Dust core, method for manufacturing the dust core, inductor including the dust core, and electronic / electric device mounted with the inductor

摘要

A dust core containing a powder of a crystalline magnetic material and a powder of an amorphous magnetic material, the inductor having such a dust core can improve DC superposition characteristics and reduce iron loss A dust core comprising a powder of a crystalline magnetic material and a powder of an amorphous magnetic material as a dust core, the content of the powder of the crystalline magnetic material and the content of the powder of the amorphous magnetic material The mass ratio of the content of the crystalline magnetic material powder to the total sum is 20 mass% or less, and the median diameter D50 of the amorphous magnetic material powder is crystalline. 90% of the volume-based cumulative particle size distribution of the crystalline magnetic material powder having a median diameter D50 or more of the magnetic material powder and a 10% cumulative diameter D10a in the volume-based cumulative particle size distribution of the amorphous magnetic material powder Ratio Seki径 D90b are provided dust core is 0.3 or more 2.6 or less.