SOFT MAGNETIC COMPOSITE MATERIAL, METHOD FOR PRODUCING THE SAME, AND ELECTROMAGNETIC CIRCUIT COMPONENT

摘要

PROBLEM TO BE SOLVED: To provide a soft magnetic composite material which has all properties of high magnetic permeability, low coercive force and low iron loss that an Fe-3Si alloy particle phase or an Fe-Si-Al alloy particle phase has, while keeping high saturation magnetic flux density that a pure iron particle originally has, and to provide a method for producing the soft magnetic composite material.

SOLUTION: The soft magnetic composite material is produced by compacting the mixture of the Fe-3Si alloy particle, the Fe-Si-Al alloy particle and a pure iron particle and firing the compacted mixture and has a plurality of the Fe-3Si alloy particle phases, a plurality of the Fe-Si-Al alloy particle phases and a plurality of pure iron particle phases each of which is present on the grain boundary surrounded by at least three of Fe-3Si alloy particle phases or Fe-Si-Al alloy particle phases. The content of the pure iron particle phases is 3-10 mass% to the whole mass of the Fe-3Si alloy particle phase, the Fe-Si-Al alloy particle phase and the pure iron particle phase.

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