FR2047369A5 - - Google Patents

Info

Publication number
FR2047369A5
FR2047369A5 FR7016520A FR7016520A FR2047369A5 FR 2047369 A5 FR2047369 A5 FR 2047369A5 FR 7016520 A FR7016520 A FR 7016520A FR 7016520 A FR7016520 A FR 7016520A FR 2047369 A5 FR2047369 A5 FR 2047369A5
Authority
FR
France
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
FR7016520A
Other languages
French (fr)
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
Application granted granted Critical
Publication of FR2047369A5 publication Critical patent/FR2047369A5/fr
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
FR7016520A 1969-05-07 1970-05-06 Expired FR2047369A5 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
FR2047369A5 true FR2047369A5 (enrdf_load_stackoverflow) 1971-03-12

Family

ID=25236749

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7016520A Expired FR2047369A5 (enrdf_load_stackoverflow) 1969-05-07 1970-05-06

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)

Families Citing this family (11)

* 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
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
DE3245635A1 (de) * 1981-12-09 1983-06-16 Japan Metals & Chemicals Co., Ltd., Tokyo Verfahren zur herstellung eines ferromagnetischen oxids
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)

* 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

Also Published As

Publication number Publication date
NL7004295A (enrdf_load_stackoverflow) 1970-11-10
BE750031A (fr) 1970-10-16
DE2022013C2 (de) 1982-11-25
GB1268458A (en) 1972-03-29
DE2022013A1 (de) 1970-11-19

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