(1. 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;
2. 上海大学材料科学与工程学院,上海200072)
摘 要: 利用电化学交流阻抗谱法对CaO-SiO2-Al2O3-FeOx渣系的电导进行了研究。结果表明,随着渣相中氧化亚铁浓度的增大, 温度系数逐渐减小; 三价铁离子对电导率的影响随渣相中铁氧化物浓度的增大而显著, 但当铁氧化物浓度小于20%(摩尔分数)时, 三价铁离子对电导率的影响较小;CaO-SiO2-Al2O3 - Fe2O3渣系中存在电子导电,电子电导率约为10-3~10-2S·cm-1。
关键字: 炉渣; 电导率; 阻抗谱
(1. Laboratory on Solid Electrolytes and Metallurgical Testing Techniques, University of Science and Technology Beijing, Beijing 100083, P.R.China;
2. School of Materials Science and Engineering, Shanghai University, Shanghai 200072, P.R.China)
Abstract:The electrochemical AC impedance for measuring the resistance of CaO-SiO2-Al2O3-FeOx slag system was worked out. The experimental results suggest that the temperature coefficient decreases as the content of iron oxide in slag increases. The effect of ferric ion on electrical conductivity is more pronounced at high iron oxide concentrations, but when the mole fraction of iron oxide is below 20%, the effect of ferric ions can be neglected. The experimental data show also that electronic conductance exists in CaO-SiO2-Al2O3 - Fe2O3 slag system. It can be estimated that electronic conductance is in the range of 10-3S·cm-1 to 10-2 S·cm-1.
Key words: slags; conductivity; complex impedance