FR2185840A1 - - Google Patents

Info

Publication number
FR2185840A1
FR2185840A1 FR7318369A FR7318369A FR2185840A1 FR 2185840 A1 FR2185840 A1 FR 2185840A1 FR 7318369 A FR7318369 A FR 7318369A FR 7318369 A FR7318369 A FR 7318369A FR 2185840 A1 FR2185840 A1 FR 2185840A1
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.)
Granted
Application number
FR7318369A
Other languages
French (fr)
Other versions
FR2185840B1 (he
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
Montecatini Edison 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
Priority claimed from IT2477372A external-priority patent/IT955797B/it
Priority claimed from IT2139873A external-priority patent/IT1045821B/it
Application filed by Montedison SpA, Montecatini Edison SpA filed Critical Montedison SpA
Publication of FR2185840A1 publication Critical patent/FR2185840A1/fr
Application granted granted Critical
Publication of FR2185840B1 publication Critical patent/FR2185840B1/fr
Expired 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
    • 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
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Hard Magnetic Materials (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
FR7318369A 1972-05-24 1973-05-21 Expired FR2185840B1 (he)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2477372A IT955797B (it) 1972-05-24 1972-05-24 Biossido di cromo stabilizzato
IT2139873A IT1045821B (it) 1973-03-09 1973-03-09 Biossido di cromo stabilizzato

Publications (2)

Publication Number Publication Date
FR2185840A1 true FR2185840A1 (he) 1974-01-04
FR2185840B1 FR2185840B1 (he) 1976-06-11

Family

ID=26327886

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7318369A Expired FR2185840B1 (he) 1972-05-24 1973-05-21

Country Status (8)

Country Link
JP (1) JPS4949898A (he)
CA (1) CA1013130A (he)
CH (1) CH604343A5 (he)
DE (1) DE2325719A1 (he)
FR (1) FR2185840B1 (he)
GB (1) GB1435392A (he)
NL (1) NL7306877A (he)
SE (1) SE404274B (he)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2386486A1 (fr) * 1977-04-07 1978-11-03 Montedison Spa Bioxyde de chrome ferromagnetique stabilise et son procede de preparation
EP0055994A2 (en) * 1981-01-06 1982-07-14 Koninklijke Philips Electronics N.V. Magnetic recording element and method of manufacturing same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55132005A (en) * 1979-04-02 1980-10-14 Ken Namikawa Ferromagnetic powder and manufacture therefor
US4382982A (en) * 1979-12-07 1983-05-10 Ici Australia Limited Process for protecting magnetic particles with chromium oxide
DE3610411A1 (de) * 1986-03-27 1987-10-01 Basf Ag Verfahren zur stabilisierung von nadelfoermigem ferromagnetischem chromdioxid

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686031A (en) * 1969-11-26 1972-08-22 Du Pont Metal phosphate coated ferromagnetic chromium oxide and its preparation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686031A (en) * 1969-11-26 1972-08-22 Du Pont Metal phosphate coated ferromagnetic chromium oxide and its preparation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2386486A1 (fr) * 1977-04-07 1978-11-03 Montedison Spa Bioxyde de chrome ferromagnetique stabilise et son procede de preparation
EP0055994A2 (en) * 1981-01-06 1982-07-14 Koninklijke Philips Electronics N.V. Magnetic recording element and method of manufacturing same
EP0055994A3 (en) * 1981-01-06 1982-08-04 N.V. Philips' Gloeilampenfabrieken Magnetic recording element and method of manufacturing same

Also Published As

Publication number Publication date
CH604343A5 (he) 1978-09-15
SE404274B (sv) 1978-09-25
DE2325719A1 (de) 1973-12-13
JPS4949898A (he) 1974-05-15
CA1013130A (en) 1977-07-05
GB1435392A (en) 1976-05-12
FR2185840B1 (he) 1976-06-11
NL7306877A (he) 1973-11-27

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Legal Events

Date Code Title Description
ST Notification of lapse