METHOD FOR PRODUCING SOFT MAGNETIC METAL POWDER COATED WITH Mg-CONTAINING OXIDE FILM AND METHOD FOR PRODUCING COMPOSITE SOFT MAGNETIC MATERIAL FROM THE POWDER

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a soft magnetic metal powder coated with an Mg-containing oxide film and to provide a method for producing a composite soft magnetic material from the soft magnetic metal powder coated with the Mg-containing oxide film. SOLUTION: The soft magnetic metal powder coated with the Mg-containing oxide film is produced by mixing a soft magnetic metal powder heat-treated at 40 to 500°C in an oxidizing atmosphere with an Mg powder, and then heating or heating and tumbling a mixed powder at 150 to 1,100°C in an inert gas or in a vacuum atmosphere under a pressure of 1×10-12to 1×10-1MPa. The composite soft magnetic material is produced from the soft magnetic metal powder coated with the Mg-containing oxide film. COPYRIGHT: (C)2006,JPO&NCIPI