IT1045191B - Procedimento per la produzione di biossido di cromo ferromagnetico - Google Patents

Procedimento per la produzione di biossido di cromo ferromagnetico

Info

Publication number
IT1045191B
IT1045191B IT28915/75A IT2891575A IT1045191B IT 1045191 B IT1045191 B IT 1045191B IT 28915/75 A IT28915/75 A IT 28915/75A IT 2891575 A IT2891575 A IT 2891575A IT 1045191 B IT1045191 B IT 1045191B
Authority
IT
Italy
Prior art keywords
procedure
production
chromium dioxide
ferromagnetic chromium
ferromagnetic
Prior art date
Application number
IT28915/75A
Other languages
English (en)
Italian (it)
Inventor
A Mazza
G Basile
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
Priority to IT28915/75A priority Critical patent/IT1045191B/it
Priority to DK481376A priority patent/DK481376A/da
Priority to NL7611785A priority patent/NL7611785A/xx
Priority to SE7611815A priority patent/SE7611815L/xx
Priority to CH1351376A priority patent/CH625193A5/it
Priority to DE2648305A priority patent/DE2648305C3/de
Priority to CA264,248A priority patent/CA1090555A/en
Priority to CS766928A priority patent/CS207373B2/cs
Priority to BR7607234A priority patent/BR7607234A/pt
Priority to AT800476A priority patent/AT356062B/de
Priority to FR7632529A priority patent/FR2329594A1/fr
Priority to DD195502A priority patent/DD127640A5/xx
Priority to AU19118/76A priority patent/AU502999B2/en
Priority to BE171938A priority patent/BE847812A/xx
Priority to JP51130370A priority patent/JPS5274597A/ja
Priority to GB45138/76A priority patent/GB1524576A/en
Priority to ES452891A priority patent/ES452891A1/es
Application granted granted Critical
Publication of IT1045191B publication Critical patent/IT1045191B/it

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)
IT28915/75A 1975-10-31 1975-10-31 Procedimento per la produzione di biossido di cromo ferromagnetico IT1045191B (it)

Priority Applications (17)

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
DK481376A DK481376A (da) 1975-10-31 1976-10-25 Fremgangsmade til fremstilling af ferromagnetisk chromdioxid
NL7611785A NL7611785A (nl) 1975-10-31 1976-10-25 Werkwijze voor de bereiding van ferromagnetisch chroomdioxyde, alsmede ferromagnetische band die dit bevat.
SE7611815A SE7611815L (sv) 1975-10-31 1976-10-25 Forfarande for framstellning av ferromagnetisk kromdioxid
CH1351376A CH625193A5 (en) 1975-10-31 1976-10-25 Process for producing ferromagnetic chromium dioxide
CA264,248A CA1090555A (en) 1975-10-31 1976-10-26 Process for preparing ferromagnetic chromium dioxide
DE2648305A DE2648305C3 (de) 1975-10-31 1976-10-26 Modifiziertes ferromagnetisches Chromdioxid und Verfahren zu seiner Herstellung
BR7607234A BR7607234A (pt) 1975-10-31 1976-10-27 Processo para a preparacao de dioxido de cromo ferromagnetico
CS766928A CS207373B2 (en) 1975-10-31 1976-10-27 Method of making the modified ferromagnetic chromium dioxide
AT800476A AT356062B (de) 1975-10-31 1976-10-28 Verfahren zur herstellung von modifiziertem ferromagnetischem chromdioxid
FR7632529A FR2329594A1 (fr) 1975-10-31 1976-10-28 Procede de preparation de bioxyde de chrome ferromagnetique
DD195502A DD127640A5 (cs) 1975-10-31 1976-10-28
AU19118/76A AU502999B2 (en) 1975-10-31 1976-10-28 Ferogmagnetic chromium dioxide
BE171938A BE847812A (fr) 1975-10-31 1976-10-29 Procede de preparation de bioxyde de chrome ferromagnetique,
JP51130370A JPS5274597A (en) 1975-10-31 1976-10-29 Process for producing ferromagnetic chromium dioxide
GB45138/76A GB1524576A (en) 1975-10-31 1976-10-29 Process for preparing ferromagnetic chromium dioxide
ES452891A ES452891A1 (es) 1975-10-31 1976-10-30 Un procedimiento para la preparacion de dioxido de cromo fe-rromagnetico.

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
IT1045191B true IT1045191B (it) 1980-05-10

Family

ID=11224583

Family Applications (1)

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

Country Status (17)

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

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 (cs) * 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
AU502999B2 (en) 1979-08-16
ES452891A1 (es) 1977-10-16
DK481376A (da) 1977-05-01
DE2648305A1 (de) 1977-05-12
AT356062B (de) 1980-04-10
FR2329594A1 (fr) 1977-05-27
AU1911876A (en) 1978-05-04
BE847812A (fr) 1977-04-29
BR7607234A (pt) 1977-09-13
DE2648305C3 (de) 1982-11-25
GB1524576A (en) 1978-09-13
NL7611785A (nl) 1977-05-03
CS207373B2 (en) 1981-07-31
JPS5274597A (en) 1977-06-22
SE7611815L (sv) 1977-05-01
CA1090555A (en) 1980-12-02
CH625193A5 (en) 1981-09-15
DD127640A5 (cs) 1977-10-05
ATA800476A (de) 1979-09-15
JPS5722893B2 (cs) 1982-05-15
DE2648305B2 (de) 1980-07-03
FR2329594B1 (cs) 1981-07-31

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