JPS5330497A - 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
JPS5330497A
JPS5330497A JP10275477A JP10275477A JPS5330497A JP S5330497 A JPS5330497 A JP S5330497A JP 10275477 A JP10275477 A JP 10275477A JP 10275477 A JP10275477 A JP 10275477A JP S5330497 A JPS5330497 A JP S5330497A
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
JP10275477A
Other languages
English (en)
Inventor
Yurugen Betsukeru Hansu
Kesuteru Eeberuharuto
Ooringeru Manfureeto
Shiyutetsuku Ueruneru
Shienafuingeru Ezuaruto
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 JPS5330497A publication Critical patent/JPS5330497A/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

  • Compounds Of Iron (AREA)
  • Hard Magnetic Materials (AREA)
JP10275477A 1976-09-01 1977-08-29 Cobalttdoped acicular magnetic iron oxide and process for preparing same Pending JPS5330497A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762639250 DE2639250C2 (de) 1976-09-01 1976-09-01 Verfahren zur Herstellung von nadelförmigem, kobaltdotiertem magnetischem Eisenoxid

Publications (1)

Publication Number Publication Date
JPS5330497A true JPS5330497A (en) 1978-03-22

Family

ID=5986842

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10275477A Pending JPS5330497A (en) 1976-09-01 1977-08-29 Cobalttdoped acicular magnetic iron oxide and process for preparing same

Country Status (6)

Country Link
JP (1) JPS5330497A (ja)
BE (1) BE858222A (ja)
DE (1) DE2639250C2 (ja)
FR (1) FR2363521A1 (ja)
GB (1) GB1583256A (ja)
NL (1) NL7709413A (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5413997A (en) * 1977-07-04 1979-02-01 Sony Corp Magnetic recording medium and its manufacture
JPS589453B1 (ja) * 1978-03-17 1983-02-21 Burroughs Corp
JPS5864221A (ja) * 1981-10-09 1983-04-16 Ishihara Sangyo Kaisha Ltd コバルト被着強磁性酸化鉄の製造方法
JPS5922262B1 (ja) * 1969-05-19 1984-05-25 Burroughs Corp
JPS6117221A (ja) * 1984-06-25 1986-01-25 Konishiroku Photo Ind Co Ltd 磁気記録媒体
JPH02283623A (ja) * 1989-03-15 1990-11-21 Bayer Ag Ｃｏ―含有磁性顔料の製造法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1603213A (en) * 1977-04-20 1981-11-18 Hitachi Maxell Cobalt containing iron oxide magnetic particles and method for the preparation of the same
US4209412A (en) * 1978-05-22 1980-06-24 Hercules Incorporated Process for producing nonstoichiometric ferroso-ferric oxides
DE3413752A1 (de) * 1984-04-12 1985-10-24 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung isotroper magnetischer, kobalthaltiger eisenoxide
DE3631193A1 (de) * 1986-09-13 1988-03-24 Bayer Ag Magnetische eisenoxidpigmente und verfahren zu ihrer herstellung
DE4319572A1 (de) * 1993-06-14 1994-12-15 Toda Kogyo Corp Co-haltige Eisenoxidpigmente, Verfahren zu ihrer Herstellung und diese enthaltende magnetische Medien

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
GB1268458A (en) * 1969-05-07 1972-03-29 Ampex Improvements in and relating to the preparation of cobalt doped gamma ferric oxide
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.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922262B1 (ja) * 1969-05-19 1984-05-25 Burroughs Corp
JPS5413997A (en) * 1977-07-04 1979-02-01 Sony Corp Magnetic recording medium and its manufacture
JPS589453B1 (ja) * 1978-03-17 1983-02-21 Burroughs Corp
JPS5864221A (ja) * 1981-10-09 1983-04-16 Ishihara Sangyo Kaisha Ltd コバルト被着強磁性酸化鉄の製造方法
JPS6117221A (ja) * 1984-06-25 1986-01-25 Konishiroku Photo Ind Co Ltd 磁気記録媒体
JPH02283623A (ja) * 1989-03-15 1990-11-21 Bayer Ag Ｃｏ―含有磁性顔料の製造法

Also Published As

Publication number Publication date
FR2363521B1 (ja) 1981-08-21
NL7709413A (nl) 1978-03-03
DE2639250C2 (de) 1985-12-12
FR2363521A1 (fr) 1978-03-31
GB1583256A (en) 1981-01-21
DE2639250A1 (de) 1978-03-09
BE858222A (fr) 1978-02-28

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