WIDE-TEMPERATURE LOW-LOSS MNZN FERRITE MATERIAL, AND PREPARATION METHOD THEREFOR

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A wide-temperature low-loss MnZn ferrite material, and a preparation method therefor. The wide-temperature low-loss MnZn ferrite material comprises principal components and auxiliary components; the principal components are : 52.5-53.8mol% of Fe2O3, 8.8-12mol% of ZnO, the remainder being MnO; the auxiliary components comprise : 0.35-0.5wt% of Co2O3, 0.03-0.08wt% of CaSiO3, 0.01-0.04wt% of Nb2O5, 0.05-0.12wt% of TiO22, and RE elements comprising one or more of 0-0.04wt% of Gd2O3, 0-0.02wt% of Ho2O3, and 0-0.03wt% of Ce2O3; the auxiliary components are calculated in percentage by weight with respect to the total amount of Fe2O3, MnO, and ZnO. The preparation method relates to mixing, at a specific ratio, pre-sintering materials obtained under different pre-sintering conditions until said pre-sintering materials are distributed uniformly, and after adding auxiliary components into the mixed pre-sintering materials, grinding the pre-sintering materials together with the auxiliary components to reach an average particle size of 1.2-1.6 µm. The manganese-zinc ferrite material prepared using the present method has lower power loss, high magnetic permeability, and high saturation magnetic flux density in a temperature range of 25°Ϲ to 140°Ϲ.