JPH0425686B2 - - Google Patents

Info

Publication number
JPH0425686B2
JPH0425686B2 JP58012450A JP1245083A JPH0425686B2 JP H0425686 B2 JPH0425686 B2 JP H0425686B2 JP 58012450 A JP58012450 A JP 58012450A JP 1245083 A JP1245083 A JP 1245083A JP H0425686 B2 JPH0425686 B2 JP H0425686B2
Authority
JP
Japan
Prior art keywords
cobalt
iron oxide
compound
oxide powder
magnetic iron
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
JP58012450A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59138312A (ja
Inventor
Ichiro Honma
Masaharu Hirai
Masatoshi Amano
Nobusuke Takumi
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 JP58012450A priority Critical patent/JPS59138312A/ja
Publication of JPS59138312A publication Critical patent/JPS59138312A/ja
Publication of JPH0425686B2 publication Critical patent/JPH0425686B2/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

  • Inorganic Compounds Of Heavy Metals (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)
JP58012450A 1983-01-28 1983-01-28 コバルト含有磁性酸化鉄粉末の製造方法 Granted JPS59138312A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58012450A JPS59138312A (ja) 1983-01-28 1983-01-28 コバルト含有磁性酸化鉄粉末の製造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58012450A JPS59138312A (ja) 1983-01-28 1983-01-28 コバルト含有磁性酸化鉄粉末の製造方法

Publications (2)

Publication Number Publication Date
JPS59138312A JPS59138312A (ja) 1984-08-08
JPH0425686B2 true JPH0425686B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1992-05-01

Family

ID=11805670

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58012450A Granted JPS59138312A (ja) 1983-01-28 1983-01-28 コバルト含有磁性酸化鉄粉末の製造方法

Country Status (1)

Country Link
JP (1) JPS59138312A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS638223A (ja) * 1986-06-27 1988-01-14 Showa Denko Kk 磁気記録用強磁性粉末の製造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5648444B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1973-11-30 1981-11-16
JPS54106895A (en) * 1978-02-08 1979-08-22 Fuji Photo Film Co Ltd Ferromagnetic powder
DE2916403A1 (de) * 1979-04-23 1980-11-06 Basf Ag Nadelfoermiges magnetisches eisenoxid und verfahren zu seiner herstellung
JPS56104721A (en) * 1980-01-22 1981-08-20 Tdk Corp Preparation of magnetic powder

Also Published As

Publication number Publication date
JPS59138312A (ja) 1984-08-08

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