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Recycling of silicon scraps by SiC absorption with Al addition in multicrystalline silicon

Recycling of silicon scraps by SiC absorption with Al addition in multicrystalline silicon

Authors :
Yi Tan
Shiqiang Qin
Shutao Wen
Shuang Shi
Dachuan Jiang
Pengting Li
Source :
Materials Science in Semiconductor Processing. 74:218-224
Publication Year :
2018
Publisher :
Elsevier BV, 2018.

Abstract

A new method for SiC elimination from multicrystalline silicon with Al addition by using the chemical reaction between Al and SiC is conducted in this study. Inclusion-free region is obtained when Al addition content increases to 5.4% and 7.9%. SiC particles tend to pile up around Al during the process and precipitate at ingot bottom. Furthermore, Al-Si alloying occurs at the inclusion-free region. The electron probe micro analysis mapping illustrates the existence of carbon in the precipitated Al which indicates the occurrence of chemical reaction between SiC particles and Al during the process. The results can be an effective way to eliminate SiC for silicon scraps recycling.

Details

ISSN :
13698001
Volume :
74
Database :
OpenAIRE
Journal :
Materials Science in Semiconductor Processing
Accession number :
edsair.doi...........ec7af667c5cb3693958582f8a75c752d
Full Text :
https://doi.org/10.1016/j.mssp.2017.10.047