Boron and Phosphorus Removal in Si Purification with Ca-Si Alloy under  Air Atmosphere

H. R. Cheng; S. S. Zheng; C. Chen

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Paper

Boron and Phosphorus Removal in Si Purification with Ca-Si Alloy under Air Atmosphere

In Proceedings of the International Workshop on Materials, Chemistry and Engineering IWMCE - Volume 1, 127-132, 2018 , Xiamen, China

Authors: H. R. Cheng ¹ ; S. S. Zheng ¹ and C. Chen ²

Affiliations: ¹ College of Energy and Xiamen University, China ; ² College of Energy, Xiamen University, College of Physical Science and Technology and Xiamen University, China

Keyword(s): silicon; Ca-Si alloy; B removal; P removal; alloy refining

Abstract: To further discuss the reduction of phosphorus (P) in the purification of metallurgical grade silicon (MG-Si), MG-Si alloyed with Ca-Si alloy first and then acid leaching was employed to removal CaSi2 phase in which P was enriched under air atmosphere at 1723 K in this paper. The higher removal fraction of P can be obtained by adding more Ca-Si alloy to Si. The P removal fraction is 95.45% when the mass ratio of Si to Ca-Si alloy is 0.5. However, B cannot be removed from Si by alloying with Ca-Si alloy due to the concentration of B in the Si phase is higher than that in CaSi2 phase.

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Paper citation in several formats:

Cheng, H.; Zheng, S. and Chen, C. (2018). Boron and Phosphorus Removal in Si Purification with Ca-Si Alloy under Air Atmosphere. In Proceedings of the International Workshop on Materials, Chemistry and Engineering - IWMCE; ISBN 978-989-758-346-9, SciTePress, pages 127-132. DOI: 10.5220/0007435501270132

@conference{iwmce18,
author={H. R. Cheng. and S. S. Zheng. and C. Chen.},
title={Boron and Phosphorus Removal in Si Purification with Ca-Si Alloy under Air Atmosphere},
booktitle={Proceedings of the International Workshop on Materials, Chemistry and Engineering - IWMCE},
year={2018},
pages={127-132},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0007435501270132},
isbn={978-989-758-346-9},
}

TY - CONF

JO - Proceedings of the International Workshop on Materials, Chemistry and Engineering - IWMCE
TI - Boron and Phosphorus Removal in Si Purification with Ca-Si Alloy under Air Atmosphere
SN - 978-989-758-346-9
AU - Cheng, H.
AU - Zheng, S.
AU - Chen, C.
PY - 2018
SP - 127
EP - 132
DO - 10.5220/0007435501270132
PB - SciTePress