| 摘要 |
PROBLEM TO BE SOLVED: To provide composite magnetic powder capable of obtaining a dust core having high electric resistivity by specifically rationalizing a structure from an inside to a surface of the composite magnetic powder, and a dust core obtained using the composite magnetic powder.SOLUTION: The present invention relates to composite magnetic powder 10 formed by binding many soft magnetic particles 11 by a binder resin. When a surface approximate line A and an inner line D are drawn in a cross-section passing the approximate center O of the composite magnetic powder 10, the inner line being located at an approximate 1/4 distance from the approximate center of the composite magnetic powder toward the surface approximate line A and being similar to the surface approximate line A, the small particle size ratio of the soft magnetic particles 11 on the surface approximate line A is greater than that of the soft magnetic particles on the inner line D, a first intermediate line C and a second intermediate line B. |
