摘要 |
PROBLEM TO BE SOLVED: To provide a dust core whose permeability is hardly deteriorated even when an applied magnetic field is increased in intensity. SOLUTION: This dust core is mainly formed of Fe-based soft magnetic powder, if that initial permeability is represented byμ0, and permeability is represented byμ, when an applied magnetic field is 24 kA/m,μ0 andμmeet a formula,μ/μ0>=0.5, and the dust core is composed of 60 to 75 vol.% soft magnetic powder, having an aspect ratio (L2/L1) of 1 to 1.5 and the residual vol.% insulating binder, and the insulating binder content amounts to 5 to 20 pts.wt. with respect to 100 pts.wt. soft magnetic powder.
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