发明公开
EP0863501A2 Plate-like ferrite particles with magnetoplumbite structure and magnetic card using the same
失效
Ferritteilchen vom Magnetoplumbittyp und Magnetkarte damit
- 专利标题： Plate-like ferrite particles with magnetoplumbite structure and magnetic card using the same
- 专利标题（中）： Ferritteilchen vom Magnetoplumbittyp und Magnetkarte damit
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申请号： EP98301568.6申请日： 1998-03-03
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公开(公告)号： EP0863501A2公开(公告)日： 1998-09-09
- 发明人: Yamamoto, Akinori , Sanada, Kazutoshi , Yamamoto, Shigehisa
- 申请人： TODA KOGYO CORPORATION
- 申请人地址： 7-1 Yokogawa-Shinmachi, Nishi-ku Hiroshima-shi, Hiroshima-ken JP
- 专利权人： TODA KOGYO CORPORATION
- 当前专利权人： TODA KOGYO CORPORATION
- 当前专利权人地址： 7-1 Yokogawa-Shinmachi, Nishi-ku Hiroshima-shi, Hiroshima-ken JP
- 代理机构： Woods, Geoffrey Corlett
- 优先权： JP67448/97 19970304
- 主分类号： G11B5/706
- IPC分类号： G11B5/706
摘要：
Plate-like ferrite particles with magnetoplumbite structure have a composition represented by the general formula of AO•n{(Fe 1-(a+b) Bi a M b ) 2 O 3 } wherein A is Ba, Sr or Ba-Sr; M is Zn-Nb, Zn-Ta or Zn-Sn; n is from 5.5 to 6.1; a is from 0.001 to 0.005; b is from 0.050 to 0.120; and the ratio of b/a is from 20 to 50. These particles are used in magnetic cards.
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