BE828887A - Procede de production de bioxyde de chrome ferromagnetique et bioxyde de chrome ainsi obtenu - Google Patents

Procede de production de bioxyde de chrome ferromagnetique et bioxyde de chrome ainsi obtenu

Info

Publication number
BE828887A
BE828887A BE156193A BE156193A BE828887A BE 828887 A BE828887 A BE 828887A BE 156193 A BE156193 A BE 156193A BE 156193 A BE156193 A BE 156193A BE 828887 A BE828887 A BE 828887A
Authority
BE
Belgium
Prior art keywords
bioxide
chrome
production
ferromagnetic
ferromagnetic chrome
Prior art date
Application number
BE156193A
Other languages
English (en)
Inventor
U Montiglio
G Basile
P Aspes
E Gallinotti
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 filed Critical
Publication of BE828887A publication Critical patent/BE828887A/fr

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
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Nanotechnology (AREA)
  • Organic Chemistry (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Composite Materials (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
BE156193A 1974-05-09 1975-05-09 Procede de production de bioxyde de chrome ferromagnetique et bioxyde de chrome ainsi obtenu BE828887A (fr)

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
BE828887A true BE828887A (fr) 1975-11-10

Family

ID=11196949

Family Applications (1)

Application Number Title Priority Date Filing Date
BE156193A BE828887A (fr) 1974-05-09 1975-05-09 Procede de production de bioxyde de chrome ferromagnetique et bioxyde de chrome ainsi obtenu

Country Status (17)

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

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
US3449073A (en) * 1965-12-14 1969-06-10 Du Pont Process for preparing chromium dioxide and product thereof
US3423320A (en) * 1965-12-14 1969-01-21 Du Pont Preparation of ferromagnetic chromium dioxide
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
FR2270206A1 (fr) 1975-12-05
IT1012202B (it) 1977-03-10
SE406243B (sv) 1979-01-29
CH617910A5 (fr) 1980-06-30
SU612618A3 (ru) 1978-06-25
GB1504166A (en) 1978-03-15
JPS5521445B2 (fr) 1980-06-10
JPS50154798A (fr) 1975-12-13
SE7505168L (sv) 1975-11-10
AU8091275A (en) 1976-11-11
DE2520030A1 (de) 1975-11-13
DE2520030C3 (de) 1981-07-09
NL7505204A (nl) 1975-11-11
US3979310A (en) 1976-09-07
DE2520030B2 (de) 1977-09-15
ATA351675A (de) 1976-10-15
DD118050A5 (fr) 1976-02-12
CA1049250A (fr) 1979-02-27
DK194875A (da) 1975-11-10
CS324775A2 (en) 1987-08-13
AT337140B (de) 1977-06-10
BR7502784A (pt) 1976-03-16

Similar Documents

Publication Publication Date Title
BE814053A (fr) Procede de revetement de superalliages et pieces ainsi obtenues
FR2301605A1 (fr) Procede de production
FR2290491A1 (fr) Predetachant de blanchissage et procede de production
FR2288730A1 (fr) Procede de production du diacetoxybutane et du butanediol
BE801730A (fr) Procede de preparation de bioxyde de chrome ameliore et bioxyde de chrome ainsi obtenu
BE828887A (fr) Procede de production de bioxyde de chrome ferromagnetique et bioxyde de chrome ainsi obtenu
BE824736A (fr) Procede de production de rutile synthetique
BR7603890A (pt) Processo aperfeicoado para producao de carvao ativado granular e carvao ativado granular produzido pelo dito processo
BE843350A (fr) Procede de fabrication de dispersions polyacetovinyliques et dispersions ainsi obtenues
BE836214A (fr) Procede de production d'hydroxyphenylacetonitriles
IT7948446A0 (it) 3-fluorobenzodiazepine e procedimento per la loro produzione
AT311923B (de) Verfahren zur Herstellung von ferromagnetischem Chromdioxyd
FR2277499A1 (fr) Procede pour la production de photomasques colores
FR2278764A1 (fr) Procede de production de l-lysine
BE846708A (fr) Procede de production d'un alcane-polyol
FR2321485A1 (fr) Procede de production de trifluoromethyl-aminobenzonitriles
FR2274614A1 (fr) Procede de production de 5-aroyl-pyrroles
CH545252A (de) Verfahren zur Herstellung von ferromagnetischem Chromdioxid
FR2286796A1 (fr) Procede de production de ferri-oxyde g
BR7603871A (pt) Processo para producao de polimisturas polimericas
SE7611815L (sv) Forfarande for framstellning av ferromagnetisk kromdioxid
FR2302294A1 (fr) Procede de production de o-derives de p-isopropenylphenol
BE827353A (fr) Procede de production de l'acetone
FR2336395A1 (fr) Procede de production de pyrazolones
IT1061404B (it) Procedimento per la produzione cicloalcanoni e cicloalcanoli e prodotto ottenuto