JPS5358497A - Cobalttdoped acicular magnetic iron oxide and process for preparing same - Google Patents

Cobalttdoped acicular magnetic iron oxide and process for preparing same

Info

Publication number
JPS5358497A
JPS5358497A JP13090777A JP13090777A JPS5358497A JP S5358497 A JPS5358497 A JP S5358497A JP 13090777 A JP13090777 A JP 13090777A JP 13090777 A JP13090777 A JP 13090777A JP S5358497 A JPS5358497 A JP S5358497A
Authority
JP
Japan
Prior art keywords
cobalttdoped
iron oxide
magnetic iron
preparing same
acicular magnetic
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.)
Pending
Application number
JP13090777A
Other languages
English (en)
Japanese (ja)
Inventor
Iyuurugen Betsukeru Hansu
Buretsutoshiyunaider Herumuuto
Kesuteru Eeberuharuto
Shiyutetsuku Ueruneru
Ooringeru Manfureeto
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 JPS5358497A publication Critical patent/JPS5358497A/ja
Pending 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)
JP13090777A 1976-11-06 1977-11-02 Cobalttdoped acicular magnetic iron oxide and process for preparing same Pending JPS5358497A (en)

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 (1)

Publication Number Publication Date
JPS5358497A true JPS5358497A (en) 1978-05-26

Family

ID=5992614

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13090777A Pending JPS5358497A (en) 1976-11-06 1977-11-02 Cobalttdoped acicular magnetic iron oxide and process for preparing same

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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3262812A (en) * 1964-03-26 1966-07-26 Gen Electric Magnetic recording tape with magnetic layer of oxide coated iron-cobalt alloy particles in a binder
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
BE790376A (fr) * 1971-10-27 1973-02-15 Ampex Particules d'oxyde de fer magnétique dopé au cobalt
NL180000C (nl) * 1972-04-21 1986-12-16 Anvar Werkwijze voor de bereiding van een fijnverdeeld poeder uit een vaste oplossing van met een of meer tweewaardige metalen gesubstitueerd gamma-feÿ2oÿ3.

Also Published As

Publication number Publication date
GB1589355A (en) 1981-05-13
FR2369998B1 (de) 1981-10-16
DE2650890C2 (de) 1985-12-12
FR2369998A1 (fr) 1978-06-02
DE2650890A1 (de) 1978-05-11

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