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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Aging Phenomena of Multilayered PMN-PZT Ceramic Actuator

적층형 PMN-PZT 세라믹 압전 액추에이터의 열화특성

  • 송재성 (한국전기연구원 전자기소자연구그룹) ;
  • 정순종 (한국전기연구원 전자기소자연구그룹) ;
  • 김인성 (한국전기연구원 전자기소자연구그룹) ;
  • 이원재 (한국전기연구원 전자기소자연구그룹) ;
  • 이동윤 (한국전기연구원 전자기소자연구그룹)
  • Published : 2005.05.01
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Abstract

Aging phenomena of 0.2PMN-0.8PZT multilayered ceramic actuators(MCA) have been investigated at the room temperature. The piezoelectric materials were synthesized as conventional ceramic process, and MCA were fabricatedby tape casting methods. The crystalline structures and lattice parameters were investigated by X-ray diffraction analysis, showing the structure was tetragonal and c/a was about 1.01. And, the effective electromechanical coupling coefficient keff and pseudo-piezoelectric constant $d_{33}$were measured. Variable unipolar electric fields, $2{\sim}4kV/mm$, were applied to MCh to investigate the aging characteristics. After 2 kV/mm unipolar electric field, keff and $d_{33}$ were 0.454 and 4.44 respectively. The measured and simulated values using for aging phenomena analysis, had a good fit to the linear logarithmic stretched exponential law.

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References

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