Mechanical activation conditions of the Fe2O3 and V2O3 mixture powders in order to obtain a nanometric vanadium spinel ferrite

Go-milling of iron and vanadium oxides allows to obtain an intimate oxides mixture at a nanoscale, similar to a coprecipitate elaborated by soft chemi stry. Reduction of such a mixture in the same temperature and oxygen partia l pressure conditions (500 degrees C and 10(-25) Pa) as the soft chemistry products leads to a nanometric vanadium ferrite with the only spinel phase. The characterization of the powders is achieved by X-ray diffraction (XRD) , scanning electron microscopy, infrared (IR) spectrometry, thermogravimetr y and calorimetry. Homogeneity of grain size and chemical composition is re ached if the initial oxides have similar grain size.