JPH0230563B2 - - Google Patents

Info

Publication number
JPH0230563B2
JPH0230563B2 JP57207048A JP20704882A JPH0230563B2 JP H0230563 B2 JPH0230563 B2 JP H0230563B2 JP 57207048 A JP57207048 A JP 57207048A JP 20704882 A JP20704882 A JP 20704882A JP H0230563 B2 JPH0230563 B2 JP H0230563B2
Authority
JP
Japan
Prior art keywords
cobalt
magnetic
iron oxide
coating
metal hydroxide
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 - Lifetime
Application number
JP57207048A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5998503A (ja
Inventor
Kazuo Nakada
Seigo Maruo
Kyoshi Asano
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.)
Ishihara Sangyo Kaisha Ltd
Original Assignee
Ishihara Sangyo Kaisha Ltd
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 Ishihara Sangyo Kaisha Ltd filed Critical Ishihara Sangyo Kaisha Ltd
Priority to JP57207048A priority Critical patent/JPS5998503A/ja
Publication of JPS5998503A publication Critical patent/JPS5998503A/ja
Publication of JPH0230563B2 publication Critical patent/JPH0230563B2/ja
Granted 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

  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Paints Or Removers (AREA)
JP57207048A 1982-11-26 1982-11-26 コバルト含有磁性酸化鉄 Granted JPS5998503A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57207048A JPS5998503A (ja) 1982-11-26 1982-11-26 コバルト含有磁性酸化鉄

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57207048A JPS5998503A (ja) 1982-11-26 1982-11-26 コバルト含有磁性酸化鉄

Publications (2)

Publication Number Publication Date
JPS5998503A JPS5998503A (ja) 1984-06-06
JPH0230563B2 true JPH0230563B2 (en(2012)) 1990-07-06

Family

ID=16533337

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57207048A Granted JPS5998503A (ja) 1982-11-26 1982-11-26 コバルト含有磁性酸化鉄

Country Status (1)

Country Link
JP (1) JPS5998503A (en(2012))

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01184801A (ja) * 1988-01-13 1989-07-24 Showa Denko Kk 磁気記録用磁性酸化鉄粉の製造法
JP3427871B2 (ja) * 1996-06-24 2003-07-22 戸田工業株式会社 コバルト被着型針状磁性酸化鉄粒子粉末

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5976402A (ja) * 1982-10-25 1984-05-01 Toda Kogyo Corp 磁気記録媒体用磁性酸化鉄粒子粉末の製造法

Also Published As

Publication number Publication date
JPS5998503A (ja) 1984-06-06

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