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"Temperature change"

Electrocaloric Effect of (Bi0.5Na0.5)TiO3 Ceramics
Jong-dae Han, Ju-hyun Yoo, Yeong-ho Jeong
J Korean Inst Electr Electron Mater Eng 2017;30(5):284-287.   Published online May 1, 2017
DOI: https://doi.org/10.4313/JKEM.2017.30.5.284
The electrocaloric effect in 0.94(Bi0.5Na0.5)TiO3+0.06KNbO3+0.9 wt% G.F.ferroelectricceramics was observed in terms of the temperature change (ΔT) of the fabricated ceramics, Curie temperature Tc, and applied electric field. The specimens were fabricated by a conventional solid-state reaction. Tc appeared near 165∼170℃. The P-E hysteresis showed a tendency to slim down with a temperature increase and finally was slimmest near 150℃. With the increase of temperature, the polarization revealed a gradual decrease, and a sharp decline near Tc. When an electric field of 45 kV/cm was applied, the largest polarization was shown. The maximum value of the temperature change (ΔT=0.31℃) was obtained at 165℃ under an applied electric field of 45 kV/cm.
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