Effects of BaF_2 on Preparing Mullite with Sludge from the Aluminum Profile Factory and Pyrophyllite  

作　　者：陈永瑞 阮玉忠 曾景旭 陈奇俤 杨超 

机构地区：[1]Material Science and Engineering School (at New Campus), Fuzhou University

出　　处：《Chinese Journal of Structural Chemistry》2010年第11期1697-1701,共5页结构化学（英文）

基　　金：Supported by the Fujian Provincial Development and Reform Commission

摘　　要：In this study, sludge from the aluminum profile factory and pyrophyllite were used as major raw materials to prepare mullite. Through determining optimum formula, the optimum calcination temperature and optimum temperature retention time as well as the effects of BaF2 mineralizer on the crystal structure, microstructure and properties of mullite were studied and the optimum BaF2 mineralizer dosage was determined. With XRD and SEM methods, the crystal structure and microstructure of each sample were characterized. With Rietveld Quantification method, crystal phase content in each sample was determined and properties of each sample were tested. Based on the comprehensive analysis result, it was determined that optimum BaF2 dosage was 0.5%, the fairly good calcination temperature was 1550 ℃, and the corresponding mullite solid solution content was 95.8%.In this study, sludge from the aluminum profile factory and pyrophyllite were used as major raw materials to prepare mullite. Through determining optimum formula, the optimum calcination temperature and optimum temperature retention time as well as the effects of BaF2 mineralizer on the crystal structure, microstructure and properties of mullite were studied and the optimum BaF2 mineralizer dosage was determined. With XRD and SEM methods, the crystal structure and microstructure of each sample were characterized. With Rietveld Quantification method, crystal phase content in each sample was determined and properties of each sample were tested. Based on the comprehensive analysis result, it was determined that optimum BaF2 dosage was 0.5%, the fairly good calcination temperature was 1550 ℃, and the corresponding mullite solid solution content was 95.8%.

关 键 词：CaF2 mineralizer mullite solid solution crystal structure microstructure property 

分 类 号：O631.3[理学—高分子化学]