(19)
(11) EP 0 654 801 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.07.1995 Bulletin 1995/27

(43) Date of publication A2:
24.05.1995 Bulletin 1995/21

(21) Application number: 94114972.6

(22) Date of filing: 22.09.1994
(51) International Patent Classification (IPC)6: H01F 1/055, H01F 1/057, H01F 1/058, H01F 1/059, H01F 1/03, H01F 1/09
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 11.11.1993 JP 282717/93

(71) Applicant: SEIKO EPSON CORPORATION
Shinjuku-ku Tokyo-to (JP)

(72) Inventors:
  • Kitazawa, Atsunori, c/o Seiko Epson Corp.
    Suwa-shi, Nagano-ken (JP)
  • Ishibashi, Toshiyuki, c/o Seiko Epson Corp.
    Suwa-shi, Nagano-ken (JP)
  • Akioka, Koji, c/o Seiko Epson Corp.
    Suwa-shi, Nagano-ken (JP)

(74) Representative: Hoffmann, Eckart, Dipl.-Ing. 
Patentanwalt, Bahnhofstrasse 103
82166 Gräfelfing
82166 Gräfelfing (DE)


(56) References cited: : 
   
       


    (54) Magnetic powder, permanent magnet produced therefrom and process for producing them


    (57) A magnetic powder and a permanent magnet are provided which have magnetic properties enhanced by magnetic interaction. Disclosed are a magnetic powder comprising a mixture of two or more powders including a magnetic powder A (residual magnetic flux density: BrA, coercive force: HcA) and a magnetic powder B (residual magnetic flux density: BrB, coercive force: HcB) of which the residual magnetic flux densities and the coercive forces have the following relationships: BrA>BrB and HcA<HcB, and a bonded magnet or a sintered magnet produced from the magnetic powder, and a method for mixing magnetic powders and a process for producing a magnet.






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