ATA771777A - Nadelfoermige teilchen fuer magnetische aufzeichnungsmedien - Google Patents

Nadelfoermige teilchen fuer magnetische aufzeichnungsmedien

Info

Publication number
ATA771777A
ATA771777A AT0771777A AT771777A ATA771777A AT A771777 A ATA771777 A AT A771777A AT 0771777 A AT0771777 A AT 0771777A AT 771777 A AT771777 A AT 771777A AT A771777 A ATA771777 A AT A771777A
Authority
AT
Austria
Prior art keywords
magnetic recording
recording media
shaped particles
needle shaped
needle
Prior art date
Application number
AT0771777A
Other languages
English (en)
Other versions
AT365356B (de
Original Assignee
Minnesota Mining & Mfg
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 & Mfg filed Critical Minnesota Mining & Mfg
Priority to AT371680A priority Critical patent/AT367226B/de
Publication of ATA771777A publication Critical patent/ATA771777A/de
Application granted granted Critical
Publication of AT365356B publication Critical patent/AT365356B/de

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
AT0771777A 1976-10-29 1977-10-28 Nadelfoermige teilchen fuer magnetische aufzeichnungsmedien AT365356B (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT371680A AT367226B (de) 1976-10-29 1980-07-17 Magnetischer aufzeichnungstraeger

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
ATA771777A true ATA771777A (de) 1981-05-15
AT365356B AT365356B (de) 1982-01-11

Family

ID=24961134

Family Applications (1)

Application Number Title Priority Date Filing Date
AT0771777A AT365356B (de) 1976-10-29 1977-10-28 Nadelfoermige teilchen fuer magnetische aufzeichnungsmedien

Country Status (15)

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

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
EP0076142B1 (de) * 1981-09-28 1987-09-16 Xerox Corporation Nachbehandlung von senkrecht magnetisierbarem Aufzeichnungsträger
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
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
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 (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5029157B1 (de) * 1971-05-27 1975-09-20
JPS5225959B2 (de) * 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 (de) * 1973-03-05 1978-06-30
US4010310A (en) * 1973-03-20 1977-03-01 Tdk Electronics Company, Limited Magnetic powder
JPS5242363B2 (de) * 1973-03-20 1977-10-24
JPS5133758A (de) * 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
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 (en) 1981-03-10
AU514316B2 (en) 1981-02-05
US4137342A (en) 1979-01-30
FR2369214B1 (de) 1984-06-29
SU921474A3 (ru) 1982-04-15
NL188483C (nl) 1992-07-01
BE860291A (fr) 1978-04-28
GB1594727A (en) 1981-08-05
AT365356B (de) 1982-01-11
FR2369214A1 (fr) 1978-05-26
IT1090198B (it) 1985-06-18
AU2969177A (en) 1979-04-26
DE2749010C2 (de) 1983-01-20

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Legal Events

Date Code Title Description
ELA Expired due to lapse of time