BE828540A - Oxydes de fer magnetiques contenant du cobalt, hautement coercities eta remanence stabilisee - Google Patents

Oxydes de fer magnetiques contenant du cobalt, hautement coercities eta remanence stabilisee

Info

Publication number
BE828540A
BE828540A BE155908A BE155908A BE828540A BE 828540 A BE828540 A BE 828540A BE 155908 A BE155908 A BE 155908A BE 155908 A BE155908 A BE 155908A BE 828540 A BE828540 A BE 828540A
Authority
BE
Belgium
Prior art keywords
coercities
remanence
stabilized
highly
magnetic iron
Prior art date
Application number
BE155908A
Other languages
English (en)
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 filed Critical
Publication of BE828540A publication Critical patent/BE828540A/fr

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
    • G11B5/70663—Preparation processes specially adapted therefor, e.g. using stabilising agents
BE155908A 1975-02-21 1975-04-29 Oxydes de fer magnetiques contenant du cobalt, hautement coercities eta remanence stabilisee BE828540A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752507420 DE2507420A1 (de) 1975-02-21 1975-02-21 Remanenzstabilisierte hochkoerzitive cobalthaltige magnetische eisenoxide

Publications (1)

Publication Number Publication Date
BE828540A true BE828540A (fr) 1975-08-18

Family

ID=5939416

Family Applications (1)

Application Number Title Priority Date Filing Date
BE155908A BE828540A (fr) 1975-02-21 1975-04-29 Oxydes de fer magnetiques contenant du cobalt, hautement coercities eta remanence stabilisee

Country Status (2)

Country Link
BE (1) BE828540A (fr)
DE (1) DE2507420A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4053325A (en) * 1976-09-14 1977-10-11 Pfizer Inc. Heat stable iron oxides
DE2801395C2 (de) * 1978-01-13 1982-04-22 Bayer Ag, 5090 Leverkusen Thermisch stabilisiertes ferrimagnetisches Eisenoxid
DE2815712A1 (de) * 1978-04-12 1979-10-25 Bayer Ag Eisenoxide zur magnetischen signalaufzeichnung und verfahren zu deren herstellung
US4209412A (en) * 1978-05-22 1980-06-24 Hercules Incorporated Process for producing nonstoichiometric ferroso-ferric oxides
DE2903593C3 (de) * 1979-01-31 1982-05-06 Bayer Ag, 5090 Leverkusen Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung
JPS5819733A (ja) * 1981-07-28 1983-02-04 Toshiba Corp 磁気記録媒体及びその製造方法
DE3322746C2 (de) * 1983-06-24 1994-06-23 Basf Ag Magnetische Aufzeichnungsträger
DE3429678A1 (de) * 1984-08-11 1986-06-12 Basf Farben + Fasern Ag, 2000 Hamburg Verfahren zur herstellung eines mischphasenpigmentes auf der basis von eisenoxid und chromoxid

Also Published As

Publication number Publication date
DE2507420A1 (de) 1976-08-26

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: BAYER A.G.

Effective date: 19860430