(重慶大學(xué) 材料科學(xué)與工程學(xué)院，重慶 400044)
摘 要: 采用交流阻抗譜法，系統(tǒng)測(cè)試TiO2-FeO-X(SiO2,CaO,MgO)三元高鈦渣導(dǎo)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(dǎo)率逐漸升高，電導(dǎo)率值在40~187 S/cm之間。TiO2-FeO-X(SiO2,CaO,MgO)三元高鈦渣電導(dǎo)率在高溫下受電子-離子導(dǎo)電混合控制，具有明顯的半導(dǎo)體性質(zhì)，并且CaO、SiO2、MgO氧化物的加入可以降低鈦渣電導(dǎo)率。X射線(xiàn)衍射分析結(jié)果和熱力學(xué)計(jì)算結(jié)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(guān)鍵字: 高鈦渣；電導(dǎo)率；電子導(dǎo)電；熔體結(jié)構(gòu)
（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
