| 摘要 |
PROBLEM TO BE SOLVED: To provide a powder magnetic core of high performance having a low core loss, high initial magnetic permeabilityμi, quality coefficient Q, flat DC superposition characteristics, and excellent insulation characteristics in combination by using iron-based metal powder of a high saturation magnetic flux density Bs and to provide magnetite-iron-cobalt composite powder which is the metal powder appropriate for realization of the same and a method for manufacturing the same. SOLUTION: The magnetite-iron-cobalt composite powder for powder magnetic core contains magnetite, and has the average primary particle diameter of 0.7 to 5.0μm, a bulk density of 0.6 to 2.5 g/cm<SP>3</SP>, and a cobalt content of 0.01 to 3mass%. COPYRIGHT: (C)2008,JPO&INPIT
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