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Date of Publication:2014-01-01

Journal:功能材料

Affiliation of Author(s):材料科学与工程学院

Issue:19

Page Number:19138-19142

ISSN No.:1001-9731

Abstract:Al-Si-Sn ternary alloy refining method can significantly improve the purification yield of solar grade polysilicon,but the main problem of separating added metallic Sn and Si limits its practical application.The gal-vanostatic deposition experiment of Al-Si-Sn alloy at room temperature in SnCl2 (60 g/L)electrolyte solution was studied in this research.Al-Si-Sn alloy for the anode electrode and high purity Sn (99.99%)for the cathode electrode were used.The effects of current density,electrolyte pH value,deposition time and other parameters on the current efficiency and the morphology of deposited tin were discussed to optimize the experimental process of electrolytic recovery of metal Sn.The results show that at room temperature,current efficiency rea-ches maximum when magnetic stirring speed was 800 r/min,current density was 0.4-0.5 A/cm2 ,deposition time was 3-6 min,and pH value was 3-4.

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