BaTiO_3-Bi_(0.5)K_(0.5)TiO_3高温无铅PTCR陶瓷的制备  

Fabrication of Ba TiO_3-Bi_(0. 5)K_(0. 5)TiO_3 High Temperature Lead-free PTCR Ceramics

作　　者：冷森林 祝娅[1] 宋谋胜[1] 贾飞虎[1] 

机构地区：[1]铜仁学院材料与化学工程学院,贵州铜仁554300

出　　处：《广州化工》2015年第19期49-50,110,共3页GuangZhou Chemical Industry

基　　金：贵州省教育厅项目(黔教合人才团队字[2014]40);贵州省大学生创新项目(201310665002)

摘　　要：作为钙钛矿结构的Bi0.5K0.5Ti O3,其居里温度(Tc)高达380℃,是极好的高温无铅PTCR(Positive temperature coefficient of resistance)陶瓷的制备材料。研究制备了Y2O3掺杂的高温无铅(1-xmol%)Ba Ti O3-xmol%Bi0.5K0.5Ti O3(简写为BT-x BKT,x=8,10)PTCR陶瓷,材料的居里温度达到190℃,电阻突跳约2个数量级。采用扫描电镜研究了陶瓷的微观形貌,并且分析了材料的微观结构对材料耐压特性的影响。The Bi0. 5 K0. 5 TiO3 is a perovskite structure material. Because Bi0. 5 K0. 5 TiO3 has the high curie temperature （ Tc=380 ℃） , it is an excellent high-temperature lead-free material for PTCR （ Positive temperature coefficient of resistance） ceramics. Y2 O3 doped high temperature lead-free （1-xmol%） BaTiO3-xmol%Bi0. 5 K0. 5 TiO3 （ abbreviated to BT-xBKT, x=8, 10） PTCR ceramics were prepared, the Tc of BaTiO3-Bi0. 5 K0. 5 TiO3 ceramics can be improved up to 190 ℃, and the PTC effect was about 2 orders of magnitude. The microstructure of the ceramic was studied by scanning electron microscopy （ SEM ） , and the influence of microstructure on the breakdown voltage characteristic of the ceramic was analyzed.

关 键 词：高温 无铅 PTCR陶瓷 制备 

分 类 号：TQ174[化学工程—陶瓷工业]