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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     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) 
关键词:钛酸锶钡 两步水热法 电卡效应 多层陶瓷电容器 
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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