(重慶大學 材料科學與工程學院，重慶 400044)
摘 要: 采用交流阻抗譜法，系統(tǒng)測試TiO2-FeO-X(SiO2,CaO,MgO)三元高鈦渣導電性隨各成分和溫度的變化規(guī)律。研究表明：隨溫度升高，高鈦渣電導率逐漸升高，電導率值在40~187 S/cm之間。TiO2-FeO-X(SiO2,CaO,MgO)三元高鈦渣電導率在高溫下受電子-離子導電混合控制，具有明顯的半導體性質，并且CaO、SiO2、MgO氧化物的加入可以降低鈦渣電導率。X射線衍射分析結果和熱力學計算結果均表明高鈦渣凝固后的主要物相為黑鈦石(Fe,Ca,Mg)xTiyO5和金紅石TiO2。
關鍵字: 高鈦渣；電導率；電子導電；熔體結構
（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
