(重庆大学 材料科学与工程学院，重庆 400044)
摘 要: 采用交流阻抗谱法，系统测试TiO2-FeO-X(SiO2,CaO,MgO)三元高钛渣导电性随各成分和温度的变化规律。研究表明：随温度升高，高钛渣电导率逐渐升高，电导率值在40~187 S/cm之间。TiO2-FeO-X(SiO2,CaO,MgO)三元高钛渣电导率在高温下受电子-离子导电混合控制，具有明显的半导体性质，并且CaO、SiO2、MgO氧化物的加入可以降低钛渣电导率。X射线衍射分析结果和热力学计算结果均表明高钛渣凝固后的主要物相为黑钛石(Fe,Ca,Mg)xTiyO5和金红石TiO2。
关键字: 高钛渣；电导率；电子导电；熔体结构
（School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China）
Abstract:The effects of temperature and slag compositions on electrical conductivity of TiO2-FeO-X(SiO2,CaO,MgO) ternary high titania slag were measured accurately by AC impedance method. The results show that the electrical conductivity of high titania slag, which is vary from 40 S/cm to 487 S/cm, increases with the increasing temperature. The electrical conductivity of TiO2-FeO-X(SiO2,CaO,MgO) ternary high titania slag is hybrid controlled by the electron-ionic conduction, which possesses obvious semiconductor property. The additions of SiO2, CaO and MgO can decrease the electrical conductivity of high titania slag. X-ray diffraction analysis results and thermodynamic calculated results show that the predominate phase of the high titania slag are anosovite ((Fe, Ca, Mg)xTiyO5) and rutile(TiO2).
Key words: high titanium slag; electrical conductivity; electron conduction; melt structure
