无限微热源法合成β-SiC粉体  

Study on Synthesizing β-SiC Ultrafine Powder by Lnfinite-mini-heat Sources Furnace

作　　者：华小虎[1] 田晓敏[1] 代智杰[1] 伊伦[1] 王晓刚[1] 

机构地区：[1]西安科技大学材料科学与工程系,陕西西安710054

出　　处：《中国粉体技术》2007年第3期4-6,共3页China Powder Science and Technology

基　　金：国家自然科学基金项目;编号:5174046;宁夏回族自治区科技攻关项目

摘　　要：采用无限微热源法从原料、原料级配、供电功率和供电时间对合成β-SiC微粉产品的产率和品率的影响进行了探讨,并对合成β-SiC微粉产品进行了粒度测试和XRD分析。研究表明,无烟煤和石墨作碳源合成所得β-SiC微粉品率和产率比石油焦和石墨作碳源高,且晶相生成比较完整;原料粒度越细,产物粒度越细;合理控制给电功率和足够的保温时间是合成的关键;产物产率达25.63%,一级品率达77.63%,一级和二级总品率达98%。Using the infinite-mini-heat sources furnace, the effects of the raw materials, gradation of raw materials,electric power and time on productive rate of β-SiC ultrafine powder were studied, the grain size and XRD of β-SiC ultrafine powder is analyzed too. The results show that the productive rate of β-SiC ultrafine powder synthesized by anthracite coal and graphite as carbon source is higher than petrol coke and graphite, and the phase of crystal is perfect. The less the size of raw materials is, the less the grain size of product is. The electric power must be controlled properly and enough holding time should be given, and the productive rate is 25.63% , the grading of first quality ware is 77.63% ,the total grading of first and second quality ware is 98%.

关 键 词：无限微热源法 β-SiC微粉 产率 品率 

分 类 号：TD921.2[矿业工程—选矿]