Design of Refining Slag Based on Structural Modifications Associated with the Boron Removal for SoG-Si
文献类型：期刊论文
| 作者 | Qian, Guoyu1; Sun, Yiwei1; Wang, Dong1; Wu, Zhiliang2; Wang, Zhi1; Ma, Wenhui2 |
| 刊名 | MATERIALS
 |
| 出版日期 | 2022-05-01 |
| 卷号 | 15期号:9页码:17 |
| 关键词 | solar grade Si slagging treatment B removal raman spectroscopy NMR spectroscopy |
| DOI | 10.3390/ma15093107 |
| 英文摘要 | Solar grade silicon (SoG-Si) is the core material of solar cells. The removal of boron (B) has always been a challenge in the preparation of high purity Si. Slag refining has always been considered as one of the effective methods to remove B, but the design of refined slag has been limited by the cognition of the relationship between slag structure and impurity removal, and can only rely on the apparent basicity and oxygen potential adjustment of slag based on a large number of conditional experiments. In order to clarify the B removal mechanism of slag refining from Si, nuclear magnetic resonance (NMR) and Raman vibrational spectroscopy were used to investigate in detail the behavior and state of B and aluminum (Al) in the SiO2-CaO-Al2O3-B2O3 slag. The role of the degree of B-Si cross linking on the B activity in slag was highlighted by comparing the partition ratio (L-B) between slag and Si. Q(2) structural unit of slag is an important site for capturing B. BO4 (1B, 3Si) species is the main form of connection between B and silicate networks, which determines the activity of B in the slag. The addition of Al2O3 into SiO2-CaO slag can change the relative fraction of Q(2) and BO4 (1B, 3Si). Increasing Al2O3 content from 0 to about 20 wt% can lead to the overall increase of Q(2) population, and a tendency to decrease first and then increase of BO4 (1B, 3Si) fraction under both basicity conditions (0.6 and 1.1). When Al2O3 content is less than 10 +/- 1 wt%, the decrease of BO4 (1B, 3Si) population plays a major role in deteriorating the connectivity between B and aluminosilicate network, which leads to a higher activity of B. When the Al2O3 content is greater than 10 +/- 1 wt%, B is incorporated into the silicate network more easily due to the formation of more Q(2) and BO4 (1B, 3Si), which contributes to a rapid decline in activity of B in slag. |
| WOS关键词 | SODIUM BOROSILICATE GLASSES ; ALUMINOSILICATE GLASSES ; SILICON ; RAMAN ; AL ; PURIFICATION ; PHOSPHORUS ; VISCOSITY ; SOLVENT ; OXYGEN |
| 资助项目 | National Natural Science Foundation of China[51934006] ; National Natural Science Foundation of China[U1902219] |
| WOS研究方向 | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering ; Physics |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:000795291200001 |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/53278]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Qian, Guoyu; Wang, Zhi |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Yunnan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qian, Guoyu,Sun, Yiwei,Wang, Dong,et al. Design of Refining Slag Based on Structural Modifications Associated with the Boron Removal for SoG-Si[J]. MATERIALS,2022,15(9):17. |
| APA | Qian, Guoyu,Sun, Yiwei,Wang, Dong,Wu, Zhiliang,Wang, Zhi,&Ma, Wenhui.(2022).Design of Refining Slag Based on Structural Modifications Associated with the Boron Removal for SoG-Si.MATERIALS,15(9),17. |
| MLA | Qian, Guoyu,et al."Design of Refining Slag Based on Structural Modifications Associated with the Boron Removal for SoG-Si".MATERIALS 15.9(2022):17. |
入库方式： OAI收割
来源：过程工程研究所
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