Thermodynamic Analysis of Binary and Ternary Silicate Systems by a Structural Model.

• Romero-Serrano Antonio

  Metallurgy and Materials Department, Instituto Politecnico Nacional-ESIQIE

• Pelton Arthur D.

  Centre for Research in Computational Thermochemistry, Ecole Polytechnique

Abstract

A critical evaluation of the thermodynamic properties as well as the phase diagrams for the systems MgO-SiO₂ and FeO-SiO₂ is performed with a structural model and for the systems MnO-MgO, FeO-MnO and FeO-MgO through the regular solution model.<br> The structural model for binary silicate melts is now extended to ternary systems. It is shown that, for systems SiO₂-AO-BO, random mixing of cations A²⁺ and B²⁺ occurs when the oxides AO and BO behave in a similar way with silicate. If the AO-SiO₂ and BO-SiO₂ binary systems exhibit similar thermodynamic behavior, that is comparable free energies of mixing, the properties of the ternary SiO₂-AO-BO can be extrapolated from those binary systems in a straightforward fashion. This condition is found in simple silicates such as SiO₂-MnO-MgO, SiO₂-FeO-MnO and SiO₂-FeO-MgO systems where the activities and liquidus temperatures calculated solely from data on the binary sub-systems are in good agreement with measured ternary data.

Journal

• ISIJ International

  ISIJ International 39 (5), 399-408, 1999

  The Iron and Steel Institute of Japan

Keywords

• molten silicates
• ternary systems
• structural model

Details

• CRID: 1390001206453361920
• NII Article ID: 10002462969
• NII Book ID: AA10680712
• DOI: 10.2355/isijinternational.39.399
• COI: 1:CAS:528:DyaK1MXkslOrtL4%3D
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/39/5/39_5_399/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed