Kinetics of thermal decomposition of Co3O4 powder and single crystals |
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Authors: | Andrzej Ma?ecki Jalees AK Tareen Jean Pierre Doumerc Louis Rabardel Jean Claude Launay |
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Institution: | Laboratoire de Chimie du Solide du CNRS, 351, cours de la Libe´ration, 33405 Talence Cedex, France |
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Abstract: | Kinetics of thermal decomposition in vacuum of Co3O4 powder as well as single crystals has been investigated. Discrepancies with the results of previous authors have been discussed. Decomposition of Co3O4 proceeds through formation of a compact layer of CoO and hence diffusion is the rate-limiting factor. The experimental curves α(t) be described for 0.05 < α < 0.85 using a modified Ginstling-Brounshtein equation: 1 ? 2α/3 ? (1 ? α)2/3 = ktn where the activation energy varies with the degree of decomposition. |
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Keywords: | To whom correspondence is to be addressed |
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