Metallurgical and Materials Transactions B

, Volume 35, Issue 5, pp 877–889 | Cite as

Critical thermodynamic evaluation and optimization of the FeO-Fe2O3-MgO-SiO2 system

  • In-Ho Jung
  • Sergei A. Decterov
  • Arthur D. Pelton


A complete literature review, critical evaluation, and thermodynamic modeling of the phase diagrams and thermodynamic properties of all oxide phases in the FeO-Fe2O3-MgO-SiO2 system at 1 bar total pressure are presented. Optimized model equations for the thermodynamic properties of all phases are obtained, which reproduce all available thermodynamic and phase-equilibrium data within experimental error limits from 25 °C to above the liquidus temperatures at all compositions and oxygen partial pressures. The complex phase relationships in the system have been elucidated, and discrepancies among the data have been resolved. The database of the model parameters can be used along with software for Gibbs-energy minimization in order to calculate all thermodynamic properties and any type of phase-diagram section. The modified quasichemical model was used for the liquid-slag phase. Sublattice models, based upon the compound-energy formalism, were used for the olivine, spinel, pyroxene, and monoxide solid solutions. The use of physically reasonable models means that the models can be used to predict thermodynamic properties and phase equilibria in composition and temperature regions where data are not available.


Olivine Material Transaction Oxygen Partial Pressure Tridymite Calculated Phase Diagram 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 2004

Authors and Affiliations

  • In-Ho Jung
    • 1
  • Sergei A. Decterov
    • 2
  • Arthur D. Pelton
    • 2
  1. 1.the New Metals Research TeamResearch Institute of Industrial Science & Technology (RIST)PohangSouth Korea
  2. 2.the Centre de Recherche en Calcul Thermochimique (CRCT)Ecole Polytechnique de MontréalMontréalCanada

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