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Date of Publication:2015-01-01

Journal:无机材料学报

Affiliation of Author(s):材料科学与工程学院

Volume:30

Issue:8

Page Number:785-792

ISSN No.:1000-324X

Abstract:Electron beam melting is an effective method to remove volatile impurities in silicon due to its characteris-tics of high energy density and high vacuum degree, which has huge advantages and wide application prospects in preparation of solar-grade silicon. Currently it has been successfully applied in industry and become one of the key procedures for preparation of solar-grade silicon by metallurgical route. Based on the thermodynamic principle of the volatile impurities removal, the removal efficiency and mechanism are summarized in this paper. According to current problems of this technology combined with our own experience, the emphasis of current research is reviewed from the points of numerical simulation, energy-saving melting technology and coupling with directional solidification tech-nology. The future development direction of this technology is also proposed.

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