BE750031A - Oxyde ferrique gamma dope au cobalt - Google Patents
Oxyde ferrique gamma dope au 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 (fr) | 1970-10-16 |
Family
ID=25236749
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE750031D BE750031A (fr) | 1969-05-07 | 1970-05-06 | Oxyde ferrique gamma dope au cobalt |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE750031A (xx) |
DE (1) | DE2022013C2 (xx) |
FR (1) | FR2047369A5 (xx) |
GB (1) | GB1268458A (xx) |
NL (1) | NL7004295A (xx) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2243231C2 (de) * | 1972-09-01 | 1982-01-28 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von Cobalt-dotiertem γ-Eisen(III)oxid |
DE2639250C2 (de) * | 1976-09-01 | 1985-12-12 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von nadelförmigem, kobaltdotiertem magnetischem Eisenoxid |
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 (de) * | 1979-01-31 | 1982-05-06 | Bayer Ag, 5090 Leverkusen | Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung |
DE2905352A1 (de) | 1979-02-13 | 1980-08-21 | Basf Ag | Verfahren zur herstellung von nadelfoermigem kobalthaltigem magnetischem eisenoxid |
DE2905351A1 (de) | 1979-02-13 | 1980-08-21 | Basf Ag | Verfahren zur herstellung von nadelfoermigem kobalthaltigem, magnetischem eisenoxid |
DE2935444A1 (de) * | 1979-09-01 | 1981-03-19 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung von nadelfoermigen ferrimagnetischem eisenoxid |
NL8204778A (nl) * | 1981-12-09 | 1983-07-01 | Japan Metals & Chem Co Ltd | Werkwijze voor het bereiden van ferromagnetische oxyden. |
JPS60137002A (ja) * | 1983-12-26 | 1985-07-20 | Toda Kogyo Corp | 磁気記録用板状Baフエライト微粒子粉末の製造法 |
CN113106484B (zh) * | 2021-04-07 | 2022-07-01 | 西南大学 | 一种基于α型氧化铁蠕虫状纳米结构阵列的光阳极的水热制备方法及其产品和应用 |
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 (de) * | 1953-12-03 | 1955-12-15 | Basf Ag | Verfahren zur Herstellung von magnetischen Eisenoxyden |
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/de not_active Expired
- 1970-05-06 BE BE750031D patent/BE750031A/xx not_active IP Right Cessation
- 1970-05-06 FR FR7016520A patent/FR2047369A5/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1268458A (en) | 1972-03-29 |
DE2022013A1 (de) | 1970-11-19 |
NL7004295A (xx) | 1970-11-10 |
DE2022013C2 (de) | 1982-11-25 |
FR2047369A5 (xx) | 1971-03-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE20 | Patent expired |
Owner name: AMPEX CORP. Effective date: 19900506 |