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http://dx.doi.org/10.4313/JKEM.2013.26.11.801

Electrocaloric Effect and Hystersis Properties of Pb-free Ferroelectric (Ba0.85Ca0.15)(Ti0.92Zr0.08)O3 Ceramics  

Kim, You-Seok (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)
Lee, Jie-Young (School of Computer Science, Semyung University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.26, no.11, 2013 , pp. 801-805 More about this Journal
Abstract
In this study, electrocaloric effects of Pb-free $(Ba_{0.85}Ca_{0.15})(Ti_{0.92}Zr_{0.08})O_3$ ferroelectric ceramics were investigated and discussed using the characteristics of P-E hysteresis loops at wide temperature range from room temperature to $140^{\circ}C$. The remnant polarization $P_r$ and coercive field $E_c$ were decreased with increasing temperature. The temperature change ${\Delta}T$ by the electrcaloric effect was calculated by Maxwell's relations, and reached the maximum of ~0.15 at $120^{\circ}C$ under applied electric field of 30 kV/cm.
Keywords
Ferroelectric ceramics; Electrocaloric; Remnant polarization;
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