(北京科技大学固体电解质冶金测试技术国家专业实验室，北京 100083)
摘 要: 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]matte, 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。
关键字: 镍熔锍 铁传感器 固体电解质
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Abstract:An electrochemical Fe sensor with ZrO2(MgO) solid electrolyte and (MgFe2O4+MgO) auxiliary electrode material as the following formula has been developed: Mo, MoO2｜ZrO2(MgO)｜MgFe2O4+MgO｜[Fe]matte, Mo. The performances and measuring range of the sensor in matte were studied. The calculating equations of activity, activity coefficient and content of Fe in nickel matte were obtained from experimental data. The sensor was submitted to control the blowing end-point of ferro in converter process. During such in-plant tests it was confirmed that the stability of the sensor is excellent and it facilitates more accurate control of Fe contents at the blowing end-point of nickel matte.
Key words: nickel matte Fe sensor solid electrolyte
