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| Hauptseite > Publikationsdatenbank > P removal from Si by Si-Ca-Al alloying-leaching refining: Effect of Al and the CaAl2Si2 phase > print |
| Hauptseite > Publikationsdatenbank > P removal from Si by Si-Ca-Al alloying-leaching refining: Effect of Al and the CaAl2Si2 phase > print |
| 001 | 904030 | ||
| 005 | 20240711092243.0 | ||
| 024 | 7 | _ | |a 10.1016/j.seppur.2021.118675 |2 doi |
| 024 | 7 | _ | |a 1383-5866 |2 ISSN |
| 024 | 7 | _ | |a 1873-3794 |2 ISSN |
| 024 | 7 | _ | |a 10.34734/FZJ-2021-05600 |2 datacite_doi |
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| 037 | _ | _ | |a FZJ-2021-05600 |
| 082 | _ | _ | |a 540 |
| 100 | 1 | _ | |a Zhu, Mengyi |0 P:(DE-HGF)0 |b 0 |
| 245 | _ | _ | |a P removal from Si by Si-Ca-Al alloying-leaching refining: Effect of Al and the CaAl2Si2 phase |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2021 |b Elsevier Science |
| 336 | 7 | _ | |a article |2 DRIVER |
| 336 | 7 | _ | |a Output Types/Journal article |2 DataCite |
| 336 | 7 | _ | |a Journal Article |b journal |m journal |0 PUB:(DE-HGF)16 |s 1714048731_7812 |2 PUB:(DE-HGF) |
| 336 | 7 | _ | |a ARTICLE |2 BibTeX |
| 336 | 7 | _ | |a JOURNAL_ARTICLE |2 ORCID |
| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a Phosphorus (P) is a critical impurity in metallurgical-grade Si that needed to be removed for solar-grade Si production. The Si-Ca-Al-P system is one of the most crucial alloy systems for Si refining, where P can be separated by either the Si-Al solvent refining or the Si-Ca alloying-leaching process. In this work, a series of Si-Ca-Al alloys were obtained to investigate the role of alloy composition and the CaAl2Si2 phase in P segregation and separation. The used alumina crucible led to heavy Al contamination and resulted in unexpected Si-Ca-Al alloy compositions. CaAl2Si2 and CaSi2 were found as the main precipitates, and relatively higher P content was detected in the CaAl2Si2 phase. Leaching experiments indicate that P removal degree increases with increasing Ca/Al ratio and increasing total alloying amount (Ca + Al). Effects of alloy composition were further analyzed by statistical methods, which indicates Ca firmly plays a strong, positive, and monotonic role in P removal while no strong attraction between Al and P. Theoretical P removal model for the Si-Ca-Al system was established and in good agreement with measured results. Interaction coefficients of Ca and Al to P were fitted as and , which further confirms Ca is the essential driving force for P segregation. Finally, the possibility of P solid solution formation was verified by first-principle simulations that both CaAl2Si2 and CaSi2 are able to dissolve P, especially through the Si site, but the CaAl2Si2 phase is more favourable for P dissolution than CaSi2, which explains the reason of the often detected high P content in CaAl2Si2. |
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| 700 | 1 | _ | |a Yue, Shengying |0 P:(DE-HGF)0 |b 1 |
| 700 | 1 | _ | |a Wu, Guixuan |0 P:(DE-Juel1)145147 |b 2 |u fzj |
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| 700 | 1 | _ | |a Xu, Yijiang |0 P:(DE-HGF)0 |b 4 |
| 700 | 1 | _ | |a Safarian, Jafar |0 P:(DE-HGF)0 |b 5 |
| 773 | _ | _ | |a 10.1016/j.seppur.2021.118675 |g Vol. 271, p. 118675 - |0 PERI:(DE-600)2022535-0 |p 118675 - |t Separation and purification technology |v 271 |y 2021 |x 1383-5866 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/904030/files/1-s2.0-S1383586621003877-main.pdf |y OpenAccess |
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