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公开(公告)号:EP2058279A1
公开(公告)日:2009-05-13
申请号:EP07806497.9
申请日:2007-08-31
IPC分类号: C01B33/037 , B22D21/00 , B22D27/04
CPC分类号: C01B33/037 , C30B11/00 , C30B29/06
摘要: This metallic silicon is manufactured by refining molten crude metallic silicon by unidirectional solidification, and has a purity of 3N or more to 6N or less and an average crystal grain diameter of 1 mm or more. This method for manufacturing the metallic silicon includes: solidifying molten crude metallic silicon in a mold which contains fine silica particles in an inner peripheral layer thereof by unidirectional solidification at a rate of 1 mm/min or less; and then cooling to 200°C or below at a rate of 2°C/min or less.
摘要翻译: 该金属硅是通过单向凝固精炼熔融的粗制金属硅来制造的,其纯度为3N以上且6N以下,平均结晶粒径为1mm以上。 该金属硅的制造方法包括:通过以1mm / min以下的速度进行单向凝固,在其内周层中固化含有二氧化硅微粒的模具中的熔融粗制金属硅; 然后以2℃/ min以下的速度冷却至200℃以下。