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NL180000C - PROCESS FOR THE PREPARATION OF A FINISHED POWDER FROM A SOLID SOLUTION OF GAMMA-FEŸ2OŸ3 SUBSTITUTED WITH ONE OR MORE TWO-VALUE METALS. - Google Patents

PROCESS FOR THE PREPARATION OF A FINISHED POWDER FROM A SOLID SOLUTION OF GAMMA-FEŸ2OŸ3 SUBSTITUTED WITH ONE OR MORE TWO-VALUE METALS.

Info

Publication number
NL180000C
NL180000C NL7305050A NL7305050A NL180000C NL 180000 C NL180000 C NL 180000C NL 7305050 A NL7305050 A NL 7305050A NL 7305050 A NL7305050 A NL 7305050A NL 180000 C NL180000 C NL 180000C
Authority
NL
Netherlands
Prior art keywords
feÿ2oÿ3
gamma
substituted
preparation
solid solution
Prior art date
Application number
NL7305050A
Other languages
Dutch (nl)
Other versions
NL7305050A (en
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/en
Application filed by Anvar filed Critical Anvar
Publication of NL7305050A publication Critical patent/NL7305050A/xx
Application granted granted Critical
Publication of NL180000C publication Critical patent/NL180000C/en

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
NL7305050A 1972-04-21 1973-04-11 PROCESS FOR THE PREPARATION OF A FINISHED POWDER FROM A SOLID SOLUTION OF GAMMA-FEŸ2OŸ3 SUBSTITUTED WITH ONE OR MORE TWO-VALUE METALS. NL180000C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7214215A FR2180575B1 (en) 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
NL7305050A NL7305050A (en) 1973-10-23
NL180000C true NL180000C (en) 1986-12-16

Family

ID=26217047

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7305050A NL180000C (en) 1972-04-21 1973-04-11 PROCESS FOR THE PREPARATION OF A FINISHED POWDER FROM A SOLID SOLUTION OF GAMMA-FEŸ2OŸ3 SUBSTITUTED WITH ONE OR MORE TWO-VALUE METALS.

Country Status (6)

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

Families Citing this family (8)

* 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 (en) * 1976-09-01 1985-12-12 Basf Ag, 6700 Ludwigshafen Process for the production of acicular, cobalt-doped magnetic iron oxide
DE2650890C2 (en) * 1976-11-06 1985-12-12 Basf Ag, 6700 Ludwigshafen Process for the production of acicular, cobalt-doped, magnetic iron oxide
DE2705967C2 (en) * 1977-02-12 1990-01-04 Basf Ag, 6700 Ludwigshafen Process for the production of acicular cobalt-containing magnetic iron oxide
DE2935444A1 (en) * 1979-09-01 1981-03-19 Basf Ag, 6700 Ludwigshafen METHOD FOR PRODUCING NEEDLE SHAPED FERRIMAGNETIC IRON OXIDE
FR2587990B1 (en) * 1985-09-30 1987-11-13 Centre Nat Rech Scient PARTICULATE MAGNETIC OXIDE COMPOSITIONS WITH LACUNAR SPINEL TYPE STRUCTURE, THEIR PREPARATION AND THEIR APPLICATION
KR102147451B1 (en) * 2017-07-21 2020-08-24 네오-나노메딕스.인크 Iron Oxide Nanoparticle doped with alkali metals or alkali earth metals capable of gigantic self-heating in the biocompatible magnetic field and Preparation Method thereof
RU2761198C1 (en) * 2021-04-16 2021-12-06 Федеральное государственное бюджетное образовательное учреждение высшего образования "Ивановский государственный химико-технологический университет" Method for producing cobalt ferrite

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
CH569676A5 (en) 1975-11-28
NL7305050A (en) 1973-10-23
DE2320182C2 (en) 1982-07-01
JPS5649856B2 (en) 1981-11-25
JPS4921695A (en) 1974-02-26
IT982802B (en) 1974-10-21
GB1432808A (en) 1976-04-22
DE2320182A1 (en) 1973-10-31

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Legal Events

Date Code Title Description
BV The patent application has lapsed
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
A85 Still pending on 85-01-01
V1 Lapsed because of non-payment of the annual fee