Thermodynamic properties of Fe3O4 FeAl2O4 spinel solid solution

Petric, A and Jacob, KT and Alcock, CB (1981) Thermodynamic properties of Fe3O4 FeAl2O4 spinel solid solution. In: Journal of the American Ceramic Society, 64 (11). pp. 632-639.

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Abstract

The Gibbs energy of mixing for the system Fe3O4-FeAl2O4 was determined at 1573 K using a gas-metal-oxide equilibration technique. Oxide solid solution samples were equilibrated with Pt foils under controlled CO+CO2 gas streams. The equilibrium iron concentration in the foil was determined by chemical analysis. The cation distribution between tetrahedral and octahedral sites in the spinel crystal can be calculated from site-preference energies and used as an alternate method of determining some thermodynamic properties, including the Gibbs energy of mixing. The solvus occurring at low temperatures in the system Fe3C4-FeAl2C4 was used to derive the effect of lattice distortion due to cation size difference on the enthalpy of mixing and to obtain a better approximation to the measured thermodynamic quantities.

Item Type:	Journal Article
Publication:	Journal of the American Ceramic Society
Publisher:	John Wiley and Sons
Additional Information:	Copyright of this article belongs to John Wiley and Sons.
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	05 Dec 2011 06:23
Last Modified:	18 Mar 2013 08:46
URI:	http://eprints.iisc.ac.in/id/eprint/42550

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