Research on boron removal of metallurgical grade silicon with silica by ozidizing refining
The principle of reactions between the boron in metallurgical grade silicon and SiO2 was theorortically analyzed. The metallur gical grade silicon doped with SiO2 was tried to refine in the induction furnace under the humid argon atmosphere. The systematic experi ments were carried out in the different holding times and ratios. The boron content of samples refined was detected by the inductively cou pled plasma (ICP). The results show that the boron content of silicon is reduced from 16 ppmw to lppmw below,even to 0.084 ppmw when the slag agent of (10% -30%) SiO2 is used with the conditions of 1500-1700 X. And 1-3 h holding time. The silicon refined with the method can meet the boron requirement of solar grade silicon. A good reference for the large-scale production of silicon by the metal lurgical method to remove boron is provided in this papar.
metallurgical grade silicon boron refining silica
WANG Ye MA Wenhui WU Jijun ZHOU Yang YANG Bin DAI Yongnian Kazuki Morita
The National Engineering Laboratory for Vacuum Metallurgy,Faculty of Materials and Metallurgical Eng The National Engineering Laboratory for Vacuum Metallurgy,Faculty of Materials and Metallurgical Eng University of Tokyo,Japan International Research Centre for Sustainable Materials,Tokyol53-8505
国际会议
The 10th China-Russia System on Advanced Materials and Technologies(第十届中俄新材料新工艺研讨会)
浙江嘉兴
英文
507-510
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）