不同烧结工艺Ba_(1-x)Sr_xTiO_3陶瓷结构与电学性能研究  

Structure and Electrical Properties of Ba_(1-x)Sr_xTiO_3 Ceramics with Various Sintering Processes

作　　者：李卓[1] 赵鹏[1] 薛晓辉[1] 李宗廷 王卓[1] 许磊[1] 樊慧庆[2] 

机构地区：[1]长安大学材料科学与工程学院,西安710064 [2]西北工业大学凝固技术国家重点实验室,西安710072

出　　处：《材料导报》2016年第16期55-59,共5页Materials Reports

基　　金：国家重点基础研究发展计划项目(2015CB655105);陕西省自然科学基础研究计划资助项目(2015JQ5190);西北工业大学凝固国家重点实验室开放课题资助项目(SKLSP201409);中央高校基本科研业务费专项资金资助项目(310831161006;310831151083)

摘　　要：通过传统固相法制备了不同锶含量的钛酸锶钡陶瓷,研究不同烧结温度和保温时间条件下钛酸锶钡陶瓷的物相、微观形貌、介电和铁电特性。结果表明,随烧结温度的升高和保温时间的延长,陶瓷的结晶度先增加后减少,其中1280℃烧结4h的陶瓷结晶度最好,而且随着Sr含量的增加其晶粒粒度减小,Pr下降,P-E回线变窄且倾斜,同时介电常数下降,且表现出一定的频率、温度弥散特征。The conventional solid state reaction process was employed to prepare the barium strontium titanate ceramics.The phase structure,morphology,dielectric properties and ferroelectric performance of the ceramics sintered at different temperatures with various holding time were investigated.The results showed that with the increase of sintered temperature and holding time,the crystallinity of the ceramics increased and then decreased,and the one sintered at 1280℃for 4hwas optimized.Also,with the increasing content of Sr,the grain size and Prdecreased,the P-Eloops became slim and sloped,and the dielectric properties decreased,accompanied by the diffusion features.

关 键 词：钛酸锶钡 烧结工艺 微观结构 介电性能 铁电性能 

分 类 号：TB34[一般工业技术—材料科学与工程]