IT982802B - Procedimento di preparazione di soluzioni solide di ossido di ferro e metalli bivalenti quali il cobalto e prodotti ottenuti - Google Patents

Procedimento di preparazione di soluzioni solide di ossido di ferro e metalli bivalenti quali il cobalto e prodotti ottenuti

Info

Publication number
IT982802B
IT982802B IT2319773A IT2319773A IT982802B IT 982802 B IT982802 B IT 982802B IT 2319773 A IT2319773 A IT 2319773A IT 2319773 A IT2319773 A IT 2319773A IT 982802 B IT982802 B IT 982802B
Authority
IT
Italy
Prior art keywords
cobalt
preparation
iron oxide
solid solutions
obtained products
Prior art date
Application number
IT2319773A
Other languages
English (en)
Italian (it)
Original Assignee
Anvar
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 by Anvar filed Critical Anvar
Application granted granted Critical
Publication of IT982802B publication Critical patent/IT982802B/it

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
IT2319773A 1972-04-21 1973-04-19 Procedimento di preparazione di soluzioni solide di ossido di ferro e metalli bivalenti quali il cobalto e prodotti ottenuti IT982802B (it)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7214215A FR2180575B1 (de) 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 (1)

Publication Number Publication Date
IT982802B true IT982802B (it) 1974-10-21

Family

ID=26217047

Family Applications (1)

Application Number Title Priority Date Filing Date
IT2319773A IT982802B (it) 1972-04-21 1973-04-19 Procedimento di preparazione di soluzioni solide di ossido di ferro e metalli bivalenti quali il cobalto e prodotti ottenuti

Country Status (6)

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

Families Citing this family (7)

* 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
FR2587990B1 (fr) * 1985-09-30 1987-11-13 Centre Nat Rech Scient Compositions d'oxydes magnetiques particulaires a structure de type spinelle lacunaire, leur preparation et leur application
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

Also Published As

Publication number Publication date
JPS5649856B2 (de) 1981-11-25
NL7305050A (de) 1973-10-23
DE2320182A1 (de) 1973-10-31
GB1432808A (en) 1976-04-22
CH569676A5 (de) 1975-11-28
NL180000C (nl) 1986-12-16
DE2320182C2 (de) 1982-07-01
JPS4921695A (de) 1974-02-26

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