摘要
研究了ＴｉＯ＿２粉体晶型结构对ＢａＴｉＯ＿３基ＰＴＣＲ材料电阻温度系数的影响。并讨论了ＢａＴｉＯ＿３基介质材料相变扩张与其相应ＰＴＣＲ材料温度系数之间的关系。指出在一定温度下对ＴｉＯ＿２粉体进行高温处理、完成其锐钛矿向金红石的相转变后，用其制备的ＰＴＣＲ材料的温度系数可显著提高。
The influences of crystalline structure of TiO2powders on the temperature coefficient ofresistance of BaTiO3- based PTCR materials are investigated.The relationship between tbediffuse phase transition and the temperature coefficient of resistance of BaTiO3- based materi-als is also studied.It is concluded that,when the anatase TiO2 is heated at a high tempera-ture and converted into rutile crvstalline powders, the temperaure coefficient of rcsistance ofBaTiO3- based PTCR materials prepared will be rcmarkably increascd.
出处
《华中理工大学学报》
CSCD
北大核心
1995年第3期48-51,共4页
Journal of Huazhong University of Science and Technology
基金
国家八五攻关课题
关键词
粉体晶型
PTCR
半导体陶瓷材料
二氧化钛
crystalline structure of TiO2 powders
PTCR materials
diffuse phase transi-tion
temperaure coefficient of resistance
