Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Trajectory of Resonant Displacement of Thickness Vibration Mode Piezoelectric Devices According to Diameter/Thickness Ratio

두께와 직경 비에 따른 두께진동모드 압전소자의 공진 변위 궤적

  • Jeong, Yeong-Ho (Department of Electrical Engineering, Chungju National University)
  • Received : 2012.01.11
  • Accepted : 2012.01.20
  • Published : 2012.02.01
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Abstract

In this study, thickness vibration mode piezoelectric devices for AE sensor application were simulated using ATILA FEM program, and then fabricated. Trajectory resonant displacement and electro mechanical coupling factors of the piezoelectric devices were investigated. The simulation results showed that excellent displacement and electro mechanical coupling factor was obtained when the ratio of diameter/thickness($\Phi/T$) was 0.75. The piezoelectric device of $\Phi/T$=0.75 exhibited the optimum values of fr= 183 kHz, displacement= $4.44{\times}10^{-7}[m]$, $k_{33}$= 0.69, which were suitable for the application of AE sensor piezoelectric device.

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References

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