DE3484252D1 - Verfahren zur herstellung von kobaltmodifiziertem ferromagnetischem eisenoxyd. - Google Patents

Verfahren zur herstellung von kobaltmodifiziertem ferromagnetischem eisenoxyd.

Info

Publication number
DE3484252D1
DE3484252D1 DE8484107566T DE3484252T DE3484252D1 DE 3484252 D1 DE3484252 D1 DE 3484252D1 DE 8484107566 T DE8484107566 T DE 8484107566T DE 3484252 T DE3484252 T DE 3484252T DE 3484252 D1 DE3484252 D1 DE 3484252D1
Authority
DE
Germany
Prior art keywords
cobal
producing
iron oxide
ferromagnetic iron
modified ferromagnetic
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE8484107566T
Other languages
English (en)
Inventor
Shin-Ichiro Dezawa
Hideaki Kosha
Tatsuji Kitamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Application granted granted Critical
Publication of DE3484252D1 publication Critical patent/DE3484252D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
    • G11B5/70652—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3
    • G11B5/70668—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3 containing a dopant
    • G11B5/70673—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3 containing a dopant containing Co
DE8484107566T 1983-06-29 1984-06-29 Verfahren zur herstellung von kobaltmodifiziertem ferromagnetischem eisenoxyd. Expired - Lifetime DE3484252D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58117770A JPS6011233A (ja) 1983-06-29 1983-06-29 コバルト変性強磁性酸化鉄の製法

Publications (1)

Publication Number Publication Date
DE3484252D1 true DE3484252D1 (de) 1991-04-18

Family

ID=14719888

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484107566T Expired - Lifetime DE3484252D1 (de) 1983-06-29 1984-06-29 Verfahren zur herstellung von kobaltmodifiziertem ferromagnetischem eisenoxyd.

Country Status (4)

Country Link
US (1) US4581251A (de)
EP (1) EP0131223B1 (de)
JP (1) JPS6011233A (de)
DE (1) DE3484252D1 (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4810994B1 (de) * 1969-07-26 1973-04-09
US4064292A (en) * 1972-09-01 1977-12-20 Badische Anilin- & Soda-Fabrik, Aktiengesellschaft Manufacture of cobalt-modified γ-iron(III)oxides
DE2254810C2 (de) * 1972-11-09 1985-12-12 Basf Ag, 6700 Ludwigshafen Verfahren zur Verbesserung der magnetischen Eigenschaften von Gamma-Eisen (III)oxiden
JPS5852806A (ja) * 1981-09-24 1983-03-29 Hitachi Maxell Ltd 磁気記録媒体
JPS58103106A (ja) * 1981-12-15 1983-06-20 Ishihara Sangyo Kaisha Ltd 針状γ−Ｆｅ↓２Ｏ↓３の処理方法
JPS58161706A (ja) * 1982-03-18 1983-09-26 Hitachi Maxell Ltd 強磁性粉末の製造方法
JPS6215490A (ja) * 1985-07-15 1987-01-23 日本核燃料開発株式会社 燃料集合体用格子

Also Published As

Publication number Publication date
US4581251A (en) 1986-04-08
EP0131223B1 (de) 1991-03-13
EP0131223A3 (en) 1987-04-15
JPS6011233A (ja) 1985-01-21
EP0131223A2 (de) 1985-01-16

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition