Copper Removal from Hypereutectic Cu-Si Alloys by Heavy Liquid Media Separation |
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| Authors: | Aleksandar M. Mitra?inovi? Torstein A. Utigard |
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| Affiliation: | (1) Department of Materials Science and Engineering, University of Toronto, 184 College St., Toronto, ON, M5S 3E4, Canada;(2) Centre for Advanced Coating Technologies (CACT), University of Toronto, Toronto, ON, M5S 3E4, Canada;(3) Laboratory for Emerging Energy Research (LEER), University of Waterloo, Waterloo, ON, Canada;(4) Present address: University of Toronto, Bahen Centre for Information Technologies, Rm 8268 40 St. George Street, Toronto, ON, M5S 1A4, Canada |
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| Abstract: | A high-capacity method for silicon refining is investigated. The biggest obstacle in Si refining using the alloying technique
is the amount of solute element. In the current work, Cu is removed from two Cu-Si hypereutectic alloys by the heavy liquid
media separation technique. The results indicated 86.0 pct silicon recovered, which is close to the theoretical limit. The
chemical analysis showed a Cu concentration of 0.68 wt pct in the 50 Cu-Si alloy for a 75-μm average particle size after heavy liquid media separation. The optimal particle size was found in the range of 75 to 125 μm. Heavy liquid media separation is an efficient technique in the process of liberating Si dendrites that can be used as feedstock
in solar cell applications. |
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