Electric Field-Induced Phase Transition Behaviors, Thermal Depolarization, and Enhanced Pyroelectric Properties of (Pb0.97La0.02)(ZrxSn0.89−xTi0.11)O3 Ceramics

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• 作者：Fangping Zhuo ; Qiang Li ; Jinghan Gao ; Yujie Wang ; Qingfeng Yan ; Yiling Zhang and Xiangcheng Chu
• 刊名：Journal of the American Ceramic Society
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：99
• 期：6
• 页码：2047-2054
• 全文大小：1874K
• ISSN：1551-2916

文摘

(Pb_0.97La_0.02)(Zr_xSn_0.89−xTi_0.11)O₃ (x = 0.60, 0.62, 0.64, 0.66, 0.68, 0.70, 0.72, and 0.74) ceramics with the compositions in tetragonal antiferroelectric (AFE) region, near the morphotropic phase boundary, were prepared by using the conventional solid-state reaction process. Their electric field-induced phase transitional behaviors, composition- and temperature-dependent dielectric, depolarization, and pyroelectric properties were investigated systematically. The AFE to ferroelectric phase switching field E_A-F decreased with increasing x, while depolarization temperature T_d increased with a linear relationship of T_d = 842x-483. Enhanced pyroelectric coefficient with a value of 12.1 μC/cm²/K was obtained at 88°C for the ceramics with x = 0.68, which was four times larger than the reported values. Composition-dependent pyroelectric response over 24°C–140°C was realized by changing x from 0.60 to 0.74. The results also suggested that the enhanced pyroelectric response near T_d was accompanied by a release of large P_r, caused by an induced ferroelectric to AFE phase transition.