硅酸盐学报

基于水热合成粉末的Ba0.6Sr0.4TiO3厚膜陶瓷及其大电卡效应

作者：邹艺轩黄咏安钟米昌姚英邦陶涛梁波鲁圣国

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(12):0-0

DOI：

摘要：

通过两步水热法制备了纳米钛酸锶钡(Ba0.6Sr0.4TiO3)粉体，利用流延成型法得到钛酸锶钡厚膜生坯，通过叠压、静水压、排胶及烧结后得到厚膜陶瓷。使用X射线衍射仪、扫描电子显微镜、精密阻抗分析仪和铁电测试平台对其晶体结构、形貌、介电性能以及铁电性能进行了表征。结果表明：两步水热法得到的钛酸锶钡纳米粉体形貌为均匀的准立方体，平均颗粒尺寸为50 nm。烧结成厚膜陶瓷后平均晶粒尺寸达到2.2 ?m。通过电滞回线分析得到不同温度和电场下的极化强度，利用Maxwell关系得到电卡效应的绝热温变在温度253 K以及电场5 MV/m下达到0.62 K。

基金项目：

国家自然科学基金(51372042，51872053)；国家自然科学基金–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(2015A030308004)；广东省教育厅重大基础研究培育项目(2014GKXM039)资助。

作者简介：

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