Thermodynamic modeling of La2O3–SrO–Mn2O3–Cr2O3 for solid oxide fuel cell applications

The thermodynamic La–Sr–Mn–Cr–O oxide database is obtained as an extension of thermodynamic descriptions of oxide subsystems using the calculation of phase diagrams approach. Concepts of the thermodynamic modeling of solid oxide phases are discussed. Gibbs energy functions of SrCrO4, Sr2.67Cr2O8, Sr...

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Bibliographic Details
Published in:Journal of materials research 2012-08, Vol.27 (15), p.1915-1926
Main Authors: Povoden-Karadeniz, E., Chen, M., Ivas, Toni, Grundy, A.N., Gauckler, L.J.
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Biomaterials
Electrodes
Electrolytes
Energy
Entropy
Equilibrium
Heat
Inorganic Chemistry
Materials Engineering
Materials research
Materials Science
Nanotechnology
Solid oxide fuel cells
Solid solutions
Studies
Temperature
Thermodynamics
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Summary:The thermodynamic La–Sr–Mn–Cr–O oxide database is obtained as an extension of thermodynamic descriptions of oxide subsystems using the calculation of phase diagrams approach. Concepts of the thermodynamic modeling of solid oxide phases are discussed. Gibbs energy functions of SrCrO4, Sr2.67Cr2O8, Sr2CrO4, and SrCr2O4 are presented, and thermodynamic model parameters of La–Sr–Mn–Chromite perovskite are given. Experimental solid solubilities and nonstoichiometries in La1−xSrxCrO3−δ and LaMn1−xCrxO3−δ are reproduced by the model. The presented oxide database can be used for applied computational thermodynamics of traditional lanthanum manganite cathode with Cr-impurities. It represents the fundament for extensions to higher orders, aiming on thermodynamic calculations in noble symmetric solid oxide fuel cells.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2012.149