Evaporated metal aluminium and calcium removal from directionally solidified silicon for solar cell by electron beam candle melting

被引：26
作者：
Jiang, Dachuan [1 ]
Tan, Yi [1 ]
Shi, Shuang [1 ]
Dong, Wei [1 ]
Gu, Zheng [1 ]
Guo, Xiaoliang [1 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, Key Lab Solar Energy Photovolta Syst Liaoning Pro, Dalian 116023, Liaoning Provin, Peoples R China
来源：
VACUUM | 2012年 / 86卷 / 10期
关键词：
Electron beam melting; Molten silicon; Aluminium; Calcium; Impurities removal; METALLURGICAL GRADE SILICON; PURIFICATION;
D O I：
10.1016/j.vacuum.2012.01.004
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
During the refinement of metallurgical-grade silicon (MG-Si). Al and Ca cannot be reduced to a target level by conducting directional solidification only once. Electron beam candle melting (EBCM) is a new method that can be used to further reduce Al and Ca by directly melting Si ingots after directional solidification. A certain stable molten pool with a maximum surface area and a minimum depth exists and is proven to effectively remove Al and Ca. The energy utilization ratio during EBCM is also compared with that of electron beam melting (EBM). (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1417 / 1422
页数：6
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