Manganese-zinc ferrite with high magnetic permeability at negative temperature and low loss at high temperature and method for preparing same

Abstract

A manganese-zinc ferrite with a high magnetic permeability at negative temperature and low loss at high temperature consists of Fe2O3, MnO and ZnO, and additives consisting of CaCO3, ZrO2, Co2O3 and SnO2 are also added. A method for preparing the manganese-zinc ferrite is further provided. According to the method, by reasonably adjusting a ratio of Mn to Zn to Fe and appropriately increasing the content of Co in the additives, a manganese-zinc ferrite material with both a high magnetic permeability and low loss at about −20° C. and low loss at 120-140° C. is obtained. The manganese-zinc ferrite material has two loss valleys at about −20° C. and about 100° C. in a temperature range of −30° C. to 140° C., which expands the application range of the manganese-zinc ferrite material.

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