IRON-BASED SOFT MAGNETIC POWDER AND PRODUCTION METHOD THEREOF

摘要

Disclosed is an iron-based soft magnetic powder obtained by preparing an iron-oxide-based soft magnetic powder through water atomization, and thermally reducing the iron-oxide-based soft magnetic powder. The iron-based soft magnetic powder has an average particle size of 100 µm or more and has an interface density of more than 0 µm-1 and less than or equal to 2.6× 10 -2 µm-1, where the interface density is determined from a cross-sectional area (µm2) and a cross-sectional circumference (µm) of the iron-based soft magnetic powder. The iron-based soft magnetic powder obtained by preparing an iron-oxide-based soft magnetic powder through water atomization and thermally reducing the iron-oxide-based soft magnetic powder, when used for the production of a dust core, can give a dust core having a low coercive force. Also disclosed is a duct core having a low coercive force and exhibiting superior magnetic properties.