Composite particles and dust core

摘要

PROBLEM TO BE SOLVED: To provide composite particles capable of achieving both high density and high electrical insulation when pressure-molded. SOLUTION: A composite particle 100 includes a soft magnetic iron-based particle 10, a coating layer 20 provided on the surface of the soft magnetic iron-based particle 10, and a spherical nanopowder in which at least a part thereof is arranged in the coating layer 20. It comprises a body 30 and. The coating layer 20 is a layer of a compound containing Fe, Si, O, B, and N, and the nanopowder 30 is selected from the group consisting of Fe, Si, Zr, Co, Al, Mg, Mn, and Ni. It is a powder of a compound containing at least one element, O, and N. [Selection diagram] Fig. 1