Effective Electromechanical Coupling for the Partially
Electroded Ceramic Resonators of Different Geometries

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Effective Electromechanical Coupling for the Partially Electroded Ceramic Resonators of Different ...

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D 2015

Effective Electromechanical Coupling for the Partially Electroded Ceramic Resonators of Different Geometries

ERHART, Jiří and Tutu SEBASTIAN

Basic information

Original name

Effective Electromechanical Coupling for the Partially Electroded Ceramic Resonators of Different Geometries

Authors

ERHART, Jiří (203 Czech Republic, guarantor, belonging to the institution) and Tutu SEBASTIAN (356 India)

Edition

Galati, THE ANNALS OF “DUNAREA DE JOS” UNIVERSITY OF GALATI. FASCICLE IX. METALLURGY AND MATERIALS SCIENCE, p. 7-16, 10 pp. 2015

Publisher

University of Galati

Other information

Language

English

Type of outcome

Proceedings paper

Field of Study

Solid-state physics and magnetism

Country of publisher

Romania

Confidentiality degree

is not subject to a state or trade secret

Publication form

electronic version available online

RIV identification code

RIV/46747885:24510/15:#0001262

Organization

Faculty of Science, Humanities and Education – Technical University of Liberec – Repository

ISSN

Keywords in English

piezoelectric ceramics; PZT; resonator; vibration modes; electromechanical coupling factor

Changed: 5/4/2016 09:14, Jiří Erhart

Abstract

In the original language

Effective electromechanical coupling factor (ECF) was studied on bar, disc and ring ceramic resonators partially covered by the electrodes. ECF’s were calculated theoretically and verified experimentally. Bar resonators (k31-mode) show maximum value of ECF keff = 0.26 at the electrode aspect ratio equal 0.75 with calculated values fitting the experimental data for all aspect ratios. Calculations for bar resonators with embedded electrodes (k33-mode) show similar behavior like for k31-mode, but at higher ECF’s. Maximum value of ECF for such mode reaches keff = 0.67 for the electrode aspect ratio 0.75. Partially electroded disc resonators (kp-mode) are well described analytically by one-dimensional model only for the electrode aspect ratios up to 0.5. Maximum value keff = 0.58 for disc resonators was measured at the electrode aspect ratio equal 0.80. Partially electroded ring resonators (kp-mode) show the same trend as discs without saturation of ECF values. Maximum ECF keff = 0.34 was measured for ring resonators with full electrode. Presented analytical formulae may serve as a guide for the optimum electrode pattern design for the partially electroded resonators.

Cite

ERHART, Jiří and Tutu SEBASTIAN. Effective Electromechanical Coupling for the Partially Electroded Ceramic Resonators of Different Geometries. Online. In Marian BORDEI. THE ANNALS OF “DUNAREA DE JOS” UNIVERSITY OF GALATI. FASCICLE IX. METALLURGY AND MATERIALS SCIENCE. Galati: University of Galati, 2015, p. 7-16. ISSN 1453-083X.

@inproceedings{20599,
   author = {Erhart, Jiří and Sebastian, Tutu},
   address = {Galati},
   booktitle = {THE ANNALS OF “DUNAREA DE JOS” UNIVERSITY OF GALATI. FASCICLE IX. METALLURGY AND MATERIALS SCIENCE},
   editor = {Marian BORDEI},
   keywords = {piezoelectric ceramics; PZT; resonator; vibration modes; electromechanical coupling factor},
   howpublished = {elektronická verze "online"},
   language = {eng},
   location = {Galati},
   pages = {7-16},
   publisher = {University of Galati},
   title = {Effective Electromechanical Coupling for the Partially Electroded Ceramic Resonators of Different Geometries},
   year = {2015}
}

TY  - CONF
ID  - 20599
AU  - Erhart, Jiří - Sebastian, Tutu
PY  - 2015
TI  - Effective Electromechanical Coupling for the Partially Electroded Ceramic Resonators of Different Geometries
PB  - University of Galati
CY  - Galati
KW  - piezoelectric ceramics
KW  - PZT
KW  - resonator
KW  - vibration modes
KW  - electromechanical coupling factor
N2  - Effective electromechanical coupling factor (ECF) was studied on bar, disc and ring ceramic resonators partially covered by the electrodes. ECF’s were calculated theoretically and verified experimentally. Bar resonators (k31-mode) show maximum value of ECF keff = 0.26 at the electrode aspect ratio equal 0.75 with calculated values fitting the experimental data for all aspect ratios. Calculations for bar resonators with embedded electrodes (k33-mode) show similar behavior like for k31-mode, but at higher ECF’s. Maximum value of ECF for such mode reaches keff = 0.67 for the electrode aspect ratio 0.75. Partially electroded disc resonators (kp-mode) are well described analytically by one-dimensional model only for the electrode aspect ratios up to 0.5. Maximum value keff = 0.58 for disc resonators was measured at the electrode aspect ratio equal 0.80. Partially electroded ring resonators (kp-mode) show the same trend as discs without saturation of ECF values. Maximum ECF keff = 0.34 was measured for ring resonators with full electrode. Presented analytical formulae may serve as a guide for the optimum electrode pattern design for the partially electroded resonators.
ER  -

ERHART, Jiří and Tutu SEBASTIAN. Effective Electromechanical Coupling for the Partially Electroded Ceramic Resonators of Different Geometries. Online. In Marian BORDEI. \textit{THE ANNALS OF “DUNAREA DE JOS” UNIVERSITY OF GALATI. FASCICLE IX. METALLURGY AND MATERIALS SCIENCE}. Galati: University of Galati, 2015, p.~7-16. ISSN~1453-083X.