---
_id: '58510'
abstract:
- lang: eng
text: 'Today’s ultrasonic transducers find broad application in diverse
technology branches and most often cannot be replaced by other actuators. They
are typically based on lead-containing piezoelectric ceramics. These should be
replaced for environmental and health issues by lead-free alternatives. Multiple
material alternatives are already known, but there is a lack of information about
their technological readiness level. To fill this gap, a small series of prestressed
longitudinally vibrating transducers was set up with a standard PZT material and
two lead-free variants within this study. The entire process for building the
transducers is documented: characteristics of individual ring ceramics, burn-in
results, and free vibration and characteristics under load are shown. The main
result is that the investigated lead-free materials are ready to use within ultrasonic
bolted Langevin transducers (BLTs) for medium-power applications, when the geometrical
setup of the transducer is adopted. Since lead-free ceramics need higher voltages
to achieve the same power level, the driving electronics or the mechanical setup
must be altered specifically for each material. Lower self-heating of the lead-free
materials might be attractive for heat-sensitive processes.'
article_number: '55'
article_type: original
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. Lead-Free Ceramics in Prestressed
Ultrasonic Transducers. Actuators. 2025;14(2). doi:10.3390/act14020055
apa: Scheidemann, C., Bornmann, P., Littmann, W., & Hemsel, T. (2025). Lead-Free
Ceramics in Prestressed Ultrasonic Transducers. Actuators, 14(2),
Article 55. https://doi.org/10.3390/act14020055
bibtex: '@article{Scheidemann_Bornmann_Littmann_Hemsel_2025, title={Lead-Free Ceramics
in Prestressed Ultrasonic Transducers}, volume={14}, DOI={10.3390/act14020055},
number={255}, journal={Actuators}, publisher={MDPI AG}, author={Scheidemann, Claus
and Bornmann, Peter and Littmann, Walter and Hemsel, Tobias}, year={2025} }'
chicago: Scheidemann, Claus, Peter Bornmann, Walter Littmann, and Tobias Hemsel.
“Lead-Free Ceramics in Prestressed Ultrasonic Transducers.” Actuators 14,
no. 2 (2025). https://doi.org/10.3390/act14020055.
ieee: 'C. Scheidemann, P. Bornmann, W. Littmann, and T. Hemsel, “Lead-Free Ceramics
in Prestressed Ultrasonic Transducers,” Actuators, vol. 14, no. 2, Art.
no. 55, 2025, doi: 10.3390/act14020055.'
mla: Scheidemann, Claus, et al. “Lead-Free Ceramics in Prestressed Ultrasonic Transducers.”
Actuators, vol. 14, no. 2, 55, MDPI AG, 2025, doi:10.3390/act14020055.
short: C. Scheidemann, P. Bornmann, W. Littmann, T. Hemsel, Actuators 14 (2025).
date_created: 2025-02-04T13:43:23Z
date_updated: 2025-02-04T13:46:41Z
department:
- _id: '151'
doi: 10.3390/act14020055
intvolume: ' 14'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/2076-0825/14/2/55
oa: '1'
publication: Actuators
publication_identifier:
issn:
- 2076-0825
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Lead-Free Ceramics in Prestressed Ultrasonic Transducers
type: journal_article
user_id: '210'
volume: 14
year: '2025'
...
---
_id: '62300'
author:
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Jonas
full_name: Hölscher, Jonas
id: '73952'
last_name: Hölscher
- first_name: Olga
full_name: Friesen, Olga
id: '44026'
last_name: Friesen
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Claes L, Hölscher J, Friesen O, Scheidemann C, Hemsel T, Henning B. Estimation
of third order elastic constants of piezoceramics using DC biased impedance measurements.
In: 2025 International Congress on Ultrasonics. AMA Service GmbH; 2025:142–145.
doi:10.5162/ultrasonic2025/a18-a6'
apa: Claes, L., Hölscher, J., Friesen, O., Scheidemann, C., Hemsel, T., & Henning,
B. (2025). Estimation of third order elastic constants of piezoceramics using
DC biased impedance measurements. 2025 International Congress on Ultrasonics,
142–145. https://doi.org/10.5162/ultrasonic2025/a18-a6
bibtex: '@inproceedings{Claes_Hölscher_Friesen_Scheidemann_Hemsel_Henning_2025,
place={Paderborn}, title={Estimation of third order elastic constants of piezoceramics
using DC biased impedance measurements}, DOI={10.5162/ultrasonic2025/a18-a6},
booktitle={2025 International Congress on Ultrasonics}, publisher={AMA Service
GmbH}, author={Claes, Leander and Hölscher, Jonas and Friesen, Olga and Scheidemann,
Claus and Hemsel, Tobias and Henning, Bernd}, year={2025}, pages={142–145} }'
chicago: 'Claes, Leander, Jonas Hölscher, Olga Friesen, Claus Scheidemann, Tobias
Hemsel, and Bernd Henning. “Estimation of Third Order Elastic Constants of Piezoceramics
Using DC Biased Impedance Measurements.” In 2025 International Congress on
Ultrasonics, 142–145. Paderborn: AMA Service GmbH, 2025. https://doi.org/10.5162/ultrasonic2025/a18-a6.'
ieee: 'L. Claes, J. Hölscher, O. Friesen, C. Scheidemann, T. Hemsel, and B. Henning,
“Estimation of third order elastic constants of piezoceramics using DC biased
impedance measurements,” in 2025 International Congress on Ultrasonics,
2025, pp. 142–145, doi: 10.5162/ultrasonic2025/a18-a6.'
mla: Claes, Leander, et al. “Estimation of Third Order Elastic Constants of Piezoceramics
Using DC Biased Impedance Measurements.” 2025 International Congress on Ultrasonics,
AMA Service GmbH, 2025, pp. 142–145, doi:10.5162/ultrasonic2025/a18-a6.
short: 'L. Claes, J. Hölscher, O. Friesen, C. Scheidemann, T. Hemsel, B. Henning,
in: 2025 International Congress on Ultrasonics, AMA Service GmbH, Paderborn, 2025,
pp. 142–145.'
date_created: 2025-11-25T12:23:06Z
date_updated: 2026-01-13T13:00:31Z
department:
- _id: '49'
doi: 10.5162/ultrasonic2025/a18-a6
language:
- iso: eng
page: 142–145
place: Paderborn
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
publication: 2025 International Congress on Ultrasonics
publisher: AMA Service GmbH
status: public
title: Estimation of third order elastic constants of piezoceramics using DC biased
impedance measurements
type: conference
user_id: '11829'
year: '2025'
...
---
_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: '64800'
abstract:
- lang: eng
text: "Intensive ultrasonic cleaning of surfaces by means of a lead-free ultrasonic
transducer with focusing sonotrode\r\nUltrasonic cleaning baths are probably a
coincidental development: After underwater sonars had already been successfully
used to detect submarines before 1920, it was probably observed in this environment
that the ultrasonic oscillators not only showed a self-cleaning effect but also
cavitation damage. At the beginning of the 1950s, the first ultrasonic cleaning
devices finally came onto the market. Today, the range of applications ranges
from household appliances for jewellery and eyewear cleaning to classic cleaning
baths for metal parts and systems for cleaning highly sensitive electronic components.
There is a certain gap in handheld, mobile cleaning equipment. Although devices
for spot cleaning of textiles are known, the cleaning effect is usually low. \r\nDue
to the directive 2011/65/EU on the restriction of the use of hazardous substances
in electrical and electronic equipment (RoHS) [1] lead should no longer be used
in technical devices. As today’s standard ceramics for medium and high-power ultrasonic
transducers typically contain lead, there is a need to explore the use of lead-free
ceramics in this field. Honda [2] already offers a cleaning transducer based on
lead-free piezoelectric ceramics, but it is designed to be used in cleaning baths.\r\nThis
article presents the model-based development of a highly innovative ultrasonic
cleaner. On the one hand, lead-free piezoelectric ceramics are used, and on the
other hand, a special sonotrode has been developed that concentrates the sound
in such a way that a strong cavitation and thus cleaning effect is achieved with
comparatively low power in a short time. Coupled field finite element method was
used to find an appropriate geometry for the focussing sonotrode. The comparison
of simulation and measurement results shows that the lead-free piezoceramics used
do their job well and can keep up with standard ceramics, but more ceramic volume
is needed to achieve same power. An advanced control concept was elaborated to
ensure continuous hard cavitation at varying distances between the sonotrode and
the part to be cleaned. Cleaning results for different surfaces and contaminations
are presented. The concept of the focusing sonotrode shows that a convincing cleaning
result can be achieved even with low power and in short time, provided that the
oscillation system and control electronics are suitably coordinated.\r\n\r\nReferences\r\n[1]
http://data.europa.eu/eli/dir/2011/65/2024-08-01 \r\n[2] https://en.honda-el.co.jp/product/ceramics/lineup/lead_off/lead-off
\r\n"
author:
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- 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: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Hemsel T, Scheidemann C, Bornmann P, Littmann W, Sextro W. Intensive ultrasonic
cleaning of surfaces by means of lead-free ultrasonic transducer with focussing
sonotrode. In: ; 2025.'
apa: Hemsel, T., Scheidemann, C., Bornmann, P., Littmann, W., & Sextro, W. (2025).
Intensive ultrasonic cleaning of surfaces by means of lead-free ultrasonic
transducer with focussing sonotrode. International Congress on Ultrasonics
(ICU), Paderborn, Germany.
bibtex: '@inproceedings{Hemsel_Scheidemann_Bornmann_Littmann_Sextro_2025, title={Intensive
ultrasonic cleaning of surfaces by means of lead-free ultrasonic transducer with
focussing sonotrode}, author={Hemsel, Tobias and Scheidemann, Claus and Bornmann,
Peter and Littmann, Walter and Sextro, Walter}, year={2025} }'
chicago: Hemsel, Tobias, Claus Scheidemann, Peter Bornmann, Walter Littmann, and
Walter Sextro. “Intensive Ultrasonic Cleaning of Surfaces by Means of Lead-Free
Ultrasonic Transducer with Focussing Sonotrode,” 2025.
ieee: T. Hemsel, C. Scheidemann, P. Bornmann, W. Littmann, and W. Sextro, “Intensive
ultrasonic cleaning of surfaces by means of lead-free ultrasonic transducer with
focussing sonotrode,” presented at the International Congress on Ultrasonics (ICU),
Paderborn, Germany, 2025.
mla: Hemsel, Tobias, et al. Intensive Ultrasonic Cleaning of Surfaces by Means
of Lead-Free Ultrasonic Transducer with Focussing Sonotrode. 2025.
short: 'T. Hemsel, C. Scheidemann, P. Bornmann, W. Littmann, W. Sextro, in: 2025.'
conference:
end_date: 2025-09-25
location: Paderborn, Germany
name: International Congress on Ultrasonics (ICU)
start_date: 2025-09-21
date_created: 2026-03-02T10:47:48Z
date_updated: 2026-03-02T10:58:37Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: open_access
content_type: application/pdf
creator: hemsel
date_created: 2026-03-02T10:46:43Z
date_updated: 2026-03-02T10:58:37Z
file_id: '64801'
file_name: ICU_2025_Hemsel.pdf
file_size: 1946202
relation: main_file
file_date_updated: 2026-03-02T10:58:37Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
status: public
title: Intensive ultrasonic cleaning of surfaces by means of lead-free ultrasonic
transducer with focussing sonotrode
type: conference
user_id: '210'
year: '2025'
...
---
_id: '61755'
author:
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- 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: 'Scheidemann C, Hemsel T, Sextro W. Time dependent material characteristics
of prestressed piezoelectric ceramics in langevin transducers. In: ; 2025.'
apa: Scheidemann, C., Hemsel, T., & Sextro, W. (2025). Time dependent material
characteristics of prestressed piezoelectric ceramics in langevin transducers.
22nd International Workshop on Piezoelectric Materials and Applications in Actuators
(IWPMA), Vilnius, Lithuania.
bibtex: '@inproceedings{Scheidemann_Hemsel_Sextro_2025, title={Time dependent material
characteristics of prestressed piezoelectric ceramics in langevin transducers},
author={Scheidemann, Claus and Hemsel, Tobias and Sextro, Walter}, year={2025}
}'
chicago: Scheidemann, Claus, Tobias Hemsel, and Walter Sextro. “Time Dependent Material
Characteristics of Prestressed Piezoelectric Ceramics in Langevin Transducers,”
2025.
ieee: C. Scheidemann, T. Hemsel, and W. Sextro, “Time dependent material characteristics
of prestressed piezoelectric ceramics in langevin transducers,” presented at the
22nd International Workshop on Piezoelectric Materials and Applications in Actuators
(IWPMA), Vilnius, Lithuania, 2025.
mla: Scheidemann, Claus, et al. Time Dependent Material Characteristics of Prestressed
Piezoelectric Ceramics in Langevin Transducers. 2025.
short: 'C. Scheidemann, T. Hemsel, W. Sextro, in: 2025.'
conference:
end_date: 2025-07-3
location: Vilnius, Lithuania
name: 22nd International Workshop on Piezoelectric Materials and Applications in
Actuators (IWPMA)
start_date: 2025-07-1
date_created: 2025-10-08T14:22:32Z
date_updated: 2026-03-02T10:59:53Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: open_access
content_type: application/pdf
creator: hemsel
date_created: 2026-01-30T11:07:48Z
date_updated: 2026-03-02T10:59:53Z
file_id: '63817'
file_name: SHS25_IWPMA_2025.pdf
file_size: 644147
relation: main_file
file_date_updated: 2026-03-02T10:59:53Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
status: public
title: Time dependent material characteristics of prestressed piezoelectric ceramics
in langevin transducers
type: conference
user_id: '210'
year: '2025'
...
---
_id: '61757'
author:
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Julius
full_name: Porzenheim, Julius
last_name: Porzenheim
- 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: 'Scheidemann C, Porzenheim J, Hemsel T, Sextro W. Investigation of the Setting
Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers. In: ; 2025.'
apa: Scheidemann, C., Porzenheim, J., Hemsel, T., & Sextro, W. (2025). Investigation
of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers.
2025 International Congress on Ultrasonics (ICU), Paderborn, Germany.
bibtex: '@inproceedings{Scheidemann_Porzenheim_Hemsel_Sextro_2025, title={Investigation
of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers},
author={Scheidemann, Claus and Porzenheim, Julius and Hemsel, Tobias and Sextro,
Walter}, year={2025} }'
chicago: Scheidemann, Claus, Julius Porzenheim, Tobias Hemsel, and Walter Sextro.
“Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic
Transducers,” 2025.
ieee: C. Scheidemann, J. Porzenheim, T. Hemsel, and W. Sextro, “Investigation of
the Setting Behaviour of Mechanically Biased Piezoelectric Ultrasonic Transducers,”
presented at the 2025 International Congress on Ultrasonics (ICU), Paderborn,
Germany, 2025.
mla: Scheidemann, Claus, et al. Investigation of the Setting Behaviour of Mechanically
Biased Piezoelectric Ultrasonic Transducers. 2025.
short: 'C. Scheidemann, J. Porzenheim, T. Hemsel, W. Sextro, in: 2025.'
conference:
end_date: 2025-09-25
location: Paderborn, Germany
name: 2025 International Congress on Ultrasonics (ICU)
start_date: 2025-09-21
date_created: 2025-10-08T14:33:44Z
date_updated: 2026-03-02T10:59:36Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: open_access
content_type: application/pdf
creator: hemsel
date_created: 2026-01-30T07:30:44Z
date_updated: 2026-03-02T10:59:36Z
file_id: '63816'
file_name: Sch25_ICU_2025.pdf
file_size: 783790
relation: main_file
file_date_updated: 2026-03-02T10:59:36Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
status: public
title: Investigation of the Setting Behaviour of Mechanically Biased Piezoelectric
Ultrasonic Transducers
type: conference
user_id: '210'
year: '2025'
...
---
_id: '62299'
author:
- first_name: Olga
full_name: Friesen, Olga
id: '44026'
last_name: Friesen
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Friesen O, Scheidemann C, Claes L, Hemsel T, Henning B. Sensitivity Analysis
and Material Parameter Estimation of a Pre-Stressed Langevin Transducer. In: 2025
International Congress on Ultrasonics. AMA Service GmbH; 2025:138–141. doi:10.5162/ultrasonic2025/a18-a4'
apa: Friesen, O., Scheidemann, C., Claes, L., Hemsel, T., & Henning, B. (2025).
Sensitivity Analysis and Material Parameter Estimation of a Pre-Stressed Langevin
Transducer. 2025 International Congress on Ultrasonics, 138–141. https://doi.org/10.5162/ultrasonic2025/a18-a4
bibtex: '@inproceedings{Friesen_Scheidemann_Claes_Hemsel_Henning_2025, place={Paderborn},
title={Sensitivity Analysis and Material Parameter Estimation of a Pre-Stressed
Langevin Transducer}, DOI={10.5162/ultrasonic2025/a18-a4},
booktitle={2025 International Congress on Ultrasonics}, publisher={AMA Service
GmbH}, author={Friesen, Olga and Scheidemann, Claus and Claes, Leander and Hemsel,
Tobias and Henning, Bernd}, year={2025}, pages={138–141} }'
chicago: 'Friesen, Olga, Claus Scheidemann, Leander Claes, Tobias Hemsel, and Bernd
Henning. “Sensitivity Analysis and Material Parameter Estimation of a Pre-Stressed
Langevin Transducer.” In 2025 International Congress on Ultrasonics, 138–141.
Paderborn: AMA Service GmbH, 2025. https://doi.org/10.5162/ultrasonic2025/a18-a4.'
ieee: 'O. Friesen, C. Scheidemann, L. Claes, T. Hemsel, and B. Henning, “Sensitivity
Analysis and Material Parameter Estimation of a Pre-Stressed Langevin Transducer,”
in 2025 International Congress on Ultrasonics, 2025, pp. 138–141, doi:
10.5162/ultrasonic2025/a18-a4.'
mla: Friesen, Olga, et al. “Sensitivity Analysis and Material Parameter Estimation
of a Pre-Stressed Langevin Transducer.” 2025 International Congress on Ultrasonics,
AMA Service GmbH, 2025, pp. 138–141, doi:10.5162/ultrasonic2025/a18-a4.
short: 'O. Friesen, C. Scheidemann, L. Claes, T. Hemsel, B. Henning, in: 2025 International
Congress on Ultrasonics, AMA Service GmbH, Paderborn, 2025, pp. 138–141.'
date_created: 2025-11-25T12:23:06Z
date_updated: 2026-01-05T08:00:48Z
department:
- _id: '49'
- _id: '151'
doi: 10.5162/ultrasonic2025/a18-a4
language:
- iso: eng
page: 138–141
place: Paderborn
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
publication: 2025 International Congress on Ultrasonics
publisher: AMA Service GmbH
status: public
title: Sensitivity Analysis and Material Parameter Estimation of a Pre-Stressed Langevin
Transducer
type: conference
user_id: '11829'
year: '2025'
...
---
_id: '64803'
abstract:
- lang: eng
text: "Nowadays ultrasound technology is established in various fields of application
like industrial production or medical technology. Besides high power ultrasound
applications like ultrasonic cleaning and ultrasonic welding, which are often
not strongly restricted regarding their weight, costs, and construction space,
there are many applications in the low to medium power range like handheld surgical
instruments, medical inhalers, or ultrasonic cutters. For the latter there is
often a strong demand for low weight and construction space and low costs to be
competitive in mass production. Another challenge that arises from the RoHS-directive
[1] is, that new ultrasonic devices should avoid the use of lead-containing PZT-materials.
Against this background there is a demand for lead-free, small and lightweight
and cost-effective ultrasonic transducers.\r\nIn many of the above-mentioned applications,
pre-stressed Bolted-Langevine-Transducers (BLT) based on lead-containing PZT-materials
are established to generate ultrasonic vibrations. These are quite advantageous
in many ways and can be built tailored to each application and even for high power
of thousands of watts. But due to the required steps during their manufacturing
process (machining parts, assembly, pre-stressing, frequency tuning, …), these
transducers remain expensive. Furthermore, due to the operation in resonance,
the construction space of these transducers is linked to their wavelength and
cannot be reduced remarkably.\r\nFor these reasons, our aim is to present an innovative
lead-free ultrasonic transducer for low to medium power applications, that is
based on bending vibrations instead of longitudinal vibrations. This design enables
to build very small transducers. Furthermore, due to their simple construction,
these transducers can be built at low manufacturing costs and are well suited
for industrial mass production. The use of lead-free piezoelectric materials makes
this transducer design ready for future applications.\r\nIn our contribution we
will present the model-based design of a lead-free 30 kHz bending transducer for
applications up to 10 W. Furthermore, the comprehensive experimental analysis
of this transducer-prototype in applications like mist generation or ultrasonic
drilling will be presented. The results will be compared to a PZT-based bending
transducer and a classical BLT to show the potential and limits of these kind
of transducers and lead-free materials.\r\n"
author:
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Walter
full_name: Littmann, Walter
last_name: Littmann
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
citation:
ama: 'Bornmann P, Littmann W, Scheidemann C, Hemsel T. Innovative lead-free ultrasonic
bending transducers for low to medium power applications. In: ; 2025.'
apa: Bornmann, P., Littmann, W., Scheidemann, C., & Hemsel, T. (2025). Innovative
lead-free ultrasonic bending transducers for low to medium power applications.
International Congress on Ultrasonics (ICU), Paderborn, Germany.
bibtex: '@inproceedings{Bornmann_Littmann_Scheidemann_Hemsel_2025, title={Innovative
lead-free ultrasonic bending transducers for low to medium power applications},
author={Bornmann, Peter and Littmann, Walter and Scheidemann, Claus and Hemsel,
Tobias}, year={2025} }'
chicago: Bornmann, Peter, Walter Littmann, Claus Scheidemann, and Tobias Hemsel.
“Innovative Lead-Free Ultrasonic Bending Transducers for Low to Medium Power Applications,”
2025.
ieee: P. Bornmann, W. Littmann, C. Scheidemann, and T. Hemsel, “Innovative lead-free
ultrasonic bending transducers for low to medium power applications,” presented
at the International Congress on Ultrasonics (ICU), Paderborn, Germany, 2025.
mla: Bornmann, Peter, et al. Innovative Lead-Free Ultrasonic Bending Transducers
for Low to Medium Power Applications. 2025.
short: 'P. Bornmann, W. Littmann, C. Scheidemann, T. Hemsel, in: 2025.'
conference:
end_date: 2025-09-25
location: Paderborn, Germany
name: International Congress on Ultrasonics (ICU)
start_date: 2025-09-21
date_created: 2026-03-02T11:35:33Z
date_updated: 2026-04-02T12:47:18Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: closed
content_type: application/pdf
creator: hemsel
date_created: 2026-04-02T12:46:09Z
date_updated: 2026-04-02T12:46:09Z
file_id: '65354'
file_name: ICU_2025_Bornmann.pdf
file_size: 1878995
relation: main_file
success: 1
file_date_updated: 2026-04-02T12:46:09Z
has_accepted_license: '1'
language:
- iso: eng
status: public
title: Innovative lead-free ultrasonic bending transducers for low to medium power
applications
type: conference
user_id: '210'
year: '2025'
...
---
_id: '64802'
abstract:
- lang: eng
text: Power ultrasonic actuators are used in various industrial, automotive and
medical applications. Examples are ultrasonic welding of plastics or metal, surgery
processes like cutting of tissue or bone, and the excitation of cavitation in
liquids for ultrasonic cleaning. From a physical point of view, many of these
processes are characterised by non-constant damping conditions for the ultrasonic
actuators, since the systems need to be driven in unloaded as well as in high-loaded
states. To get high power output, the piezoelectric actuators are usually driven
in or near resonance at precisely defined vibration amplitudes. This is a quite
complicated task especially if cost or mass optimized PZT transducers are used
or if lead-free piezoelectric ceramics are applied to replace lead-containing
materials. In particular the sudden change between loading states is very challenging
for electronic excitation and control. The present contribution gives insight
into typical problems that may arise in context with sudden load-changes during
operation, e.g. uncontrolled jumps in voltage and velocity amplitudes. Measurements
on ultrasonic power actuators being abruptly immersed into water at high amplitude
are discussed for illustration. Observations during spontaneous load-changes are
explained, and it is shown that several problems may be defused by driving the
actuators in antiresonance or using a particular driving point in-between resonance
and antiresonance (“falling edge control”). The different control strategies are
investigated always using just one single hardware.
author:
- first_name: Walter
full_name: Littmann, Walter
last_name: Littmann
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
citation:
ama: 'Littmann W, Bornmann P, Hemsel T, Scheidemann C. Power ultrasonic actuators
with suddenly changing loads: How to control the amplitudes in resonance, antiresonance,
or in-between. In: ; 2025.'
apa: 'Littmann, W., Bornmann, P., Hemsel, T., & Scheidemann, C. (2025). Power
ultrasonic actuators with suddenly changing loads: How to control the amplitudes
in resonance, antiresonance, or in-between. International Conference on Ultrasonics
(ICU), Paderborn, Germany.'
bibtex: '@inproceedings{Littmann_Bornmann_Hemsel_Scheidemann_2025, title={Power
ultrasonic actuators with suddenly changing loads: How to control the amplitudes
in resonance, antiresonance, or in-between}, author={Littmann, Walter and Bornmann,
Peter and Hemsel, Tobias and Scheidemann, Claus}, year={2025} }'
chicago: 'Littmann, Walter, Peter Bornmann, Tobias Hemsel, and Claus Scheidemann.
“Power Ultrasonic Actuators with Suddenly Changing Loads: How to Control the Amplitudes
in Resonance, Antiresonance, or in-Between,” 2025.'
ieee: 'W. Littmann, P. Bornmann, T. Hemsel, and C. Scheidemann, “Power ultrasonic
actuators with suddenly changing loads: How to control the amplitudes in resonance,
antiresonance, or in-between,” presented at the International Conference on Ultrasonics
(ICU), Paderborn, Germany, 2025.'
mla: 'Littmann, Walter, et al. Power Ultrasonic Actuators with Suddenly Changing
Loads: How to Control the Amplitudes in Resonance, Antiresonance, or in-Between.
2025.'
short: 'W. Littmann, P. Bornmann, T. Hemsel, C. Scheidemann, in: 2025.'
conference:
end_date: 2025-09-25
location: Paderborn, Germany
name: International Conference on Ultrasonics (ICU)
start_date: 2025-09-21
date_created: 2026-03-02T11:19:46Z
date_updated: 2026-04-02T12:45:42Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: closed
content_type: application/pdf
creator: hemsel
date_created: 2026-04-02T12:41:08Z
date_updated: 2026-04-02T12:41:08Z
file_id: '65353'
file_name: ICU_2025_Littmann.pdf
file_size: 2522135
relation: main_file
success: 1
file_date_updated: 2026-04-02T12:41:08Z
has_accepted_license: '1'
language:
- iso: eng
status: public
title: 'Power ultrasonic actuators with suddenly changing loads: How to control the
amplitudes in resonance, antiresonance, or in-between'
type: conference
user_id: '210'
year: '2025'
...
---
_id: '57467'
abstract:
- lang: eng
text: Additive manufacturing of metallic components often results in the
formation of columnar grain structures aligned along the build direction. These
elongated grains can introduce anisotropy, negatively impacting the mechanical
properties of the components. This study aimed to achieve controlled solidification
with a fine-grained microstructure to enhance the mechanical performance of printed
parts. Stainless steel 316L was used as the test material. High-intensity ultrasound
was applied during the direct energy deposition (DED) process to inhibit the formation
of columnar grains. The investigation emphasized the importance of amplitude changes
of the ultrasound wave as the system’s geometry continuously evolves with the
addition of multiple layers and assessed how these changes influence the grain
size and distribution. Initial tests revealed significant amplitude fluctuations
during layer deposition, highlighting the impact of layer deposition on process
uniformity. The mechanical results demonstrated that the application of ultrasound
effectively refined the grain structure, leading to a 15% increase in tensile
strength compared to conventionally additively manufactured samples.
article_number: '1001'
author:
- first_name: Dennis
full_name: Lehnert, Dennis
id: '90491'
last_name: Lehnert
- first_name: Christian
full_name: Bödger, Christian
id: '93904'
last_name: Bödger
- first_name: Philipp
full_name: Pabel, Philipp
id: '67374'
last_name: Pabel
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Stefan
full_name: Gnaase, Stefan
id: '25730'
last_name: Gnaase
- first_name: David
full_name: Kostka, David
last_name: Kostka
- first_name: Thomas
full_name: Tröster, Thomas
id: '553'
last_name: Tröster
citation:
ama: Lehnert D, Bödger C, Pabel P, et al. The Influence of Ultrasonic Irradiation
of a 316L Weld Pool Produced by DED on the Mechanical Properties of the Produced
Component. Crystals. 2024;14(11). doi:10.3390/cryst14111001
apa: Lehnert, D., Bödger, C., Pabel, P., Scheidemann, C., Hemsel, T., Gnaase, S.,
Kostka, D., & Tröster, T. (2024). The Influence of Ultrasonic Irradiation
of a 316L Weld Pool Produced by DED on the Mechanical Properties of the Produced
Component. Crystals, 14(11), Article 1001. https://doi.org/10.3390/cryst14111001
bibtex: '@article{Lehnert_Bödger_Pabel_Scheidemann_Hemsel_Gnaase_Kostka_Tröster_2024,
title={The Influence of Ultrasonic Irradiation of a 316L Weld Pool Produced by
DED on the Mechanical Properties of the Produced Component}, volume={14}, DOI={10.3390/cryst14111001}, number={111001},
journal={Crystals}, publisher={MDPI AG}, author={Lehnert, Dennis and Bödger, Christian
and Pabel, Philipp and Scheidemann, Claus and Hemsel, Tobias and Gnaase, Stefan
and Kostka, David and Tröster, Thomas}, year={2024} }'
chicago: Lehnert, Dennis, Christian Bödger, Philipp Pabel, Claus Scheidemann, Tobias
Hemsel, Stefan Gnaase, David Kostka, and Thomas Tröster. “The Influence of Ultrasonic
Irradiation of a 316L Weld Pool Produced by DED on the Mechanical Properties of
the Produced Component.” Crystals 14, no. 11 (2024). https://doi.org/10.3390/cryst14111001.
ieee: 'D. Lehnert et al., “The Influence of Ultrasonic Irradiation of a 316L
Weld Pool Produced by DED on the Mechanical Properties of the Produced Component,”
Crystals, vol. 14, no. 11, Art. no. 1001, 2024, doi: 10.3390/cryst14111001.'
mla: Lehnert, Dennis, et al. “The Influence of Ultrasonic Irradiation of a 316L
Weld Pool Produced by DED on the Mechanical Properties of the Produced Component.”
Crystals, vol. 14, no. 11, 1001, MDPI AG, 2024, doi:10.3390/cryst14111001.
short: D. Lehnert, C. Bödger, P. Pabel, C. Scheidemann, T. Hemsel, S. Gnaase, D.
Kostka, T. Tröster, Crystals 14 (2024).
date_created: 2024-11-28T08:45:06Z
date_updated: 2026-02-23T08:07:37Z
ddc:
- '670'
department:
- _id: '149'
- _id: '321'
- _id: '9'
doi: 10.3390/cryst14111001
file:
- access_level: closed
content_type: application/pdf
creator: dlehnert
date_created: 2024-11-28T08:52:48Z
date_updated: 2024-11-28T08:52:48Z
file_id: '57470'
file_name: crystals-14-01001-v2 (4).pdf
file_size: 5779744
relation: main_file
success: 1
file_date_updated: 2024-11-28T08:52:48Z
has_accepted_license: '1'
intvolume: ' 14'
issue: '11'
language:
- iso: eng
publication: Crystals
publication_identifier:
issn:
- 2073-4352
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: The Influence of Ultrasonic Irradiation of a 316L Weld Pool Produced by DED
on the Mechanical Properties of the Produced Component
type: journal_article
user_id: '93904'
volume: 14
year: '2024'
...
---
_id: '61756'
author:
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- 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: 'Scheidemann C, Hemsel T, Sextro W. Characteristic behavior of lead-free and
lead-containing piezo ring ceramics in ultrasonic transducers. In: ; 2024.'
apa: Scheidemann, C., Hemsel, T., & Sextro, W. (2024). Characteristic behavior
of lead-free and lead-containing piezo ring ceramics in ultrasonic transducers.
21nd International Workshop on Piezoelectric Materials and Applications in Actuators
(IWPMA), Hannover, Germany.
bibtex: '@inproceedings{Scheidemann_Hemsel_Sextro_2024, title={Characteristic behavior
of lead-free and lead-containing piezo ring ceramics in ultrasonic transducers},
author={Scheidemann, Claus and Hemsel, Tobias and Sextro, Walter}, year={2024}
}'
chicago: Scheidemann, Claus, Tobias Hemsel, and Walter Sextro. “Characteristic Behavior
of Lead-Free and Lead-Containing Piezo Ring Ceramics in Ultrasonic Transducers,”
2024.
ieee: C. Scheidemann, T. Hemsel, and W. Sextro, “Characteristic behavior of lead-free
and lead-containing piezo ring ceramics in ultrasonic transducers,” presented
at the 21nd International Workshop on Piezoelectric Materials and Applications
in Actuators (IWPMA), Hannover, Germany, 2024.
mla: Scheidemann, Claus, et al. Characteristic Behavior of Lead-Free and Lead-Containing
Piezo Ring Ceramics in Ultrasonic Transducers. 2024.
short: 'C. Scheidemann, T. Hemsel, W. Sextro, in: 2024.'
conference:
end_date: 2024-07-26
location: Hannover, Germany
name: 21nd International Workshop on Piezoelectric Materials and Applications in
Actuators (IWPMA)
start_date: 2024-07-22
date_created: 2025-10-08T14:28:33Z
date_updated: 2026-03-02T11:00:14Z
ddc:
- '620'
department:
- _id: '151'
file:
- access_level: open_access
content_type: application/pdf
creator: hemsel
date_created: 2026-01-30T14:50:06Z
date_updated: 2026-03-02T11:00:13Z
file_id: '63820'
file_name: IWPMA_2024_Scheidemann.pdf
file_size: 1984385
relation: main_file
file_date_updated: 2026-03-02T11:00:13Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
status: public
title: Characteristic behavior of lead-free and lead-containing piezo ring ceramics
in ultrasonic transducers
type: conference
user_id: '210'
year: '2024'
...
---
_id: '56834'
author:
- first_name: Olga
full_name: Friesen, Olga
id: '44026'
last_name: Friesen
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Nadine
full_name: Feldmann, Nadine
id: '23082'
last_name: Feldmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Friesen O, Claes L, Scheidemann C, Feldmann N, Hemsel T, Henning B. Estimation
of temperature-dependent piezoelectric material parameters using ring-shaped specimens.
In: 2023 International Congress on Ultrasonics, Beijing, China. Vol 2822.
IOP Publishing; 2024:012125. doi:10.1088/1742-6596/2822/1/012125'
apa: Friesen, O., Claes, L., Scheidemann, C., Feldmann, N., Hemsel, T., & Henning,
B. (2024). Estimation of temperature-dependent piezoelectric material parameters
using ring-shaped specimens. 2023 International Congress on Ultrasonics, Beijing,
China, 2822, 012125. https://doi.org/10.1088/1742-6596/2822/1/012125
bibtex: '@inproceedings{Friesen_Claes_Scheidemann_Feldmann_Hemsel_Henning_2024,
title={Estimation of temperature-dependent piezoelectric material parameters using
ring-shaped specimens}, volume={2822}, DOI={10.1088/1742-6596/2822/1/012125},
booktitle={2023 International Congress on Ultrasonics, Beijing, China}, publisher={IOP
Publishing}, author={Friesen, Olga and Claes, Leander and Scheidemann, Claus and
Feldmann, Nadine and Hemsel, Tobias and Henning, Bernd}, year={2024}, pages={012125}
}'
chicago: Friesen, Olga, Leander Claes, Claus Scheidemann, Nadine Feldmann, Tobias
Hemsel, and Bernd Henning. “Estimation of Temperature-Dependent Piezoelectric
Material Parameters Using Ring-Shaped Specimens.” In 2023 International Congress
on Ultrasonics, Beijing, China, 2822:012125. IOP Publishing, 2024. https://doi.org/10.1088/1742-6596/2822/1/012125.
ieee: 'O. Friesen, L. Claes, C. Scheidemann, N. Feldmann, T. Hemsel, and B. Henning,
“Estimation of temperature-dependent piezoelectric material parameters using ring-shaped
specimens,” in 2023 International Congress on Ultrasonics, Beijing, China,
2024, vol. 2822, p. 012125, doi: 10.1088/1742-6596/2822/1/012125.'
mla: Friesen, Olga, et al. “Estimation of Temperature-Dependent Piezoelectric Material
Parameters Using Ring-Shaped Specimens.” 2023 International Congress on Ultrasonics,
Beijing, China, vol. 2822, IOP Publishing, 2024, p. 012125, doi:10.1088/1742-6596/2822/1/012125.
short: 'O. Friesen, L. Claes, C. Scheidemann, N. Feldmann, T. Hemsel, B. Henning,
in: 2023 International Congress on Ultrasonics, Beijing, China, IOP Publishing,
2024, p. 012125.'
date_created: 2024-10-31T07:59:01Z
date_updated: 2026-01-05T07:58:55Z
department:
- _id: '49'
doi: 10.1088/1742-6596/2822/1/012125
intvolume: ' 2822'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://iopscience.iop.org/article/10.1088/1742-6596/2822/1/012125
oa: '1'
page: '012125'
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
publication: 2023 International Congress on Ultrasonics, Beijing, China
publication_identifier:
issn:
- 1742-6596
publisher: IOP Publishing
status: public
title: Estimation of temperature-dependent piezoelectric material parameters using
ring-shaped specimens
type: conference
user_id: '11829'
volume: 2822
year: '2024'
...
---
_id: '51119'
author:
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Oliver Ernst Caspar
full_name: Hagedorn, Oliver Ernst Caspar
id: '53321'
last_name: Hagedorn
- 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: 'Scheidemann C, Hagedorn OEC, Hemsel T, Sextro W. Experimental Investigation
of Bond Formation and Wire Deformation in the Ultrasonic Wire Bonding Process.
In: ; 2023.'
apa: Scheidemann, C., Hagedorn, O. E. C., Hemsel, T., & Sextro, W. (2023). Experimental
Investigation of Bond Formation and Wire Deformation in the Ultrasonic Wire Bonding
Process. International Conference on Functional Materials & Devices 2023
(ICFMD 2023), Jeju, Korea.
bibtex: '@inproceedings{Scheidemann_Hagedorn_Hemsel_Sextro_2023, title={Experimental
Investigation of Bond Formation and Wire Deformation in the Ultrasonic Wire Bonding
Process}, author={Scheidemann, Claus and Hagedorn, Oliver Ernst Caspar and Hemsel,
Tobias and Sextro, Walter}, year={2023} }'
chicago: Scheidemann, Claus, Oliver Ernst Caspar Hagedorn, Tobias Hemsel, and Walter
Sextro. “Experimental Investigation of Bond Formation and Wire Deformation in
the Ultrasonic Wire Bonding Process,” 2023.
ieee: C. Scheidemann, O. E. C. Hagedorn, T. Hemsel, and W. Sextro, “Experimental
Investigation of Bond Formation and Wire Deformation in the Ultrasonic Wire Bonding
Process,” presented at the International Conference on Functional Materials &
Devices 2023 (ICFMD 2023), Jeju, Korea, 2023.
mla: Scheidemann, Claus, et al. Experimental Investigation of Bond Formation
and Wire Deformation in the Ultrasonic Wire Bonding Process. 2023.
short: 'C. Scheidemann, O.E.C. Hagedorn, T. Hemsel, W. Sextro, in: 2023.'
conference:
end_date: 2023-11-03
location: Jeju, Korea
name: International Conference on Functional Materials & Devices 2023 (ICFMD 2023)
start_date: 2023-10-31
date_created: 2024-02-01T16:03:41Z
date_updated: 2024-02-01T16:04:33Z
department:
- _id: '151'
language:
- iso: eng
status: public
title: Experimental Investigation of Bond Formation and Wire Deformation in the Ultrasonic
Wire Bonding Process
type: conference_abstract
user_id: '38259'
year: '2023'
...
---
_id: '47234'
author:
- first_name: Birte
full_name: Sehlmeyer, Birte
last_name: Sehlmeyer
- first_name: 'Rebecca '
full_name: 'Kampmann, Rebecca '
last_name: Kampmann
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: 'Mathias '
full_name: 'Getzlaff, Mathias '
last_name: Getzlaff
citation:
ama: 'Sehlmeyer B, Kampmann R, Scheidemann C, Hemsel T, Getzlaff M. Burst Mode of
Ultrasonic Resonant Oscillations for Stimulation and Destruction of Tumor Cells.
In: Deutsche Physikalische Gesellschaft e. V., ed. Frühjahrstagung 2023, Sektion
Kondensierte Materie (SKM). ; 2023.'
apa: Sehlmeyer, B., Kampmann, R., Scheidemann, C., Hemsel, T., & Getzlaff, M.
(2023). Burst Mode of Ultrasonic Resonant Oscillations for Stimulation and Destruction
of Tumor Cells. In Deutsche Physikalische Gesellschaft e. V. (Ed.), Frühjahrstagung
2023, Sektion Kondensierte Materie (SKM).
bibtex: '@inproceedings{Sehlmeyer_Kampmann_Scheidemann_Hemsel_Getzlaff_2023, title={Burst
Mode of Ultrasonic Resonant Oscillations for Stimulation and Destruction of Tumor
Cells}, booktitle={Frühjahrstagung 2023, Sektion Kondensierte Materie (SKM)},
author={Sehlmeyer, Birte and Kampmann, Rebecca and Scheidemann, Claus and Hemsel,
Tobias and Getzlaff, Mathias }, editor={Deutsche Physikalische Gesellschaft e.
V.}, year={2023} }'
chicago: Sehlmeyer, Birte, Rebecca Kampmann, Claus Scheidemann, Tobias Hemsel,
and Mathias Getzlaff. “Burst Mode of Ultrasonic Resonant Oscillations for Stimulation
and Destruction of Tumor Cells.” In Frühjahrstagung 2023, Sektion Kondensierte
Materie (SKM), edited by Deutsche Physikalische Gesellschaft e. V., 2023.
ieee: B. Sehlmeyer, R. Kampmann, C. Scheidemann, T. Hemsel, and M. Getzlaff, “Burst
Mode of Ultrasonic Resonant Oscillations for Stimulation and Destruction of Tumor
Cells,” in Frühjahrstagung 2023, Sektion Kondensierte Materie (SKM), Dresden,
2023.
mla: Sehlmeyer, Birte, et al. “Burst Mode of Ultrasonic Resonant Oscillations for
Stimulation and Destruction of Tumor Cells.” Frühjahrstagung 2023, Sektion
Kondensierte Materie (SKM), edited by Deutsche Physikalische Gesellschaft
e. V., 2023.
short: 'B. Sehlmeyer, R. Kampmann, C. Scheidemann, T. Hemsel, M. Getzlaff, in: Deutsche
Physikalische Gesellschaft e. V. (Ed.), Frühjahrstagung 2023, Sektion Kondensierte
Materie (SKM), 2023.'
conference:
end_date: 2023-03-31
location: Dresden
name: 'Deutsche Physikalische Gesellschaft e. V., Frühjahrstagung 2023, Sektion
Kondensierte Marterie (SKM) '
start_date: 2023-03-26
corporate_editor:
- Deutsche Physikalische Gesellschaft e. V.
date_created: 2023-09-22T12:13:25Z
date_updated: 2023-09-28T09:58:48Z
department:
- _id: '151'
language:
- iso: eng
publication: Frühjahrstagung 2023, Sektion Kondensierte Materie (SKM)
related_material:
link:
- relation: confirmation
url: https://www.dpg-verhandlungen.de/year/2023/conference/skm/part/bp/session/28/contribution/27
status: public
title: Burst Mode of Ultrasonic Resonant Oscillations for Stimulation and Destruction
of Tumor Cells
type: conference_abstract
user_id: '210'
year: '2023'
...
---
_id: '47235'
author:
- first_name: Rebecca
full_name: Kampmann, Rebecca
last_name: Kampmann
- first_name: Birte
full_name: Sehlmeyer, Birte
last_name: Sehlmeyer
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Mathias
full_name: Getzlaff, Mathias
last_name: Getzlaff
citation:
ama: 'Kampmann R, Sehlmeyer B, Scheidemann C, Hemsel T, Getzlaff M. Burst Mode Characteristics
of an Ultrasonic Transducer for Treatment of Cancer Cells. In: Deutsche Physikalische
Gesellschaft e. V., ed. Frühjahrstagung 2023, Sektion Kondensierte Marterie
(SKM). ; 2023.'
apa: Kampmann, R., Sehlmeyer, B., Scheidemann, C., Hemsel, T., & Getzlaff, M.
(2023). Burst Mode Characteristics of an Ultrasonic Transducer for Treatment of
Cancer Cells. In Deutsche Physikalische Gesellschaft e. V. (Ed.), Frühjahrstagung
2023, Sektion Kondensierte Marterie (SKM).
bibtex: '@inproceedings{Kampmann_Sehlmeyer_Scheidemann_Hemsel_Getzlaff_2023, title={Burst
Mode Characteristics of an Ultrasonic Transducer for Treatment of Cancer Cells},
booktitle={Frühjahrstagung 2023, Sektion Kondensierte Marterie (SKM)}, author={Kampmann,
Rebecca and Sehlmeyer, Birte and Scheidemann, Claus and Hemsel, Tobias and Getzlaff,
Mathias}, editor={Deutsche Physikalische Gesellschaft e. V.}, year={2023} }'
chicago: Kampmann, Rebecca, Birte Sehlmeyer, Claus Scheidemann, Tobias Hemsel, and
Mathias Getzlaff. “Burst Mode Characteristics of an Ultrasonic Transducer for
Treatment of Cancer Cells.” In Frühjahrstagung 2023, Sektion Kondensierte Marterie
(SKM), edited by Deutsche Physikalische Gesellschaft e. V., 2023.
ieee: R. Kampmann, B. Sehlmeyer, C. Scheidemann, T. Hemsel, and M. Getzlaff, “Burst
Mode Characteristics of an Ultrasonic Transducer for Treatment of Cancer Cells,”
in Frühjahrstagung 2023, Sektion Kondensierte Marterie (SKM), Dresden,
2023.
mla: Kampmann, Rebecca, et al. “Burst Mode Characteristics of an Ultrasonic Transducer
for Treatment of Cancer Cells.” Frühjahrstagung 2023, Sektion Kondensierte
Marterie (SKM), edited by Deutsche Physikalische Gesellschaft e. V., 2023.
short: 'R. Kampmann, B. Sehlmeyer, C. Scheidemann, T. Hemsel, M. Getzlaff, in: Deutsche
Physikalische Gesellschaft e. V. (Ed.), Frühjahrstagung 2023, Sektion Kondensierte
Marterie (SKM), 2023.'
conference:
end_date: 2023-03-31
location: Dresden
name: Deutsche Physikalische Gesellschaft e. V., Frühjahrstagung 2023, Sektion Kondensierte
Marterie (SKM)
start_date: 2023-03-26
corporate_editor:
- Deutsche Physikalische Gesellschaft e. V.
date_created: 2023-09-22T12:19:07Z
date_updated: 2023-09-28T09:54:55Z
department:
- _id: '151'
language:
- iso: eng
publication: Frühjahrstagung 2023, Sektion Kondensierte Marterie (SKM)
related_material:
link:
- relation: confirmation
url: https://www.dpg-verhandlungen.de/year/2023/conference/skm/part/bp/session/28/contribution/26
status: public
title: Burst Mode Characteristics of an Ultrasonic Transducer for Treatment of Cancer
Cells
type: conference_abstract
user_id: '210'
year: '2023'
...
---
_id: '51117'
author:
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Olga
full_name: Friesen, Olga
id: '44026'
last_name: Friesen
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Scheidemann C, Hemsel T, Friesen O, Claes L, Sextro W. Influence of Temperature
and Pre-Stress on the Piezoelectric Material Behavior of Ring-Shaped Ceramics.
In: ; 2023.'
apa: Scheidemann, C., Hemsel, T., Friesen, O., Claes, L., & Sextro, W. (2023).
Influence of Temperature and Pre-Stress on the Piezoelectric Material Behavior
of Ring-Shaped Ceramics. 7th International Conference on Advanced Electromaterials
(ICAE 2023), Jeju, Korea.
bibtex: '@inproceedings{Scheidemann_Hemsel_Friesen_Claes_Sextro_2023, title={Influence
of Temperature and Pre-Stress on the Piezoelectric Material Behavior of Ring-Shaped
Ceramics}, author={Scheidemann, Claus and Hemsel, Tobias and Friesen, Olga and
Claes, Leander and Sextro, Walter}, year={2023} }'
chicago: Scheidemann, Claus, Tobias Hemsel, Olga Friesen, Leander Claes, and Walter
Sextro. “Influence of Temperature and Pre-Stress on the Piezoelectric Material
Behavior of Ring-Shaped Ceramics,” 2023.
ieee: C. Scheidemann, T. Hemsel, O. Friesen, L. Claes, and W. Sextro, “Influence
of Temperature and Pre-Stress on the Piezoelectric Material Behavior of Ring-Shaped
Ceramics,” presented at the 7th International Conference on Advanced Electromaterials
(ICAE 2023), Jeju, Korea, 2023.
mla: Scheidemann, Claus, et al. Influence of Temperature and Pre-Stress on the
Piezoelectric Material Behavior of Ring-Shaped Ceramics. 2023.
short: 'C. Scheidemann, T. Hemsel, O. Friesen, L. Claes, W. Sextro, in: 2023.'
conference:
end_date: 2023-11-03
location: Jeju, Korea
name: 7th International Conference on Advanced Electromaterials (ICAE 2023)
start_date: 2023-10-31
date_created: 2024-02-01T15:55:44Z
date_updated: 2026-03-02T10:59:13Z
ddc:
- '620'
department:
- _id: '151'
- _id: '49'
file:
- access_level: open_access
content_type: application/pdf
creator: hemsel
date_created: 2026-01-30T07:15:31Z
date_updated: 2026-03-02T10:59:13Z
file_id: '63815'
file_name: Sch23_ICAE_2023.pdf
file_size: 608243
relation: main_file
file_date_updated: 2026-03-02T10:59:13Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
project:
- _id: '245'
name: 'FOR 5208: Modellbasierte Bestimmung nichtlinearer Eigenschaften von Piezokeramiken
für Leistungsschallanwendungen (NEPTUN)'
status: public
title: Influence of Temperature and Pre-Stress on the Piezoelectric Material Behavior
of Ring-Shaped Ceramics
type: conference
user_id: '210'
year: '2023'
...
---
_id: '52045'
author:
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- 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: Scheidemann C, Hemsel T, Sextro W. Modellbasierte Ermittlung optimaler Prozessparameter
für neuartige Ultraschallbondverbindungen. LibreCat University; 2022. doi:10.2314/KXP:1879655276
apa: Scheidemann, C., Hemsel, T., & Sextro, W. (2022). Modellbasierte Ermittlung
optimaler Prozessparameter für neuartige Ultraschallbondverbindungen. LibreCat
University. https://doi.org/10.2314/KXP:1879655276
bibtex: '@book{Scheidemann_Hemsel_Sextro_2022, title={Modellbasierte Ermittlung
optimaler Prozessparameter für neuartige Ultraschallbondverbindungen}, DOI={10.2314/KXP:1879655276}, publisher={LibreCat
University}, author={Scheidemann, Claus and Hemsel, Tobias and Sextro, Walter},
year={2022} }'
chicago: Scheidemann, Claus, Tobias Hemsel, and Walter Sextro. Modellbasierte
Ermittlung optimaler Prozessparameter für neuartige Ultraschallbondverbindungen.
LibreCat University, 2022. https://doi.org/10.2314/KXP:1879655276.
ieee: C. Scheidemann, T. Hemsel, and W. Sextro, Modellbasierte Ermittlung optimaler
Prozessparameter für neuartige Ultraschallbondverbindungen. LibreCat University,
2022.
mla: Scheidemann, Claus, et al. Modellbasierte Ermittlung optimaler Prozessparameter
für neuartige Ultraschallbondverbindungen. LibreCat University, 2022, doi:10.2314/KXP:1879655276.
short: C. Scheidemann, T. Hemsel, W. Sextro, Modellbasierte Ermittlung optimaler
Prozessparameter für neuartige Ultraschallbondverbindungen, LibreCat University,
2022.
date_created: 2024-02-26T21:26:35Z
date_updated: 2024-02-26T21:35:03Z
department:
- _id: '151'
doi: 10.2314/KXP:1879655276
language:
- iso: ger
publisher: LibreCat University
related_material:
link:
- relation: confirmation
url: https://www.tib.eu/de/suchen?tx_tibsearch_search%5Baction%5D=download&tx_tibsearch_search%5Bcontroller%5D=Download&tx_tibsearch_search%5Bdocid%5D=TIBKAT%3A1879655276&cHash=bf2cba5ff8f46a376ce5ef59242c95e2#download-mark
status: public
title: Modellbasierte Ermittlung optimaler Prozessparameter für neuartige Ultraschallbondverbindungen
type: report
user_id: '38259'
year: '2022'
...
---
_id: '34104'
abstract:
- lang: eng
text: 'ue to the constantly growing energy demand of power electronics and the need
to reduce the size of electronic components like power modules for e-mobility,
new challenges arise for ultrasonic wire bonding: the electrical connection must
endure higher thermal and mechanical stress while the connecting partners become
more sensitive or require more energy to get bonded. Past investigations have
shown already that multi-dimensional ultrasonic bonding and welding yield the
same or even better bond quality while reducing the load on the components. This
contribution is intended to show whether multidi-mensional thick wire bonding
is a promising concept to over-come the new challenges. The focus is on experimental
investi-gations of different bond tool trajectories in ultrasonic wire bonding
of aluminum and copper wire on DCB''s and chips. The bond quality is analyzed
by shear tests, microsections and, in the case of aluminum bonding, by a new machine
learning method for an objective automated evaluation of the sheared area.'
author:
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Olaf
full_name: Kirsch, Olaf
last_name: Kirsch
- 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: 'Scheidemann C, Kirsch O, Hemsel T, Sextro W. Experimental Investigation of
Multidimensional Ultrasonic Heavy Wire Bonding. In: 2022 IEEE 9th Electronics
System-Integration Technology Conference (ESTC). IEEE; 2022. doi:10.1109/estc55720.2022.9939478'
apa: Scheidemann, C., Kirsch, O., Hemsel, T., & Sextro, W. (2022). Experimental
Investigation of Multidimensional Ultrasonic Heavy Wire Bonding. 2022 IEEE
9th Electronics System-Integration Technology Conference (ESTC). https://doi.org/10.1109/estc55720.2022.9939478
bibtex: '@inproceedings{Scheidemann_Kirsch_Hemsel_Sextro_2022, title={Experimental
Investigation of Multidimensional Ultrasonic Heavy Wire Bonding}, DOI={10.1109/estc55720.2022.9939478},
booktitle={2022 IEEE 9th Electronics System-Integration Technology Conference
(ESTC)}, publisher={IEEE}, author={Scheidemann, Claus and Kirsch, Olaf and Hemsel,
Tobias and Sextro, Walter}, year={2022} }'
chicago: Scheidemann, Claus, Olaf Kirsch, Tobias Hemsel, and Walter Sextro. “Experimental
Investigation of Multidimensional Ultrasonic Heavy Wire Bonding.” In 2022 IEEE
9th Electronics System-Integration Technology Conference (ESTC). IEEE, 2022.
https://doi.org/10.1109/estc55720.2022.9939478.
ieee: 'C. Scheidemann, O. Kirsch, T. Hemsel, and W. Sextro, “Experimental Investigation
of Multidimensional Ultrasonic Heavy Wire Bonding,” 2022, doi: 10.1109/estc55720.2022.9939478.'
mla: Scheidemann, Claus, et al. “Experimental Investigation of Multidimensional
Ultrasonic Heavy Wire Bonding.” 2022 IEEE 9th Electronics System-Integration
Technology Conference (ESTC), IEEE, 2022, doi:10.1109/estc55720.2022.9939478.
short: 'C. Scheidemann, O. Kirsch, T. Hemsel, W. Sextro, in: 2022 IEEE 9th Electronics
System-Integration Technology Conference (ESTC), IEEE, 2022.'
date_created: 2022-11-17T15:17:39Z
date_updated: 2023-09-22T12:24:18Z
department:
- _id: '151'
doi: 10.1109/estc55720.2022.9939478
language:
- iso: eng
publication: 2022 IEEE 9th Electronics System-Integration Technology Conference (ESTC)
publication_status: published
publisher: IEEE
quality_controlled: '1'
status: public
title: Experimental Investigation of Multidimensional Ultrasonic Heavy Wire Bonding
type: conference
user_id: '38259'
year: '2022'
...
---
_id: '25265'
abstract:
- lang: eng
text: "Waveguide-based methods can be used for the non-destructive determination
of acoustic material parameters. One of these methods is based on transmission
measurements of cylindrical polymeric specimens. Here, the experimental setup
consists of two transducers, which excite and receive the waveguide modes at the
faces of the cylinder. The measurement, as well as a forward model, are used to
determine material parameters of the polymeric specimen in an inverse approach.\r\n1-3
piezoelectric composites are used as an active element because they can be approximated
by a thickness vibration only. This allows an easy identification of Mason model
parameters to characterise the transducers’ vibration behaviour. \r\nHowever,
sensitivity analysis shows a high uncertainty in the determination of the mechanical
shear parameters due to the uniform excitation. To increase the sensitivity to
these shear motions, arbitrary excitations were investigated by means of numerical
simulation. \r\nIn order to be able to realise the determined optimal excitation,
new transducer prototypes were designed. By subdividing the electrodes of the
active element, for example, ring-shaped excitation is feasible. Furthermore,
it can be shown that modelling these transducers with a one-dimensional Mason
model is sufficient."
author:
- first_name: Dmitrij
full_name: Dreiling, Dmitrij
id: '32616'
last_name: Dreiling
- first_name: Dominik
full_name: Itner, Dominik
last_name: Itner
- first_name: Nadine
full_name: Feldmann, Nadine
id: '23082'
last_name: Feldmann
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Hauke
full_name: Gravenkamp, Hauke
last_name: Gravenkamp
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Dreiling D, Itner D, Feldmann N, Scheidemann C, Gravenkamp H, Henning B. Application
and modelling of ultrasonic transducers using 1-3 piezoelectric composites with
structured electrodes. In: Fortschritte Der Akustik - DAGA 2021. Deutsche
Gesellschaft für Akustik e.V. (DEGA); 2021.'
apa: Dreiling, D., Itner, D., Feldmann, N., Scheidemann, C., Gravenkamp, H., &
Henning, B. (2021). Application and modelling of ultrasonic transducers using
1-3 piezoelectric composites with structured electrodes. Fortschritte Der Akustik
- DAGA 2021. DAGA 2021 - 47. JAHRESTAGUNG FÜR AKUSTIK, Wien.
bibtex: '@inproceedings{Dreiling_Itner_Feldmann_Scheidemann_Gravenkamp_Henning_2021,
place={Wien}, title={Application and modelling of ultrasonic transducers using
1-3 piezoelectric composites with structured electrodes}, booktitle={Fortschritte
der Akustik - DAGA 2021}, publisher={Deutsche Gesellschaft für Akustik e.V. (DEGA)},
author={Dreiling, Dmitrij and Itner, Dominik and Feldmann, Nadine and Scheidemann,
Claus and Gravenkamp, Hauke and Henning, Bernd}, year={2021} }'
chicago: 'Dreiling, Dmitrij, Dominik Itner, Nadine Feldmann, Claus Scheidemann,
Hauke Gravenkamp, and Bernd Henning. “Application and Modelling of Ultrasonic
Transducers Using 1-3 Piezoelectric Composites with Structured Electrodes.” In
Fortschritte Der Akustik - DAGA 2021. Wien: Deutsche Gesellschaft für Akustik
e.V. (DEGA), 2021.'
ieee: D. Dreiling, D. Itner, N. Feldmann, C. Scheidemann, H. Gravenkamp, and B.
Henning, “Application and modelling of ultrasonic transducers using 1-3 piezoelectric
composites with structured electrodes,” presented at the DAGA 2021 - 47. JAHRESTAGUNG
FÜR AKUSTIK, Wien, 2021.
mla: Dreiling, Dmitrij, et al. “Application and Modelling of Ultrasonic Transducers
Using 1-3 Piezoelectric Composites with Structured Electrodes.” Fortschritte
Der Akustik - DAGA 2021, Deutsche Gesellschaft für Akustik e.V. (DEGA), 2021.
short: 'D. Dreiling, D. Itner, N. Feldmann, C. Scheidemann, H. Gravenkamp, B. Henning,
in: Fortschritte Der Akustik - DAGA 2021, Deutsche Gesellschaft für Akustik e.V.
(DEGA), Wien, 2021.'
conference:
end_date: 2021-08-18
location: Wien
name: DAGA 2021 - 47. JAHRESTAGUNG FÜR AKUSTIK
start_date: 2021-08-15
date_created: 2021-10-04T07:54:10Z
date_updated: 2022-09-05T12:54:31Z
ddc:
- '620'
department:
- _id: '49'
- _id: '151'
file:
- access_level: closed
content_type: application/octet-stream
creator: dmitrij
date_created: 2021-10-04T07:49:28Z
date_updated: 2021-10-04T07:49:28Z
file_id: '25268'
file_name: daga
file_size: 906618
relation: main_file
success: 1
file_date_updated: 2021-10-04T07:49:28Z
has_accepted_license: '1'
language:
- iso: eng
place: Wien
project:
- _id: '89'
grant_number: '409779252'
name: Vollständige Bestimmung der akustischen Materialparameter von Polymeren
publication: Fortschritte der Akustik - DAGA 2021
publication_status: published
publisher: Deutsche Gesellschaft für Akustik e.V. (DEGA)
status: public
title: Application and modelling of ultrasonic transducers using 1-3 piezoelectric
composites with structured electrodes
type: conference
user_id: '38259'
year: '2021'
...
---
_id: '17355'
abstract:
- lang: eng
text: Ultrasonic wire bonding is a process to form electrical connections in electronics
well established industry. Typically, a clamping tool is pressed on the wire and
forced to vibrate at relative high frequency 40 to 100 kHz. The ultrasonic vibration
is transmitted through the wire into the interface between wire and substrate.
Due to frictional processes, contamination like oxide layers are removed from
the contact zone, the surface roughness is reduced, and with increasing bond duration
an metallic connection of wire and substrate is established. It is known that
the amount of ultrasonic energy over time directly influences the strength and
reliability of the bond connection, but the determination of optimum bond parameters
is still a challenging experimental task. For this, in the past different model
approaches have been presented, to calculate the bond quality by simulation. Measuring
the friction between wire and substrate to validate these models is a challenging
task at ultrasonic bonding frequency. Therefore a versatile test rig for bonding
experiments at frequencies lower than 1 kHz is setup to get detailed insight into
the different phases of the connection process. It includes a piezoelectric force
sensor for the measurement of the three-dimensional process forces, an electrodynamic
shaker for the vibration excitation and a conventional tension-compression testing
machine to apply the bond normal force. Using this test rig, it is possible to
observe the different phases of bond formation in detail, validate and enhance
existing models and finally optimize bond parameters for different processes.
author:
- first_name: Reinhard
full_name: Schemmel, Reinhard
id: '28647'
last_name: Schemmel
- first_name: Claus
full_name: Scheidemann, Claus
id: '38259'
last_name: Scheidemann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: 'Olaf '
full_name: 'Kirsch, Olaf '
last_name: Kirsch
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Schemmel R, Scheidemann C, Hemsel T, Kirsch O, Sextro W. Experimental analysis
and modelling of bond formation in ultrasonic heavy wire bonding. In: CIPS
2020; 11th International Conference on Integrated Power Electronics Systems.
; 2020:1-6.'
apa: Schemmel, R., Scheidemann, C., Hemsel, T., Kirsch, O., & Sextro, W. (2020).
Experimental analysis and modelling of bond formation in ultrasonic heavy wire
bonding. CIPS 2020; 11th International Conference on Integrated Power Electronics
Systems, 1–6.
bibtex: '@inproceedings{Schemmel_Scheidemann_Hemsel_Kirsch_Sextro_2020, title={Experimental
analysis and modelling of bond formation in ultrasonic heavy wire bonding}, booktitle={CIPS
2020; 11th International Conference on Integrated Power Electronics Systems},
author={Schemmel, Reinhard and Scheidemann, Claus and Hemsel, Tobias and Kirsch,
Olaf and Sextro, Walter}, year={2020}, pages={1–6} }'
chicago: Schemmel, Reinhard, Claus Scheidemann, Tobias Hemsel, Olaf Kirsch, and
Walter Sextro. “Experimental Analysis and Modelling of Bond Formation in Ultrasonic
Heavy Wire Bonding.” In CIPS 2020; 11th International Conference on Integrated
Power Electronics Systems, 1–6, 2020.
ieee: R. Schemmel, C. Scheidemann, T. Hemsel, O. Kirsch, and W. Sextro, “Experimental
analysis and modelling of bond formation in ultrasonic heavy wire bonding,” in
CIPS 2020; 11th International Conference on Integrated Power Electronics Systems,
2020, pp. 1–6.
mla: Schemmel, Reinhard, et al. “Experimental Analysis and Modelling of Bond Formation
in Ultrasonic Heavy Wire Bonding.” CIPS 2020; 11th International Conference
on Integrated Power Electronics Systems, 2020, pp. 1–6.
short: 'R. Schemmel, C. Scheidemann, T. Hemsel, O. Kirsch, W. Sextro, in: CIPS 2020;
11th International Conference on Integrated Power Electronics Systems, 2020, pp.
1–6.'
date_created: 2020-07-06T07:41:21Z
date_updated: 2023-09-21T14:27:32Z
department:
- _id: '151'
language:
- iso: eng
page: 1-6
publication: CIPS 2020; 11th International Conference on Integrated Power Electronics
Systems
quality_controlled: '1'
status: public
title: Experimental analysis and modelling of bond formation in ultrasonic heavy wire
bonding
type: conference
user_id: '210'
year: '2020'
...