Phase relations and thermodynamic property of boron in the silicon-tin melt at 1673 K

作者：Ma Xiaodong^*; Yoshikawa Takeshi; Morita Kazuki

来源：Journal of Alloys and Compounds, 2012, 529: 12-16.

DOI：10.1016/j.jallcom.2012.03.057

• Si-Sn-B alloy
• Phase relation
• B solubility
• Thermodynamic property

In order to optimize the removal of B during the Si refining process using a Si-Sn solvent, thermodynamic property of B in the melt is crucial. In this study, the isothermal section for the Si-Sn-B system at 1673 K was measured by the equilibration of the liquid phase with B solid solution or silicon boride. The activity coefficient of B in the Si-Sn melt at 1673 K was evaluated, which was found to be three orders of magnitude larger in the Sn-rich side than that in the Si-rich side. This result suggests the removal of B can be achieved easily from the Si-Sn melt with the larger Sn content.

• 出版日期2012-7-15