BE857302A - Procede de preparation de bioxyde de chrome ferromagnetique - Google Patents

Procede de preparation de bioxyde de chrome ferromagnetique

Info

Publication number
BE857302A
BE857302A BE179762A BE179762A BE857302A BE 857302 A BE857302 A BE 857302A BE 179762 A BE179762 A BE 179762A BE 179762 A BE179762 A BE 179762A BE 857302 A BE857302 A BE 857302A
Authority
BE
Belgium
Prior art keywords
bioxide
preparing ferromagnetic
chrome
ferromagnetic chrome
preparing
Prior art date
Application number
BE179762A
Other languages
English (en)
Original Assignee
Du Pont
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 Du Pont filed Critical Du Pont
Publication of BE857302A publication Critical patent/BE857302A/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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Hard Magnetic Materials (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Compounds Of Iron (AREA)
BE179762A 1976-08-31 1977-06-29 Procede de preparation de bioxyde de chrome ferromagnetique BE857302A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/719,167 US4045544A (en) 1976-08-31 1976-08-31 Process for the preparation of ferromagnetic chromium dioxide

Publications (1)

Publication Number Publication Date
BE857302A true BE857302A (fr) 1978-01-30

Family

ID=24889010

Family Applications (1)

Application Number Title Priority Date Filing Date
BE179762A BE857302A (fr) 1976-08-31 1977-06-29 Procede de preparation de bioxyde de chrome ferromagnetique

Country Status (8)

Country Link
US (1) US4045544A (fr)
JP (1) JPS609323B2 (fr)
BE (1) BE857302A (fr)
CA (1) CA1091919A (fr)
DE (1) DE2727891C3 (fr)
FR (1) FR2363520A1 (fr)
GB (1) GB1556929A (fr)
NL (1) NL178311C (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495246A (en) * 1983-10-27 1985-01-22 Basf Aktiengesellschaft Acicular ferromagnetic chromium dioxide particles
DE3609971A1 (de) * 1986-03-25 1987-10-01 Basf Ag Verfahren zur herstellung von chrom(iii)oxid, eine vorrichtung zur durchfuehrung des verfahrens sowie die verwendung des chrom(iii)oxids als ausgangsmaterial fuer die chromdioxid-synthese
US4698220A (en) * 1986-03-28 1987-10-06 E. I. Du Pont De Nemours And Company Partitioned reduction process for ferromagnetic chromium dioxide
US4747974A (en) * 1986-03-28 1988-05-31 E. I. Dupont De Nemours And Company Mixed Cr2 O3 paste for CrO2 synthesis
US4769165A (en) * 1987-01-20 1988-09-06 E. I. Du Pont De Nemours And Company Process for synthesis of ferromagnetic chromium dioxide
DE3819779A1 (de) * 1988-06-10 1989-12-21 Bayer Ag Verbessertes chromoxidgruen, verfahren zu seiner herstellung und dessen verwendung
EP0546342B1 (fr) * 1991-11-14 1996-08-14 Matsushita Electric Industrial Co., Ltd. Matériau fonctionnel auto-métabolisant

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956955A (en) * 1960-02-12 1960-10-18 Du Pont Ferromagnetic chromium oxide and method of making
US3278263A (en) * 1964-11-27 1966-10-11 Du Pont Ferromagnetic chromium dioxide and preparation thereof
JPS5021992B1 (fr) * 1968-02-17 1975-07-26
JPS4828277B1 (fr) * 1970-12-14 1973-08-30

Also Published As

Publication number Publication date
DE2727891A1 (de) 1978-03-02
DE2727891B2 (de) 1980-04-24
FR2363520B1 (fr) 1981-07-24
DE2727891C3 (de) 1980-12-11
NL178311C (nl) 1986-03-03
NL178311B (nl) 1985-10-01
GB1556929A (en) 1979-12-05
CA1091919A (fr) 1980-12-23
JPS5329598A (en) 1978-03-18
NL7708419A (nl) 1978-03-02
JPS609323B2 (ja) 1985-03-09
US4045544A (en) 1977-08-30
FR2363520A1 (fr) 1978-03-31

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: E.I. DU PONT DE NEMOURS AND CY

Effective date: 19930731