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Solid-solid reactions, I: Experimental study of barium metatitanate synthesis

Abstract : The solid-state reaction between barium carbonate and rutile powders to form barium metatitanate BaTiO3 was studied by thermogravimetric analysis, X rays, and microscopy. Phase-stability domains were drawn in a temperature - PCO2 diagram. The dependence of the reaction kinetics on PCO2, PO2 , or PN2 is discussed. In particular, the rate continuously decreases when PCO2 or PN2 increases, but it reaches a maximum as a function of PO2. For given partial pressures of gases and temperature the kinetics curves (conversion degree vs.time) may be interpreted by a "hampered"-diffusion mechanism.
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Submitted on : Friday, July 22, 2011 - 2:21:39 PM
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  • HAL Id : emse-00610557, version 1


Michel Cournil, Michel Soustelle, Gérard Thomas. Solid-solid reactions, I: Experimental study of barium metatitanate synthesis. Oxidation of Metals, Springer Verlag, 1979, 13 (1), pp.77-88. ⟨emse-00610557⟩



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