纳米TiO_2添加剂对TiO_2压敏陶瓷性能的作用  

Influence of Nano-Titania Additive on the Property of TiO_2 Varistor Ceramics

作　　者：陈海芳[1] 甘国友[1] 严继康[1] 张小文[2] 

机构地区：[1]昆明理工大学材料与冶金工程学院,昆明650093 [2]昆明物理研究所,昆明650223

出　　处：《半导体技术》2006年第2期102-104,118,共4页Semiconductor Technology

基　　金：云南省科技攻关项目(2002GG09)

摘　　要：为了改善TiO2压敏陶瓷材料的电学性能,通过添加少量的纳米TiO2,使其压敏电压有了明显的降低,非线性系数有了明显的提高,并对其原因进行了合理分析。结果表明,随着烧结温度的提高, 总趋势是压敏电压下降,非线性系数提高。当添加5％纳米TiO2并在1400℃烧结时,样品显示出较好的压敏特性:V1mA=4．66V／mm,a=4．73和εr=1．1 9×104。The influence of nano-titania additive on the electric properties of TiO2 varistor ceramic is investigated. The results show that the varistor voltage decreases and the non-linear constant of this ceramic is improved by doping nano-titania. An analysis is made that with the increase of sintering temperature, voltage of TiO2 varistor decreases and its non-linear constant increases. The results show that the lower varistor voltage, V1mA =4.66 V/mm, the better non-linear coefficient, a =4.73, and higher dielectric constant, ε r= 1.19 × 10^4 when sintered at 1400℃ and doped 5% nano-titania.

关 键 词：二氧化钛 压敏陶瓷 添加剂 烧结温度 

分 类 号：TN379[电子电信—物理电子学]