硅酸盐学报

固相反应法制备高储能密度及高储能效率的驰豫型反铁电PLZT陶瓷

作者：钟米昌路标邹艺轩姚英邦梁波陶涛鲁圣国

单位：(广东省智能材料和能量转化器件工程技术研究中心广东省功能软凝聚态物质重点实验室广东工业大学材料与能源学院广州 510006)

分类号：TQ174

出版年,卷(期):页码：2019,47(6):0-0

DOI：

摘要：

通过固相反应法制备了锆钛酸铅镧(PLZT)陶瓷并研究了其储能特性。根据室温下PLZT相图制备了反铁电相和弛豫型铁电体相相界附近的PLZT陶瓷，并选择储能密度和储能效率相对较高的组分通过流延法制备了陶瓷厚膜，并通过电滞回线计算样品的储能密度和储能效率。结果表明：所制备的样品同时表现出反铁电特性和弛豫型铁电体特性，样品室温下的储能密度能达到0.61 J/cm3，同组分厚膜陶瓷室温下储能密度能达到1.414 J/cm3；样品储能效率能达到94.4%；且样品的储能密度和储能效率随温度的变化表现出不同的变化趋势。

Lead lanthanum zirconate titanate (PLZT) ceramics were prepared by a solid-state reaction method, and the enengy storage properties of PLZT were investigated via the polarization-electric field(P–E) hysteresis coops. The PLZT compositions were designed near to the relaxor ferroelectric and antiferroelectric region according to the room-temperature phase diagram of PbZrO3–PbTiO3–La2O3 system. The compositions with high energy storage density and high energy storage efficiency was chosen to prepare ceramic thick film by a tape-casting method. The composition and microstructure of the samples were analyzed by X-ray diffraction and scanning electron microscopy. The electrical properties of the samples were characterized by a precision impedance analyzer and a ferroelectric tester, respectively. The energy storage density and energy storage efficiency of the samples were calculated according to the hysteresis loop. The results show that samples manifest antiferroelectric and relaxor ferroelectric characteristics, simultaneously. The energy storage density of is 0.613 J/cm3 for bulk ceramic and 1.414 J/cm3 for thick film ceramic counterpart at room temperature, and the energy storage efficiency of sample can reach 94.4%. The energy storage density and efficiency show different tendencies with respect to the temperature.

基金项目：

国家自然科学基金面上项目(51372042，51872053)；国家自然科学基金委-广东省联合基金(U1501246)；广东省自然科学基金重大基础研究培育项目(2015As0308004)。

作者简介：

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