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NL7004295A - - Google Patents

Info

Publication number
NL7004295A
NL7004295A NL7004295A NL7004295A NL7004295A NL 7004295 A NL7004295 A NL 7004295A NL 7004295 A NL7004295 A NL 7004295A NL 7004295 A NL7004295 A NL 7004295A NL 7004295 A NL7004295 A NL 7004295A
Authority
NL
Netherlands
Application number
NL7004295A
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 filed Critical
Publication of NL7004295A publication Critical patent/NL7004295A/xx

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
NL7004295A 1969-05-07 1970-03-25 NL7004295A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US82270969A 1969-05-07 1969-05-07

Publications (1)

Publication Number Publication Date
NL7004295A true NL7004295A (en) 1970-11-10

Family

ID=25236749

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7004295A NL7004295A (en) 1969-05-07 1970-03-25

Country Status (5)

Country Link
BE (1) BE750031A (en)
DE (1) DE2022013C2 (en)
FR (1) FR2047369A5 (en)
GB (1) GB1268458A (en)
NL (1) NL7004295A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2243231C2 (en) * 1972-09-01 1982-01-28 Basf Ag, 6700 Ludwigshafen Process for the preparation of cobalt-doped γ-iron (III) oxide
DE2639250C2 (en) * 1976-09-01 1985-12-12 Basf Ag, 6700 Ludwigshafen Process for the production of acicular, cobalt-doped magnetic iron oxide
JPS54122664A (en) 1978-03-16 1979-09-22 Kanto Denka Kogyo Kk Production of magnetic powder for magnetic recording based on iron
JPS54122663A (en) 1978-03-16 1979-09-22 Kanto Denka Kogyo Kk Production of magnetic powder for magnetic recording based on iron
DE2903593C3 (en) * 1979-01-31 1982-05-06 Bayer Ag, 5090 Leverkusen Cobalt-doped ferrimagnetic iron oxides and processes for their production
DE2905352A1 (en) 1979-02-13 1980-08-21 Basf Ag METHOD FOR PRODUCING NEEDLE-SHAPED COBAL-CONTAINING MAGNETIC IRON OXIDE
DE2905351A1 (en) 1979-02-13 1980-08-21 Basf Ag METHOD FOR PRODUCING NEEDLE-SHAPED COBAL-CONTAINING, MAGNETIC IRON OXIDE
DE2935444A1 (en) * 1979-09-01 1981-03-19 Basf Ag, 6700 Ludwigshafen METHOD FOR PRODUCING NEEDLE SHAPED FERRIMAGNETIC IRON OXIDE
NL8204778A (en) * 1981-12-09 1983-07-01 Japan Metals & Chem Co Ltd METHOD FOR PREPARING FERROMAGNETIC OXIDES
JPS60137002A (en) * 1983-12-26 1985-07-20 Toda Kogyo Corp Manufacture of tabular ba ferrite fine particle powder for magnetic recording
CN113106484B (en) * 2021-04-07 2022-07-01 西南大学 Hydrothermal preparation method of photo-anode based on alpha-type iron oxide vermicular nano-structure array, product and application thereof

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB721630A (en) * 1951-08-29 1955-01-12 Anorgana Gmbh Method for the production of ª†-fe o of improved magnetic properties
GB719283A (en) * 1951-09-20 1954-12-01 Philips Electrical Ind Ltd Improvements in or relating to a method of producing finely divided magnetic iron oxide
DE936392C (en) * 1953-12-03 1955-12-15 Basf Ag Process for the production of magnetic iron oxides
US3117933A (en) * 1959-06-12 1964-01-14 Bayer Ag Process for the production of needleshaped, cobalt-containing gamma-ferric oxide crystalline particles
US3278440A (en) * 1960-11-22 1966-10-11 William J Schuele Shaped fine particle ferrites and method for their preparation

Also Published As

Publication number Publication date
DE2022013A1 (en) 1970-11-19
BE750031A (en) 1970-10-16
DE2022013C2 (en) 1982-11-25
FR2047369A5 (en) 1971-03-12
GB1268458A (en) 1972-03-29

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