Abstract
One of the most important parameters for characterizing piezoelectric materials is the so-called electromechanical coupling coefficient, k, which describes the electromechanical coupling strength. Although this parameter should be an intrinsic material parameter, it appears to depend on the aspect ratio of the resonator. There are three different values defined for three extreme geometries, k33, k33′, and kt, and they differ by more than 50%. Unfortunately, these three values cannot describe resonators of general geometries and also create conceptual confusion. Here, we provide a unified formula that will accurately describe the coupling coefficient of rectangular slender bar transducer array element with any aspect ratio.
| Original language | English (US) |
|---|---|
| Article number | 074102 |
| Journal | Journal of Applied Physics |
| Volume | 99 |
| Issue number | 7 |
| DOIs | |
| State | Published - Apr 1 2006 |
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All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)
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Electromechanical coupling coefficient of an ultrasonic array element. / Kim, Moojoon; Kim, Jungsoon; Cao, Wenwu.
In: Journal of Applied Physics, Vol. 99, No. 7, 074102, 01.04.2006.Research output: Contribution to journal › Article
TY - JOUR
T1 - Electromechanical coupling coefficient of an ultrasonic array element
AU - Kim, Moojoon
AU - Kim, Jungsoon
AU - Cao, Wenwu
PY - 2006/4/1
Y1 - 2006/4/1
N2 - One of the most important parameters for characterizing piezoelectric materials is the so-called electromechanical coupling coefficient, k, which describes the electromechanical coupling strength. Although this parameter should be an intrinsic material parameter, it appears to depend on the aspect ratio of the resonator. There are three different values defined for three extreme geometries, k33, k33′, and kt, and they differ by more than 50%. Unfortunately, these three values cannot describe resonators of general geometries and also create conceptual confusion. Here, we provide a unified formula that will accurately describe the coupling coefficient of rectangular slender bar transducer array element with any aspect ratio.
AB - One of the most important parameters for characterizing piezoelectric materials is the so-called electromechanical coupling coefficient, k, which describes the electromechanical coupling strength. Although this parameter should be an intrinsic material parameter, it appears to depend on the aspect ratio of the resonator. There are three different values defined for three extreme geometries, k33, k33′, and kt, and they differ by more than 50%. Unfortunately, these three values cannot describe resonators of general geometries and also create conceptual confusion. Here, we provide a unified formula that will accurately describe the coupling coefficient of rectangular slender bar transducer array element with any aspect ratio.
UR - http://www.scopus.com/inward/record.url?scp=33645950084&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33645950084&partnerID=8YFLogxK
U2 - 10.1063/1.2180487
DO - 10.1063/1.2180487
M3 - Article
VL - 99
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 7
M1 - 074102
ER -