Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Electric-Field-Induced Strain Properties of Multi Layer Ceramic Actuator Using PMN-PZ-PT Ceramics

PMN-PZ-PT 세라믹스를 이용한 적층형 액츄에이터의 변위특성

  • 하문수 (한국전기연구원 전자기소자연구그룹) ;
  • 정순종 (한국전기연구원 전자기소자연구그룹) ;
  • 고중혁 (한국전기연구원 전자기소자연구그룹) ;
  • 송재성 (한국전기연구원 전자기소자연구그룹)
  • Published : 2003.07.10
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Abstract

Non-linear behaviors of multilayer piezoelectric ceramic actuator (MCA) were investigated under electrical and mechanical stress. DC 100 V bias was applied to the MCA to obtain displacement. Laser vibrometer, which using Doppler effect, was employed to characterize displacement caused by $d_{33}$ mode of MCA. To understand this non-linear behavior of MCA, displacement was measured and compared under different load states. By increasing load, electric field-induced strain and piezoelectric constant($d_{33}$) of MCA was decreased. We attribute this phenomenon to the domain wall motion and depoling of MCA under heavy load.

Keywords