SOFT MAGNETIC MATERIAL AND DUST CORE

摘要

A soft magnetic material comprising multiple composite magnetic grains (30), wherein each of the multiple composite magnetic grains (30) has metal magnetic grain (10), insulating film (20) surrounding the surface of metal magnetic grain (10) and composite coating (22) encircling the outer surface of the insulating film (20). The composite coating (22) has heat resistance imparting protection film (24) surrounding the surface of insulating film (20) and flexible protection film (26) surrounding the surface of heat resistance imparting protection film (24). As a result, there is obtained a soft magnetic material that excels in moldability and is capable of satisfactorily suppressing any iron loss through desirable functioning of the insulating film, and obtained a relevant dust core.