A model for distribution of aluminum in silicon refined by vacuum directional solidification

▶ We propose a distribution model of Al in Si by vacuum directional solidification. ▶ The model includes two parts: segregation of Al and evaporation of Al. ▶ The validity of the model is conformed by comparing with the experiment results. ▶ The Al content in Si ingot decreases with increasing temperature. ▶ Solidification rate mainly affect the segregation of Al.