以ＺｒＯ２（ＭｇＯ）为固体电解质、（ＭｇＯ＋ＭｇＦｅ２Ｏ４）为辅助电极材料组成的测定熔融高冰镍中铁含量的电化学传感器，其电池式为：Ｍｏ，ＭｏＯ２｜ＺｒＯ２（ＭｇＯ）｜ＭｇＯ＋ＭｇＦｅ２Ｏ４｜［Ｆｅ］ｍａｔｅ，Ｍｏ。传感器在铁含量小于６．２％（质量）的范围内测得的数值与化学分析值基本一致。介绍了温度在１４８３～１５６０Ｋ之间，融体组成一定时，传感器电动势与温度的关系，并据此得出了铁活度系数与温度的关系式，最后给出了由传感器电动势计算高冰镍中铁的质量百分含量的公式。 The electrochemical sensor with ZrO2 (MgO) as solid electrolyte and (MgO + MgFe2O4) as auxiliary electrode material for determination of iron content in molten high iced nickel has the following cell type: Mo, MoO2 | ZrO2 (MgO) | MgO + MgFe2O4 | [Fe] mate, Mo . The value of the sensor measured in the range of less than 6.2% (mass) iron content is basically the same as the chemical analysis value. The relationship between the electromotive force of the sensor and the temperature is introduced when the temperature is between 1483 and 1560K and the composition of the melt is constant. The relationship between the iron activity coefficient and the temperature is derived from the result. Finally, Mass percent of the formula.