Abstract
Abstract Mn/Fe and Fe/Co mixed oxides with spinel structure were prepared by low-temperature (300–400°C) thermal decomposition of carbonate precursors. The oxide samples are cation-deficient phases with average oxidation state of the metal ions of ca. 3·0, and consist of fine particles (ca. 10 nm) which are single crystalline domains with few lattice distortions. Gas adsorption measurements reveal values of specific surface area between 30 and 120 m 2 g −1 and the presence of an interparticle porous system. Pelletized aggregates of selected compositions sinter to almost theoretical densities at 1000°C and release oxygen excess from the spinel structure. The sintered pellets show little intergranular porosity.
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