전계 인가에 따른 PLZT 강유전체의 유전특성 및 전기열량 효과

Kim, You-Seok;Yoo, Ju-Hyun;Jeong, Yeong-Ho

  • 투고 : 2016.02.13
  • 심사 : 2016.02.22
  • 발행 : 2016.03.01


In this study, in order to develop relaxor ferroelectric ceramics for refrigeration device application with large electrocaloric effect, PLZT(8/65/35) composition was fabricated using conventional solid-state method. The Curi temperature of this composition PLZT ceramics was $230^{\circ}C$, and the P-E hysteresis loops of the PLZT ceramics as a fuction of temperature became slim by degrees with higher temperatures. The maximum value of ${\Delta}T$ of $0.243^{\circ}C$ in ambient temperature of $215^{\circ}C$ with 30 kV/cm was appeared. It is considered that PLZT ceramics possess the possibility of refrigeration device application.


Electrocaloric effect;Ferroelectric ceramics;PLZT;P-E hysteresis loops


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연구 과제 주관 기관 : 한국교통대학교