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CH545252A - Process for the production of ferromagnetic chromium dioxide - Google Patents

Process for the production of ferromagnetic chromium dioxide

Info

Publication number
CH545252A
CH545252A CH610070A CH610070A CH545252A CH 545252 A CH545252 A CH 545252A CH 610070 A CH610070 A CH 610070A CH 610070 A CH610070 A CH 610070A CH 545252 A CH545252 A CH 545252A
Authority
CH
Switzerland
Prior art keywords
production
chromium dioxide
ferromagnetic chromium
ferromagnetic
dioxide
Prior art date
Application number
CH610070A
Other languages
German (de)
Inventor
Fritz Dr Rodi
Original Assignee
Bayer Ag
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 Bayer Ag filed Critical Bayer Ag
Publication of CH545252A publication Critical patent/CH545252A/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • 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
    • C01P2004/00—Particle morphology
    • C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Nanotechnology (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Inorganic Chemistry (AREA)
  • Composite Materials (AREA)
  • Hard Magnetic Materials (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Magnetic Record Carriers (AREA)
CH610070A 1969-05-02 1970-04-23 Process for the production of ferromagnetic chromium dioxide CH545252A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691922409 DE1922409A1 (en) 1969-05-02 1969-05-02 Process for the production of ferromagnetic chromium dioxide

Publications (1)

Publication Number Publication Date
CH545252A true CH545252A (en) 1973-12-15

Family

ID=5733048

Family Applications (1)

Application Number Title Priority Date Filing Date
CH610070A CH545252A (en) 1969-05-02 1970-04-23 Process for the production of ferromagnetic chromium dioxide

Country Status (10)

Country Link
US (1) US3696039A (en)
JP (1) JPS4828274B1 (en)
BE (1) BE749818A (en)
CA (1) CA932944A (en)
CH (1) CH545252A (en)
DE (1) DE1922409A1 (en)
FR (1) FR2041805B1 (en)
GB (1) GB1316664A (en)
NL (1) NL7006481A (en)
SE (1) SE345649B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE389220B (en) * 1972-06-30 1976-10-25 Montedison Spa METHOD OF MANUFACTURE OF FERROMAGNETIC CHRONIOXIDE WITH FINE AND HOMOGENEOUS GRANULOMETRY WHICH WAY PROVIDES SELECTED MAGNETIC PROPERTIES
IT1045191B (en) * 1975-10-31 1980-05-10 Montedison Spa PROCEDURE FOR THE PRODUCTION OF FERROMAGNETIC CHROMIUM DIOXIDE
DE3609971A1 (en) * 1986-03-25 1987-10-01 Basf Ag METHOD FOR THE PRODUCTION OF CHROME (III) OXIDE, A DEVICE FOR CARRYING OUT THE METHOD AND THE USE OF THE CHROME (III) OXIDE AS THE STARTING MATERIAL FOR THE CHROME DIOXIDE SYNTHESIS
US4698220A (en) * 1986-03-28 1987-10-06 E. I. Du Pont De Nemours And Company Partitioned reduction process for ferromagnetic chromium dioxide
US4769165A (en) * 1987-01-20 1988-09-06 E. I. Du Pont De Nemours And Company Process for synthesis of ferromagnetic chromium dioxide
DE3728453A1 (en) * 1987-08-26 1989-03-09 Basf Ag METHOD FOR PRODUCING MODIFIED FERROMAGNETIC CHROMDIOXIDE

Also Published As

Publication number Publication date
US3696039A (en) 1972-10-03
FR2041805A1 (en) 1971-02-05
BE749818A (en) 1970-10-30
CA932944A (en) 1973-09-04
DE1922409A1 (en) 1970-11-12
JPS4828274B1 (en) 1973-08-30
GB1316664A (en) 1973-05-09
NL7006481A (en) 1970-11-04
SE345649B (en) 1972-06-05
FR2041805B1 (en) 1974-04-26

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Legal Events

Date Code Title Description
PL Patent ceased