Methods for manufacturing dual phase soft magnetic components include combining a plurality of soft ferromagnetic particles with a plurality of paramagnetic particles to form a component structure, wherein the plurality of soft ferromagnetic particles each comprise an electrically insulative coating, and, heat treating the component structure to consolidate the plurality of soft ferromagnetic particles with the plurality of paramagnetic particles.

The objective is to provide a soft magnetic metal powder-compact magnetic core and a reactor with an excellent DC superposition characteristic. The soft magnetic metal powder-compact magnetic core contains a soft magnetic metal powder, boron nitride and a silicon compound, when its section is ground and then observed, the ratio of the area occupied by the soft magnetic metal powder to that of the section of the soft magnetic metal powder-compact magnetic core is 90% or more and 95% or less, and a roundness of the section of 80% or more of the particles constituting the soft magnetic metal powder is 0.75 or more and 1.0 or less, and boron nitride exists in 70% or more of the voids-among-multiple-particles among the voids-among-multiple-particles in the section of the soft magnetic metal powder-compact magnetic core. Thus, the soft magnetic metal powder-compact magnetic core with an excellent DC superposition characteristic can be obtained.

A soft magnetic metal powder or the like from which a soft magnetic metal fired body can be provided has a high magnetic permeability and a specific resistance and is contained in a coil-type electronic component having sufficiently high inductance L and Q value and unlikely to be plating-extended and short-circuited. A soft magnetic metal powder contains soft magnetic metal particles containing at least Fe and Ni. Said soft magnetic metal powder further contains P, Si, Cr and/or M. M is at least one selected from among B, Co, Mn, Ti, Zr, Hf, Nb, Ta, Mo, Mg, Ca, Sr, Ba, Zn, Al, and rare earth elements. The content of each element is within a predetermined range.

An element body 4 includes a metal particle dispersion element 15 in which metal particles 12 are dispersed. A surface of the metal particle dispersion element 15 includes an indicator area 10. The indicator area 10 includes a recess 10a having a predetermined depth measured from a reference plane L of the metal particle dispersion element 15. The predetermined depth D1 is deeper than D50 of the metal particles 12 included in the metal particle dispersion element 15.

Disclosed in the present application is a preparation method for an iron-nickel magnetic powder core material. The preparation method comprises the following steps: (1) mixing iron-nickel powder and an organic coating agent to perform primary coating treatment, and then successively performing drying and annealing to obtain primary passivated iron-nickel powder; and (2) mixing the primary passivated iron-nickel powder obtained in step (1) and an aqueous solution of an inorganic coating agent to perform secondary coating treatment, and then drying same to obtain secondary passivated iron-nickel powder; and (3) mixing the secondary passivated iron-nickel powder obtained in step (2) and a binder, and then successively performing granulation, baking and pressing to obtain an iron-nickel magnetic powder core material. The preparation method provided by the present application can achieve an excellent coating effect on the surfaces of iron-nickel powder and achieve a stable coating layer structure, and can effectively reduce the introduction of carbon, thus further improving the inductance and saturation characteristics of the iron-nickel magnetic powder core material.