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Activities of the components in a spinel solid solution of the Fe-Al-O system

  • Chemical Thermodynamics and Thermochemistry
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Abstract

The conditions of the equilibrium between the Fe3O4-FeAl2O4 solution and wustite are determined by measuring the EMF of galvanic cells containing a solid electrolyte, and the activities of the components in the Fe3O4-FeAl2O4 solution are calculated by treating the results of the experiment on the equilibrium between the spinel solution and wustite. Their properties are found to be different from those of ideal solutions at temperatures of 1000–1300 K. A significant positive deviation from the Raoult’s law is believed to indicate the tendency of the solution to decompose. The experimental data are treated in terms of the theory of regular solutions, assuming the energy of mixing to be a function of temperature only. The critical temperature of decomposition for the Fe3O4-FeAl2O4 solution is found to be 1084 K.

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Authors and Affiliations

  1. South Ural State University, Chelyabinsk, 454080, Russia

    A. A. Lykasov & A. A. Kimyashev

Authors
  1. A. A. Lykasov
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  2. A. A. Kimyashev
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Correspondence to A. A. Kimyashev.

Additional information

Original Russian Text © A.A. Lykasov, A.A. Kimyashev, 2011, published in Zhurnal Fizicheskoi Khimii, 2011, Vol. 85, No. 9, pp. 1612–1614.

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Lykasov, A.A., Kimyashev, A.A. Activities of the components in a spinel solid solution of the Fe-Al-O system. Russ. J. Phys. Chem. 85, 1495–1498 (2011). https://doi.org/10.1134/S0036024411090135

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  • DOI: https://doi.org/10.1134/S0036024411090135

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