---
_id: '51136'
abstract:
- lang: eng
text: "Iron oxide nanoparticles are very interesting for many applications in different
industrial sectors. A promising\r\nprocess to manufacture these nanoparticles
is flame spray pyrolysis (FSP). A lack of understanding of the\r\nindividual sub-processes
in FSP makes it challenging to tailor nanoparticle properties. This work provides\r\ninsights
into the formation of iron oxide nanoparticles in a turbulent spray flame using
Large Eddy Simulations\r\n(LES), which are based on a comprehensive model, including
customized submodels. Highlights are the\r\nadaption of a turbulent combustion
model and a bivariate hybrid method of moments for modeling nanoparticle\r\ndynamics.
The work focuses on the SpraySyn burner, which is a standardized laboratory burner
and was\r\noperated with a precursor-solvent mixture of ethanol and iron(III)
nitrate nonahydrate. For studying the\r\nrelevance of precursor chemistry, LES
using an evaporation-limited precursor chemistry model is compared\r\nwith a model
that includes detailed iron chemistry. A further novelty is the inclusion of adsorption
in the\r\nsimulation, which defines a third model for comparison. Sufficient validation
is achieved for the undoped LES\r\nusing experimental data from the literature.
A strong impact of the detailed iron chemistry and adsorption\r\nis found on the
precursor consumption and the aggregate and primary particle formation. Comparing
the\r\nparticle diameters with experimental measurements from the literature and
data generated for this work is\r\nfound unsuitable to asses the precursor chemistry
model and revealed an urgent need for future experimental\r\nand numerical research.
This work serves as a step forward in realizing a reliable model."
citation:
ama: Fröde F, Grenga T, Pitsch H, et al., eds. Large Eddy Simulation of Iron
Oxide Formation in a Laboratory Spray Flame. Elsevier; 2023. doi:https://doi.org/10.1016/j.jaecs.2023.100191
apa: Large eddy simulation of iron oxide formation in a laboratory spray flame.
(2023). In F. Fröde, T. Grenga, H. Pitsch, S. Dupont, R. Kneer, R. Tischendorf,
O. Massopo, & H.-J. Schmid (Eds.), Applications in Energy and Combustion
Science. Elsevier. https://doi.org/10.1016/j.jaecs.2023.100191
bibtex: '@book{Fröde_Grenga_Pitsch_Dupont_Kneer_Tischendorf_Massopo_Schmid_2023,
title={Large eddy simulation of iron oxide formation in a laboratory spray flame},
DOI={https://doi.org/10.1016/j.jaecs.2023.100191},
journal={Applications in Energy and Combustion Science}, publisher={Elsevier},
year={2023} }'
chicago: Fröde, Fabian , Temistocle Grenga, Heinz Pitsch, Sophie Dupont, Reinhold
Kneer, Ricardo Tischendorf, Orlando Massopo, and Hans-Joachim Schmid, eds. Large
Eddy Simulation of Iron Oxide Formation in a Laboratory Spray Flame. Applications
in Energy and Combustion Science. Elsevier, 2023. https://doi.org/10.1016/j.jaecs.2023.100191.
ieee: F. Fröde et al., Eds., Large eddy simulation of iron oxide formation
in a laboratory spray flame. Elsevier, 2023.
mla: Fröde, Fabian, et al., editors. “Large Eddy Simulation of Iron Oxide Formation
in a Laboratory Spray Flame.” Applications in Energy and Combustion Science,
Elsevier, 2023, doi:https://doi.org/10.1016/j.jaecs.2023.100191.
short: F. Fröde, T. Grenga, H. Pitsch, S. Dupont, R. Kneer, R. Tischendorf, O. Massopo,
H.-J. Schmid, eds., Large Eddy Simulation of Iron Oxide Formation in a Laboratory
Spray Flame, Elsevier, 2023.
date_created: 2024-02-05T12:17:35Z
date_updated: 2024-02-05T12:38:43Z
department:
- _id: '150'
doi: https://doi.org/10.1016/j.jaecs.2023.100191
editor:
- first_name: 'Fabian '
full_name: 'Fröde, Fabian '
last_name: Fröde
- first_name: 'Temistocle '
full_name: 'Grenga, Temistocle '
last_name: Grenga
- first_name: 'Heinz '
full_name: 'Pitsch, Heinz '
last_name: Pitsch
- first_name: Sophie
full_name: Dupont, Sophie
last_name: Dupont
- first_name: Reinhold
full_name: Kneer, Reinhold
last_name: Kneer
- first_name: Ricardo
full_name: Tischendorf, Ricardo
id: '67002'
last_name: Tischendorf
- first_name: Orlando
full_name: Massopo, Orlando
id: '98419'
last_name: Massopo
- first_name: Hans-Joachim
full_name: Schmid, Hans-Joachim
id: '464'
last_name: Schmid
orcid: 000-0001-8590-1921
has_accepted_license: '1'
keyword:
- Flame spray pyrolysis
- Iron oxide formation
- Large eddy simulation
- Method of moments
- SpraySyn
language:
- iso: eng
main_file_link:
- url: https://www.sciencedirect.com/science/article/pii/S2666352X23000808
publication: Applications in Energy and Combustion Science
publication_status: published
publisher: Elsevier
status: public
title: Large eddy simulation of iron oxide formation in a laboratory spray flame
type: journal_editor
user_id: '98419'
year: '2023'
...
---
_id: '30917'
abstract:
- lang: eng
text: "We study lobby group formation in a two-stage model where the players \x1Crst
form lobby\r\ngroups that then engage in a rent-seeking contest to in\x1Duence
the legislator. However, the\r\noutcome of the contest a\eects all players according
to the ideological distance between the\r\nimplemented policy and the players'
preferences. The players can either lobby by themselves,\r\nform a coalition of
lobbyists or free ride. We \x1Cnd that free coalition formation is reasonable\r\nif
either players with moderate preferences face lobby groups with extreme preferences,
or if\r\nthere are two opposing coalitions with an equal number of members. Otherwise,
there are\r\nalways free riders among the players."
article_type: original
author:
- first_name: Lukas
full_name: Block, Lukas
id: '22527'
last_name: Block
citation:
ama: Block L. Coalition formation versus free riding in rent-seeking contests. Quick
And Easy Journal Title. Published online 2022.
apa: Block, L. (2022). Coalition formation versus free riding in rent-seeking contests.
Quick And Easy Journal Title.
bibtex: '@article{Block_2022, title={Coalition formation versus free riding in rent-seeking
contests}, journal={Quick And Easy Journal Title}, author={Block, Lukas}, year={2022}
}'
chicago: Block, Lukas. “Coalition Formation versus Free Riding in Rent-Seeking Contests.”
Quick And Easy Journal Title, 2022.
ieee: L. Block, “Coalition formation versus free riding in rent-seeking contests,”
Quick And Easy Journal Title, 2022.
mla: Block, Lukas. “Coalition Formation versus Free Riding in Rent-Seeking Contests.”
Quick And Easy Journal Title, 2022.
short: L. Block, Quick And Easy Journal Title (2022).
date_created: 2022-04-19T15:06:55Z
date_updated: 2022-04-19T15:09:44Z
ddc:
- '330'
file:
- access_level: open_access
content_type: application/pdf
creator: lblock
date_created: 2022-04-19T15:06:49Z
date_updated: 2022-04-19T15:06:49Z
file_id: '30918'
file_name: Coalition formation versus free riding in rent-seeking contests.pdf
file_size: 270316
relation: main_file
file_date_updated: 2022-04-19T15:06:49Z
has_accepted_license: '1'
jel:
- C71
- D72
- D74
keyword:
- Group formation
- Rent-seeking
- Free riding
language:
- iso: eng
oa: '1'
publication: Quick And Easy Journal Title
status: public
title: Coalition formation versus free riding in rent-seeking contests
type: journal_article
user_id: '22527'
year: '2022'
...
---
_id: '29803'
abstract:
- lang: eng
text: "Ultrasonic wire bonding is a solid-state joining process used to form electrical
interconnections in micro and\r\npower electronics and batteries. A high frequency
oscillation causes a metallurgical bond deformation in\r\nthe contact area. Due
to the numerous physical influencing factors, it is very difficult to accurately
capture\r\nthis process in a model. Therefore, our goal is to determine a suitable
feed-forward control strategy for the\r\nbonding process even without detailed
model knowledge. We propose the use of batch constrained Bayesian\r\noptimization
for the control design. Hence, Bayesian optimization is precisely adapted to the
application of\r\nbonding: the constraint is used to check one quality feature
of the process and the use of batches leads to\r\nmore efficient experiments.
Our approach is suitable to determine a feed-forward control for the bonding\r\nprocess
that provides very high quality bonds without using a physical model. We also
show that the quality\r\nof the Bayesian optimization based control outperforms
random search as well as manual search by a user.\r\nUsing a simple prior knowledge
model derived from data further improves the quality of the connection.\r\nThe
Bayesian optimization approach offers the possibility to perform a sensitivity
analysis of the control\r\nparameters, which allows to evaluate the influence
of each control parameter on the bond quality. In summary,\r\nBayesian optimization
applied to the bonding process provides an excellent opportunity to develop a
feedforward\r\ncontrol without full modeling of the underlying physical processes."
author:
- first_name: Michael
full_name: Hesse, Michael
id: '29222'
last_name: Hesse
- first_name: Matthias
full_name: Hunstig, Matthias
last_name: Hunstig
- first_name: Julia
full_name: Timmermann, Julia
id: '15402'
last_name: Timmermann
- first_name: Ansgar
full_name: Trächtler, Ansgar
id: '552'
last_name: Trächtler
citation:
ama: 'Hesse M, Hunstig M, Timmermann J, Trächtler A. Batch Constrained Bayesian
Optimization for UltrasonicWire Bonding Feed-forward Control Design. In: Proceedings
of the 11th International Conference on Pattern Recognition Applications and Methods
(ICPRAM). ; 2022:383-394.'
apa: Hesse, M., Hunstig, M., Timmermann, J., & Trächtler, A. (2022). Batch Constrained
Bayesian Optimization for UltrasonicWire Bonding Feed-forward Control Design.
Proceedings of the 11th International Conference on Pattern Recognition Applications
and Methods (ICPRAM), 383–394.
bibtex: '@inproceedings{Hesse_Hunstig_Timmermann_Trächtler_2022, title={Batch Constrained
Bayesian Optimization for UltrasonicWire Bonding Feed-forward Control Design},
booktitle={Proceedings of the 11th International Conference on Pattern Recognition
Applications and Methods (ICPRAM)}, author={Hesse, Michael and Hunstig, Matthias
and Timmermann, Julia and Trächtler, Ansgar}, year={2022}, pages={383–394} }'
chicago: Hesse, Michael, Matthias Hunstig, Julia Timmermann, and Ansgar Trächtler.
“Batch Constrained Bayesian Optimization for UltrasonicWire Bonding Feed-Forward
Control Design.” In Proceedings of the 11th International Conference on Pattern
Recognition Applications and Methods (ICPRAM), 383–94, 2022.
ieee: M. Hesse, M. Hunstig, J. Timmermann, and A. Trächtler, “Batch Constrained
Bayesian Optimization for UltrasonicWire Bonding Feed-forward Control Design,”
in Proceedings of the 11th International Conference on Pattern Recognition
Applications and Methods (ICPRAM), Online, 2022, pp. 383–394.
mla: Hesse, Michael, et al. “Batch Constrained Bayesian Optimization for UltrasonicWire
Bonding Feed-Forward Control Design.” Proceedings of the 11th International
Conference on Pattern Recognition Applications and Methods (ICPRAM), 2022,
pp. 383–94.
short: 'M. Hesse, M. Hunstig, J. Timmermann, A. Trächtler, in: Proceedings of the
11th International Conference on Pattern Recognition Applications and Methods
(ICPRAM), 2022, pp. 383–394.'
conference:
end_date: 2022-02-05
location: Online
name: 11th International Conference on Pattern Recognition Applications and Methods
start_date: 2022-02-03
date_created: 2022-02-09T12:50:25Z
date_updated: 2023-11-06T15:17:12Z
department:
- _id: '153'
keyword:
- Bayesian optimization
- Wire bonding
- Feed-forward control
- model-free design
language:
- iso: eng
page: 383-394
publication: Proceedings of the 11th International Conference on Pattern Recognition
Applications and Methods (ICPRAM)
publication_identifier:
isbn:
- 978-989-758-549-4
quality_controlled: '1'
status: public
title: Batch Constrained Bayesian Optimization for UltrasonicWire Bonding Feed-forward
Control Design
type: conference
user_id: '29222'
year: '2022'
...
---
_id: '25212'
abstract:
- lang: eng
text: "Finding a good query plan is key to the optimization of query runtime. This
holds in particular for cost-based federation\r\nengines, which make use of cardinality
estimations to achieve this goal. A number of studies compare SPARQL federation
engines across different performance metrics, including query runtime, result
set completeness and correctness, number of sources selected and number of requests
sent. Albeit informative, these metrics are generic and unable to quantify and
evaluate the accuracy of the cardinality estimators of cost-based federation engines.
To thoroughly evaluate cost-based federation engines, the effect of estimated
cardinality errors on the overall query runtime performance must be measured.
In this paper, we address this challenge by presenting novel evaluation metrics
targeted at a fine-grained benchmarking of cost-based federated SPARQL query engines.
We evaluate five cost-based federated SPARQL query engines using existing as well
as novel evaluation metrics by using LargeRDFBench queries. Our results provide
a detailed analysis of the experimental outcomes that reveal novel insights, useful
for the development of future cost-based federated SPARQL query processing engines."
article_type: original
author:
- first_name: Umair
full_name: Qudus, Umair
id: '83392'
last_name: Qudus
- first_name: Muhammad
full_name: Saleem, Muhammad
last_name: Saleem
- first_name: Axel-Cyrille
full_name: Ngonga Ngomo, Axel-Cyrille
id: '65716'
last_name: Ngonga Ngomo
- first_name: Young-Koo
full_name: Lee, Young-Koo
last_name: Lee
citation:
ama: Qudus U, Saleem M, Ngonga Ngomo A-C, Lee Y-K. An Empirical Evaluation of Cost-based
Federated SPARQL Query Processing Engines. Semantic Web. 12(6):843-868.
doi:10.3233/SW-200420
apa: Qudus, U., Saleem, M., Ngonga Ngomo, A.-C., & Lee, Y.-K. (n.d.). An Empirical
Evaluation of Cost-based Federated SPARQL Query Processing Engines. Semantic
Web, 12(6), 843–868. https://doi.org/10.3233/SW-200420
bibtex: '@article{Qudus_Saleem_Ngonga Ngomo_Lee, title={An Empirical Evaluation
of Cost-based Federated SPARQL Query Processing Engines}, volume={12}, DOI={10.3233/SW-200420}, number={6}, journal={Semantic
Web}, publisher={ISO Press}, author={Qudus, Umair and Saleem, Muhammad and Ngonga
Ngomo, Axel-Cyrille and Lee, Young-Koo}, pages={843–868} }'
chicago: 'Qudus, Umair, Muhammad Saleem, Axel-Cyrille Ngonga Ngomo, and Young-Koo
Lee. “An Empirical Evaluation of Cost-Based Federated SPARQL Query Processing
Engines.” Semantic Web 12, no. 6 (n.d.): 843–68. https://doi.org/10.3233/SW-200420.'
ieee: 'U. Qudus, M. Saleem, A.-C. Ngonga Ngomo, and Y.-K. Lee, “An Empirical Evaluation
of Cost-based Federated SPARQL Query Processing Engines,” Semantic Web,
vol. 12, no. 6, pp. 843–868, doi: 10.3233/SW-200420.'
mla: Qudus, Umair, et al. “An Empirical Evaluation of Cost-Based Federated SPARQL
Query Processing Engines.” Semantic Web, vol. 12, no. 6, ISO Press, pp.
843–68, doi:10.3233/SW-200420.
short: U. Qudus, M. Saleem, A.-C. Ngonga Ngomo, Y.-K. Lee, Semantic Web 12 (n.d.)
843–868.
date_created: 2021-10-01T06:52:52Z
date_updated: 2024-01-13T11:40:25Z
ddc:
- '000'
department:
- _id: '574'
doi: 10.3233/SW-200420
file:
- access_level: closed
content_type: application/pdf
creator: uqudus
date_created: 2024-01-13T11:35:53Z
date_updated: 2024-01-13T11:35:53Z
file_id: '50483'
file_name: swj2604.pdf
file_size: 978478
relation: main_file
success: 1
file_date_updated: 2024-01-13T11:35:53Z
has_accepted_license: '1'
intvolume: ' 12'
issue: '6'
keyword:
- SPARQL
- benchmarking
- cost-based
- cost-free
- federated
- querying
language:
- iso: eng
page: 843-868
project:
- _id: '410'
grant_number: '860801'
name: 'KnowGraphs: KnowGraphs: Knowledge Graphs at Scale'
publication: Semantic Web
publication_identifier:
issn:
- 2210-4968
publication_status: accepted
publisher: ISO Press
status: public
title: An Empirical Evaluation of Cost-based Federated SPARQL Query Processing Engines
type: journal_article
user_id: '83392'
volume: 12
year: '2021'
...
---
_id: '4947'
abstract:
- lang: eng
text: Manufacturers increasingly integrate information and communication technologies
into their products so that they can provide IT-based services. Organizations
that formerly concentrated on transactional sales thus confront a new challenge
associated with managing service usage—retention and extracting value from investments
in smart technology. This study combines a marketing and an information systems
perspective in a field study conducted jointly with a large European car manufacturer.
Understanding the renewal decision for IT-based service contracts requires knowledge
from both disciplines. The paper shows that combining behavioral predictor variables
stemming from marketing research and technology-related perceptual variables stemming
from technology acceptance research increases the explanatory power and prediction
accuracy of forecasting models for customer renewal decisions. Specifically, the
authors show that perceptions of usefulness become more important the longer customers
use IT-based services and the more services they use within the service contract.
article_type: original
author:
- first_name: Florian v
full_name: Wangenheim, Florian v
last_name: Wangenheim
- first_name: Nancy
full_name: Wünderlich, Nancy
id: '36392'
last_name: Wünderlich
- first_name: Jan H
full_name: Schumann, Jan H
last_name: Schumann
citation:
ama: Wangenheim F v, Wünderlich N, Schumann JH. Renew or cancel? Drivers of customer
renewal decisions for IT-based service contracts. Journal of Business Research.
2017;(79):181--188.
apa: Wangenheim, F. v, Wünderlich, N., & Schumann, J. H. (2017). Renew or cancel?
Drivers of customer renewal decisions for IT-based service contracts. Journal
of Business Research, (79), 181--188.
bibtex: '@article{Wangenheim_Wünderlich_Schumann_2017, title={Renew or cancel? Drivers
of customer renewal decisions for IT-based service contracts}, number={79}, journal={Journal
of Business Research}, publisher={Elsevier}, author={Wangenheim, Florian v and
Wünderlich, Nancy and Schumann, Jan H}, year={2017}, pages={181--188} }'
chicago: 'Wangenheim, Florian v, Nancy Wünderlich, and Jan H Schumann. “Renew or
Cancel? Drivers of Customer Renewal Decisions for IT-Based Service Contracts.”
Journal of Business Research, no. 79 (2017): 181--188.'
ieee: F. v Wangenheim, N. Wünderlich, and J. H. Schumann, “Renew or cancel? Drivers
of customer renewal decisions for IT-based service contracts,” Journal of Business
Research, no. 79, pp. 181--188, 2017.
mla: Wangenheim, Florian v, et al. “Renew or Cancel? Drivers of Customer Renewal
Decisions for IT-Based Service Contracts.” Journal of Business Research,
no. 79, Elsevier, 2017, pp. 181--188.
short: F. v Wangenheim, N. Wünderlich, J.H. Schumann, Journal of Business Research
(2017) 181--188.
date_created: 2018-10-26T10:11:34Z
date_updated: 2022-01-06T07:01:30Z
department:
- _id: '178'
- _id: '181'
issue: '79'
keyword:
- IT-based service
- Smart services
- Contract renewal
- Retention
- Customer churn
- Free trial
language:
- iso: eng
page: 181--188
publication: Journal of Business Research
publication_status: published
publisher: Elsevier
status: public
title: Renew or cancel? Drivers of customer renewal decisions for IT-based service
contracts
type: journal_article
user_id: '37741'
year: '2017'
...
---
_id: '13187'
abstract:
- lang: eng
text: Abstract The reaction of Cu(I) bisguanidine complexes with nitric oxide and
the formation of intermediate species were monitored via UV-vis spectroscopy at
low temperature, with the occurrence of characteristic absorption bands. The origin
of the emerging species and their character were substantiated by electron paramagnetic
resonance (EPR) measurements and density functional theory (DFT) studies showing
a delocalized {CuNO}11 radical species. Furthermore, this system was transferred
to the SuperFocus mixer setup, which allows rapid mixing and the determination
of decay constants at ambient temperatures of the thermally sensitive species.
However, these experiments demonstrated the limits of these systems, such as the
NO saturation in organic solvents and a preferably precise temperature control
within the SuperFocus mixer, which should be addressed in the future.
author:
- first_name: Alexander
full_name: Oppermann, Alexander
last_name: Oppermann
- first_name: Larissa
full_name: Laurini, Larissa
last_name: Laurini
- first_name: Fabian
full_name: Etscheidt, Fabian
last_name: Etscheidt
- first_name: Katharina
full_name: Hollmann, Katharina
last_name: Hollmann
- first_name: Florian
full_name: Strassl, Florian
last_name: Strassl
- first_name: Alexander
full_name: Hoffmann, Alexander
last_name: Hoffmann
- first_name: Daniela
full_name: Schurr, Daniela
last_name: Schurr
- first_name: Roland
full_name: Dittmeyer, Roland
last_name: Dittmeyer
- first_name: Günter
full_name: Rinke, Günter
last_name: Rinke
- first_name: Sonja
full_name: Herres-Pawlis, Sonja
last_name: Herres-Pawlis
citation:
ama: Oppermann A, Laurini L, Etscheidt F, et al. Detection of Copper Bisguanidine
NO Adducts by UV-vis Spectroscopy and a SuperFocus Mixer. Chemical Engineering
\& Technology. 2017;40(8):1475-1483. doi:10.1002/ceat.201600691
apa: Oppermann, A., Laurini, L., Etscheidt, F., Hollmann, K., Strassl, F., Hoffmann,
A., … Herres-Pawlis, S. (2017). Detection of Copper Bisguanidine NO Adducts by
UV-vis Spectroscopy and a SuperFocus Mixer. Chemical Engineering \& Technology,
40(8), 1475–1483. https://doi.org/10.1002/ceat.201600691
bibtex: '@article{Oppermann_Laurini_Etscheidt_Hollmann_Strassl_Hoffmann_Schurr_Dittmeyer_Rinke_Herres-Pawlis_2017,
title={Detection of Copper Bisguanidine NO Adducts by UV-vis Spectroscopy and
a SuperFocus Mixer}, volume={40}, DOI={10.1002/ceat.201600691},
number={8}, journal={Chemical Engineering \& Technology}, author={Oppermann,
Alexander and Laurini, Larissa and Etscheidt, Fabian and Hollmann, Katharina and
Strassl, Florian and Hoffmann, Alexander and Schurr, Daniela and Dittmeyer, Roland
and Rinke, Günter and Herres-Pawlis, Sonja}, year={2017}, pages={1475–1483} }'
chicago: 'Oppermann, Alexander, Larissa Laurini, Fabian Etscheidt, Katharina Hollmann,
Florian Strassl, Alexander Hoffmann, Daniela Schurr, Roland Dittmeyer, Günter
Rinke, and Sonja Herres-Pawlis. “Detection of Copper Bisguanidine NO Adducts by
UV-Vis Spectroscopy and a SuperFocus Mixer.” Chemical Engineering \& Technology
40, no. 8 (2017): 1475–83. https://doi.org/10.1002/ceat.201600691.'
ieee: A. Oppermann et al., “Detection of Copper Bisguanidine NO Adducts by
UV-vis Spectroscopy and a SuperFocus Mixer,” Chemical Engineering \& Technology,
vol. 40, no. 8, pp. 1475–1483, 2017.
mla: Oppermann, Alexander, et al. “Detection of Copper Bisguanidine NO Adducts by
UV-Vis Spectroscopy and a SuperFocus Mixer.” Chemical Engineering \& Technology,
vol. 40, no. 8, 2017, pp. 1475–83, doi:10.1002/ceat.201600691.
short: A. Oppermann, L. Laurini, F. Etscheidt, K. Hollmann, F. Strassl, A. Hoffmann,
D. Schurr, R. Dittmeyer, G. Rinke, S. Herres-Pawlis, Chemical Engineering \&
Technology 40 (2017) 1475–1483.
date_created: 2019-09-11T11:01:30Z
date_updated: 2022-01-06T06:51:30Z
doi: 10.1002/ceat.201600691
intvolume: ' 40'
issue: '8'
keyword:
- Copper guanidine complexes
- Nitric oxide
- SuperFocus mixer
language:
- iso: eng
page: 1475-1483
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: Chemical Engineering \& Technology
status: public
title: Detection of Copper Bisguanidine NO Adducts by UV-vis Spectroscopy and a SuperFocus
Mixer
type: journal_article
user_id: '40778'
volume: 40
year: '2017'
...
---
_id: '9959'
abstract:
- lang: eng
text: Ultrasonic heavy wire bonding is a commonly used technology to conduct electrical
devices in power electronics. In order to facilitate powerful solutions combined
with an increased efficiency, involving a material change from aluminum to copper
wire as conductor material takes place in recent years. Due to the material related
properties, copper wire bonding requires significant higher bond processing parameters
such as bond force and ultrasonic power compared to aluminum which can lead to
damages or a failure of the bonded component. Therefore, a profound knowledge
of the processes prevailing during wire bonding is essential to optimize the application
of the copper wires and consequently to achieve the demands on quality and reliability.
The behavior of different natural surface oxides of aluminum and copper are assumed
to be one reason for the deviation in the required bond parameters. Accordingly,
the impact of differently pre-treated substrates surfaces on which the bonding
is applied were investigated in this study. First, all conditions investigated
(as-received, oxidefree, AlOx and the CuOx) were characterized by utilizing scanning
electron microscopy, energy dispersive X-ray spectroscopy, focused ion beam microscopy
and atomic force microscopy. In addition, hardness tests were performed as well
as perthometer measurements. Afterwards, a 500 $\mu$ m copper wire was bonded
on the generated surfaces investigated. In consideration of the roughness, shear
test of various bond times and microscopic images were evaluated. Finally, the
results were compared and discussed. Overall, the current study indicates that
an Al-oxide layer is beneficial for welding process in Cu wire bonding. On the
contrary, the Cu-oxide is detrimental and leads to a delayed welding of the joining
parts. Based on the obtained results, it can be expected that due to an ideal
set of Al-oxide layers, lower optimal bond parameters can used to reach high bond
strength with good reliability properties.
author:
- first_name: Florian
full_name: Eacock, Florian
last_name: Eacock
- first_name: Andreas
full_name: Unger, Andreas
last_name: Unger
- first_name: Paul
full_name: Eichwald, Paul
last_name: Eichwald
- first_name: Olexandr
full_name: Grydin, Olexandr
last_name: Grydin
- first_name: Florian
full_name: Hengsbach, Florian
last_name: Hengsbach
- first_name: Simon
full_name: Althoff, Simon
last_name: Althoff
- first_name: Mirko
full_name: Schaper, Mirko
last_name: Schaper
- first_name: Karsten
full_name: Guth, Karsten
last_name: Guth
citation:
ama: 'Eacock F, Unger A, Eichwald P, et al. Effect of different oxide layers on
the ultrasonic copper wire bond process. In: IEEE 66th Electronic Components
and Technology Conference. ; 2016:2111-2118. doi:10.1109/ECTC.2016.91'
apa: Eacock, F., Unger, A., Eichwald, P., Grydin, O., Hengsbach, F., Althoff, S.,
… Guth, K. (2016). Effect of different oxide layers on the ultrasonic copper wire
bond process. In IEEE 66th Electronic Components and Technology Conference
(pp. 2111–2118). https://doi.org/10.1109/ECTC.2016.91
bibtex: '@inproceedings{Eacock_Unger_Eichwald_Grydin_Hengsbach_Althoff_Schaper_Guth_2016,
title={Effect of different oxide layers on the ultrasonic copper wire bond process},
DOI={10.1109/ECTC.2016.91},
booktitle={IEEE 66th Electronic Components and Technology Conference}, author={Eacock,
Florian and Unger, Andreas and Eichwald, Paul and Grydin, Olexandr and Hengsbach,
Florian and Althoff, Simon and Schaper, Mirko and Guth, Karsten}, year={2016},
pages={2111–2118} }'
chicago: Eacock, Florian, Andreas Unger, Paul Eichwald, Olexandr Grydin, Florian
Hengsbach, Simon Althoff, Mirko Schaper, and Karsten Guth. “Effect of Different
Oxide Layers on the Ultrasonic Copper Wire Bond Process.” In IEEE 66th Electronic
Components and Technology Conference, 2111–18, 2016. https://doi.org/10.1109/ECTC.2016.91.
ieee: F. Eacock et al., “Effect of different oxide layers on the ultrasonic
copper wire bond process,” in IEEE 66th Electronic Components and Technology
Conference, 2016, pp. 2111–2118.
mla: Eacock, Florian, et al. “Effect of Different Oxide Layers on the Ultrasonic
Copper Wire Bond Process.” IEEE 66th Electronic Components and Technology Conference,
2016, pp. 2111–18, doi:10.1109/ECTC.2016.91.
short: 'F. Eacock, A. Unger, P. Eichwald, O. Grydin, F. Hengsbach, S. Althoff, M.
Schaper, K. Guth, in: IEEE 66th Electronic Components and Technology Conference,
2016, pp. 2111–2118.'
date_created: 2019-05-27T09:00:50Z
date_updated: 2019-09-16T10:38:59Z
department:
- _id: '151'
doi: 10.1109/ECTC.2016.91
keyword:
- Ultrasonic copper wire bonding
- Al-oxide
- Cuoxide
- oxide-free
- roughness
- morphology
language:
- iso: eng
page: 2111-2118
publication: IEEE 66th Electronic Components and Technology Conference
quality_controlled: '1'
status: public
title: Effect of different oxide layers on the ultrasonic copper wire bond process
type: conference
user_id: '55222'
year: '2016'
...
---
_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: '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: '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: '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'
...
---
_id: '9759'
abstract:
- lang: eng
text: Among various lead-free piezoelectric materials, (K,Na)NbO$_{3}$ is a very
promising candidate. In this study, (K,Na)NbO$_{3}$ ceramics were sintered from
mixed (K,Na)NbO$_{3}$ and NaNbO$_{3}$ powders prepared by hydrothermal reaction.
These two powders were mixed with distilled water in a KNbO$_{3}$/NaNbO$_{3}$
molar ratio of 1. After sintering the mixed powder, the solid solution of (Na,K)NbO$_{3}$
ceramics was obtained. The electrical properties such as the electromechanical
coupling factors k$_{p}$ and k$_{33}$, the mechanical quality factor, Q$_{m}$,
and the piezoelectric constant d$_{33}$ of the sintered (K,Na)NbO$_{3}$ ceramics
were 0.32, 0.48, 71 (radial mode), 118 ((33)mode), and 107 pC/N, respectively.
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. (K,Na)NbO3 lead-free
piezoelectric ceramics synthesized from hydrothermal powders. Materials Letters.
2010;64(2):125-128. doi:10.1016/j.matlet.2009.10.012
apa: Maeda, T., Takiguchi, N., Morita, T., Ishikawa, M., & Hemsel, T. (2010).
(K,Na)NbO3 lead-free piezoelectric ceramics synthesized from hydrothermal powders.
Materials Letters, 64(2), 125–128. https://doi.org/10.1016/j.matlet.2009.10.012
bibtex: '@article{Maeda_Takiguchi_Morita_Ishikawa_Hemsel_2010, title={(K,Na)NbO3
lead-free piezoelectric ceramics synthesized from hydrothermal powders}, volume={64},
DOI={10.1016/j.matlet.2009.10.012},
number={2}, journal={Materials Letters}, author={Maeda, Takafumi and Takiguchi,
Norihito and Morita, Takeshi and Ishikawa, Mutsuo and Hemsel, Tobias}, year={2010},
pages={125–128} }'
chicago: 'Maeda, Takafumi, Norihito Takiguchi, Takeshi Morita, Mutsuo Ishikawa,
and Tobias Hemsel. “(K,Na)NbO3 Lead-Free Piezoelectric Ceramics Synthesized from
Hydrothermal Powders.” Materials Letters 64, no. 2 (2010): 125–28. https://doi.org/10.1016/j.matlet.2009.10.012.'
ieee: T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, and T. Hemsel, “(K,Na)NbO3
lead-free piezoelectric ceramics synthesized from hydrothermal powders,” Materials
Letters, vol. 64, no. 2, pp. 125–128, 2010.
mla: Maeda, Takafumi, et al. “(K,Na)NbO3 Lead-Free Piezoelectric Ceramics Synthesized
from Hydrothermal Powders.” Materials Letters, vol. 64, no. 2, 2010, pp.
125–28, doi:10.1016/j.matlet.2009.10.012.
short: T. Maeda, N. Takiguchi, T. Morita, M. Ishikawa, T. Hemsel, Materials Letters
64 (2010) 125–128.
date_created: 2019-05-13T10:21:17Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
doi: 10.1016/j.matlet.2009.10.012
intvolume: ' 64'
issue: '2'
keyword:
- Lead-free piezoelectric material
- (K
- Na)NbO$_{3}$ ceramics
- Sintering solid solution
- Piezoelectric properties
language:
- iso: eng
page: 125-128
publication: Materials Letters
publication_identifier:
issn:
- 1948-5719
quality_controlled: '1'
status: public
title: (K,Na)NbO3 lead-free piezoelectric ceramics synthesized from hydrothermal powders
type: journal_article
user_id: '55222'
volume: 64
year: '2010'
...