FR2369214A1 - Particules magnetisables, leur preparation et leur utilisation - Google Patents

Particules magnetisables, leur preparation et leur utilisation

Info

Publication number
FR2369214A1
FR2369214A1 FR7732581A FR7732581A FR2369214A1 FR 2369214 A1 FR2369214 A1 FR 2369214A1 FR 7732581 A FR7732581 A FR 7732581A FR 7732581 A FR7732581 A FR 7732581A FR 2369214 A1 FR2369214 A1 FR 2369214A1
Authority
FR
France
Prior art keywords
particles
preparation
magnetisable particles
present
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.)
Granted
Application number
FR7732581A
Other languages
English (en)
Other versions
FR2369214B1 (fr
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing 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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of FR2369214A1 publication Critical patent/FR2369214A1/fr
Application granted granted Critical
Publication of FR2369214B1 publication Critical patent/FR2369214B1/fr
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
    • G11B5/70678—Ferrites
    • G11B5/70684—Ferro-ferrioxydes
    • G11B5/70694—Non-stoechiometric ferro-ferrioxydes, e.g. berthollide
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated

Landscapes

  • Hard Magnetic Materials (AREA)
  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)
  • Compounds Of Iron (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

La présente invention est relative à des particules aciculaires de (FEO)x Fe2 O 3 . Suivant la présente invention, la valeur de x est supérieure à 1 et ne dépasse pas 1,5, et le cobalt constitue 1 % à 10 % du poids total des particules. Lorsqu'on les disperse dans un liant non magnétisable, ces particules d'hypermagnétite, recouvertes de cobalt forment des milieux d'enregistrement magnétiques d'une qualité supérieure.
FR7732581A 1976-10-29 1977-10-28 Particules magnetisables, leur preparation et leur utilisation Granted FR2369214A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/736,744 US4137342A (en) 1976-10-29 1976-10-29 Cobalt-doped acicular hyper-magnetite particles

Publications (2)

Publication Number Publication Date
FR2369214A1 true FR2369214A1 (fr) 1978-05-26
FR2369214B1 FR2369214B1 (fr) 1984-06-29

Family

ID=24961134

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7732581A Granted FR2369214A1 (fr) 1976-10-29 1977-10-28 Particules magnetisables, leur preparation et leur utilisation

Country Status (15)

Country Link
US (1) US4137342A (fr)
JP (1) JPS5852927B2 (fr)
AR (1) AR214343A1 (fr)
AT (1) AT365356B (fr)
AU (1) AU514316B2 (fr)
BE (1) BE860291A (fr)
BR (1) BR7707242A (fr)
CA (1) CA1097057A (fr)
DE (1) DE2749010C2 (fr)
FR (1) FR2369214A1 (fr)
GB (1) GB1594727A (fr)
IT (1) IT1090198B (fr)
NL (1) NL188483C (fr)
SU (1) SU921474A3 (fr)
ZA (1) ZA775470B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078950A2 (fr) * 1981-11-05 1983-05-18 BASF Aktiengesellschaft Procédé de préparation d'oxydes de fer aciculaire, ferrimagnetique
EP0097900A2 (fr) * 1982-06-30 1984-01-11 BASF Aktiengesellschaft Procédé de préparation d'oxydes de fer ferromagnétiques aciculaires
WO1996013461A1 (fr) * 1994-10-31 1996-05-09 Minnesota Mining And Manufacturing Company Procede de production d'oxyde magnetique de fer

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364988A (en) * 1978-07-31 1982-12-21 Hitachi Maxell, Ltd. Magnetic recording medium
JPS55149137A (en) * 1979-05-11 1980-11-20 Tdk Corp High performance high coercive force powder and its manufacture
JPS5626729A (en) * 1979-08-11 1981-03-14 Tdk Corp Powdered magnetic material for magnetic recording medium
US4388367A (en) * 1981-09-28 1983-06-14 Xerox Corporation Perpendicular magnetic recording medium and fabrication
EP0076142B1 (fr) * 1981-09-28 1987-09-16 Xerox Corporation Retouche de supports d'enregistrement magnétiques perpendiculaires
US4501774A (en) * 1981-10-12 1985-02-26 Ishihara Sangyo Kaisha, Ltd. Process for the production of cobalt-containing magnetic iron oxide powder
US4842759A (en) * 1983-04-25 1989-06-27 Daikin Industries, Ltd. Acicular process for producing particulate material
US5151206A (en) * 1983-04-25 1992-09-29 Daikin Industries, Ltd. Acicular iron carbide particulate material and process for producing same
JPS60143431A (ja) * 1983-12-29 1985-07-29 Alps Electric Co Ltd 垂直磁気記録媒体
US5069216A (en) * 1986-07-03 1991-12-03 Advanced Magnetics Inc. Silanized biodegradable super paramagnetic metal oxides as contrast agents for imaging the gastrointestinal tract
US5219554A (en) * 1986-07-03 1993-06-15 Advanced Magnetics, Inc. Hydrated biodegradable superparamagnetic metal oxides
US4814546A (en) * 1987-11-25 1989-03-21 Minnesota Mining And Manufacturing Company Electromagnetic radiation suppression cover
US5106437A (en) * 1987-11-25 1992-04-21 Minnesota Mining And Manufacturing Company Electromagnetic radiation suppression cover
US5932330A (en) * 1993-09-30 1999-08-03 Imation Corp. Coated magnetic recording medium, paint for coated magnetic medium and method for producing coated magnetic medium
US6030695A (en) * 1996-03-28 2000-02-29 Imation Corp. Coated magnetic recording medium, paint for coated magnetic medium and method for producing coated magnetic medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2413429A1 (de) * 1973-03-20 1974-10-03 Tdk Electronics Co Ltd Verfahren zur herstellung eines magnetischen aufzeichnungsmediums, nach diesem verfahren hergestelltes aufzeichnungsmedium und vorrichtung zur durchfuehrung des verfahrens

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5029157B1 (fr) * 1971-05-27 1975-09-20
JPS5225959B2 (fr) * 1972-01-13 1977-07-11
US3977985A (en) * 1972-02-23 1976-08-31 Tdk Electronics Company, Limited Magnetic recording medium comprising cobalt or cobalt alloy coated particles of spicular magnetite
US3932293A (en) * 1972-05-22 1976-01-13 Minnesota Mining And Manufacturing Company Metallic ferromagnetic particles for use in environmentally stable magnetic recording media
US4064292A (en) * 1972-09-01 1977-12-20 Badische Anilin- & Soda-Fabrik, Aktiengesellschaft Manufacture of cobalt-modified γ-iron(III)oxides
JPS5321118B2 (fr) * 1973-03-05 1978-06-30
US4010310A (en) * 1973-03-20 1977-03-01 Tdk Electronics Company, Limited Magnetic powder
JPS5133758A (fr) * 1974-09-17 1976-03-23 Fuji Photo Film Co Ltd
JPS608606B2 (ja) * 1975-07-02 1985-03-04 富士写真フイルム株式会社 強磁性粉末の製法
JPS5853493B2 (ja) * 1975-07-02 1983-11-29 富士写真フイルム株式会社 キヨウジセイフンマツノセイホウ

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2413429A1 (de) * 1973-03-20 1974-10-03 Tdk Electronics Co Ltd Verfahren zur herstellung eines magnetischen aufzeichnungsmediums, nach diesem verfahren hergestelltes aufzeichnungsmedium und vorrichtung zur durchfuehrung des verfahrens

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0078950A2 (fr) * 1981-11-05 1983-05-18 BASF Aktiengesellschaft Procédé de préparation d'oxydes de fer aciculaire, ferrimagnetique
EP0078950A3 (en) * 1981-11-05 1983-09-07 Basf Aktiengesellschaft Process for the preparation of acicular, ferrimagnetic iron oxides
EP0097900A2 (fr) * 1982-06-30 1984-01-11 BASF Aktiengesellschaft Procédé de préparation d'oxydes de fer ferromagnétiques aciculaires
EP0097900A3 (en) * 1982-06-30 1986-02-19 Basf Aktiengesellschaft Process for the preparation of acicular ferromagnetic iron oxides
WO1996013461A1 (fr) * 1994-10-31 1996-05-09 Minnesota Mining And Manufacturing Company Procede de production d'oxyde magnetique de fer

Also Published As

Publication number Publication date
JPS5360399A (en) 1978-05-30
DE2749010A1 (de) 1978-05-11
NL7711724A (nl) 1978-05-03
ZA775470B (en) 1978-07-26
NL188483B (nl) 1992-02-03
JPS5852927B2 (ja) 1983-11-26
AR214343A1 (es) 1979-05-31
BR7707242A (pt) 1978-08-08
CA1097057A (fr) 1981-03-10
AU514316B2 (en) 1981-02-05
US4137342A (en) 1979-01-30
FR2369214B1 (fr) 1984-06-29
SU921474A3 (ru) 1982-04-15
NL188483C (nl) 1992-07-01
BE860291A (fr) 1978-04-28
GB1594727A (en) 1981-08-05
ATA771777A (de) 1981-05-15
AT365356B (de) 1982-01-11
IT1090198B (it) 1985-06-18
AU2969177A (en) 1979-04-26
DE2749010C2 (de) 1983-01-20

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