Yun Lei, Wenhui Ma
In order to discuss the effects of transition metals such as Zr, Hf, and Ti on the removal of impurities (B, P, Fe, Al, Ca, Ti, V, Cu, Ni, Mn, Zr, and Hf) in the purification of metallurgical-grade Si (MG-Si) with Al–Si alloy, the impurity phases formed after solidification were investigated by electron probe microanalysis (EPMA) and their removal by acid leaching was performed. EPMA investigation showed that β-Al5FeSi was the main impurity phase aside from Al in the sample without additives. Additionally, the presence of Zr, Ti, and Hf in the alloy significantly enhanced the extraction efficiency of these impurities, achieving high removal rates of up to 99.998%, 99.9994%, and 99.997% for Zr, Ti, and Hf, respectively. These findings highlight the effectiveness of utilizing transition metals to improve the purification process of silicon, providing valuable insights for the metallurgical industry aiming to refine silicon to high purity levels.
@article{6ed7d2fe-6e92-48f3-a74b-b7c4ec5932ce,
title={Impurity phases and their removal in Si purification with Al–Si alloy using transition metals as additives},
author={Yun Lei and Wenhui Ma},
year={2017},
language={en}
}TY - JOUR TI - Impurity phases and their removal in Si purification with Al–Si alloy using transition metals as additives AU - Yun Lei AU - Wenhui Ma PY - 2017 LA - en ER -
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