BaTiO3基NTC热敏陶瓷的显微组织和电性能的研究  

Microstructure and electrical properties of BaTiO3-based NTC ceramics

作　　者：李旭琼[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《功能材料》2007年第A02期595-597,共3页Journal of Functional Materials

基　　金：Supported by Guangxi Provincial Natural Science Foundation of China（GKZ0447092）.

摘　　要：研究中首次发现通过BaBiO3掺杂的BaTiO3基陶瓷在较宽的温度范围具有典型的NTC效应。研究了BaBiO3掺杂对BaTiO3基陶瓷的相组成、显微组织和电性能的影响规律。结果表明烧结体中的相由钙钛矿结构BaTiO3和单斜结构的BaBiO3组成。样品的平均晶粒尺寸随BaBiO3含量的增加而变大。随着BaTiO3基陶瓷中BaBiO3掺杂量的增加，材料的ρ25和β25/125不断减小。In our research it was firstly found that BaTiO3 materials doped with BaBiO3 compounds only showed NTC effect in wide temperature scale. The effect of the composition on the microstructure and electrical properties of BaTiO3-based NTC thermistors was studied. Major phases present in the sintered bodies were the BaTiO3 compounds with a perovskite structure and BaBiO3 compounds with a monoclinal structure. The average grain size of the samples increased with increasing BaBiO3 contents. It is apparent that the values of P25 and B25/125 constant decreased with an increase in BaBiO3 content.

关 键 词：NTC BATIO3 显微组织 电性 

分 类 号：O611.4[理学—无机化学]