Yasuhiro IWADATE, Keiko OHGANE
Semiconductive silicon is widely used in solar cells, thyristors, and other important applications. However, smelting and refining Si from silicon dioxide (SiO2) still require a large amount of energy, particularly for the reduction of SiO2 and removal of impurities. In this work, we designed an approach to prepare very fine Si powder from crystalline and/or amorphous SiO2 through the magnesiothermic reduction of SiO2 in molten salts. Moreover, the mechanism of reduction below 1273 K was elucidated. The composition of molten salts and the reaction temperature were varied, and their effect on the Si yield was investigated. The yield was lower in the molten NaCl-MgCl2 molten salt solvent than in LiCl-MgCl2, likely because of the Mg2Si by-product formation. The higher yield in LiCl-MgCl2 resulted from the better solubility of Mg in this molten salt and the suppression of Mg2Si formation.
@article{6d39759d-ae09-4632-bd6e-a977cbcc54b8,
title={Magnesiothermic Reduction of Silicon Dio},
author={Yasuhiro IWADATE and Keiko OHGANE},
year={2026},
language={en}
}TY - JOUR TI - Magnesiothermic Reduction of Silicon Dio AU - Yasuhiro IWADATE AU - Keiko OHGANE PY - 2026 LA - en ER -
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