic
- PZT thin film
- Lead-free piezoelectric materials
language:
- iso: eng
page: 918-923
publication: Journal of Korean Physical Society
publication_identifier:
issn:
- 1948-5719
quality_controlled: '1'
status: public
title: Ultrasonically-assisted Hydrothermal Method for Ferroelectric Material Synthesis
type: journal_article
user_id: '55222'
volume: 57
year: '2010'
...
---
_id: '9745'
abstract:
- lang: eng
text: In the modeling of piezoelectric Langevin transducers using usual transfer
matrix methods, some simplifications have been adopted. This leads to reduction
of the model quality. A mixed transfer matrix method is employed in the modeling
of Langevin transducers, where the pre-stressed bolt is modeled as a separate
four-pole element, which is connected to other elements in parallel. Based on
the mixed transfer matrix method, the four (six)-pole element description of the
piezoelectric Langevin transducer is built up and the total transfer matrix relation
is derived. The resonance frequencies of the transducer are calculated and then
measured using the impedance analyzer (HP4192). Experimental result shows that
the mixed transfer matrix method has better modeling quality than the usual transfer
matrix method for the vibration analysis of piezoelectric Langevin transducers.
author:
- first_name: Bo
full_name: Fu, Bo
last_name: Fu
- first_name: Chao
full_name: Li, Chao
last_name: Li
- first_name: Jianming
full_name: Zhang, Jianming
last_name: Zhang
- first_name: Zhenwei
full_name: Huang, Zhenwei
last_name: Huang
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
citation:
ama: Fu B, Li C, Zhang J, Huang Z, Hemsel T. Modeling of Piezoelectric Langevin
Transducers by Using Mixed Transfer Matrix Methods. Journal of Korean Physical
Society. 2010;57(4):929. doi:10.3938/jkps.57.929
apa: Fu, B., Li, C., Zhang, J., Huang, Z., & Hemsel, T. (2010). Modeling of
Piezoelectric Langevin Transducers by Using Mixed Transfer Matrix Methods. Journal
of Korean Physical Society, 57(4), 929. https://doi.org/10.3938/jkps.57.929
bibtex: '@article{Fu_Li_Zhang_Huang_Hemsel_2010, title={Modeling of Piezoelectric
Langevin Transducers by Using Mixed Transfer Matrix Methods}, volume={57}, DOI={10.3938/jkps.57.929}, number={4},
journal={Journal of Korean Physical Society}, author={Fu, Bo and Li, Chao and
Zhang, Jianming and Huang, Zhenwei and Hemsel, Tobias}, year={2010}, pages={929}
}'
chicago: 'Fu, Bo, Chao Li, Jianming Zhang, Zhenwei Huang, and Tobias Hemsel. “Modeling
of Piezoelectric Langevin Transducers by Using Mixed Transfer Matrix Methods.”
Journal of Korean Physical Society 57, no. 4 (2010): 929. https://doi.org/10.3938/jkps.57.929.'
ieee: B. Fu, C. Li, J. Zhang, Z. Huang, and T. Hemsel, “Modeling of Piezoelectric
Langevin Transducers by Using Mixed Transfer Matrix Methods,” Journal of Korean
Physical Society, vol. 57, no. 4, p. 929, 2010.
mla: Fu, Bo, et al. “Modeling of Piezoelectric Langevin Transducers by Using Mixed
Transfer Matrix Methods.” Journal of Korean Physical Society, vol. 57,
no. 4, 2010, p. 929, doi:10.3938/jkps.57.929.
short: B. Fu, C. Li, J. Zhang, Z. Huang, T. Hemsel, Journal of Korean Physical Society
57 (2010) 929.
date_created: 2019-05-13T09:40:42Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
doi: 10.3938/jkps.57.929
intvolume: ' 57'
issue: '4'
keyword:
- Piezoelectric langevin transducer
- Transfer matrix method
- Four (six)-pole element description
- Pre-stressed bolt
language:
- iso: eng
page: '929'
publication: Journal of Korean Physical Society
publication_identifier:
issn:
- 1948-5719
quality_controlled: '1'
status: public
title: Modeling of Piezoelectric Langevin Transducers by Using Mixed Transfer Matrix
Methods
type: journal_article
user_id: '55222'
volume: 57
year: '2010'
...
---
_id: '9749'
abstract:
- lang: eng
text: Piezoelectric materials find wide application in technical systems. Most often,
a combination of piezoelectric and other materials is advantageous. The position
and the amount of the piezoelectric material within the overall system depends
on various aspects like maximum mechanical output to the load, maximum electromechanical
efficiency of the system, maximum utilization of the piezoelectric material, minimum
self-heating of the piezoelectric material, and controllability of the system,
which might be key aspects for the optimisation of the system design. For a composite
longitudinal vibrator (bolted Langevin transducer), which is a base for many technical
applications, this contribution shows in detail, how above mentioned aspects depend
on the position and volume of the piezoelectric material related to the mode shape.
author:
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Ernst Günther
full_name: Lierk, Ernst Günther
last_name: Lierk
- first_name: Walter
full_name: Littmann, Walter
last_name: Littmann
- first_name: Takeshi
full_name: Morita, Takeshi
last_name: Morita
citation:
ama: Hemsel T, Lierk EG, Littmann W, Morita T. Various Aspects of the Placement
of a Piezoelectric Material in Composite Actuators, Motors, and Transducers. Journal
of Korean Physical Society. 2010;57(4):933-937. doi:10.3938/jkps.57.933
apa: Hemsel, T., Lierk, E. G., Littmann, W., & Morita, T. (2010). Various Aspects
of the Placement of a Piezoelectric Material in Composite Actuators, Motors, and
Transducers. Journal of Korean Physical Society, 57(4), 933–937.
https://doi.org/10.3938/jkps.57.933
bibtex: '@article{Hemsel_Lierk_Littmann_Morita_2010, title={Various Aspects of the
Placement of a Piezoelectric Material in Composite Actuators, Motors, and Transducers},
volume={57}, DOI={10.3938/jkps.57.933},
number={4}, journal={Journal of Korean Physical Society}, author={Hemsel, Tobias
and Lierk, Ernst Günther and Littmann, Walter and Morita, Takeshi}, year={2010},
pages={933–937} }'
chicago: 'Hemsel, Tobias, Ernst Günther Lierk, Walter Littmann, and Takeshi Morita.
“Various Aspects of the Placement of a Piezoelectric Material in Composite Actuators,
Motors, and Transducers.” Journal of Korean Physical Society 57, no. 4
(2010): 933–37. https://doi.org/10.3938/jkps.57.933.'
ieee: T. Hemsel, E. G. Lierk, W. Littmann, and T. Morita, “Various Aspects of the
Placement of a Piezoelectric Material in Composite Actuators, Motors, and Transducers,”
Journal of Korean Physical Society, vol. 57, no. 4, pp. 933–937, 2010.
mla: Hemsel, Tobias, et al. “Various Aspects of the Placement of a Piezoelectric
Material in Composite Actuators, Motors, and Transducers.” Journal of Korean
Physical Society, vol. 57, no. 4, 2010, pp. 933–37, doi:10.3938/jkps.57.933.
short: T. Hemsel, E.G. Lierk, W. Littmann, T. Morita, Journal of Korean Physical
Society 57 (2010) 933–937.
date_created: 2019-05-13T09:56:22Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
doi: 10.3938/jkps.57.933
intvolume: ' 57'
issue: '4'
keyword:
- Bolted Langevin transducer
- Optimum placement of piezoelectric ceramics
language:
- iso: eng
page: 933-937
publication: Journal of Korean Physical Society
publication_identifier:
issn:
- 1948-5719
quality_controlled: '1'
status: public
title: Various Aspects of the Placement of a Piezoelectric Material in Composite Actuators,
Motors, and Transducers
type: journal_article
user_id: '55222'
volume: 57
year: '2010'
...
---
_id: '9758'
abstract:
- lang: eng
text: As a lead-free piezoelectric ceramics, (K,Na)NbO$_{3}$ is a promising material
because of its good piezoelectric properties. In this study, (K$_{1-x}$Na$_{x}$)NbO$_{3}$
ceramics were synthesized from a KNbO$_{3}$ and NaNbO$_{3}$ mixture powder prepared
by the hydrothermal reaction. The hydrothermal reaction enables the production
of high quality powder for the ceramics fabrication process. To obtain (K$_{1-x}$Na$_{x}$)NbO$_{3}$
ceramics, these two powders KNbO$_{3}$ and NaNbO$_{3}$ were mixed and then sintered
together. X-Ray diffraction analysis revealed that the solid solution ceramics
(K$_{1-x}$Na$_{x}$)NbO$_{3}$ was produced by the sintering process. The K/Na ratio
in (K$_{1-x}$Na$_{x}$)NbO$_{3}$ ceramics was optimized for the best piezoelectric
properties. The optimized forms was (K$_{0.48}$Na$_{0.52}$)NbO$_{3}$, which showed
the following piezoelectric properties; k$_{33}$=0.56, d$_{33}$=114pC/N. In addition,
the ferroelectric properties, P$_{r}$=7.72mC/cm$^{2}$, E$_{c}$=857V/mm, and the
Curie temperature T$_{c}$=420$_{o}$C were also measured.
author:
- first_name: Takafumi
full_name: Maeda, Takafumi
last_name: Maeda
- first_name: Norihito
full_name: Takiguchi, Norihito
last_name: Takiguchi
- first_name: Takeshi
full_name: Morita, Takeshi
last_name: Morita
- first_name: Mutsuo
full_name: Ishikawa, Mutsuo
last_name: Ishikawa
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
citation:
ama: Maeda T, Takiguchi N, Morita T, Ishikawa M, Hemsel T. Hydrothermal (K1-xNax)NbO3
Lead-free Piezoelectric Ceramics. Journal of Korean Physical Society. 2010;57(4):924-928.
doi:10.3938/jkps.57.924
apa: Maeda, T., Takiguchi, N., Morita, T., Ishikawa, M., & Hemsel, T. (2010).
Hydrothermal (K1-xNax)NbO3 Lead-free Piezoelectric Ceramics. Journal of Korean
Physical Society, 57(4), 924–928. https://doi.org/10.3938/jkps.57.924
bibtex: '@article{Maeda_Takiguchi_Morita_Ishikawa_Hemsel_2010, title={Hydrothermal
(K1-xNax)NbO3 Lead-free Piezoelectric Ceramics}, volume={57}, DOI={10.3938/jkps.57.924},
number={4}, journal={Journal of Korean Physical Society}, author={Maeda, Takafumi
and Takiguchi, Norihito and Morita, Takeshi and Ishikawa, Mutsuo and Hemsel, Tobias},
year={2010}, pages={924–928} }'
chicago: 'Maeda, Takafumi, Norihito Takiguchi, Takeshi Morita, Mutsuo Ishikawa,
and Tobias Hemsel. “Hydrothermal (K1-XNax)NbO3 Lead-Free Piezoelectric Ceramics.”
Journal of Korean Physical Society 57, no. 4 (2010): 924–28. https://doi.org/10.3938/jkps.57.924.'
ieee: T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, and T. Hemsel, “Hydrothermal
(K1-xNax)NbO3 Lead-free Piezoelectric Ceramics,” Journal of Korean Physical
Society, vol. 57, no. 4, pp. 924–928, 2010.
mla: Maeda, Takafumi, et al. “Hydrothermal (K1-XNax)NbO3 Lead-Free Piezoelectric
Ceramics.” Journal of Korean Physical Society, vol. 57, no. 4, 2010, pp.
924–28, doi:10.3938/jkps.57.924.
short: T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, T. Hemsel, Journal of Korean
Physical Society 57 (2010) 924–928.
date_created: 2019-05-13T10:19:43Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
doi: 10.3938/jkps.57.924
intvolume: ' 57'
issue: '4'
keyword:
- Lead-free piezoelectric material
- KNN
- Hydrothermal method
language:
- iso: eng
page: 924-928
publication: Journal of Korean Physical Society
publication_identifier:
issn:
- 1948-5719
quality_controlled: '1'
status: public
title: Hydrothermal (K1-xNax)NbO3 Lead-free Piezoelectric Ceramics
type: journal_article
user_id: '55222'
volume: 57
year: '2010'
...