Investigation of Magnetic Phase Formation in Nickel-Zinc Ferrites by X-Ray Diffraction and Thermal Analysis

Abstract

The magnetic spinel phase formation in Ni_1-xZn_xFe₂O₄ (x=0.1, 0.3, 0.5) nickel-zinc ferrite synthesized from mechanically activated NiO-ZnO-Fe₂O₃ mixture was studied by thermomagnetometry method, X-ray diffraction and saturation magnetization analyses. The initial reagents were activated via milling the mixture in a planetary ball mill at 500 and 1000 rpm. The Ni-Zn ferrites were synthesized at 950 °C for 4 hours using the solid-state technology. The correlation between the results obtained using above methods of testing ferrite was revealed. It was found that the magnetic spinel phase concentration in the synthesized samples increases with an increase in the milling energy intensity of mixture. Thus, ferrite obtained from pre-activated at 1000 rpm oxides is characterized by a high concentration of nickel-zinc ferrite in their composition.