JPS5814047B2 - 磁気記録材料の製造方法 - Google Patents

磁気記録材料の製造方法

Info

Publication number
JPS5814047B2
JPS5814047B2 JP48102269A JP10226973A JPS5814047B2 JP S5814047 B2 JPS5814047 B2 JP S5814047B2 JP 48102269 A JP48102269 A JP 48102269A JP 10226973 A JP10226973 A JP 10226973A JP S5814047 B2 JPS5814047 B2 JP S5814047B2
Authority
JP
Japan
Prior art keywords
ferric
doped
magnetic
monoxide
cobalt
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
JP48102269A
Other languages
English (en)
Japanese (ja)
Other versions
JPS4969104A (xx
Inventor
ジヤン パンギユア ベルナ−ル
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of JPS4969104A publication Critical patent/JPS4969104A/ja
Publication of JPS5814047B2 publication Critical patent/JPS5814047B2/ja
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
    • G11B5/70678—Ferrites
    • 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
    • G11B5/70678—Ferrites
    • G11B5/70684—Ferro-ferrioxydes
    • 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
    • G11B5/70678—Ferrites
    • G11B5/70684—Ferro-ferrioxydes
    • G11B5/70689—Magnetite

Landscapes

  • Hard Magnetic Materials (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Compounds Of Iron (AREA)
JP48102269A 1972-09-13 1973-09-12 磁気記録材料の製造方法 Expired JPS5814047B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7232367A FR2199155B1 (xx) 1972-09-13 1972-09-13
FR7232367 1972-09-13

Publications (2)

Publication Number Publication Date
JPS4969104A JPS4969104A (xx) 1974-07-04
JPS5814047B2 true JPS5814047B2 (ja) 1983-03-17

Family

ID=9104193

Family Applications (1)

Application Number Title Priority Date Filing Date
JP48102269A Expired JPS5814047B2 (ja) 1972-09-13 1973-09-12 磁気記録材料の製造方法

Country Status (9)

Country Link
JP (1) JPS5814047B2 (xx)
BE (1) BE804829A (xx)
CH (1) CH581075A5 (xx)
DD (1) DD105920A5 (xx)
DE (1) DE2343562C3 (xx)
FR (1) FR2199155B1 (xx)
GB (1) GB1436140A (xx)
IT (1) IT995315B (xx)
NL (1) NL7312614A (xx)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2801452C2 (de) * 1978-01-13 1985-03-28 Agfa-Gevaert Ag, 5090 Leverkusen Magnetisches Aufzeichnungsmaterial
US4778719A (en) * 1986-08-25 1988-10-18 Eastman Kodak Company Particulate magnetic recording media and method of manufacture thereof

Also Published As

Publication number Publication date
BE804829A (fr) 1974-03-13
GB1436140A (en) 1976-05-19
DE2343562B2 (de) 1978-02-02
JPS4969104A (xx) 1974-07-04
NL7312614A (xx) 1974-03-15
FR2199155A1 (xx) 1974-04-05
DD105920A5 (xx) 1974-05-12
FR2199155B1 (xx) 1978-04-28
CH581075A5 (xx) 1976-10-29
IT995315B (it) 1975-11-10
DE2343562C3 (de) 1978-09-28
DE2343562A1 (de) 1974-03-28

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Legal Events

Date Code Title Description
A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 19811027