| 摘要 |
PROBLEM TO BE SOLVED: To provide a dust core having high initial permeability. SOLUTION: This dust core is composed mainly of soft magnetic powder, containing Si in an amount of 0.5-15 mass%, Al in the amount of <=10 mass%, and the balance Fe with traces of inevitable impurities and having an apparent density/true density ratio of 0.4-0.55. The volume occupying ratio of the soft magnetic power in the dust core is adjusted to >=80 vol.%, and the initial permeability of the core at 100 kHz is adjusted to be >=125. Preferably, the soft magnetic powder is manufactured by atomizing method. |
