Thermodynamic Modeling of the Ta2O5-SnO2 Phase Diagram

A phase diagram of Ta2O5–SnO2 system was modeled thermodynamically with experimental data available in the literatures. The excess Gibbs energies of the solution phases were described on the basis of the Redlich‐Kister solution models. A consistent set of optimized interaction parameters was derived...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2012-12, Vol.95 (12), p.4004-4007
Main Author: Kim, Sung S.
Format: Article
Language:English
Subjects:
Ceramics
Interaction parameters
Liquids
Mathematical models
Miscibility gap
Modelling
Phase diagrams
Solidus
Thermodynamics
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Summary:A phase diagram of Ta2O5–SnO2 system was modeled thermodynamically with experimental data available in the literatures. The excess Gibbs energies of the solution phases were described on the basis of the Redlich‐Kister solution models. A consistent set of optimized interaction parameters was derived for describing the Gibbs energy of each phase in this system leading to a good fit between calculation and experimental data. The liquidus, solidus, and solvus were calculated and also the lattice stabilities of the components were estimated. In addition, tentative activity diagram and the metastable miscibility gaps in the liquid, α‐tantala, and cassiterite phases were calculated from the present thermodynamic modeling.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2012.05436.x