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。
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 contents 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 soft-ware （Rietveld Quantification） was applied 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 microstructure 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.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2007年第8期1092-1096,共5页
Journal of The Chinese Ceramic Society
基金
国家"863"计划(2003AA322020)
福建省发改委资助项目
福州大学人才基金资助项目
关键词
铝厂污泥
莫来石
矿化剂
固溶体
aluminum waste slag
mullite
mineralizer
solid solution
