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Solid-Solid Reaction, I: Experimental Study of Barium Metatitane Synthesis

Abstract : The solid-state reaction between barium carbonate and rutile powders to form barium metatitane BaTiO3 was studied by themogravimetric 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 : Monday, July 19, 2010 - 8:47:54 AM
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  • HAL Id : emse-00503798, version 1


Michel Cournil, Michel Soustelle, Gérard Thomas. Solid-Solid Reaction, I: Experimental Study of Barium Metatitane Synthesis. Oxidation of Metals, Springer Verlag, 1979, 13 (1), pp.77-88. ⟨emse-00503798⟩



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