Electro-caloric effect in lead-free ferroelectric Ba_{1∿span style='font-style: italic'>x}Ca_x(Zr_0.1Ti_0.9)_0.925 Sn_0.075O₃ ceramics

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• 作者：H. Kaddoussi^a ; ^b ; A. Lahmar^a ; ^{abdel.ilah.lahmar@u-picardie.fr" class="auth_mail" title="E-mail the corresponding author} ; Y. Gagou^a ; J.-L. Dellis^a ; H. Khemakhem^b ; M. El Marssi^a
• 关键词：BCZTSn ; Dielectric ; Ferroelectric ; Pyroelectric ; Electrocaloric responsivity
• 刊名：Ceramics International
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：41
• 期：10
• 页码：15103-15110
• 全文大小：2443 K

文摘

The influence of the incorporation of Calcium in lead-free ferroelectric Ba(Zr_0.1Ti_0.9)_0.925Sn_0.075O₃ perovskite on its structural phase transition, dielectric properties, ferroelectric behavior, pyroelectric current, and electrocaloric effect was investigated. X-ray diffraction study allowed the identification of a continuous solid solution in the composition range 0≤x≤20 mol%. Dielectric and pyroelectric measurements permitted to determine the exits phase transition. The adiabatic temperature change ∆T was calculated by the indirect method from the thermal variation of P–E hysteresis loops using the Maxwell relation. The incorporation of Calcium was found to increase the electrocaloric responsivity within a broad range of temperature with an optimum of ΔT/ΔE=0.27 K mm/kV observed for x=15 mol%.