Coupled Experimental and Thermodynamic Optimization of the Na sub(2)O-FeO-Fe sub(2)O sub(3)-Al sub(2)O sub(3) System: Part 2. Thermodynamic Optimization

A complete thermodynamic description of the Na sub(2)O-FeO-Fe sub(2)O sub(3)-Al sub(2)O sub(3) system was conducted based on the critical evaluation and optimization of available thermodynamic properties and phase diagram data. The thermodynamic behavior of the liquid solution was described using th...

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Veröffentlicht in:Journal of the American Ceramic Society 2016-02, Vol.99 (2), p.715-722
Hauptverfasser: Moosavi-Khoonsari, Elmira, Jung, In-Ho
Format: Artikel
Sprache:eng
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Zusammenfassung:A complete thermodynamic description of the Na sub(2)O-FeO-Fe sub(2)O sub(3)-Al sub(2)O sub(3) system was conducted based on the critical evaluation and optimization of available thermodynamic properties and phase diagram data. The thermodynamic behavior of the liquid solution was described using the Modified Quasichemical Model, and the solid solutions Na(Al,Fe)O sub(2) meta-oxides and Na sub(2)(Al,Fe) sub(12)O sub(19) Na- beta double prime -alumina were modeled using the Compound Energy Formalism considering their sublattice structures. Most experimental phase diagram data at reducing and oxidizing conditions were reproduced within 3 mol% of compositional error ranges. Many unexplored phase diagrams of this system under different oxygen partial pressures were predicted within the estimated accuracy of plus or minus 5 mol% in composition and plus or minus 50 K in temperature from the present thermodynamic models with optimized parameters.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.14002