JPS5439359B1 - - Google Patents

Info

Publication number
JPS5439359B1
JPS5439359B1 JP8217371A JP8217371A JPS5439359B1 JP S5439359 B1 JPS5439359 B1 JP S5439359B1 JP 8217371 A JP8217371 A JP 8217371A JP 8217371 A JP8217371 A JP 8217371A JP S5439359 B1 JPS5439359 B1 JP S5439359B1
Authority
JP
Japan
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.)
Pending
Application number
JP8217371A
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 filed Critical
Publication of JPS5439359B1 publication Critical patent/JPS5439359B1/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/0302—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity characterised by unspecified or heterogeneous hardness or specially adapted for magnetic hardness transitions
    • H01F1/0311—Compounds
    • H01F1/0313—Oxidic compounds
    • 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
    • G11B5/70636—CrO2
    • 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
    • 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
    • Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
JP8217371A 1970-10-19 1971-10-19 Pending JPS5439359B1 (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8211770A 1970-10-19 1970-10-19

Publications (1)

Publication Number Publication Date
JPS5439359B1 true JPS5439359B1 (ja) 1979-11-27

Family

ID=22169173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8217371A Pending JPS5439359B1 (ja) 1970-10-19 1971-10-19

Country Status (6)

Country Link
US (1) US3687726A (ja)
JP (1) JPS5439359B1 (ja)
DE (1) DE2151471C3 (ja)
FR (1) FR2111498A5 (ja)
GB (1) GB1330938A (ja)
NL (1) NL174888C (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2119932C3 (de) * 1971-04-23 1981-07-30 Basf Ag, 6700 Ludwigshafen Ferromagnetische Chromdioxidkristalle
US4068038A (en) * 1972-05-24 1978-01-10 Montecatini Edison S.P.A. Stabilized chromium dioxide compositions
IT1012202B (it) * 1974-05-09 1977-03-10 Montedison Spa Procedimento per la produzione di biossido di cromo ferromagnetico
IT1097025B (it) * 1978-07-21 1985-08-26 Montedison Spa Biossido di cromo ferromagnetico stabilizzato e procedimento per ottenerlo
US4495246A (en) * 1983-10-27 1985-01-22 Basf Aktiengesellschaft Acicular ferromagnetic chromium dioxide particles
DE3536116A1 (de) * 1985-10-10 1987-04-16 Basf Ag Verfahren zur stabilisierung von nadelfoermigem ferromagnetischem chromdioxid
DE3718299A1 (de) * 1987-05-30 1988-12-15 Basf Ag Verfahren zur herstellung von stabilisiertem nadelfoermigem ferromagnetischem chromdioxid
DE3828498A1 (de) * 1988-08-23 1990-03-01 Basf Ag Chromdioxidmaterial, verfahren zu dessen herstellung sowie magnetische aufzeichnungstraeger enthaltend dieses chromdioxidmaterial
DE3843442A1 (de) * 1988-12-23 1990-06-28 Basf Ag Magnetische aufzeichnungstraeger
US5217810A (en) * 1988-12-23 1993-06-08 Basf Aktiengesellschaft Magnetic recording medium having a magnetic layer containing chromium dioxide particles and linolenic acid
DE3941578A1 (de) * 1989-12-16 1991-06-20 Basf Ag Verfahren zur herstellung von stabilisiertem chromdioxid und magnetischer aufzeichnungstraeger enthaltend dieses material

Also Published As

Publication number Publication date
DE2151471B2 (de) 1973-07-05
FR2111498A5 (ja) 1972-06-02
NL7114336A (ja) 1972-04-21
DE2151471C3 (de) 1974-02-14
NL174888B (nl) 1984-03-16
GB1330938A (en) 1973-09-19
US3687726A (en) 1972-08-29
NL174888C (nl) 1984-08-16
DE2151471A1 (de) 1972-04-20

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