磷是多晶硅中的一种主要杂质元素,目前国内外采用冶金法除磷的工艺主要包括酸洗除磷、合金定向凝固除磷和真空除磷工艺.其中,酸洗除磷工艺可以很有效地去除磷杂质,但仍未达到太阳能级多晶硅小于0.1×10-4%(质量分数)的要求.采用合金定向凝固工艺可以去除80%以上的磷杂质,但目前对凝固后硅中残留溶剂金属的去除方法还有待进一步的研究.通过真空感应熔炼实验已将磷含量从15×10-4%(质量分数)降低至0.8×10-5%(质量分数),并对除磷的热力学条件进行了初步探索.
参考文献
[1] | Peter Woditscha;Wolfgang Kochb .Solar grade silicon feedstock supply for PV Industry[J].Solar Energy Materials and Solar Cells,2002,72:11. |
[2] | Juneja J M;Mukherjee T K .A study of the purification of metallurgical grade silicon[J].HYDROMETALLURGY,1986,16:69. |
[3] | Santos I C;Goncalves A P;Santos C S et al.Purification of metallurgical grade silicon by acid leaching[J].Hydrometallurgy,1990,23:237. |
[4] | Waiter Voos .Production of pure silicon[P].US,2972521,1961-02-21. |
[5] | Hunt L P;Dosaj V D;McCormick J R.Production of solar grade silicon from purified metallurgical silicon[A].Louisiana,1976:125. |
[6] | Chu T L;Chu S S .Partial purification of metallurgical silicon by acid extraction[J].Journal of the Electrochemical Society,1983,130:455. |
[7] | TOMOHITO SHIMPO;TAKESHI YOSHIKAWA;KAZUKI MORITA .Thermodynamic Study of the Effect of Calcium on Removal of Phosphorus from Silicon by Acid Leaching Treatment[J].Metallurgical and Materials Transactions, B. Process metallurgy and materials processing science,2004(2):277-284. |
[8] | Driol;e E Bonnier .Herstellung yon Silizium mit hohem reinheitsgrad[J].Metallwiss Techn,1971,25:2. |
[9] | Obinata I;Komatsu N .A study on purification of metallurgical grade silicon by Si-Al alloy[J].Sci Rep RITU,1957,A-9:118. |
[10] | Takeshi Yoshikawa;Kazuki Morita .Removal of phosphorus by the solidification refining with Si-Al melts[J].Science and technology of advanced materials,2003(6):531-537. |
[11] | Kichiya Suzuki;Kouichi Sakaguchi;Toshio Nakagiri et al.Gaseous removal of phosphorus and boron from molten silicon[J].Journal of the Japan Institute of Metals,1990,54(02):161. |
[12] | Noriyoshi Ynge;Kazuhiro Hanazawa;Kohji Nishikawa et al.Removal of phosphorus,aluminum and calcium by evaporationin molten silicon[J].Nippon Kinzoku Gakkaishi/J Japan Institute of Metals,1997,61(10):1086. |
[13] | Masao Miyake;Tomoaki Hiramatsu;Masafumi Maeda .Removal of phosphorus and antimony in silicon by electron beam melting at low vacuum[J].Journal of the Japan Institute of Metals,2006,70(01):43. |
[14] | Takahiro Miki;Kazuki Morita;Nobuo Sano .Thermodynamics of phosphorus in molten silicon[J].Metallurgical and Materials Transactions B:Process Metallurgy and Materials Processing Science,1996,27B:937. |
[15] | 梁英教;车荫昌.无机物热力学数据手册[M].沈阳:东北大学出版社,1993:515. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%