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论文类型：期刊论文

发表时间：2016-12-15

发表刊物：MATERIALS LETTERS

收录刊物：SCIE、EI、Scopus

卷号：185

页面范围：59-62

ISSN号：0167-577X

关键字：Solidification; Segregation; Purification; Rotating magnetic field; Semi-continuous casting

摘要：This paper reported a very simple and energy-saving method to refine metallurgical grade Si (MG-Si) for use in solar cell materials. Refined Si was prepared by using a rotating magnetic field (RMF) to separate the primary Si continuously from hypereutectic Al-30Si melt during semi-continuous casting. Purification testing of the refined Si indicates that the contents of almost all metallic elements can be reduced to the solar grade levels (<= 0.1 ppmw) by electromagnetic separation with solidification refining just twice, while those of the non-metallic impurities B and P can be effectively controlled within the acceptable levels (B < 0.3 ppmw, P < 0.5 ppmw) by solidification refining for three times. (C) 2016 Elsevier B.V. All rights reserved.