Concerning the activation energy of solid state reactions

Determination of the activation energy of solid state reactions without account for changes in reagent imperfections leads to values of the energy of activation and the preexponential factor that are devoid of real physical significance. The behavior of reacting systems is investigated with the help...

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Bibliographic Details
Published in:Journal of solid state chemistry 1974-01, Vol.11 (4), p.340-343
Main Authors: Oleynikov, N.N., Tretyakov, Yu.D., Shumyantzev, A.V.
Format: Article
Language:English
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Summary:Determination of the activation energy of solid state reactions without account for changes in reagent imperfections leads to values of the energy of activation and the preexponential factor that are devoid of real physical significance. The behavior of reacting systems is investigated with the help of ln k = f(1/ T) diagrams for various lattice defect concentrations. A formula is derived which allows one to determine the solid state reaction rate constant for reacting systems with a constant concentration of lattice imperfections. Application of the derived equation is illustrated for the reaction MgO + Fe 2O 3 with reagents of different thermal prehistory.
ISSN:0022-4596
1095-726X
DOI:10.1016/S0022-4596(74)80039-3