烧结条件对TiO_2压敏陶瓷性能的影响  

Influence of Sintering Conditions on TiO_2 Varistor Ceramics

作　　者：陈妍妍[1] 邹敏[2] 王琪琳[2] 王晓燕[1] 张云[1] 王远[1] 

机构地区：[1]四川大学材料科学与工程学院,成都610064 [2]攀枝花学院生化系,攀枝花617000

出　　处：《四川有色金属》2008年第4期27-32,共6页Sichuan Nonferrous Metals

摘　　要：本文研究了烧结温度和保温时间对TiO2压敏陶瓷微观结构和电学性能的影响;用扫描电子显微镜(SEM)观察了样品的微观形貌;用X射线衍射(XRD)表征了样品的物相、晶体结构。结果表明:用一次直接烧结法制备的TiO2压敏陶瓷,以1350℃烧结2h样品的性能最佳,具有最优微结构和性能。烧结温度与保温时间两者之间在一定程度上相互制约,因此必须严格控制最高烧成温度和保温时间,在一定烧结条件下获得致密的微观结构以及较好的电学特性。Influences of sintering temperature and sintering time on microstructures and electrical properties of TiO2 varistors ceramics were investigated. Morphologies of TiO2 ceramics samples were characterized by scanning electron microscope （SEM）. The phase composition and crystal structure were researched by X- ray diffraction （XRD）. The results showed that TiO2 ceramics sintered at 1350℃ for 2h possessed fine microstructure and optimal electrical properties. There are strong condition restriction in the sintering temperature and duration time for top temperature. Therefore, ceramics with fine microstructure and electrical properties can be obtained by controlling sintering conditions effectively.

关 键 词：TIO2压敏陶瓷 显微结构 烧结温度 保温时间 

分 类 号：TG14[一般工业技术—材料科学与工程]