MECHANICAL ACTIVATION OF IRON AND VANADIU M-OXIDES IN ORDER TO OBTAINNANOMETRIC VANADIUM FERRITE SIMILAR TO A SOFT CHEMISTRY COMPOUND

Go-milling of iron and vanadium oxides allows us to obtain an intimate oxide mixture at a nanoscale, similar to a coprecipitate elaborated b y soft chemistry. Reduction of such a mixture in the same temperature and oxygen partial pressure conditions (500 degrees C and 10(-25) Pa) as the soft chemistry produces leads to a nanometric vanadium ferrite with only a spinel phase. Homogeneity of grain size and chemical compo sition is reached if the initial oxides have similar grain sizes. (C) Academie des Sciences/Elsevier, Paris.