Mg－Mn－Fe－O系热敏电阻变B值特性的研究

Study on the Variable B Value Character of Mg Mn Fe O Thermister

Ｍｇ－Ｍｎ－Ｆｅ－Ｏ系热敏电阻经还原处理后，具有低Ｂ高阻电学特性，不同于一般的ＮＴＣ热敏电阻，其Ｂ值随温度增加呈较大幅度的连续性增加。研究了还原条件、材料组分及烧结温度对样品电特性的影响。

Mg Mn Fe O thermister features high resistance and low material constant B value by reduction.Different from normal NTC thermister,its B value increases continuously by a big extent with rising temperature.This article studies the effect of reduction condition,material constituent, and sintering temperature on the electrical character.It also explains the mechanism of variable B value character of Mg Mn Fe O thermister.