NL164695C - PROCESS FOR THE PREPARATION OF FERROMAGNETIC CHROME DIOXIDE, NEEDULAR FERROMAGNETIC CHROME DIOXIDE PARTICLES OBTAINED BY THIS PROCESS AND MAGNETIC RECORDING. - Google Patents

PROCESS FOR THE PREPARATION OF FERROMAGNETIC CHROME DIOXIDE, NEEDULAR FERROMAGNETIC CHROME DIOXIDE PARTICLES OBTAINED BY THIS PROCESS AND MAGNETIC RECORDING.

Info

Publication number
NL164695C
NL164695C NL6907918A NL6907918A NL164695C NL 164695 C NL164695 C NL 164695C NL 6907918 A NL6907918 A NL 6907918A NL 6907918 A NL6907918 A NL 6907918A NL 164695 C NL164695 C NL 164695C
Authority
NL
Netherlands
Prior art keywords
ferromagnetic
chrome dioxide
needular
ferromagnetic chrome
preparation
Prior art date
Application number
NL6907918A
Other languages
Dutch (nl)
Other versions
NL6907918A (en
NL164695B (en
Original Assignee
Du Pont
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 Du Pont filed Critical Du Pont
Publication of NL6907918A publication Critical patent/NL6907918A/xx
Publication of NL164695B publication Critical patent/NL164695B/en
Application granted granted Critical
Publication of NL164695C publication Critical patent/NL164695C/en

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
    • G11B5/70636—CrO2
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G37/00—Compounds of chromium
    • C01G37/02—Oxides or hydrates thereof
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
NL6907918A 1968-05-27 1969-05-23 PROCESS FOR THE PREPARATION OF FERROMAGNETIC CHROME DIOXIDE, NEEDULAR FERROMAGNETIC CHROME DIOXIDE PARTICLES OBTAINED BY THIS PROCESS AND MAGNETIC RECORDING. NL164695C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73210968A 1968-05-27 1968-05-27

Publications (3)

Publication Number Publication Date
NL6907918A NL6907918A (en) 1969-12-01
NL164695B NL164695B (en) 1980-08-15
NL164695C true NL164695C (en) 1981-01-15

Family

ID=24942226

Family Applications (1)

Application Number Title Priority Date Filing Date
NL6907918A NL164695C (en) 1968-05-27 1969-05-23 PROCESS FOR THE PREPARATION OF FERROMAGNETIC CHROME DIOXIDE, NEEDULAR FERROMAGNETIC CHROME DIOXIDE PARTICLES OBTAINED BY THIS PROCESS AND MAGNETIC RECORDING.

Country Status (6)

Country Link
JP (2) JPS4819074B1 (en)
BE (1) BE733550A (en)
FR (1) FR2009424A1 (en)
GB (1) GB1241773A (en)
MY (1) MY7300325A (en)
NL (1) NL164695C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3828498A1 (en) * 1988-08-23 1990-03-01 Basf Ag CHROME DIOXIDE MATERIAL, METHOD FOR THE PRODUCTION THEREOF AND MAGNETIC RECORDING CARRIER CONTAINING THIS CHROME DIOXIDE MATERIAL

Also Published As

Publication number Publication date
JPS5229840B1 (en) 1977-08-04
BE733550A (en) 1969-11-24
DE1925541A1 (en) 1970-03-12
FR2009424A1 (en) 1970-02-06
NL6907918A (en) 1969-12-01
GB1241773A (en) 1971-08-04
NL164695B (en) 1980-08-15
MY7300325A (en) 1973-12-31
JPS4819074B1 (en) 1973-06-11
DE1925541B2 (en) 1977-07-14

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Legal Events

Date Code Title Description
V4 Lapsed because of reaching the maxim lifetime of a patent