Influence of interactions between alumina crucible and Si-Ca-Fe melt on B and P removal from silicon

doi:10.1016/j.seppur.2020.117743

	Influence of interactions between alumina crucible and Si-Ca-Fe melt on B and P removal from silicon
	Sakiani, Hassan 1; Tabaian, Seyed Hadi 1; Chen, Jian 2
刊名	SEPARATION AND PURIFICATION TECHNOLOGY
	2021-01-15
卷号	255
关键词	Silicon purification Solvent refining Alumina Acid leaching Calcium Melt-crucible interaction
ISSN号	1383-5866
DOI	10.1016/j.seppur.2020.117743
通讯作者	Tabaian, Seyed Hadi(tabaian@aut.ac.ir)
英文摘要	The effect of alumina crucible on different aspects of the solvent refining of silicon by the Si-Ca-Fe system was investigated in this paper. Ca and Fe were added to Si in a wide range of concentrations (0-20 wt%), and the melt composition change resulting from melt-alumina interactions was studied thermodynamically and experimentally. The ratio of Ca concentration in the final melt to its value in the initial mixture was in the range of 0.17-0.23. On the other hand, a considerable amount of Al was identified in the melt together with CaAl4O7, Ca2Al2SiO7, and CaAl2O4 phases as oxide interaction products. A conceptual mechanism was proposed for the evolution of these products. Then, the segregation behavior of impurities during solidification was studied based on Fe or Ca increment in the system, and B and P removal rates were calculated in particular. The higher the Ca or Fe content were, the higher removal rates were achieved. They were also enhanced by cooling the samples in the furnace rather than quenching from 1493 K (1220 degrees C). The directional solidification method was also examined, and it showed the best overall removal rate with 94.9% for P and 63% for B, while its impact on B reduction was more than P.
资助项目	Iran National Science Foundation (INSF)[96001489] ; Niroo Research Institute (NRI)[96/30813/06] ; National Natural Science Foundation of China[51874272] ; National Natural Science Foundation of China[51804294]
WOS研究方向	Engineering
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000631006200001
资助机构	Iran National Science Foundation (INSF) ; Niroo Research Institute (NRI) ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/120859]
专题	中国科学院合肥物质科学研究院
通讯作者	Tabaian, Seyed Hadi
作者单位	1.Amirkabir Univ Technol, Tehran Polytech, Dept Mat & Met Engn, Tehran 1591634311, Iran 2.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Solid State Phys, Key Lab Photovolta & Energy Conservat Mat, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Sakiani, Hassan,Tabaian, Seyed Hadi,Chen, Jian. Influence of interactions between alumina crucible and Si-Ca-Fe melt on B and P removal from silicon[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2021,255.
APA	Sakiani, Hassan,Tabaian, Seyed Hadi,&Chen, Jian.(2021).Influence of interactions between alumina crucible and Si-Ca-Fe melt on B and P removal from silicon.SEPARATION AND PURIFICATION TECHNOLOGY,255.
MLA	Sakiani, Hassan,et al."Influence of interactions between alumina crucible and Si-Ca-Fe melt on B and P removal from silicon".SEPARATION AND PURIFICATION TECHNOLOGY 255(2021).