| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for efficiently removing boron in molten silicon in the production of silicon requiring high purity for e.g. solar cell. SOLUTION: This refining method of silicon is characterized in that Na<SB>2</SB>CO<SB>3</SB>(5) or a mixture 6 of Na<SB>2</SB>CO<SB>3</SB>and SiO<SB>2</SB>is blown into molten silicon together with a carrier gas through a bottom hole 2 or an immersed pipe 3 of a container housing the molten silicon 1. COPYRIGHT: (C)2006,JPO&NCIPI
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