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Enhancing P removal from primary Si by P-containing Al2Si2Sr phase during Al-Si solvent refining

文献类型：期刊论文

作者Chen, Chen1,2; Li, Jingwei3; Song, Wangfeng1,2; Jiang, Xuesong1,2; Ding, Juxuan1,2; Zhu, Xiaoxiao1,2; Chen, Jian1,4; Ban, Boyuan1,4
刊名MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
出版日期2022-08-15
卷号147
ISSN号1369-8001
关键词Al-Si alloy Solvent refining Al2Si2Sr phase First-principle calculation
DOI10.1016/j.mssp.2022.106769
通讯作者Ban, Boyuan(banboyuan@rntek.cas.cn)
英文摘要In this paper, adding small amounts of Sr in Al-Si solvent to enhance the P removal from primary Si by the formation of P-containing Al2Si2Sr phase has been developed. By microstructure and EDS analysis, it is deter-mined that the Al2Si2Sr phase precipitated in the melt is enriched with 0.8-1.2 at% P. The precipitation of the P-containing Al2Si2Sr phase consumes a large amount of P in the melt, which makes the P content in the primary Si decrease. With the addition of Sr-16000 ppmw, the P removal fraction in the primary Si is all over 93% and the highest removal fraction reaches 94.66%. The B content in primary Si does not change significantly with the increase of Sr addition. Some of the Al2Si2Sr phases are trapped and engulfed by the primary Si, which leads to the accumulation of Sr impurity in the primary Si. Moreover, the possibility of P behaving as the solute atom in the Al2Si2Sr solid solution is analyzed through first-principle calculations. The result shows that P replaces Si at its the atomic position in the Al2Si2Sr phase to achieve a more stable crystal structure. Finally, an evolution model of the interaction between the P-containing Al2Si2Sr phase and the primary Si in the Al-Si melt is established.
WOS关键词METALLURGICAL-GRADE SILICON ; BORON REMOVAL ; DIRECTIONAL SOLIDIFICATION ; B REMOVAL ; PURIFICATION ; PHOSPHORUS ; MECHANISM ; ALLOYS ; SYSTEM ; NUCLEATION
资助项目National Natural Science Foundation of China[51804294] ; National Natural Science Foundation of China[51874272] ; National Natural Science Foundation of China[52111540265] ; Anhui Provincial Natural Science Foundation[1808085ME121] ; Key Laboratory of Photovoltaic and Energy Conservation Materials, Chinese Academy of Science[PECL2021QN003] ; Hefei Institutes of Physical Science, Chinese Academy of Sciences Director's Fund[YZJJZX202018] ; International Clean Energy Talent Program by China Scholarship Council
WOS研究方向Engineering ; Materials Science ; Physics
语种英语
出版者ELSEVIER SCI LTD
WOS记录号WOS:000798567600001
资助机构National Natural Science Foundation of China ; Anhui Provincial Natural Science Foundation ; Key Laboratory of Photovoltaic and Energy Conservation Materials, Chinese Academy of Science ; Hefei Institutes of Physical Science, Chinese Academy of Sciences Director's Fund ; International Clean Energy Talent Program by China Scholarship Council
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/130947]  
专题中国科学院合肥物质科学研究院
通讯作者Ban, Boyuan
作者单位1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Photovolta & Energy Conservat Mat, HFIPS, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Hefei 230026, Peoples R China
3.Hefei Univ Technol, Sch Mat Sci & Engn, Hefei 230009, Peoples R China
4.Inst Energy, Hefei Comprehens Natl Sci Ctr, Hefei 230031, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Chen,Li, Jingwei,Song, Wangfeng,et al. Enhancing P removal from primary Si by P-containing Al2Si2Sr phase during Al-Si solvent refining[J]. MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING,2022,147.
APA Chen, Chen.,Li, Jingwei.,Song, Wangfeng.,Jiang, Xuesong.,Ding, Juxuan.,...&Ban, Boyuan.(2022).Enhancing P removal from primary Si by P-containing Al2Si2Sr phase during Al-Si solvent refining.MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING,147.
MLA Chen, Chen,et al."Enhancing P removal from primary Si by P-containing Al2Si2Sr phase during Al-Si solvent refining".MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING 147(2022).

入库方式： OAI收割

来源：合肥物质科学研究院

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