Abstract

The heteronuclearΜ-oxoacetate with the composition [Fe2NiO(CH2COO)6(H2O)3]·2H2O decomposed on heating, forming nickel ferrite NiFe2O4 and (depending on the decomposition conditions) in part other solid phases. H2O, CH3COOH, acetone and CO2 were also formed in the decomposition. A reaction scheme is given for the decomposition. The products were porous powders with grain diameters between 3 and 10Μm. On increase of the temperature of decomposition from 300 to 800 ‡C, the BET surface area and the surface area of the pores decreased, but only a small alteration in grain size was observed. As a result of thermal treatment in the temperature region abone 800‡C, larger aggregates of grains were formed in sintering processes.

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