SOFT-MAGNETIC MNZN SYSTEM POWER FERRITE

摘要

The invention discloses a soft-magnetic MnZn system power ferrite, and aims at providing a soft-magnetic MnZn system power ferrite with high saturation magnetic flux density and low loss. The soft-magnetic MnZn system power ferrite comprises a main component and an auxiliary component; the main component comprises Fe₂O₃, MnO, ZnO and NiO; calculated on the basis of the total weight of the main component, Fe₂O₃ accounts for 53.0-55.0mol%, ZnO accounts for 3.0-7.0mol%, NiO accounts for 0-1.0mol%, and MnO accounts for the balance; and the auxiliary component comprises CoO, SiO₂, CaCO₃, Nb₂O₅ and ZrO₂. The soft-magnetic MnZn system power ferrite has the beneficial effects that the saturation magnetic flux density Bs at 100°C is larger than 460mT, and the magnetic core loss Pcv at 100°C is smaller than 320kW/m³; the soft-magnetic MnZn system power ferrite has such favorable performance, so that a device can be further miniaturized in the actual application of a product; and because of rather low loss, the work efficiency of the device can also be further increased.