STRUCTURAL AND MAGNETIC CHARACTERISTIC OF NOVEL METHOD OF FE2O3 DOUBLE-RIGHT-ARROW FE3O4 REDUCTION BY MAGNETOMECHANICAL ACTIVATION

A magnetomechanical activation technique has been used to produce fine particles of magnetite from hematite. The phase transformation of Fe2 O3 into Fe3O4 was effected at room temperature by wet milling in vacuu m. X-ray diffraction acid scanning electron microscopy methods were us ed to find detailed information on the crystallography and morphology of magnetite formation as a function of processing time. A correlation was established between magnetic hysteresis parameters and the observ ed crystal structure evolution.