Preparation method of wide-temperature high-frequency low-loss soft magnetic ferrite material for charging pile

The invention relates to the technical field of soft magnetic ferrites, and discloses a preparation method of a wide-temperature high-frequency low-loss soft magnetic ferrite material for a charging pile, the ionic radius of Sm < 3 + > is larger than that of Fe < 3 + >, Fe < 3 + > in a crystal structure can be replaced, and the binding effect of a crystal field on Sm < 3 + > is weaker than that of Fe < 3 + >, so that the saturation flux density of the material is improved; meanwhile, Sm < 3 + > is a non-magnetic ion and does not have magnetic anisotropy, and the number of magnetocrystalline anisotropy ions can be reduced after Fe < 3 + > is replaced, so that the coercive force of the material is effectively reduced; the low-melting-point modifier improves the densification degree of the material through liquid-phase sintering, promotes the increase of the grain size, facilitates the reversible movement of domain walls and the reversible rotation of magnetic domains, and increases the initial permeability of t