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

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• 作者：Xiaodong Ma ; ^{maxd@iis.u-tokyo.ac.jp} ; Takeshi Yoshikawa ; Kazuki Morita
• 关键词：Si&ndash ; Sn&ndash ; B alloy ; Phase relation ; B solubility ; Thermodynamic property
• 刊名：Journal of Alloys and Compounds
• 出版年：2012
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：15 July, 2012
• 卷：529
• 期：Complete
• 页码：12-16
• 文件大小：567 K

摘要

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.