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材料工程  2015, Vol. 43 Issue (4): 73-78    DOI: 10.11868/j.issn.1001-4381.2015.04.013
  材料与工艺 本期目录 | 过刊浏览 | 高级检索 |
熔盐电解-区域熔炼法制备太阳能级硅的工艺研究
孙东亚1, 何丽雯2, 廉冀琼1, 谢安1, 曾小兰1, 杨若绵1
1. 厦门理工学院 材料科学与工程学院, 福建 厦门 361024;
2. 华侨大学 材料科学与工程学院, 福建 厦门 361021
Process for Solar Grade Silicon Production by Molten Salt Electrolysis and Zone Melting
SUN Dong-ya1, HE Li-wen2, LIAN Ji-qiong1, XIE An1, ZENG Xiao-lan1, YANG Ruo-mian1
1. College of Materials Science & Engineering, Xiamen University of Technology, Xiamen 361024, Fujian, China;
2. College of Materials Science & Engineering, Huaqiao University, Xiamen 361021, Fujian, China
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摘要 以高纯石英为原料,石墨坩埚和钨为电极材料,在CaCl2-LiCl混合熔盐(摩尔比9:1)中电解制备Ca-Si合金,经区域熔炼提纯制得太阳能级硅(SG-Si)。用XRD,SEM和ICP-MS对电解合金及提纯后产物进行表征和含量分析。结果表明:在电解槽电压2.6V、温度850℃的条件下,产物为Ca-Si合金。经过两次区域熔炼提纯后,硅锭85%以上的区域纯度接近99.9999%,符合SG-Si的要求。
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孙东亚
何丽雯
廉冀琼
谢安
曾小兰
杨若绵
关键词 高纯石英粉熔盐电解太阳能级硅区域熔炼    
Abstract:Ca-Si alloys were prepared in molten CaCl2-LiCl(mole ratio of 9:1) with high purity silicon dioxide as raw material, high purity graphite and tungsten as electrode by an electrolysis method.The solar grade silicon(SG-Si) was got after the alloys purified by zone melting process. The alloy and purified production were characterized by X-ray diffraction(XRD),scanning electron microscope(SEM) and inductively coupled plasma mass spectrometry(ICP-MS). The results show that electrolysis product is alloy of calcium and silicon at 850℃ when the cathodic voltage is about 2.6V. After twice zone melting process,the purity of silicon of 85% silicon ingot as-prepared is nearly 99.9999%, complying with the standard of SG-Si.
Key wordshigh purity silicon dioxide    molten salt electrolysis    solar grade silicon    zone melting
收稿日期: 2014-02-27      出版日期: 2015-04-20
中图分类号:  TF111.522  
基金资助:国家自然科学基金资助项目(50872037;11204258);福建省中青年教师教育科研项目(JB14077)
通讯作者: 孙东亚(1982-),男,工程师,从事能源新材料的制备及表征研究工作,联系地址:福建省厦门市集美区理工路600号厦门理工学院实验楼9-308室(361024),2013123205@xmut.edu.cn     E-mail: 2013123205@xmut.edu.cn
引用本文:   
孙东亚, 何丽雯, 廉冀琼, 谢安, 曾小兰, 杨若绵. 熔盐电解-区域熔炼法制备太阳能级硅的工艺研究[J]. 材料工程, 2015, 43(4): 73-78.
SUN Dong-ya, HE Li-wen, LIAN Ji-qiong, XIE An, ZENG Xiao-lan, YANG Ruo-mian. Process for Solar Grade Silicon Production by Molten Salt Electrolysis and Zone Melting. Journal of Materials Engineering, 2015, 43(4): 73-78.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.04.013      或      http://jme.biam.ac.cn/CN/Y2015/V43/I4/73
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