Manufacturing method and powder magnetic core of iron-based soft magnetic powder and its dust core for iron-based soft magnetic powder for dust core

摘要

PROBLEM TO BE SOLVED: To provide iron-based soft magnetic powder for a dust core with superior thermal stability, which can effectively insulate iron powder particles from one another even when rare metal, which is difficult to obtain and is expensive, is not used and even when an insulating material is reduced in amount for high-density molding, and is excellent in mechanical strength, and further can maintain electric insulation even when a high-temperature heat treatment is carried out; to provide a method of manufacturing the iron-based soft magnetic powder for the dust core; and to provide the dust core.;SOLUTION: On a surface of the iron-based soft magnetic powder, a phosphoric acid-based conversion coating and a silicone resin coating are formed in order from inside, and the phosphoric acid-based conversion coating contains P, B, Mg, and Al.;COPYRIGHT: (C)2011,JPO&INPIT