磁化水配料对TiO_2压敏陶瓷电性能和微观结构的影响  

EFFECT OF MAGNETIZED WATER ON THE ELECTRIC PROPERTIES AND MICROSTRUCTURE OF TiO_2-BASED VARISTOR CERAMICS

作　　者：李红耘[1] 张玉春[2] 罗绍华[1] 尧巍华[1] 唐子龙[1] 张中太[1] 庄严 熊西周 

机构地区：[1]清华大学材料科学与工程系,北京100084 [2]清华大学环境科学与工程系,北京100084 [3]广州新日电子有限公司,广州510335

出　　处：《硅酸盐学报》2003年第3期250-253,共4页Journal of The Chinese Ceramic Society

摘　　要：研究了使用磁化水配料对TiO2 压敏陶瓷电性能和微观结构的影响。电性能测量及SEM和XRD微观结构分析结果表明 :磁化水配料制备的TiO2 压敏电阻具有较低的压敏电压和较高的非线性指数α。材料的主晶相为金红石相 ,由Ce ,Si,Ti组成的Perrierite第二相均匀分布在晶界区域。因此 ,采用磁化水配料可以改善材料的工艺性能和陶瓷烧结体的微观结构 。The influence of magnetized water on the microstructure and electrical properties of TiO_2 varistor ceramics was investigated with the aids of SEM, XRD and electrical property measurement. It is found that lower varistor voltage and higher non_linear coefficient α can be achieved for TiO_2 varistor ceramic by using magnetized water. The XRD and SEM results show that the main crystal phase is rutile TiO_2, which is surrounded by the second phase Perrierite composed of Ce, Si and Ti in the grain boundary region. It is proposed that the processing property and microstructure of TiO_2 varistor ceramics can be improved by using magnetized water resulting in improving the electrical properties of the ceramics.

关 键 词：氧化钛 压敏电阻 磁化水 微观结构 电性能 

分 类 号：TB321[一般工业技术—材料科学与工程]