Title:
COMPOSITE MAGNETIC MATERIAL AND PROCESS FOR PRODUCTION THEREOF
Document Type and Number:
WIPO Patent Application WO/2012/001943
Kind Code:
A1
Abstract:
Disclosed is a composite magnetic material produced through a step of mixing a metal magnetic powder with an insulating binder to produce a mixed powder, a step of press-molding the mixed powder to produce a molded material, and a step of heating the molded material in an oxidative atmosphere at 80 to 400˚C inclusive to form an oxide coating film on the surface of the molded material. The metal magnetic powder is composed of Si, Fe and a component (A) and has such a chemical composition that the content of Si is 5.5 to 9.5 wt% inclusive, the sum total of the contents of Si and the component (A) is 10 to 13.5 wt% inclusive, and the remainder is made up by Fe, and the component (A) comprises at least one component selected from Ni, Al, Ti and Mg.
Inventors:
MATSUTANI, Nobuya (())
松谷 伸哉 (())
松谷 伸哉 (())
Application Number:
JP2011/003666
Publication Date:
January 05, 2012
Filing Date:
June 28, 2011
Export Citation:
Assignee:
PANASONIC CORPORATION (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
MATSUTANI, Nobuya (())
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
MATSUTANI, Nobuya (())
International Classes:
B22F3/24; B22F1/00; B22F3/00; C22C38/00; H01F1/24; H01F1/33; H01F41/02
Attorney, Agent or Firm:
NAITO, Hiroki et al. (1006 Oaza Kadoma, Kadoma-sh, Osaka 01, 〒5718501, JP)
Claims: