Activity measurement of CaO-SiO2-AlO1.5-MgO slags equilibrated with molten silicon alloys

Kousuke Kume, Kazuki Morita, Takahiro Miki, Nobuo Sano

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36 Citations (Scopus)


The activities of components in the CaO-SiO2-AlO1.5-MgO slags at 1 823 and 1 873 K were directly measured by equilibrating the slags with Si based alloys. For the CaO-SiO2, CaO-SiO2-AlO1.5 and CaO-SiO2-MgO systems, thermodynamic properties of Si based alloys and the activity data of SiO2 obtained from the distribution of each element between slags and the alloys in the previous paper were used to derive the activities of AlO1.5, CaO and MgO. For the CaO-SiO2-AlO1.5-MgO quaternary system, the activities of components other than SiO2 on the 10 mass% MgO plane were determined at 1 873 K by employing the SiO2 activities available in the literature. Accordingly, it was confirmed that the activities of components other than SiO2 in multi-component silicate stag systems can be determined by this technique as long as the activity datum of at least one component in the systems is available.

Original languageEnglish
Pages (from-to)561-566
Number of pages6
JournalIsij International
Issue number6
Publication statusPublished - 2000

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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