FR2329594B1 - - Google Patents

Info

Publication number
FR2329594B1
FR2329594B1 FR7632529A FR7632529A FR2329594B1 FR 2329594 B1 FR2329594 B1 FR 2329594B1 FR 7632529 A FR7632529 A FR 7632529A FR 7632529 A FR7632529 A FR 7632529A FR 2329594 B1 FR2329594 B1 FR 2329594B1
Authority
FR
France
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
FR7632529A
Other languages
French (fr)
Other versions
FR2329594A1 (fr
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
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 FR2329594A1 publication Critical patent/FR2329594A1/fr
Application granted granted Critical
Publication of FR2329594B1 publication Critical patent/FR2329594B1/fr
Granted 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
    • 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)
FR7632529A 1975-10-31 1976-10-28 Procede de preparation de bioxyde de chrome ferromagnetique Granted FR2329594A1 (fr)

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 (2)

Publication Number Publication Date
FR2329594A1 FR2329594A1 (fr) 1977-05-27
FR2329594B1 true FR2329594B1 (OSRAM) 1981-07-31

Family

ID=11224583

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7632529A Granted FR2329594A1 (fr) 1975-10-31 1976-10-28 Procede de preparation de bioxyde de chrome ferromagnetique

Country Status (17)

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

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 (OSRAM) * 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
NL7611785A (nl) 1977-05-03
AU502999B2 (en) 1979-08-16
DE2648305A1 (de) 1977-05-12
CS207373B2 (en) 1981-07-31
CA1090555A (en) 1980-12-02
SE7611815L (sv) 1977-05-01
DD127640A5 (OSRAM) 1977-10-05
ATA800476A (de) 1979-09-15
DE2648305C3 (de) 1982-11-25
DE2648305B2 (de) 1980-07-03
FR2329594A1 (fr) 1977-05-27
CH625193A5 (en) 1981-09-15
AU1911876A (en) 1978-05-04
BE847812A (fr) 1977-04-29
JPS5722893B2 (OSRAM) 1982-05-15
BR7607234A (pt) 1977-09-13
GB1524576A (en) 1978-09-13
AT356062B (de) 1980-04-10
IT1045191B (it) 1980-05-10
ES452891A1 (es) 1977-10-16
JPS5274597A (en) 1977-06-22
DK481376A (da) 1977-05-01

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Legal Events

Date Code Title Description
ST Notification of lapse