GB1343622A - Method for the preparation of ferromagnetic chromium dioxide - Google Patents

Method for the preparation of ferromagnetic chromium dioxide

Info

Publication number
GB1343622A
GB1343622A GB2875071A GB2875071A GB1343622A GB 1343622 A GB1343622 A GB 1343622A GB 2875071 A GB2875071 A GB 2875071A GB 2875071 A GB2875071 A GB 2875071A GB 1343622 A GB1343622 A GB 1343622A
Authority
GB
United Kingdom
Prior art keywords
chromium
metal
ferromagnetic
preparation
chromium dioxide
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.)
Expired
Application number
GB2875071A
Other languages
English (en)
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
Application filed by Montedison SpA, Montecatini Edison SpA filed Critical Montedison SpA
Publication of GB1343622A publication Critical patent/GB1343622A/en
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
    • 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
    • C01P2004/61—Micrometer sized, i.e. from 1-100 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
    • C01P2004/62—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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)
  • Soft Magnetic Materials (AREA)
  • Magnetic Record Carriers (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
GB2875071A 1970-06-23 1971-06-18 Method for the preparation of ferromagnetic chromium dioxide Expired GB1343622A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2641270 1970-06-23

Publications (1)

Publication Number Publication Date
GB1343622A true GB1343622A (en) 1974-01-16

Family

ID=11219419

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2875071A Expired GB1343622A (en) 1970-06-23 1971-06-18 Method for the preparation of ferromagnetic chromium dioxide

Country Status (8)

Country Link
BE (1) BE768910A (enExample)
CA (1) CA947041A (enExample)
DE (1) DE2130547A1 (enExample)
ES (1) ES392394A1 (enExample)
FR (1) FR2096427B1 (enExample)
GB (1) GB1343622A (enExample)
NL (1) NL7108266A (enExample)
SE (1) SE369184B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004020338A3 (en) * 2002-08-29 2004-08-12 Tata Inst Of Fundamental Res 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004020338A3 (en) * 2002-08-29 2004-08-12 Tata Inst Of Fundamental Res 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

Also Published As

Publication number Publication date
FR2096427B1 (enExample) 1974-03-08
ES392394A1 (es) 1973-08-01
NL7108266A (enExample) 1971-12-27
FR2096427A1 (enExample) 1972-02-18
BE768910A (fr) 1971-12-23
DE2130547A1 (de) 1971-12-30
CA947041A (en) 1974-05-14
SE369184B (enExample) 1974-08-12

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees