GB1268458A - Improvements in and relating to the preparation of cobalt doped gamma ferric oxide - Google Patents

Improvements in and relating to the preparation of cobalt doped gamma ferric oxide

Info

Publication number
GB1268458A
GB1268458A GB1443470A GB1443470A GB1268458A GB 1268458 A GB1268458 A GB 1268458A GB 1443470 A GB1443470 A GB 1443470A GB 1443470 A GB1443470 A GB 1443470A GB 1268458 A GB1268458 A GB 1268458A
Authority
GB
United Kingdom
Prior art keywords
cobalt
mixture
heating
alpha
compound
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB1443470A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ampex Corp
Original Assignee
Ampex Corp
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 by Ampex Corp filed Critical Ampex Corp
Publication of GB1268458A publication Critical patent/GB1268458A/en
Expired legal-status Critical Current

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

Landscapes

  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Paints Or Removers (AREA)
GB1443470A 1969-05-07 1970-03-25 Improvements in and relating to the preparation of cobalt doped gamma ferric oxide Expired GB1268458A (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
GB1268458A true GB1268458A (en) 1972-03-29

Family

ID=25236749

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1443470A Expired GB1268458A (en) 1969-05-07 1970-03-25 Improvements in and relating to the preparation of cobalt doped gamma ferric oxide

Country Status (5)

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

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4274865A (en) 1978-03-16 1981-06-23 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4287233A (en) 1979-02-13 1981-09-01 Basf Aktiengesellschaft Manufacture of acicular cobalt-containing magnetic iron oxide
US4296149A (en) 1979-02-13 1981-10-20 Basf Aktiengesellschaft Manufacture of acicular cobalt-containing magnetic iron oxide
US4306921A (en) 1978-03-16 1981-12-22 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
DE3245635A1 (de) * 1981-12-09 1983-06-16 Japan Metals & Chemicals Co., Ltd., Tokyo Verfahren zur herstellung eines ferromagnetischen oxids
CN113106484A (zh) * 2021-04-07 2021-07-13 西南大学 一种基于α型氧化铁蠕虫状纳米结构阵列的新型光阳极的水热制备方法及其产品和应用

Families Citing this family (5)

* Cited by examiner, † Cited by third party
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
DE2903593C3 (de) * 1979-01-31 1982-05-06 Bayer Ag, 5090 Leverkusen Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung
DE2935444A1 (de) * 1979-09-01 1981-03-19 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von nadelfoermigen ferrimagnetischem eisenoxid
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

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 (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

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4274865A (en) 1978-03-16 1981-06-23 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4306921A (en) 1978-03-16 1981-12-22 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4384892A (en) 1978-03-16 1983-05-24 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4404024A (en) 1978-03-16 1983-09-13 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4447264A (en) * 1978-03-16 1984-05-08 Kanto Denka Kogyo Co., Ltd. Production of magnetic powder
US4287233A (en) 1979-02-13 1981-09-01 Basf Aktiengesellschaft Manufacture of acicular cobalt-containing magnetic iron oxide
US4296149A (en) 1979-02-13 1981-10-20 Basf Aktiengesellschaft Manufacture of acicular cobalt-containing magnetic iron oxide
DE3245635A1 (de) * 1981-12-09 1983-06-16 Japan Metals & Chemicals Co., Ltd., Tokyo Verfahren zur herstellung eines ferromagnetischen oxids
CN113106484A (zh) * 2021-04-07 2021-07-13 西南大学 一种基于α型氧化铁蠕虫状纳米结构阵列的新型光阳极的水热制备方法及其产品和应用

Also Published As

Publication number Publication date
NL7004295A (enrdf_load_stackoverflow) 1970-11-10
BE750031A (fr) 1970-10-16
DE2022013C2 (de) 1982-11-25
FR2047369A5 (enrdf_load_stackoverflow) 1971-03-12
DE2022013A1 (de) 1970-11-19

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