| 摘要 |
PROBLEM TO BE SOLVED: To provide a powder magnetic core as a high performance magnetic element having reduced eddy current loss using iron based metal powder having a high saturated magnetic flux density Bs, and to provide magnetite-iron composite powder as metal powder suitable for realizing the same. SOLUTION: The magnetite-iron composite powder for a powder magnetic core comprises magnetite, and in which the average primary particle diameter is 0.7 to 3.0μm, bulk density is 0.6 to 2.1 g/cm<SP>3</SP>, and the content of chromium is 0.01 to 0.5 mass%. COPYRIGHT: (C)2007,JPO&INPIT
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