JPS4921695A - - Google Patents

Info

Publication number
JPS4921695A
JPS4921695A JP48044697A JP4469773A JPS4921695A JP S4921695 A JPS4921695 A JP S4921695A JP 48044697 A JP48044697 A JP 48044697A JP 4469773 A JP4469773 A JP 4469773A JP S4921695 A JPS4921695 A JP S4921695A
Authority
JP
Japan
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
JP48044697A
Other languages
Japanese (ja)
Other versions
JPS5649856B2 (enrdf_load_stackoverflow
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
Priority claimed from FR7214215A external-priority patent/FR2180575B1/fr
Priority claimed from FR7301110A external-priority patent/FR2213919A2/fr
Application filed filed Critical
Publication of JPS4921695A publication Critical patent/JPS4921695A/ja
Publication of JPS5649856B2 publication Critical patent/JPS5649856B2/ja
Expired 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
    • 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
    • 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)
  • Soft Magnetic Materials (AREA)
JP4469773A 1972-04-21 1973-04-21 Expired JPS5649856B2 (enrdf_load_stackoverflow)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7214215A FR2180575B1 (enrdf_load_stackoverflow) 1972-04-21 1972-04-21
FR7301110A FR2213919A2 (en) 1973-01-12 1973-01-12 Solid solns of gamma-ferric oxide with divalent metals - - for use in magnetic recording tapes

Publications (2)

Publication Number Publication Date
JPS4921695A true JPS4921695A (enrdf_load_stackoverflow) 1974-02-26
JPS5649856B2 JPS5649856B2 (enrdf_load_stackoverflow) 1981-11-25

Family

ID=26217047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4469773A Expired JPS5649856B2 (enrdf_load_stackoverflow) 1972-04-21 1973-04-21

Country Status (6)

Country Link
JP (1) JPS5649856B2 (enrdf_load_stackoverflow)
CH (1) CH569676A5 (enrdf_load_stackoverflow)
DE (1) DE2320182C2 (enrdf_load_stackoverflow)
GB (1) GB1432808A (enrdf_load_stackoverflow)
IT (1) IT982802B (enrdf_load_stackoverflow)
NL (1) NL180000C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63501834A (ja) * 1985-09-30 1988-07-21 サントル・ナシヨナル・ド・ラ・ルシエルシエ・シヤンテイフイツク・（セ・エ−ヌ・エ−ル・エス） 間隙スピネル構造の粒状磁性酸化物、その製造方法およびその利用

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096080A (en) * 1973-12-26 1978-06-20 Agence Nationale De Valorisation De La Recherche (Anvar) Solid solutions of magnetic oxides and method of preparation
DE2639250C2 (de) * 1976-09-01 1985-12-12 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von nadelförmigem, kobaltdotiertem magnetischem Eisenoxid
DE2650890C2 (de) * 1976-11-06 1985-12-12 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von nadelförmigem, kobaltdotiertem, magnetischem Eisenoxid
DE2705967C2 (de) * 1977-02-12 1990-01-04 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid
DE2935444A1 (de) * 1979-09-01 1981-03-19 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von nadelfoermigen ferrimagnetischem eisenoxid
RU2761198C1 (ru) * 2021-04-16 2021-12-06 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ивановский государственный химико-технологический университет" Способ получения феррита кобальта

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB679172A (en) * 1948-04-23 1952-09-17 Standard Telephones Cables Ltd Improvements in or relating to the production of metal or metal oxide powders and products therefrom
US3317574A (en) * 1961-07-21 1967-05-02 Sony Corp Method of making finely divided ferrous metal salts of organic acids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63501834A (ja) * 1985-09-30 1988-07-21 サントル・ナシヨナル・ド・ラ・ルシエルシエ・シヤンテイフイツク・（セ・エ−ヌ・エ−ル・エス） 間隙スピネル構造の粒状磁性酸化物、その製造方法およびその利用

Also Published As

Publication number Publication date
GB1432808A (en) 1976-04-22
JPS5649856B2 (enrdf_load_stackoverflow) 1981-11-25
DE2320182A1 (de) 1973-10-31
NL180000C (nl) 1986-12-16
CH569676A5 (enrdf_load_stackoverflow) 1975-11-28
NL7305050A (enrdf_load_stackoverflow) 1973-10-23
IT982802B (it) 1974-10-21
DE2320182C2 (de) 1982-07-01

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