JPS5852927B2 - コバルトド−プした針状過マグネタイト粒子 - Google Patents

コバルトド−プした針状過マグネタイト粒子

Info

Publication number
JPS5852927B2
JPS5852927B2 JP52129579A JP12957977A JPS5852927B2 JP S5852927 B2 JPS5852927 B2 JP S5852927B2 JP 52129579 A JP52129579 A JP 52129579A JP 12957977 A JP12957977 A JP 12957977A JP S5852927 B2 JPS5852927 B2 JP S5852927B2
Authority
JP
Japan
Prior art keywords
particles
cobalt
acicular
tape
item
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
JP52129579A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5360399A (en
Inventor
トーマス・マーク・カンテン
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 JPS5360399A publication Critical patent/JPS5360399A/ja
Publication of JPS5852927B2 publication Critical patent/JPS5852927B2/ja
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
    • 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)
JP52129579A 1976-10-29 1977-10-28 コバルトド−プした針状過マグネタイト粒子 Expired JPS5852927B2 (ja)

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
JPS5360399A JPS5360399A (en) 1978-05-30
JPS5852927B2 true JPS5852927B2 (ja) 1983-11-26

Family

ID=24961134

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52129579A Expired JPS5852927B2 (ja) 1976-10-29 1977-10-28 コバルトド−プした針状過マグネタイト粒子

Country Status (15)

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

Families Citing this family (18)

* 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
DE3277337D1 (en) * 1981-09-28 1987-10-22 Xerox Corp Post treatment of perpendicular magnetic recording media
US4501774A (en) * 1981-10-12 1985-02-26 Ishihara Sangyo Kaisha, Ltd. Process for the production of cobalt-containing magnetic iron oxide powder
DE3143870A1 (de) * 1981-11-05 1983-05-11 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von nadelfoermigen, ferrimagnetischen eisenoxiden
DE3224325A1 (de) * 1982-06-30 1984-01-05 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von nadelfoermigen, ferrimagnetischen eisenoxiden
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
US5106437A (en) * 1987-11-25 1992-04-21 Minnesota Mining And Manufacturing Company Electromagnetic radiation suppression cover
US4814546A (en) * 1987-11-25 1989-03-21 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
WO1996013461A1 (en) * 1994-10-31 1996-05-09 Minnesota Mining And Manufacturing Company Method of producing magnetic iron oxide
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

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3770500A (en) 1969-09-16 1973-11-06 Tdk Electronics Co Ltd Magnetic materials and method of making same
JPS5029157B1 (Direct) * 1971-05-27 1975-09-20
JPS5225959B2 (Direct) * 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 (Direct) * 1973-03-05 1978-06-30
US4010310A (en) * 1973-03-20 1977-03-01 Tdk Electronics Company, Limited Magnetic powder
JPS5242363B2 (Direct) * 1973-03-20 1977-10-24
JPS5133758A (Direct) * 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

Also Published As

Publication number Publication date
IT1090198B (it) 1985-06-18
BE860291A (fr) 1978-04-28
SU921474A3 (ru) 1982-04-15
US4137342A (en) 1979-01-30
BR7707242A (pt) 1978-08-08
AU2969177A (en) 1979-04-26
NL188483C (nl) 1992-07-01
AR214343A1 (es) 1979-05-31
DE2749010A1 (de) 1978-05-11
NL7711724A (nl) 1978-05-03
NL188483B (nl) 1992-02-03
FR2369214A1 (fr) 1978-05-26
JPS5360399A (en) 1978-05-30
FR2369214B1 (Direct) 1984-06-29
AT365356B (de) 1982-01-11
CA1097057A (en) 1981-03-10
ZA775470B (en) 1978-07-26
DE2749010C2 (de) 1983-01-20
ATA771777A (de) 1981-05-15
AU514316B2 (en) 1981-02-05
GB1594727A (en) 1981-08-05

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