HK1020389A1 - Oxide magnetic material, ferrite particles, sintered magnet, bonded magnet, magnetic recording medium, and motor. - Google Patents

Oxide magnetic material, ferrite particles, sintered magnet, bonded magnet, magnetic recording medium, and motor.

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Publication number
HK1020389A1
HK1020389A1 HK99105483A HK99105483A HK1020389A1 HK 1020389 A1 HK1020389 A1 HK 1020389A1 HK 99105483 A HK99105483 A HK 99105483A HK 99105483 A HK99105483 A HK 99105483A HK 1020389 A1 HK1020389 A1 HK 1020389A1
Authority
HK
Hong Kong
Prior art keywords
motor
recording medium
magnet
ferrite particles
magnetic material
Prior art date
Application number
HK99105483A
Other languages
English (en)
Inventor
Hitoshi Taguchi
Kazumasa Iida
Kiyoyuki Masuzawa
Yoshihiko Minachi
Original Assignee
Tdk Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26397847&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=HK1020389(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Tdk Corp filed Critical Tdk Corp
Publication of HK1020389A1 publication Critical patent/HK1020389A1/xx

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G11B5/658—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing oxygen, e.g. molecular oxygen or magnetic oxide
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    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2641—Compositions containing one or more ferrites of the group comprising rare earth metals and one or more ferrites of the group comprising alkali metals, alkaline earth metals or lead
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HK99105483A 1997-02-25 1999-11-26 Oxide magnetic material, ferrite particles, sintered magnet, bonded magnet, magnetic recording medium, and motor. HK1020389A1 (en)

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JP5685697 1997-02-25
JP27393197 1997-09-19
PCT/JP1998/000764 WO1998038654A1 (fr) 1997-02-25 1998-02-25 Materiau magnetique a base d'oxyde, particule de ferrite, aimant obtenu par frittage, aimant issu d'une liaison, support d'enregistrement magnetique et moteur

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DE69824362T2 (de) * 1997-02-25 2005-06-16 Tdk Corp. Magnetisches Oxidmaterial, Ferritteilchen, gesinterter Magnet, Verbundmagnet, magnetischer Aufzeichnungsträger und Motor
EP0940823B1 (en) * 1997-09-19 2008-03-05 TDK Corporation Sintered magnet
KR20000075715A (ko) 1997-12-25 2000-12-26 마쯔노고오지 페라이트 자석 및 그의 제조방법
US5958284A (en) * 1997-12-29 1999-09-28 Hitachi Metals, Ltd. Ferrite magnet and method for producing same
DE69942213D1 (de) * 1998-01-23 2010-05-12 Hitachi Metals Ltd Verbundmagnet, Herstellungsverfahren dafür und Magnetrolle
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DE69824362T2 (de) 2005-06-16
CN1217812A (zh) 1999-05-26
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US6139766A (en) 2000-10-31
WO1998038654A1 (fr) 1998-09-03
EP0905718B1 (en) 2004-06-09
EP0905718A4 (en) 2000-11-29
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CN1155022C (zh) 2004-06-23
EP0905718A1 (en) 1999-03-31

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