IRON-BASE SOFT MAGNETIC POWDER FOR DUST CORES, MANUFACTURING METHOD THEREOF, AND DUST CORE

摘要

This iron-base soft magnetic powder for dust cores comprises a phosphate conversion film formed on the surface of the iron-base soft magnetic powder, wherein the phosphate conversion film contains the element nickel, and the content ratio of the element aluminum in the phosphate conversion film is less than or equal to the content ratio of aluminum in the aforementioned powder. Excellent thermal stability enables maintaining electrical insulation properties even when subjected to high-temperature heat treatment.