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Article: Research data from E. Povodenkaradeniz and colleagues update understanding of phase equilibria and diffusion.
- Article from:
- Journal of Technology
- Article date:
- August 18, 2009
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"The La-Fe and the La-Fe-O systems are assessed using the Calphad approach, and the Gibbs energy functions of ternary oxides are presented. Oxygen and mutual La and Fe solubilities in body-centered cubic (bcc) and face-centered cubic (fcc) structured metallic phases are considered in the modeling," investigators in Zurich, Switzerland report.
"Oxygen nonstoichiometry of perovskite-structured La-1 +/- x Fe-1 +/- y O3-delta is modeled using the compound energy formalism (CEF), and the model is submitted to a defect chemistry analysis. The contribution to the Gibbs energy of LaFeO3 due to a magnetic order-disorder transition is included in the model description. ...