【作者】 吴任平； 于岩； 阮玉忠；

【Author】 WU Renping YU Fan RUAN Yuzhong (College of Materials Science and Engineering,Fuzhou University,Fuzhou 350002,China)

【机构】 福州大学材料学院；

【摘要】 利用铝型材厂工业污泥和铁合金厂硅微粉为主要原料,以氟化钡（BaF₂）和二氧化钛（TiO₂）分别作为矿化剂合成莫来石。探讨矿化剂的作用机理及对莫来石微观结构的影响。采用 X 射线衍射和扫描电子显微镜表征合成样品的晶相与显微结构。用 Rietveld Quantification 半定量分析软件计算各晶相的含量。结果表明：合成样品中莫来石以固溶体形式存在。当 BaF₂添加量为2．5%（质量分数,下同）时,莫来石固溶体的含量达95%,其晶相呈粒状和柱状。TiO₂最佳添加量为1．0%,莫来石固溶体最高含量可达96%,其晶相呈细小的针状。更多还原

【Abstract】 Waste aluminum slag and silica powder from ferroalloy plant as the main raw materials and BaF₂ or TiO₂ as mineralizers respectively,were used to synthesize mullite.The reaction mechanism of mineralizers（BaF₂ and TiO₂）and the influence of the con- tents of mineralizers on the microstructure of mullite was studied.The crystal phase and microstructure of sample synthesized were characterized by X-ray diffraction and scanning electron microscopy.Semi-quantitative software（Rietveld Quantification）was ap- plied to calculate the content of each crystalline phase.The results show that mullite exists as a solid solution form.When 2.5%（in mass,the same below） BaF₂ was added,the content of mullite in the synthesized sample reached the highest value（95%）.The micro- structure of the sample are mainly in granular and column shapes.Furthermore,when 1.0% TiO₂ is added,the content of mullite reaches to 96%,and the mullite crystal grains are in small needlelike shapes.更多还原