FR2369998A1 - Oxyde de fer magnetique aciculaire dope par du cobalt et son procede de preparation - Google Patents

Oxyde de fer magnetique aciculaire dope par du cobalt et son procede de preparation

Info

Publication number
FR2369998A1
FR2369998A1 FR7733181A FR7733181A FR2369998A1 FR 2369998 A1 FR2369998 A1 FR 2369998A1 FR 7733181 A FR7733181 A FR 7733181A FR 7733181 A FR7733181 A FR 7733181A FR 2369998 A1 FR2369998 A1 FR 2369998A1
Authority
FR
France
Prior art keywords
cobalt
degrees
iron oxide
oxide doped
preparation process
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.)
Granted
Application number
FR7733181A
Other languages
English (en)
French (fr)
Other versions
FR2369998B1 (de
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of FR2369998A1 publication Critical patent/FR2369998A1/fr
Application granted granted Critical
Publication of FR2369998B1 publication Critical patent/FR2369998B1/fr
Granted 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

Landscapes

  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
FR7733181A 1976-11-06 1977-11-04 Oxyde de fer magnetique aciculaire dope par du cobalt et son procede de preparation Granted FR2369998A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762650890 DE2650890C2 (de) 1976-11-06 1976-11-06 Verfahren zur Herstellung von nadelförmigem, kobaltdotiertem, magnetischem Eisenoxid

Publications (2)

Publication Number Publication Date
FR2369998A1 true FR2369998A1 (fr) 1978-06-02
FR2369998B1 FR2369998B1 (de) 1981-10-16

Family

ID=5992614

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7733181A Granted FR2369998A1 (fr) 1976-11-06 1977-11-04 Oxyde de fer magnetique aciculaire dope par du cobalt et son procede de preparation

Country Status (4)

Country Link
JP (1) JPS5358497A (de)
DE (1) DE2650890C2 (de)
FR (1) FR2369998A1 (de)
GB (1) GB1589355A (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4276183A (en) * 1978-10-25 1981-06-30 Pfizer Inc. Cobalt modified magnetic iron oxide
DE3044340A1 (de) 1980-11-25 1982-06-24 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von hochkoerzitivem nadelfoermigem gamma-eisen(iii)oxid
AU548794B2 (en) 1981-07-28 1986-01-02 Ishihara Sangyo Kaisha Ltd. Process for producing cobalt containing ferromagnetic iron oxides
US4521372A (en) * 1981-08-26 1985-06-04 Nuclear Monitoring Systems & Management Corporation Apparatus and method for monitoring stored material
EP0076462B2 (de) * 1981-10-01 1991-01-16 Agency Of Industrial Science And Technology Verfahren zur Herstellung magnetischer Teilchen
DE3616096A1 (de) * 1986-05-13 1987-11-19 Basf Ag Verfahren zur herstellung kobalthaltiger, nadelfoermiger, magnetischer eisenoxide
DE3631193A1 (de) * 1986-09-13 1988-03-24 Bayer Ag Magnetische eisenoxidpigmente und verfahren zu ihrer herstellung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1095134A (en) * 1964-03-26 1967-12-13 Gen Electric Improvements in magnetic recording medium
FR2157896A1 (de) * 1971-10-27 1973-06-08 Ampex
DE2320182A1 (de) * 1972-04-21 1973-10-31 Anvar Verfahren zur herstellung fester loesungen aus oxiden des eisens und zweiwertigen metallen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573980A (en) * 1968-02-19 1971-04-06 Minnesota Mining & Mfg Method of making magnetic particles and recording tape
JPS4810994B1 (de) * 1969-07-26 1973-04-09

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1095134A (en) * 1964-03-26 1967-12-13 Gen Electric Improvements in magnetic recording medium
FR2157896A1 (de) * 1971-10-27 1973-06-08 Ampex
DE2320182A1 (de) * 1972-04-21 1973-10-31 Anvar Verfahren zur herstellung fester loesungen aus oxiden des eisens und zweiwertigen metallen

Also Published As

Publication number Publication date
GB1589355A (en) 1981-05-13
FR2369998B1 (de) 1981-10-16
DE2650890C2 (de) 1985-12-12
DE2650890A1 (de) 1978-05-11
JPS5358497A (en) 1978-05-26

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