Si purification by solidification of Al-Si melt with super gravity
Si purification by solidification of Al-Si melt with super gravity
复制标题
超重力铝硅熔体凝固提纯硅
DOI：
10.1016/s1003-6326(11)61270-3
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发表时间：
2012-04-01
影响因子：
4.5
通讯作者：
Sun Shi-tong
中科院分区：
文献类型：
--
作者：
Li Jing-wei;Guo Zhan-cheng;Sun Shi-tong
研究了超重力凝固过共晶铝硅熔体作为强化分离方式提纯冶金级硅的方法。结果表明：在Al-Si合金的底部，细化的硅晶粒沿超重力方向成功富集；然后用王水浸出法收集精制硅。经分析，所得硅的纯度为99.92%，较冶金级硅的纯度99.59%有明显提高，证明了该提纯方法的可行性。此外，B的质量分数从8.33x10（-6）降至5.25x10(-6)， P的质量分数从33.65x10（-6）降至13.50x10（-6）。
The investigation on purification of metallurgical grade silicon by solidification of hypereutectic Al-Si melt with super gravity as an intensified separation way was carried out. The results indicate that the refined silicon grains are successfully enriched at the bottom of the Al-Si alloy along the direction of super gravity. Then the refined silicon was collected by aqua regia leaching. The purity of the collected silicon is analyzed as 99.92%, which is obviously improved compared with the purity of the metallurgical grade silicon of 99.59%, proving the feasibility of this purification method. Furthermore, the mass fraction of B is reduced from 8.33x10(-6) to 5.25x10(-6) and that of P from 33.65x10(-6) to 13.50x10(-6).