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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Dielectric and Electrocaloric Characteristics of PLZT(8/65/35) Ceramics as a Function of Sintering Temperature

PLZT(8/65/35) 세라믹스의 소결온도에 따른 유전 및 전기열량 특성

  • Kim, You-Seok (Department of Electrical Engineering, Semyung University) ;
  • Han, Jong-Dae (Department of Electrical Engineering, Semyung University) ;
  • Yoo, Ju-Hyun (Department of Electrical Engineering, Semyung University) ;
  • Jeong, Yeong-Ho (Department of Electrical Engineering, Korea National University of Transportation)
  • Received : 2016.06.15
  • Accepted : 2016.09.22
  • Published : 2016.10.01
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Abstract

In this study, in order to develop relaxor ferroelectric ceramics for refrigeration device application with large electrocaloric effect and low sintering temperature, PLZT(8/65/35) ceramics was fabricated using conventional solid-state method with the variation of sintering temperature ($1,050^{\circ}C$, $1,100^{\circ}C$, $1,200^{\circ}C$). The XRD pattern of all specimens indicated general perovskite structure with secondary phase. From the results of temperature dependence of dielectric constant, the $T_C$ (ferroelectric-paraelectric phase transition temperature) was shifted toward high temperature with increasing sintering temperature. When the specimen was sintered at $1,100^{\circ}C$, the optimal value of ${\Delta}T{\sim}0.349^{\circ}C$ in ambient temperature of $215^{\circ}C$ was appeared. It is considered that PLZT(8/65/35) ceramics possess the possibility of refrigeration device application.

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References

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