کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7044183 | 1456929 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced separation of phosphorus from metallurgical grade silicon by CaAl2Si2 phase reconstruction
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Enhanced separation of phosphorus from metallurgical grade silicon by CaAl2Si2 phase reconstruction Enhanced separation of phosphorus from metallurgical grade silicon by CaAl2Si2 phase reconstruction](/preview/png/7044183.png)
چکیده انگلیسی
To find a high-efficiency approach for removing phosphorus from metallurgical grade silicon, a novel method of silicon-aluminum-calcium alloy refining was investigated through phase reconstruction to form CaAl2Si2 phase. The distribution of phosphorus between purified solid silicon and liquid silicon-aluminum-calcium alloy was determined to investigate the possibility of removing phosphorus from the silicon by alloy refining with silicon-aluminum-calcium melt. It was found that the CaAl2Si2 phase had a high affinity for phosphorus resulting in dissolving a large quantity of phosphorus. Decreasing the amount of getter materials was not good for the phosphorus removal from the silicon, while adopting twice alloy refining could strengthen the removal with obtaining as high as 99.99Â wt% purity silicon. In addition, the purity of refined silicon depends on the quenching temperature and the cooling rate. Moreover, to evaluate efficiency of phosphorus removal from silicon by silicon-aluminum-calcium alloy refining, the thermodynamic properties of phosphorus in solid silicon and liquid alloy phase at 1273-1473Â K were further evaluated by the chemical equilibrium method.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 191, 31 January 2018, Pages 257-265
Journal: Separation and Purification Technology - Volume 191, 31 January 2018, Pages 257-265
نویسندگان
Huixian Lai, Zhilin Sheng, Jintang Li, Pengfei Xing, Xuetao Luo,