M. D. Johnston, M. Barati
The possibility of refining metallurgical grade silicon to a high-purity product for solar cell applications by the slagging of impurity elements was investigated. Distribution coefficients were determined for B, Ca, Mg, Fe, K and P between magnesia or alumina saturated Al2O3-CaO-MgO-SiO2 and Al2O3-BaO-SiO2 slags and silicon at 1500 °C. The partitioning of the impurity elements between the molten silicon and slag was examined in terms of the basicity and oxygen potential of the slag, with particular focus on the behaviour of boron and phosphorus. The experimental results showed that both of these aspects of slag chemistry have a significant influence on the distribution coefficient of B and P. Increasing the oxygen potential by additions of silica was found to increase the distribution coefficients.
@article{2fd163d9-3259-414c-a314-632b2a93c18b,
title={Distribution of impurity elements in slag–silicon equilibria for oxidative refining of metallurgical silicon for solar cell applications},
author={M. D. Johnston and M. Barati},
year={2010},
language={en}
}TY - JOUR TI - Distribution of impurity elements in slag–silicon equilibria for oxidative refining of metallurgical silicon for solar cell applications AU - M. D. Johnston AU - M. Barati PY - 2010 LA - en ER -
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