MnZn soft magnetic ferrite material with high frequency, low temperature coefficient and low loss and preparation method thereof

The invention discloses a MnZn soft magnetic ferrite material with high frequency, low temperature coefficient and low loss and a preparation method thereof. The material employs 68 wt%-72 wt% of Fe2O3, 5 wt%-9 wt% of ZnO, and the balance MnO as main components, and is prepared by steps of first ball milling, first sintering, second material preparing, second ball milling, granulation, compaction molding, second sintering and the like. The innovativeness of the invention is that by appropriate component proportions, ion composite doping and substituting and material preparation technology, a domain-wall-free structure is formed, domain wall resonance is inhibited, and the obtained MnZn power magnetic ferrite can work at a frequency highest to 5 MHz, and the material has relatively high temperature stability and relatively low power loss. 本发明公开了种具有高频低温度系数低损耗MnZn软磁铁氧体材料及其制备方法，该材料以FeO：68wt％～72wt％、ZnO：5wt％～9wt％、MnO：余量为主成分，通过次球磨、次烧结、二次配料、二次球磨、造粒、压制成型、二次烧结等步骤制备而成。本发明的创新性在于通过合适的成分配比，离子复合掺杂与替代和材料制备技术，形成了无畴壁结构，抑制了畴壁共振