CS207373B2 - Method of making the modified ferromagnetic chromium dioxide - Google Patents

Method of making the modified ferromagnetic chromium dioxide Download PDF

Info

Publication number
CS207373B2
CS207373B2 CS766928A CS692876A CS207373B2 CS 207373 B2 CS207373 B2 CS 207373B2 CS 766928 A CS766928 A CS 766928A CS 692876 A CS692876 A CS 692876A CS 207373 B2 CS207373 B2 CS 207373B2
Authority
CS
Czechoslovakia
Prior art keywords
chromium
tellurium
compound
mixture
ruthenium
Prior art date
Application number
CS766928A
Other languages
Czech (cs)
English (en)
Inventor
Giampiero Basile
Antonio Mazza
Original Assignee
Montedison 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 Montedison Spa filed Critical Montedison Spa
Publication of CS207373B2 publication Critical patent/CS207373B2/cs

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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
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G37/00—Compounds of chromium
    • C01G37/02—Oxides or hydrates thereof
    • C01G37/027—Chromium dioxide
    • 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
    • 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
    • C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
    • 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
    • C01P2006/80—Compositional purity

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Magnetic Record Carriers (AREA)
  • Chemical Treatment Of Metals (AREA)
CS766928A 1975-10-31 1976-10-27 Method of making the modified ferromagnetic chromium dioxide CS207373B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT28915/75A IT1045191B (it) 1975-10-31 1975-10-31 Procedimento per la produzione di biossido di cromo ferromagnetico

Publications (1)

Publication Number Publication Date
CS207373B2 true CS207373B2 (en) 1981-07-31

Family

ID=11224583

Family Applications (1)

Application Number Title Priority Date Filing Date
CS766928A CS207373B2 (en) 1975-10-31 1976-10-27 Method of making the modified ferromagnetic chromium dioxide

Country Status (17)

Country Link
JP (1) JPS5274597A (sv)
AT (1) AT356062B (sv)
AU (1) AU502999B2 (sv)
BE (1) BE847812A (sv)
BR (1) BR7607234A (sv)
CA (1) CA1090555A (sv)
CH (1) CH625193A5 (sv)
CS (1) CS207373B2 (sv)
DD (1) DD127640A5 (sv)
DE (1) DE2648305C3 (sv)
DK (1) DK481376A (sv)
ES (1) ES452891A1 (sv)
FR (1) FR2329594A1 (sv)
GB (1) GB1524576A (sv)
IT (1) IT1045191B (sv)
NL (1) NL7611785A (sv)
SE (1) SE7611815L (sv)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4524008A (en) * 1983-12-16 1985-06-18 E. I. Du Pont De Nemours And Company Controlled initiation chromium dioxide synthesis
DE3728453A1 (de) * 1987-08-26 1989-03-09 Basf Ag Verfahren zur herstellung von modifiziertem, ferromagnetischem chromdioxid
DE3837646A1 (de) * 1988-11-05 1990-05-10 Basf Ag Nadelfoermiges, im wesentlichen aus chromdioxid bestehendes, ferromagnetisches material
DE4339841A1 (de) * 1993-11-23 1995-05-24 Basf Magnetics Gmbh Feinteiliges nadfelförmiges magnetisches modifiziertes Chromdioxid

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2885365A (en) * 1956-10-22 1959-05-05 Du Pont Ruthenium-modified chromium oxide ferromagnetic compositions, their pre-aration and use
DE1467328B2 (de) * 1963-07-24 1971-06-16 Farbenfabriken Bayer AG, 5090 Le verkusen Ferromagnetisches modifiziertes chromdioxid
US3278263A (en) * 1964-11-27 1966-10-11 Du Pont Ferromagnetic chromium dioxide and preparation thereof
CH468923A (de) * 1967-07-21 1969-02-28 Ferag Ag Transporteinrichtung für in einer Schuppenformation anfallende flächenhafte Gebilde
DE1802469A1 (de) * 1968-10-11 1971-10-28 Bayer Ag Verfahren zur Herstellung von ferromagnetischem Chromdioxid
DE1922409A1 (de) * 1969-05-02 1970-11-12 Bayer Ag Verfahren zur Herstellung von ferromagnetischem Chromdioxid
DE2022820C3 (de) * 1970-05-11 1980-01-03 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von hochkoerzitivem Chromdioxid
AU452489B2 (en) * 1971-03-04 1974-08-16 Montecatini Edisons. P. A Process for preparing ferromagnetic chromium dioxide
JPS497198A (sv) * 1972-05-12 1974-01-22
IT956230B (it) * 1972-04-22 1973-10-10 Montedison Spa Composizione di biossido di cromo ferromagnetico modificato e p oces so di preparazione

Also Published As

Publication number Publication date
JPS5722893B2 (sv) 1982-05-15
GB1524576A (en) 1978-09-13
CA1090555A (en) 1980-12-02
AU1911876A (en) 1978-05-04
DD127640A5 (sv) 1977-10-05
AU502999B2 (en) 1979-08-16
CH625193A5 (en) 1981-09-15
IT1045191B (it) 1980-05-10
SE7611815L (sv) 1977-05-01
ATA800476A (de) 1979-09-15
BR7607234A (pt) 1977-09-13
DK481376A (da) 1977-05-01
ES452891A1 (es) 1977-10-16
AT356062B (de) 1980-04-10
BE847812A (fr) 1977-04-29
DE2648305A1 (de) 1977-05-12
DE2648305B2 (de) 1980-07-03
FR2329594A1 (fr) 1977-05-27
NL7611785A (nl) 1977-05-03
FR2329594B1 (sv) 1981-07-31
JPS5274597A (en) 1977-06-22
DE2648305C3 (de) 1982-11-25

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