Thermodynamic Properties of the MgO-BO_<1.5> Binary System at 1723K

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概要

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• To determine the thermodynamic properties of the MgO-BO<SUB>1.5</SUB> binary system, the following reaction was used:<BR><BR> MO<I><SUB>n</SUB></I>(in slag)+<I>n</I>C(gr.)=M(in liquid copper)+<I>n</I>CO (g)<BR><BR> where MO<I><SUB>n</SUB></I> represents MgO or BO<SUB>1.5</SUB>. <BR>The activity coefficients of boron and magnesium in liquid copper were first determined by equilibrating pure liquid B<SUB>2</SUB>O<SUB>3</SUB> or pure solid MgO with liquid copper under controlled CO partial pressure in a graphite crucible at 1723K: <BR><BR>ln γ<SUB>B</SUB>=0.82+2.81<I>x</I><SUB>B</SUB>, ln γ<SUB>Mg</SUB>=-1.22 (<I>x</I><SUB>B</SUB>≤0.106, <I>x</I><SUB>Mg</SUB>≤0.0013)<BR><BR> The themodynamic properties of MgO and BO<SUB>1.5</SUB> in MgO-BO<SUB>1.5</SUB> binary slag at 1723K were determined as a function of composition by equilibrating the MgO-BO<SUB>1.5</SUB> slag with liquid copper under CO atmosphere. In addition, the interaction parameter (εMgB) in the Cu-B-Mg alloy was determined to be -100 at 1723K.

• 社団法人 日本鉄鋼協会の論文
• 1996-02-15

著者

• Fujisawa T

  Nagoya Univ. Nagoya Jpn

• Yamauchi C

  Department Of Materials Science And Engineering Graduate School Of Engineering Nagoya University

• HUANG Xianming

  Graduate School of Engineering, Nagoya University

• FUJISAWA Toshiharu

  School of Engineering, Nagoya University

• YAMAUCHI Chikabumi

  School of Engineering, Nagoya University

• Huang Xianming

  Graduate School Of Engineering Nagoya University

• Fujisawa Toshiharu

  School Of Engineering Nagoya University

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• Thermodynamic Properties of the MgO-BO_-SiO_2 System at 1723K
• Thermodynamic Properties of the MgO-BO_ Binary System at 1723K

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