不同TiO_2晶型对PTCR启动元件恢复特性的影响  

The Influences of Different Crystalline Structure TiO 2 Powders on PTC Starter's Resume Time

作　　者：卢红霞[1] 张锐[1] 郑英姿[1] 谢志强 卢素霞 

机构地区：[1]郑州工业大学材料科学与工程系,河南郑州450002 [2]河南思达电子仪器股份有限公司,河南郑州450001

出　　处：《郑州工业大学学报》1999年第3期45-46,53,共3页Journal of Zhengzhou University of Technology

基　　金：河南省自然科学基金 资;清华大学先进陶瓷与精细工艺开放实验室资助

摘　　要：分析了国产及日本产 Ｐ Ｔ Ｃ Ｒ（ 热敏电阻） 元件作为电冰箱压缩启动器时，其恢复时间差异的原因．实验时分别取日本产金红石结构和国产锐钛矿结构的 Ｔｉ Ｏ２ 为原料，与同种国产 Ｂａ Ｃ Ｏ３ 粉末反应，采用同样的电子陶瓷烧结工艺制备 Ｐ Ｔ Ｃ Ｒ 样品．分析启动元件电阻－ 温度特性曲线发现：国产 Ｐ Ｔ Ｃ Ｒ 元件高温时的温度系数α Ｔ 低于日产样品，国产启动器恢复时间较长是由于制备国产样品的主要原料 Ｔｉ Ｏ２是锐钛矿结构，而日产样品则是金红石结构． Ｔｉ Ｏ２ 粉体晶型结构对 Ｂａ Ｔｉ Ｏ３ 基 Ｐ Ｔ Ｃ ＲPTC Resistor is one kind of the new electronic devices.This paper discusses the difference of starter's resume time when PTC elements are used as refrigerator compressing starters.Japanese rutile and internal anatase are combined with the same BaCO 3 in laboratory,and sintered at the same temperature.After analysing the PTC elements'resistivity-temperature characteristic,we find that the α T in high temperature of internal PTC elements is lower than that of Japanese,the conclusion that the PTC starters'resume time has relationship with the raw material TiO 2's crystalline is reached.It shows that the crystalline structure of TiO 2 powders has influences on the temperature coefficient of resistance of BaTiO 3-based PTCR materials.

关 键 词：二氧化钛 热敏电阻 恢复时间 启动元件 电冰箱 

分 类 号：TM925.203[电气工程—电力电子与电力传动] TM573.4