Paper Title:
Impact of Impurities in Metallurgical Grade Silicon on Removal Efficiency of Vacuum Evaporation
  Abstract

Vacuum evaporation is usually utilized to remove volatile impurities in metallurgical grade silicon to prepare solar grade silicon by metallurgical routes. Especially phosphorus needs to be removed by vacuum evaporation. And the removal efficiency of impurities strongly influenced the quality and performance of products. In this paper, the removal efficiency of impurities is studied by using different raw material. The results indicated that the content of impurities in raw material had deep effect on the removal efficiency of vacuum evaporation. The high quality product can be obtained by vacuum evaporation only once from raw materials with the lower content of impurities whereas it is not for high content of impurities in raw material. This is due to the vapor-liquid equilibrium in the vacuum furnace. The impurities can be removed effectively by vacuum evaporation many times.

  Info
Periodical
Advanced Materials Research (Volumes 287-290)
Chapter
New Energy Materials
Edited by
Jinglong Bu, Pengcheng Wang, Liqun Ai, Xiaoming Sang, Yungang Li
Pages
1521-1525
DOI
10.4028/www.scientific.net/AMR.287-290.1521
Citation
K. X. Wei, W. H. Ma, Y. Zhou, K. Q. Xie, B. Yang, D. C. Liu, Y. N. Dai, "Impact of Impurities in Metallurgical Grade Silicon on Removal Efficiency of Vacuum Evaporation", Advanced Materials Research, Vols. 287-290, pp. 1521-1525, 2011
Online since
July 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Sang Wook Kim, Do Hyun Kim, Byung Don You, Jeong Whan Han, Mok Soon Kim
238
Authors: Wei Dong, Xu Peng, Da Chuan Jiang, Yi Tan, Qiang Wang, Guo Bin Li
Abstract:In order to investigate Ca evaporation behavior in the electron beam melting process, metallurgical-grade silicon was melted in an electron...
41
Authors: Yi Luo, Jin He Liu, Chang Hua Du, Hui Bin Xu, Chun Tian Li
Abstract:The process of vacuum electron beam welding is characterized by deep-penetration with the action of keyhole effect. The assumption of simple...
355
Authors: Shun Zhong Yao, Yong Nian Dai, Hao Huang
Chapter 9: Structural Materials
Abstract:Abstract:Dealing with thallium-bearing materials by vacuum distillation under the condition of 400~700°Cand 10-60 Pa.Measured contents of...
1123