Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-04-01

Journal: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS

Included Journals: EI、SCIE

Volume: 25

Issue: 4

Page Number: 1751-1756

ISSN: 0957-4522

Abstract: Si-Al-Zn alloy melts were used for silicon purification by the solvent refining process. The effect of metal Zn addition on alloy macrostructure, primary Si morphology, as well as B distribution in Si-Al alloy during solvent refining process was studied in this work. The three main results were as follows. First, with the increasing of Zn content in Si-Al alloy, the primary silicon changed from slender plate-like to irregular and short, meanwhile the distribution of primary silicon changed from bottom to central and top. Second, the more Zn content in Si-Al alloy, the more inclusions of eutectic melts will be in primary silicon, which results in diffusion difficulty of impurity B in inclusions. Third and last, with increasing Zn content, the refining ratio of B increased gradually and removal fraction of B decreased accordingly.