| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-performance dust core in which iron-based powder having high saturated magnetic flux density is used and which has high insulation properties, a low core loss and high corrosion resistance in a well-balanced state and to provide magnetite-iron composite powder suitable for producing the high-performance dust core and a method for manufacturing the magnetite-iron composite powder. SOLUTION: The magnetite-iron composite powder has 0.7-5.0μm average primary particle size and contains 0.01-5 mass% talc, which is stuck to the surfaces of particles of the magnetite-iron composite powder, one or more metals selected from Co, Ni, Cr, B and V by≥0.01 mass% and <5 mass% in total and magnetite. COPYRIGHT: (C)2008,JPO&INPIT
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