| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing an Fe-Co based composite soft magnetic sintered material with high density and permeability. SOLUTION: An Fe-Co based soft magnetic powder covered with coarse grain size ferrite wherein the surface of an Fe-Co based soft magnetic powder having an average particle size D<SB>1</SB>of 30-200μm is covered with a ferrite layer having a spinel structure, and an Fe-Co based soft magnetic powder covered with micro grain size ferrite wherein the surface of an Fe-Co based soft magnetic powder having an average particle size D<SB>2</SB>of 0.05-0.5D<SB>1</SB>μm is covered with a ferrite layer having a spinel structure, are mixed at such a combination that the Fe-Co based soft magnetic powder covered with micro grain size ferrite covering is 5-30 vol.%, with the remaining part composed of the Fe-Co based soft magnetic powder covered with coarse grain size ferrite, thereby obtaining a mixed powder, and the mixed powder is made into a green compact and sintered thereafter. COPYRIGHT: (C)2003,JPO
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