DE2319572A1 - Modifiziertes ferromagnetisches chromdioxid enthaltendes gemisch und verfahren zu dessen herstellung - Google Patents

Modifiziertes ferromagnetisches chromdioxid enthaltendes gemisch und verfahren zu dessen herstellung

Info

Publication number
DE2319572A1
DE2319572A1 DE2319572A DE2319572A DE2319572A1 DE 2319572 A1 DE2319572 A1 DE 2319572A1 DE 2319572 A DE2319572 A DE 2319572A DE 2319572 A DE2319572 A DE 2319572A DE 2319572 A1 DE2319572 A1 DE 2319572A1
Authority
DE
Germany
Prior art keywords
chromium
chromate
iii
mixture
elements
Prior art date
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.)
Pending
Application number
DE2319572A
Other languages
German (de)
English (en)
Inventor
Pierfrancesco Aspes
Giampiero Basile
Ugo Montiglio
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 DE2319572A1 publication Critical patent/DE2319572A1/de
Pending 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
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/74—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by peak-intensities or a ratio thereof only
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
    • C01P2002/82—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by IR- or Raman-data
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
    • 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
    • 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
    • C01P2006/82—Compositional purity water content

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)
DE2319572A 1972-04-22 1973-04-18 Modifiziertes ferromagnetisches chromdioxid enthaltendes gemisch und verfahren zu dessen herstellung Pending DE2319572A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT23466/72A IT956230B (it) 1972-04-22 1972-04-22 Composizione di biossido di cromo ferromagnetico modificato e p oces so di preparazione

Publications (1)

Publication Number Publication Date
DE2319572A1 true DE2319572A1 (de) 1973-10-31

Family

ID=11207341

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2319572A Pending DE2319572A1 (de) 1972-04-22 1973-04-18 Modifiziertes ferromagnetisches chromdioxid enthaltendes gemisch und verfahren zu dessen herstellung

Country Status (17)

Country Link
US (1) US3874923A (enExample)
JP (1) JPS5216718B2 (enExample)
AT (1) AT340369B (enExample)
AU (1) AU469323B2 (enExample)
BE (1) BE798513A (enExample)
CA (1) CA998240A (enExample)
CS (1) CS177128B2 (enExample)
DD (1) DD104068A5 (enExample)
DE (1) DE2319572A1 (enExample)
ES (1) ES413927A1 (enExample)
FR (1) FR2181888B1 (enExample)
GB (1) GB1426526A (enExample)
IT (1) IT956230B (enExample)
NL (1) NL158960C (enExample)
SE (1) SE389422B (enExample)
SU (1) SU618032A3 (enExample)
ZA (1) ZA732605B (enExample)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4128691A (en) * 1974-02-21 1978-12-05 Fuji Photo Film Co., Ltd. Process for the production of a magnetic recording medium
IT1012202B (it) * 1974-05-09 1977-03-10 Montedison Spa Procedimento per la produzione di biossido di cromo ferromagnetico
IT1045191B (it) * 1975-10-31 1980-05-10 Montedison Spa Procedimento per la produzione di biossido di cromo ferromagnetico
JPS54135416A (en) * 1978-04-12 1979-10-20 Kuninori Maruyama Portion material for roof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1467328B2 (de) * 1963-07-24 1971-06-16 Farbenfabriken Bayer AG, 5090 Le verkusen Ferromagnetisches modifiziertes chromdioxid
DE1771867B1 (de) * 1968-02-23 1972-02-03 Matsushita Electric Ind Co Ltd Tellur calcium modifiziertes chromdioxid
GB1312812A (en) * 1969-06-20 1973-04-11 Nippon Chemical Ind Process for preparing magnetic chromium dioxide
JPS4843436B1 (enExample) * 1970-10-20 1973-12-18

Also Published As

Publication number Publication date
AU469323B2 (en) 1976-02-12
AU5455773A (en) 1974-10-17
DD104068A5 (enExample) 1974-02-20
SE389422B (sv) 1976-11-01
JPS4961089A (enExample) 1974-06-13
SU618032A3 (ru) 1978-07-30
AT340369B (de) 1977-12-12
FR2181888B1 (enExample) 1976-11-12
NL158960C (enExample) 1979-05-15
ES413927A1 (es) 1976-02-01
JPS5216718B2 (enExample) 1977-05-11
CS177128B2 (enExample) 1977-07-29
ZA732605B (en) 1974-03-27
IT956230B (it) 1973-10-10
CA998240A (en) 1976-10-12
GB1426526A (en) 1976-03-03
FR2181888A1 (enExample) 1973-12-07
BE798513A (fr) 1973-10-22
ATA353173A (de) 1977-04-15
NL7305188A (enExample) 1973-10-24
US3874923A (en) 1975-04-01

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