Slag refining,as an important option for boron removal to produce solar grade silicon（SOG-Si） from metallurgical grade silicon（MG-Si）,has attracted increasing attention.In this paper,Na_2CO_3-SiO_2 systems were ch...Slag refining,as an important option for boron removal to produce solar grade silicon（SOG-Si） from metallurgical grade silicon（MG-Si）,has attracted increasing attention.In this paper,Na_2CO_3-SiO_2 systems were chosen as the sodium-based refining slag materials for boron removal from molten silicon.Furthermore,the effect of Al_2O_3 addition for boron removal was studied in detail,which showed that an appropriate amount of Al_2O_3 can help retention of the basicity of the slags,hence improving the boron removal rate.展开更多
基金This work was partly supported by the Program for Changjiang Scholars and Innovative Research Team in University （PCSIRT） under grant no. IRT1146 a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions （PAPD）+1 种基金 a project funded by the Natural Science Foundation of the Jiangsu Higher Education Institutions under grant no. 13KJB430016 and a project funded by the Natural Science Foundation of the Jiangsu province under grant no. BK20141460.
基金This work was partly supported by the Program for Changjiang Scholars and Innovative Research Team in University （PCSIRT） [Grant number IRT1146] a project funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions （PAPD）+1 种基金 a project funded by the Natural Science Foundation of Jiangsu Higher Education Institutions [Grant number 13KJB430016] and a project funded by the Natural Science Foundation of the Jiangsu Province [Grant number BK20141460].
文摘Slag refining,as an important option for boron removal to produce solar grade silicon（SOG-Si） from metallurgical grade silicon（MG-Si）,has attracted increasing attention.In this paper,Na_2CO_3-SiO_2 systems were chosen as the sodium-based refining slag materials for boron removal from molten silicon.Furthermore,the effect of Al_2O_3 addition for boron removal was studied in detail,which showed that an appropriate amount of Al_2O_3 can help retention of the basicity of the slags,hence improving the boron removal rate.
