Metallic magnetic powder and manufacturing method of the same, magnetic painting, magnetic powder for magnetic therapy and magnetic recording medium

摘要

To provide a metallic magnetic powder wherein a primary particle of each metallic magnetic particle constituting the metallic magnetic powder is a powder without forming an aggregate, and a manufacturing method of the same comprising the steps of: manufacturing a metallic magnetic powder constituted of metallic magneticparticles, containing a metallic magnetic phase, with Fe, or Fe and Co as main components, rare earth elements (wherein yttrium is also treated as the rare earth element), one kind or more non-magnetic components such as A1 and Si; removing the non-magnetic component from the metallic magnetic particle, by making a reducing agent act thereon, while making a complexing agent exist for forming a complex with the non-magnetic component in water; oxidizing the metallic magnetic particle with the non-magnetic component removed; substituting water adhered to the oxidized metallic magnetic particle, with an organic solvent; and
coating the surface of the metallic magnetic particle with an organic matter different from the organic solvent, in a state of maintaining a wet condition of the metallic magnetic particle, with the organic solvent adhered thereto.