BE750031A - GAMMA FERRIC OXIDE DOPED WITH COBALT - Google Patents
GAMMA FERRIC OXIDE DOPED WITH COBALTInfo
- Publication number
- BE750031A BE750031A BE750031DA BE750031A BE 750031 A BE750031 A BE 750031A BE 750031D A BE750031D A BE 750031DA BE 750031 A BE750031 A BE 750031A
- Authority
- BE
- Belgium
- Prior art keywords
- cobalt
- ferric oxide
- oxide doped
- gamma ferric
- gamma
- Prior art date
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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US82270969A | 1969-05-07 | 1969-05-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE750031A true BE750031A (en) | 1970-10-16 |
Family
ID=25236749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE750031D BE750031A (en) | 1969-05-07 | 1970-05-06 | GAMMA FERRIC OXIDE DOPED WITH COBALT |
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)
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 |
JPS54122663A (en) | 1978-03-16 | 1979-09-22 | Kanto Denka Kogyo Kk | Production of magnetic powder for magnetic recording based on iron |
JPS54122664A (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 |
DE2905351A1 (en) | 1979-02-13 | 1980-08-21 | Basf Ag | METHOD FOR PRODUCING NEEDLE-SHAPED COBAL-CONTAINING, MAGNETIC IRON OXIDE |
DE2905352A1 (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)
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 |
-
1970
- 1970-03-25 NL NL7004295A patent/NL7004295A/xx unknown
- 1970-03-25 GB GB1443470A patent/GB1268458A/en not_active Expired
- 1970-05-05 DE DE19702022013 patent/DE2022013C2/en not_active Expired
- 1970-05-06 FR FR7016520A patent/FR2047369A5/fr not_active Expired
- 1970-05-06 BE BE750031D patent/BE750031A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
GB1268458A (en) | 1972-03-29 |
FR2047369A5 (en) | 1971-03-12 |
DE2022013C2 (en) | 1982-11-25 |
NL7004295A (en) | 1970-11-10 |
DE2022013A1 (en) | 1970-11-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE20 | Patent expired |
Owner name: AMPEX CORP. Effective date: 19900506 |