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Thermodynamic Assessment of the Gallium‐Oxygen System
Author(s) -
Zinkevich Matvei,
Aldinger Fritz
Publication year - 2004
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2004.00683.x
Subject(s) - gallium , phase diagram , thermodynamics , gibbs free energy , stoichiometry , binary system , ideal solution , calphad , phase (matter) , binary number , chemistry , materials science , physics , metallurgy , mathematics , arithmetic , organic chemistry
The experimental information relevant to the Ga‐O binary system has been critically assessed. A self‐consistent set of Gibbs energy functions describing the phases in this system and a phase diagram are presented for the first time. The adjustable parameters of the models are obtained by a least‐squares fit to the experimental data. The liquid phase is described by Hillert's partially ionic liquid model. The gallium oxides (α‐, β‐, γ‐, and δ‐Ga 2 O 3 ) are modeled as stoichiometric phases. The gas phase is treated as an ideal solution of the species Ga, Ga 2 , Ga 2 O, GaO, O, O 2 , and O 3 . The calculated phase diagram and thermodynamic properties agree very well with most of the experimental measurements.