Thermodynamics of oxides with spinel structure in the Ni-Mn-Fe-О system

doi:10.26565/2220-637X-2012-21-38

M. A. Zinovik
E. V. Zinovik

DOI: https://doi.org/10.26565/2220-637X-2012-21-38

Keywords: thermodynamic analysis, Gibbs energy, enthalpy, entropy, reaction of spinel forming, reaction of oxides (ions) transformations, oxides blending, spinel properties prognosis, solid solutions

Abstract

We have done the thermodynamic analysis of the formation of spinel oxides that contain metals with variable valency. It was shown that under the synthesis temperature the direction of the reaction of spinel formation is determined by the direction of the reaction of oxides (ions) transformations that accompany the process; the blending energy does not change this direction of the process. These results make up the basis for physico-chemical grounds of thermodynamic method for spinel properties prognosis.

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