DE3161480D1 - Method of preparation of magnetic particles with a high coercivity, consisting of cobalt-doped ferrimagnetic iron oxide - Google Patents

Method of preparation of magnetic particles with a high coercivity, consisting of cobalt-doped ferrimagnetic iron oxide

Info

Publication number
DE3161480D1
DE3161480D1 DE8181400603T DE3161480T DE3161480D1 DE 3161480 D1 DE3161480 D1 DE 3161480D1 DE 8181400603 T DE8181400603 T DE 8181400603T DE 3161480 T DE3161480 T DE 3161480T DE 3161480 D1 DE3161480 D1 DE 3161480D1
Authority
DE
Germany
Prior art keywords
iron oxide
cobalt
doped
preparation
magnetic particles
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
DE8181400603T
Other languages
English (en)
Inventor
Alex Chamard
Patrick Dougier
Jean-Bruno Monteil
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.)
Rhone Poulenc Industries SA
Original Assignee
Rhone Poulenc Industries SA
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 Rhone Poulenc Industries SA filed Critical Rhone Poulenc Industries SA
Application granted granted Critical
Publication of DE3161480D1 publication Critical patent/DE3161480D1/de
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

Landscapes

  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)
DE8181400603T 1980-04-28 1981-04-15 Method of preparation of magnetic particles with a high coercivity, consisting of cobalt-doped ferrimagnetic iron oxide Expired DE3161480D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8009498A FR2481256A1 (fr) 1980-04-28 1980-04-28 Particules magnetiques de coercivite elevee a base d'oxydes de fer ferrimagnetique dopees au cobalt, leurs procedes de preparation et leurs applications

Publications (1)

Publication Number Publication Date
DE3161480D1 true DE3161480D1 (en) 1983-12-29

Family

ID=9241412

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8181400603T Expired DE3161480D1 (en) 1980-04-28 1981-04-15 Method of preparation of magnetic particles with a high coercivity, consisting of cobalt-doped ferrimagnetic iron oxide

Country Status (6)

Country Link
US (1) US4371567A (de)
EP (1) EP0039273B1 (de)
JP (1) JPS5915483B2 (de)
AT (1) ATE5446T1 (de)
DE (1) DE3161480D1 (de)
FR (1) FR2481256A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6025026A (ja) * 1983-07-20 1985-02-07 Nec Corp 磁気デイスク媒体
JPS60184576A (ja) * 1984-03-01 1985-09-20 Daikin Ind Ltd 磁性塗料組成物
US5202043A (en) * 1985-01-09 1993-04-13 Bayer Aktiengesellschaft Process for the preparation of isometric magnetic iron oxide
DE3631193A1 (de) * 1986-09-13 1988-03-24 Bayer Ag Magnetische eisenoxidpigmente und verfahren zu ihrer herstellung
DE3631194A1 (de) * 1986-09-13 1988-03-24 Bayer Ag Magnetische eisenoxidpigmente sowie verfahren zu ihrer herstellung
JPS63305976A (ja) * 1987-06-05 1988-12-13 有限会社　和金工業 木の葉洗浄装置
FR2714205A1 (fr) * 1993-12-17 1995-06-23 Atg Sa Matériau composite pour l'enregistrement magnéto-optique, sa préparation et son utilisation.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2074706A7 (en) * 1970-01-20 1971-10-08 Geopetrole Removal of iron contamination - and prepn of magnetic oxides via iron glycerol complex
JPS5321119B2 (de) * 1973-03-20 1978-06-30
DE2242500A1 (de) * 1972-08-30 1974-03-07 Basf Ag Verfahren zur herstellung von nadelfoermigen metall- und kohlenstoffhaltigen eisenoxiden
JPS6044254B2 (ja) * 1977-03-16 1985-10-02 富士写真フイルム株式会社 強磁性粉末の製造方法
NL7902902A (nl) * 1978-04-17 1979-10-19 Montedison Spa Werkwijze ter bereiding van magnetische poeders op basis van gamma-fe203, de aldus verkregen poeders en magnetische banden, die deze poeders bevatten.
DE2905351A1 (de) * 1979-02-13 1980-08-21 Basf Ag Verfahren zur herstellung von nadelfoermigem kobalthaltigem, magnetischem eisenoxid

Also Published As

Publication number Publication date
FR2481256B1 (de) 1984-09-21
EP0039273B1 (de) 1983-11-23
ATE5446T1 (de) 1983-12-15
JPS56167301A (en) 1981-12-23
US4371567A (en) 1983-02-01
FR2481256A1 (fr) 1981-10-30
EP0039273A1 (de) 1981-11-04
JPS5915483B2 (ja) 1984-04-10

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Legal Events

Date Code Title Description
8339 Ceased/non-payment of the annual fee