JPS5413997A - Magnetic recording medium and its manufacture - Google Patents

Magnetic recording medium and its manufacture

Info

Publication number
JPS5413997A
JPS5413997A JP7964577A JP7964577A JPS5413997A JP S5413997 A JPS5413997 A JP S5413997A JP 7964577 A JP7964577 A JP 7964577A JP 7964577 A JP7964577 A JP 7964577A JP S5413997 A JPS5413997 A JP S5413997A
Authority
JP
Japan
Prior art keywords
manufacture
recording medium
magnetic recording
magnetic
anglar
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.)
Granted
Application number
JP7964577A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6114642B2 (nl
Inventor
Hideo Tamura
Tokio Nakamura
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP7964577A priority Critical patent/JPS5413997A/ja
Priority to CA306,504A priority patent/CA1103069A/en
Priority to FR7819812A priority patent/FR2397049A1/fr
Priority to GB7828792A priority patent/GB2001942B/en
Priority to NL7807250A priority patent/NL7807250A/nl
Priority to DE19782829344 priority patent/DE2829344A1/de
Publication of JPS5413997A publication Critical patent/JPS5413997A/ja
Publication of JPS6114642B2 publication Critical patent/JPS6114642B2/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
    • G11B5/712—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 surface treatment or coating of magnetic particles
    • 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)
  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)
JP7964577A 1977-07-04 1977-07-04 Magnetic recording medium and its manufacture Granted JPS5413997A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP7964577A JPS5413997A (en) 1977-07-04 1977-07-04 Magnetic recording medium and its manufacture
CA306,504A CA1103069A (en) 1977-07-04 1978-06-29 Method of making magnetic powders
FR7819812A FR2397049A1 (fr) 1977-07-04 1978-07-03 Procede de fabrication de poudres magnetiques et poudres et supports munis de telles poudres ainsi obtenues
GB7828792A GB2001942B (en) 1977-07-04 1978-07-04 Methods of making magnetic powders and magnetic recording media including magnetic powders so made
NL7807250A NL7807250A (nl) 1977-07-04 1978-07-04 Werkwijze voor de bereiding van magnetische poeders.
DE19782829344 DE2829344A1 (de) 1977-07-04 1978-07-04 Verfahren zur herstellung von magnetischen pulvern

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7964577A JPS5413997A (en) 1977-07-04 1977-07-04 Magnetic recording medium and its manufacture

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP60233098A Division JPS6187302A (ja) 1985-10-18 1985-10-18 磁気記録媒体の製法

Publications (2)

Publication Number Publication Date
JPS5413997A true JPS5413997A (en) 1979-02-01
JPS6114642B2 JPS6114642B2 (nl) 1986-04-19

Family

ID=13695840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7964577A Granted JPS5413997A (en) 1977-07-04 1977-07-04 Magnetic recording medium and its manufacture

Country Status (5)

Country Link
JP (1) JPS5413997A (nl)
DE (1) DE2829344A1 (nl)
FR (1) FR2397049A1 (nl)
GB (1) GB2001942B (nl)
NL (1) NL7807250A (nl)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2903593C3 (de) * 1979-01-31 1982-05-06 Bayer Ag, 5090 Leverkusen Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung
DE2905351A1 (de) * 1979-02-13 1980-08-21 Basf Ag Verfahren zur herstellung von nadelfoermigem kobalthaltigem, magnetischem eisenoxid
DE2905352A1 (de) * 1979-02-13 1980-08-21 Basf Ag Verfahren zur herstellung von nadelfoermigem kobalthaltigem magnetischem eisenoxid
EP0099259A1 (en) * 1982-07-09 1984-01-25 Konica Corporation Process for producing surface-treated ferromagnetic particles
DE3631194A1 (de) * 1986-09-13 1988-03-24 Bayer Ag Magnetische eisenoxidpigmente sowie verfahren zu ihrer herstellung
DE3631193A1 (de) * 1986-09-13 1988-03-24 Bayer Ag Magnetische eisenoxidpigmente und verfahren zu ihrer herstellung
CN103694746B (zh) * 2013-12-27 2015-11-18 广东维诺珠光颜料有限公司 一种多功能型导磁合成云母珠光颜料的制备方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4969588A (nl) * 1972-09-01 1974-07-05
DE2639250A1 (de) * 1976-09-01 1978-03-09 Basf Ag Nadelfoermiges kobaltdotiertes magnetisches eisenoxid und verfahren zu seiner herstellung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4810994B1 (nl) * 1969-07-26 1973-04-09
JPS5321119B2 (nl) * 1973-03-20 1978-06-30
DE2705967C2 (de) * 1977-02-12 1990-01-04 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von nadelförmigem kobalthaltigem magnetischem Eisenoxid

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4969588A (nl) * 1972-09-01 1974-07-05
DE2639250A1 (de) * 1976-09-01 1978-03-09 Basf Ag Nadelfoermiges kobaltdotiertes magnetisches eisenoxid und verfahren zu seiner herstellung
JPS5330497A (en) * 1976-09-01 1978-03-22 Basf Ag Cobalttdoped acicular magnetic iron oxide and process for preparing same

Also Published As

Publication number Publication date
JPS6114642B2 (nl) 1986-04-19
DE2829344A1 (de) 1979-01-25
FR2397049B1 (nl) 1982-04-02
NL7807250A (nl) 1979-01-08
FR2397049A1 (fr) 1979-02-02
GB2001942A (en) 1979-02-14
DE2829344C2 (nl) 1989-03-02
GB2001942B (en) 1982-02-03

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