METHOD FOR PRODUCING PHOSPHORIC ACID-SURFACE TREATED SOFT MAGNETIC POWDER, AND PHOSPHORIC ACID-SURFACE TREATED SOFT MAGNETIC POWDER

摘要

To provide a method for phosphoric acid surface treatment that can sufficiently improve insulation resistance of particulate soft magnetic powder, and a related technique thereto.SOLUTION: A method for producing phosphoric acid-surface treated soft magnetic powder has a surface treatment step of mixing soft magnetic powder containing Fe with surface treatment liquid containing phosphoric acid and/or a salt thereof and organic solvent, for surface treating of the soft magnetic powder.SELECTED DRAWING: None