| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing high purity silicon by which boron is is removed from silicon in order to provide the high purity silicon useful for the production of a solar battery or the like, and also by which the efficiency of a reaction for removing boron is enhanced and the durability of a vessel used for the reaction is improved. SOLUTION: In the method for producing the high purity silicon by removing boron contained in silicon by adding one or both of a carbonate of an alkali metal and hydrate of the carbonate and SiO<SB>2</SB>into a vessel stored with molten silicon to form slag, a vessel made of an oxidation-resistant and non-electroconductive material is used as the vessel used for the boron removing reaction, and the molten silicon is directly heated by an induction heating means while cooling the vessel from outside. COPYRIGHT: (C)2007,JPO&INPIT
|
