CA947041A - Method for the preparation of ferromagnetic chromium dioxide - Google Patents

Method for the preparation of ferromagnetic chromium dioxide

Info

Publication number
CA947041A
CA947041A CA115,975A CA115975A CA947041A CA 947041 A CA947041 A CA 947041A CA 115975 A CA115975 A CA 115975A CA 947041 A CA947041 A CA 947041A
Authority
CA
Canada
Prior art keywords
preparation
chromium dioxide
ferromagnetic chromium
ferromagnetic
dioxide
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
CA115,975A
Other languages
English (en)
Other versions
CA115975S (en
Inventor
Giampiero Basile
Ugo Montiglio
Domenico Morero
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.)
Montedison SpA
Original Assignee
Montecatini Edison SpA
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 Montecatini Edison SpA filed Critical Montecatini Edison SpA
Application granted granted Critical
Publication of CA947041A publication Critical patent/CA947041A/en
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
    • G11B5/70636—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
    • C01P2004/00—Particle morphology
    • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/54—Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension
    • 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
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Magnetic Record Carriers (AREA)
  • Powder Metallurgy (AREA)
  • Soft Magnetic Materials (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
CA115,975A 1970-06-23 1971-06-17 Method for the preparation of ferromagnetic chromium dioxide Expired CA947041A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2641270 1970-06-23

Publications (1)

Publication Number Publication Date
CA947041A true CA947041A (en) 1974-05-14

Family

ID=11219419

Family Applications (1)

Application Number Title Priority Date Filing Date
CA115,975A Expired CA947041A (en) 1970-06-23 1971-06-17 Method for the preparation of ferromagnetic chromium dioxide

Country Status (8)

Country Link
BE (1) BE768910A (cs)
CA (1) CA947041A (cs)
DE (1) DE2130547A1 (cs)
ES (1) ES392394A1 (cs)
FR (1) FR2096427B1 (cs)
GB (1) GB1343622A (cs)
NL (1) NL7108266A (cs)
SE (1) SE369184B (cs)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1534634A2 (en) * 2002-08-29 2005-06-01 Tata Institute of Fundamental Research Chromium dioxide (cro sb 2 /sb ) and composites of chromium dioxide and other oxides of chromium such as cro sb 2 /sb /cr sb 2 /sb o sb 3 /sb and cro sb 2 /sb /cr sb 2 /sb o sb 5 /sb and process for manufacturing the same

Also Published As

Publication number Publication date
GB1343622A (en) 1974-01-16
ES392394A1 (es) 1973-08-01
SE369184B (cs) 1974-08-12
DE2130547A1 (de) 1971-12-30
NL7108266A (cs) 1971-12-27
FR2096427A1 (cs) 1972-02-18
BE768910A (fr) 1971-12-23
FR2096427B1 (cs) 1974-03-08

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