石墨粒径对石墨-陶瓷电阻电性能的影响  

Influence of Graphite Partical Size on the Electrical Properties of Graphite-Ceramic Resistance

作　　者：王俊波[1] 邱太洪[1] 徐鑫[1] 陈维 

机构地区：[1]广东电网公司佛山供电局,广东佛山528000 [2]西安交通大学,西安710049

出　　处：《电瓷避雷器》2013年第5期97-100,共4页Insulators and Surge Arresters

摘　　要：石墨-陶瓷电阻的电阻率具有负温度系数效应(NTC效应),石墨粒径直接影响到电阻率和NTC效应。研究表明:石墨中位粒径(D50)呈级差为2μm的等差数列减小时的电阻率成指数规律降低;随着温度的上升,石墨NTC效应逐渐减弱;石墨-陶瓷电阻的NTC效应随着石墨粒径的减小而减弱。The resistivity of graphitep-ceramic resistance have negative temperature coefficient effect （NTC effect ）. The partical size of graphite has direct effect on resisitivity and NTC effect. The results show that the resistivity exponentially decreased as the partical size of graphite graded as arithmetic sequence of 2μm. With the temperature increased, the NTC effect decreased. NTC effect of graphite resistance decreases with the reduction of the particle size of the graphite.

关 键 词：石墨 陶瓷 粒径 电性能 

分 类 号：TM28[一般工业技术—材料科学与工程]