摘要
研究了陶瓷粉填充聚合物基过电流保护元件的导电性能、电阻-温度特性及微观形貌。随着陶瓷粉体积分数的增加,过电流保护元件的电阻逐渐降低;当陶瓷粉体积分数达到某一临界点时,过电流保护元件的电阻急剧下降;继续增加陶瓷粉体积分数,过电流保护元件的电阻的减小趋势变缓。随着温度的升高,过电流保护元件的电阻率逐渐增加;当温度接近聚合物熔融温度Tm时,导电网络被破坏,过电流保护元件的电阻率会大幅增加,产生电阻正温度效应;超过Tm后,过电流保护元件一直处于高阻状态。
The conductivity properties,resistance-temperature characteristic and microstructure of over-current protection on polymeric component filled by ceramic powder are investigated. The resistance of the over-current protection component decreases slowly with the increasing content of ceramic powder,and then decreases rapidly when the content of ceramic powder reaches a critical value. The resistivity of the over-current protection component increases slowly with the increasing temperature,and then increases rapidly when the temperature reaches the melting temperature of the polymer because of the destruction of the conductive networks.
出处
《仪表技术》
2015年第4期8-11,54,共5页
Instrumentation Technology
关键词
陶瓷粉
过电流保护元件
电性能
ceramic powder
over-current protection component
electrical properties
