Study on impurities removal from silicon by slag refining with Fe(OH)3-SiO2-CaF2 slag system
- 材料学院－会议论文 
An innovating slag system, Fe(OH)3-SiO2-CaF2 system, was introduced in the metallurgical methods to purify silicon for photovoltaic application. The partition ratio of boron(LB) between slag and silicon was studied under different mass ratio of slag to silicon and varying mass ratio of Fe(OH)3 to SiO2 under argon condition at 1873K. The distribution of impurity elements in silicon after slag refining was detected by scanning electron scope and electron probe micro analysis. Experimental results illustrated that the Fe-Si binary system could promote the LB. Silicon was surrounded by amorphous slag. Impurity elements are concentrated in slag. ? (2013) Trans Tech Publications, Switzerland.