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石墨粒径对石墨-陶瓷电阻电性能的影响

, PP. 97-100

Keywords: 石墨,陶瓷,粒径,电性能

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Abstract:

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。

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