A New Model for Initial Sintering of Oxide Powders Under Controlled Gaseous Atmosphere
Initial sintering of oxide powders annealed at moderate temperatures corresponds to a surface area reduction or particle growth without increase in density and mechanical toughness of the material. Applications of ultrafine oxide powders in the field of catalysis requires a good thermal stability. More often such materials do not exhibit the appropriate high surface area during a long period at temperatures in the range 800–1200 K. The decrease in surface area as a function of time has already been studied by several authors, as for example, in the case of MgO1,2, ZnO3 and transition alumina4.
KeywordsWater Vapour Partial Pressure Oxide Powder Tio2 Anatase Transition Alumina
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