BE828540A - MAGNETIC IRON OXIDES CONTAINING COBALT, HIGHLY COERCITIES AND A STABILIZED REMANENCE - Google Patents

MAGNETIC IRON OXIDES CONTAINING COBALT, HIGHLY COERCITIES AND A STABILIZED REMANENCE

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
French (fr)
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/en

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 MAGNETIC IRON OXIDES CONTAINING COBALT, HIGHLY COERCITIES AND A STABILIZED REMANENCE BE828540A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752507420 DE2507420A1 (en) 1975-02-21 1975-02-21 Cobalt modified ferric oxide - with additions of phosphates or oxides of transition metals, shows reduced remanence less and good stability of coercivity

Publications (1)

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

Family

ID=5939416

Family Applications (1)

Application Number Title Priority Date Filing Date
BE155908A BE828540A (en) 1975-02-21 1975-04-29 MAGNETIC IRON OXIDES CONTAINING COBALT, HIGHLY COERCITIES AND A STABILIZED REMANENCE

Country Status (2)

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

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 (en) * 1978-01-13 1982-04-22 Bayer Ag, 5090 Leverkusen Thermally stabilized ferrimagnetic iron oxide
DE2815712A1 (en) * 1978-04-12 1979-10-25 Bayer Ag IRON OXIDES FOR MAGNETIC SIGNAL RECORDING AND PROCESS FOR THEIR PRODUCTION
US4209412A (en) * 1978-05-22 1980-06-24 Hercules Incorporated Process for producing nonstoichiometric ferroso-ferric oxides
DE2903593C3 (en) * 1979-01-31 1982-05-06 Bayer Ag, 5090 Leverkusen Cobalt-doped ferrimagnetic iron oxides and processes for their production
JPS5819733A (en) * 1981-07-28 1983-02-04 Toshiba Corp Magnetic recording medium and its manufacture
DE3322746C2 (en) * 1983-06-24 1994-06-23 Basf Ag Magnetic recording media
DE3429678A1 (en) * 1984-08-11 1986-06-12 Basf Farben + Fasern Ag, 2000 Hamburg METHOD FOR PRODUCING A MIXED-PHASE PIGMENT BASED ON IRON OXIDE AND CHROMOXIDE

Also Published As

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

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: BAYER A.G.

Effective date: 19860430