CaO-MgO-SiO<SUB>2</SUB>-Al<SUB>2</SUB>O<SUB>3</SUB>系鉱滓のSiO<SUB>2</SUB>およびAl<SUB>2</SUB>O<SUB>3</SUB>の活量

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  • Activity of SiO<SUB>2</SUB> and Al<SUB>2</SUB>O<SUB>3</SUB> in the Slag of CaO-MgO-SiO<SUB>2</SUB>-Al<SUB>2</SUB>O<SUB>3</SUB>-System
  • CaO-MgO-SiO2-Al2O3系鉱滓のSiO2およびAl2O3の活量
  • CaO-MgO-SiO2-Al2O3ケイ コウシ ノ SiO2 オヨビ Al2O3 ノ カツリョウ

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Our previous reports treated the determination of activity of SiO2 and Al2O3 in the slag of CaO-SiO2-Al2O3 system using the e.m.f method of double cell. In this study, the authors investigated the effect of MgO on the activity of SiO2 and Al2O3. From the experimental results, at constant Al2O3, the activity coefficient of SiO2 γSiO<SUB>2</SUB> was found to increase as more MgO was substituted for CaO increase. With the addition of MgO, the slag system approaches the Raoult’s law. At constant MgO series, the amphoteric nature of Al2O3 was confermed as in CaO-SiO2-Al2O3 system. Concerning the effect of MgO on the activity of Al2O3, an intimate relation exists between aAl<SUB>2O3</SUB> and basicity. Chosing the basicity NCaO+MgO⁄NSiO<SUB>2</SUB>, the relationship between logaAl<SUB>2O3</SUB> and the basicity correspond to the results obtained in the slag of CaO-SiO2-Al2O3 system. The above facts indicate the behaviour of MgO to act as base.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 25 (2), 136-139, 1961

    公益社団法人 日本金属学会

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