Purification of Silicon by Solvent Refining with Si-Sn Alloy

Cheng Hao Lu; Ming Fang; Hui Xian Lai; Liu Qing Huang; Juan Chen; Jin Tang Li; Z.L. Sheng; J.N. Shen; X.T. Luo

doi:10.4028/www.scientific.net/AMR.690-693.962

Paper Titles

Analysis of the Effect of Natural Slope Stability due to Tunnel Excavation in Mountainous Areas
p.938

Effect of Argon Gas Flow on the Thermal Field in a Directional Solidification System for Multi-Crystalline Silicon
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Effect of Sodium-Based Slag Treatment on the Distribution of Impurities in Metallurgical Grade Silicon
p.949

Maximized On-Demand Hydrogen Generator Design
p.954

Purification of Silicon by Solvent Refining with Si-Sn Alloy
p.962

Studies on the Electrochemical Behavior of Sio/C Anode Materials by AC Impedance Method
p.967

Summarize the Studies on Improving the Electrochemical Performance of Spinel LiMn₂O₄
p.971

Temperature Distribution of Multi-Crystalline Silicon Ingots in the Directional Solidification Process
p.977

Cathode Material Li [Li_0.2 Mn_0.44Ni_0.18Co_0.18]O₂ Synthesized by Molten Salt Method
p.981

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Purification of Silicon by Solvent Refining with Si-Sn Alloy

Abstract:

Silicon was purified by solvent refining with Si-Sn binary alloy system. Two descend mold velocities, 10mm/h and 100mm/h were tested in directional solidification of the alloy melt. The morphology, structure and the ingredient of the ingots have been investigated by SEM, XRD, EPMA, GDMS and ICP-MS. The contents of Fe, N, C , Ca, Mn, Cu, P and B are significantly lower than that in raw silicon. Furthermore, the acid leaching experiments were introduced to remove tin from silicon. The temperature of acid leaching and the type of acids were the predominant conditions in tin separation from silicon by acid leaching.