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http://dx.doi.org/10.4313/JKEM.2017.30.5.284

Electrocaloric Effect of (Bi0.5Na0.5)TiO3 Ceramics  

Han, Jong-Dae (Department of Electrical Engineering, Semyung University)
Yoo, Ju-Hyun (Department of Electrical Engineering, Semyung University)
Jeong, Yeong-Ho (Korea National University of Transportation)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.30, no.5, 2017 , pp. 284-287 More about this Journal
Abstract
The electrocaloric effect in $0.94(Bi_{0.5}Na_{0.5})TiO_3+0.06KNbO3+0.9wt%$ G.F.ferroelectricceramics was observed in terms of the temperature change (${\Delta}T$) of the fabricated ceramics, Curie temperature $T_c$, and applied electric field. The specimens were fabricated by a conventional solid-state reaction. $T_c$ appeared near $165{\sim}170^{\circ}C$. The P-E hysteresis showed a tendency to slim down with a temperature increase and finally was slimmest near $150^{\circ}C$. With the increase of temperature, the polarization revealed a gradual decrease, and a sharp decline near $T_c$. When an electric field of 45 kV/cm was applied, the largest polarization was shown. The maximum value of the temperature change (${\Delta}T=0.31^{\circ}C$) was obtained at $165^{\circ}C$ under an applied electric field of 45 kV/cm.
Keywords
Electrocaloric effect; ECE; PZT; P-E hysteresis loops; Temperature change; ${\Delta}T$;
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Times Cited By KSCI : 1  (Citation Analysis)
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