硅材料除硼处理  

Treatment to Remove Boron from Silicon

作　　者：何念银[1] 艾韬[1] 胡迎飞[1] 郑金标[1] 

机构地区：[1]华东理工大学材料学院,上海200237

出　　处：《化学世界》2009年第4期197-199,204,共4页Chemical World

摘　　要：对金属硅进行除硼处理,以解决定向凝固提纯硅对分凝系数大的硼的分离效果不明显难题。高温条件下向经过酸处理的硅粉通入蒸汽,硼经扩散与蒸汽反应。通过实验确定了硅粉粒径、反应温度和反应时间与除硼效果的关系。To remove boron from metal-grade silicon had to solve the problem that the separation of boron in directional solidification was not obvious because of the large segregation coefficient of boron. Adding steam to acid-treated silicon powder at high-temperature, boron could diffuse, react with steam and ultimately be removed. The relations between silicon particle size, temperature, reaction time-and the efficiency of removing boron were established through experiments.

关 键 词：水蒸汽 硼 太阳能 多晶硅 

分 类 号：TF111.31[冶金工程—冶金物理化学]