IT1012202B - Procedimento per la produzione di biossido di cromo ferromagnetico - Google Patents

Procedimento per la produzione di biossido di cromo ferromagnetico

Info

Publication number
IT1012202B
IT1012202B IT22489/74A IT2248974A IT1012202B IT 1012202 B IT1012202 B IT 1012202B IT 22489/74 A IT22489/74 A IT 22489/74A IT 2248974 A IT2248974 A IT 2248974A IT 1012202 B IT1012202 B IT 1012202B
Authority
IT
Italy
Prior art keywords
procedure
production
ferromagnetic
chrome dioxide
dioxide
Prior art date
Application number
IT22489/74A
Other languages
English (en)
Inventor
U Montiglio
E Gallinotti
G Basile
P Aspes
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 IT22489/74A priority Critical patent/IT1012202B/it
Priority to US05/572,655 priority patent/US3979310A/en
Priority to NL7505204A priority patent/NL7505204A/xx
Priority to SE7505168A priority patent/SE406243B/xx
Priority to GB18771/75A priority patent/GB1504166A/en
Priority to DK194875A priority patent/DK194875A/da
Priority to DE2520030A priority patent/DE2520030C3/de
Priority to CH602475A priority patent/CH617910A5/it
Priority to SU752130665A priority patent/SU612618A3/ru
Priority to AU80912/75A priority patent/AU486946B2/en
Priority to AT351675A priority patent/AT337140B/de
Priority to DD185899A priority patent/DD118050A5/xx
Priority to BR3554/75A priority patent/BR7502784A/pt
Priority to JP5537475A priority patent/JPS5521445B2/ja
Priority to CA226,540A priority patent/CA1049250A/en
Priority to CS753247A priority patent/CS324775A2/cs
Priority to BE156193A priority patent/BE828887A/xx
Priority to FR7514504A priority patent/FR2270206A1/fr
Application granted granted Critical
Publication of IT1012202B publication Critical patent/IT1012202B/it

Links

Classifications

    • 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
    • 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
    • C01P2004/54—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
    • C01P2004/62—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
    • 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
IT22489/74A 1974-05-09 1974-05-09 Procedimento per la produzione di biossido di cromo ferromagnetico IT1012202B (it)

Priority Applications (18)

Application Number Priority Date Filing Date Title
IT22489/74A IT1012202B (it) 1974-05-09 1974-05-09 Procedimento per la produzione di biossido di cromo ferromagnetico
US05/572,655 US3979310A (en) 1974-05-09 1975-04-29 Process for preparing ferromagnetic chromium dioxide
NL7505204A NL7505204A (nl) 1974-05-09 1975-05-02 Werkwijze voor de bereiding van ferromagnetisch chroomdioxyde.
SE7505168A SE406243B (sv) 1974-05-09 1975-05-05 Forfarande for framstellning av ferromagnetisk kromdioxid
GB18771/75A GB1504166A (en) 1974-05-09 1975-05-05 Preparation of ferromagnetic chromium dioxide
DK194875A DK194875A (da) 1974-05-09 1975-05-05 Fremgangsmade til fremstilling af ferromagnetisk chromdioxid
CH602475A CH617910A5 (it) 1974-05-09 1975-05-06
DE2520030A DE2520030C3 (de) 1974-05-09 1975-05-06 Verfahren zur Herstellung von ferromagnetischem Chromdioxyd
SU752130665A SU612618A3 (ru) 1974-05-09 1975-05-07 Способ получени ферромагнитной двуокиси хрома
AU80912/75A AU486946B2 (en) 1974-05-09 1975-05-07 Process forthe preparation of ferromagnetic chromium dioxide
AT351675A AT337140B (de) 1974-05-09 1975-05-07 Verfahren zur herstellung von ferromagnetischem chromdioxid
DD185899A DD118050A5 (it) 1974-05-09 1975-05-07
BR3554/75A BR7502784A (pt) 1974-05-09 1975-05-07 Processo para a preparacao de dioxido de cromo ferromagnetico
JP5537475A JPS5521445B2 (it) 1974-05-09 1975-05-07
CA226,540A CA1049250A (en) 1974-05-09 1975-05-08 Process for preparing ferromagnetic chromium dioxide
CS753247A CS324775A2 (en) 1974-05-09 1975-05-08 Zpusob vyroby ferromagnetickeho kyslicniku chromiciteho
BE156193A BE828887A (fr) 1974-05-09 1975-05-09 Procede de production de bioxyde de chrome ferromagnetique et bioxyde de chrome ainsi obtenu
FR7514504A FR2270206A1 (it) 1974-05-09 1975-05-09

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT22489/74A IT1012202B (it) 1974-05-09 1974-05-09 Procedimento per la produzione di biossido di cromo ferromagnetico

Publications (1)

Publication Number Publication Date
IT1012202B true IT1012202B (it) 1977-03-10

Family

ID=11196949

Family Applications (1)

Application Number Title Priority Date Filing Date
IT22489/74A IT1012202B (it) 1974-05-09 1974-05-09 Procedimento per la produzione di biossido di cromo ferromagnetico

Country Status (17)

Country Link
US (1) US3979310A (it)
JP (1) JPS5521445B2 (it)
AT (1) AT337140B (it)
BE (1) BE828887A (it)
BR (1) BR7502784A (it)
CA (1) CA1049250A (it)
CH (1) CH617910A5 (it)
CS (1) CS324775A2 (it)
DD (1) DD118050A5 (it)
DE (1) DE2520030C3 (it)
DK (1) DK194875A (it)
FR (1) FR2270206A1 (it)
GB (1) GB1504166A (it)
IT (1) IT1012202B (it)
NL (1) NL7505204A (it)
SE (1) SE406243B (it)
SU (1) SU612618A3 (it)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4311770A (en) * 1977-10-04 1982-01-19 Agence Nationale De Valorisation De La Recherche (Anvar) Novel ferromagnetic chromium dioxide and rhodium dioxide material and its preparation
FR2433483A2 (fr) * 1978-08-18 1980-03-14 Anvar Materiau ferromagnetique a base de dioxyde de chrome et de dioxyde de rhodium et son obtention
DE3536116A1 (de) * 1985-10-10 1987-04-16 Basf Ag Verfahren zur stabilisierung von nadelfoermigem ferromagnetischem chromdioxid
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 (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
AU2003276682A1 (en) * 2002-08-29 2004-03-19 Tata Institute Of Fundamental Research Chromium dioxide (cro2) and composites of chromium dioxide and other oxides of chromium such as cro2/cr2o3 and cro2/cr2o5 and process for manufacturing the same

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3034988A (en) * 1958-08-22 1962-05-15 Du Pont Modified chromium oxide ferromagnetic compositions, their preparation and use
US2923683A (en) * 1957-06-19 1960-02-02 Du Pont Antimony-modified chromium oxide ferromagnetic compositions, their preparation and use
US3074778A (en) * 1959-09-24 1963-01-22 Du Pont Process for producing ferromagnetic chromium oxide
US2956955A (en) * 1960-02-12 1960-10-18 Du Pont Ferromagnetic chromium oxide and method of making
US3117093A (en) * 1960-10-24 1964-01-07 Du Pont Process for the preparation of ferromagnetic chromium dioxide
US3278263A (en) * 1964-11-27 1966-10-11 Du Pont Ferromagnetic chromium dioxide and preparation thereof
US3423320A (en) * 1965-12-14 1969-01-21 Du Pont Preparation of ferromagnetic chromium dioxide
US3449073A (en) * 1965-12-14 1969-06-10 Du Pont Process for preparing chromium dioxide and product thereof
US3451771A (en) * 1966-10-27 1969-06-24 Du Pont Preparation of ferromagnetic cro2 by heating cro3 in the presence of o2 and cr2o3
US3529930A (en) * 1968-02-13 1970-09-22 Du Pont Process for improving ferromagnetic properties of chromium dioxide by heating in an oxidizing environment
US3450491A (en) * 1968-08-01 1969-06-17 Du Pont Preparation of mcr3o8,where m is an alkali metal,from cro3,cr2o3 and m2cr2o7
US3686031A (en) * 1969-11-26 1972-08-22 Du Pont Metal phosphate coated ferromagnetic chromium oxide and its preparation
DE2022820C3 (de) * 1970-05-11 1980-01-03 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von hochkoerzitivem Chromdioxid
US3687726A (en) * 1970-10-19 1972-08-29 Du Pont Alumina coated chromium dioxide
AU452489B2 (en) * 1971-03-04 1974-08-16 Montecatini Edisons. P. A Process for preparing ferromagnetic chromium dioxide
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
SE7505168L (sv) 1975-11-10
CH617910A5 (it) 1980-06-30
SU612618A3 (ru) 1978-06-25
JPS50154798A (it) 1975-12-13
DD118050A5 (it) 1976-02-12
AU8091275A (en) 1976-11-11
BE828887A (fr) 1975-11-10
DK194875A (da) 1975-11-10
AT337140B (de) 1977-06-10
DE2520030B2 (de) 1977-09-15
CS324775A2 (en) 1987-08-13
FR2270206A1 (it) 1975-12-05
GB1504166A (en) 1978-03-15
DE2520030A1 (de) 1975-11-13
NL7505204A (nl) 1975-11-11
SE406243B (sv) 1979-01-29
ATA351675A (de) 1976-10-15
CA1049250A (en) 1979-02-27
DE2520030C3 (de) 1981-07-09
BR7502784A (pt) 1976-03-16
US3979310A (en) 1976-09-07
JPS5521445B2 (it) 1980-06-10

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