采用复合定向凝固法制备多晶硅铸锭,在精炼和定向凝固过程中施加电磁场控制柱状晶生长过程.实验制得平行于铸锭中心轴的柱状晶,直径约为1mm,铸锭表面质量良好.分析表明金属杂质并未在晶界处发生聚集;且沿铸锭轴向分布也有明显改善,增加了铸锭的有效提纯长度.并通过理论计算探讨了晶体生长速度和定向凝固次数对杂质去除效果的影响.
In this experiment, complex directional solidification (CDS) method was used for preparing multi-crys-talline silicon ingot. Meanwhile electromagnetic field was used during refining and solidification process. Exper-imental results show that an integral silicon ingot with high-quality is successfully fabricated. Analyses reveal that the direction of the most grains is parallel to the axial of silicon ingot, the impurities are separated to the two ends of silicon ingot effectively. The effect of crystal growth and directional solidification times on the puri-fication of metallurgical grade silicon are studied by theoretical calculations.
参考文献
| [1] | 杨玉安.多晶硅产业化技术研究发展建议[A].,2005:45-55. |
| [2] | 于站良,马文会,戴永年,杨斌,魏奎先.太阳能级硅制备新工艺研究进展[J].轻金属,2006(03):43-47. |
| [3] | Mozer AP. .New developments in silicon Czochralski crystal growth and wafer technology[J].Materials Science & Engineering, B. Solid-State Materials for Advanced Technology,2000(1/3):36-41. |
| [4] | Arafune K;Ohishi E;Sai H;Ohshita Y;Yamaguchi M .Directional solidification of polycrystalline silicon ingots by successive relaxation of supercooling method[J].Journal of Crystal Growth,2007(1):5-9. |
| [5] | 刘秋娣,林安中,林喜斌.多晶硅锭的制备及其形貌组织的研究[J].稀有金属,2002(06):416-419. |
| [6] | 李桂荣,曹健峰,王宏明,夏小江,戴起勋,赵玉涛.电磁技术在金属材料科学与工程中的应用[J].材料导报,2006(08):58-61. |
| [7] | Yuge N;Abe M;Hanazawa K et al.[J].Progress in Photovoltaics:Research and Applications,9(03):203-209. |
| [8] | Khattak CP.;Joyce DB.;Schmid F. .A simple process to remove boron from metallurgical grade silicon[J].Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion,2002(1/4):77-89. |
| [9] | Xi Li;Yves Fautrelle;Zhongming Ren .Influence of thermoelectric effects on the solid–liquid interface shape and cellular morphology in the mushy zone during the directional solidification of Al–Cu alloys under a magnetic field[J].Acta materialia,2007(11):3803-3813. |
| [10] | Stelian C;Delannoy Y;Fautrelle Y et al.[J].Journal of Crystal Growth,2004,266(1-3):207-215. |
| [11] | 崔忠圻.金属学与热处理[M].北京:机械工业出版社,1994 |
| [12] | 韩至成.电磁冶金学[M].北京:冶金工业出版社,2001 |
| [13] | Macdonald D;Cuevas A;Kinomura A et al.[J].Journal of Applied Physics,2005,97:033523. |
| [14] | Zhang J;Ma X;Li T J.Research on Vacuum Induction Melting of Metallurgical Grade Silicon[A].,2007:214-216. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%