(19)
(11) EP 0 558 178 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.12.1993 Bulletin 1993/49

(43) Date of publication A2:
01.09.1993 Bulletin 1993/35

(21) Application number: 93300361.8

(22) Date of filing: 20.01.1993
(51) International Patent Classification (IPC)5: H01F 1/37
(84) Designated Contracting States:
DE FR GB NL

(30) Priority: 28.02.1992 JP 78679/92
10.08.1992 JP 234267/92

(71) Applicant: KUREHA KAGAKU KOGYO KABUSHIKI KAISHA
Chuo-ku Tokyo 103 (JP)

(72) Inventors:
  • Tada, Masahito, c/o Kureha Kagaku Kogyo K.K.
    Tokyo 103 (JP)
  • Suzuki, Keiichiro, c/o Kureha Kagaku Kogyo K.K.
    Tokyo 103 (JP)

(74) Representative: Kyle, Diana 
Elkington and Fife Prospect House 8 Pembroke Road
Sevenoaks, Kent TN13 1XR
Sevenoaks, Kent TN13 1XR (GB)


(56) References cited: : 
   
       


    (54) Magnetically permeable composition and soft magnetic component


    (57) Magnetic components having a higher permeability than those obtained from Ni-Zn-based ferrite powder can be obtained by molding a composition comprising 5 - 30 wt. parts of polyarylene sulfide resin and 70 - 95 wt- parts (providing 100 wt. parts with the resin) of Ni-Zn-Cu-based ferrite powder. The Ni-Zn-Cu-based ferrite has a composition represented by the following formula (1):

            NiaZnbCucFe₂Od,


    wherein a, b, c and d are numbers satisfying 0.10 ≦ a ≦ 0.70, 0.10 ≦ b ≦ 0.80, 0.10 ≦ c ≦ 0.35 and 3.97 ≦ d ≦ 4.20.





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