NL181099C - Werkwijze ter bereiding van aciculair gamma-ijzer(iii)oxyde, alsmede magnetische registratiedragers, geheel of gedeeltelijk voorzien van een laag ijzeroxyde, verkregen met behulp van deze werkwijze. - Google Patents

Werkwijze ter bereiding van aciculair gamma-ijzer(iii)oxyde, alsmede magnetische registratiedragers, geheel of gedeeltelijk voorzien van een laag ijzeroxyde, verkregen met behulp van deze werkwijze.

Info

Publication number
NL181099C
NL181099C NL7413657A NL7413657A NL181099C NL 181099 C NL181099 C NL 181099C NL 7413657 A NL7413657 A NL 7413657A NL 7413657 A NL7413657 A NL 7413657A NL 181099 C NL181099 C NL 181099C
Authority
NL
Netherlands
Prior art keywords
oxide
bearers
iii
partially provided
iron
Prior art date
Application number
NL7413657A
Other languages
English (en)
Dutch (nl)
Other versions
NL181099B (nl
NL7413657A (nl
Original Assignee
Basf Ag
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 Basf Ag filed Critical Basf Ag
Publication of NL7413657A publication Critical patent/NL7413657A/xx
Publication of NL181099B publication Critical patent/NL181099B/xx
Application granted granted Critical
Publication of NL181099C publication Critical patent/NL181099C/xx

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
    • G11B5/70642—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 iron oxides
    • G11B5/70652—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 iron oxides gamma - Fe2 O3
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/02—Oxides; Hydroxides
    • C01G49/06—Ferric oxide [Fe2O3]
    • 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
    • G11B5/70642—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 iron oxides
    • G11B5/70647—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 iron oxides with a skin
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/50—Solid solutions
    • C01P2002/52—Solid solutions containing elements as dopants
    • C01P2002/54—Solid solutions containing elements as dopants one element only
    • 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
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Dermatology (AREA)
  • General Health & Medical Sciences (AREA)
  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
NL7413657A 1973-10-19 1974-10-17 Werkwijze ter bereiding van aciculair gamma-ijzer(iii)oxyde, alsmede magnetische registratiedragers, geheel of gedeeltelijk voorzien van een laag ijzeroxyde, verkregen met behulp van deze werkwijze. NL181099C (nl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732352440 DE2352440C2 (de) 1973-10-19 1973-10-19 Verfahren zur Herstellung von γ- Eisen(III)oxid

Publications (3)

Publication Number Publication Date
NL7413657A NL7413657A (nl) 1975-04-22
NL181099B NL181099B (nl) 1987-01-16
NL181099C true NL181099C (nl) 1987-06-16

Family

ID=5895848

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7413657A NL181099C (nl) 1973-10-19 1974-10-17 Werkwijze ter bereiding van aciculair gamma-ijzer(iii)oxyde, alsmede magnetische registratiedragers, geheel of gedeeltelijk voorzien van een laag ijzeroxyde, verkregen met behulp van deze werkwijze.

Country Status (4)

Country Link
JP (1) JPS5719057B2 (xx)
DE (1) DE2352440C2 (xx)
GB (1) GB1482162A (xx)
NL (1) NL181099C (xx)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT345252B (de) * 1975-10-31 1978-09-11 Unibra Sa Verfahren zur herstellung von magnetoxiden
DE2903593C3 (de) * 1979-01-31 1982-05-06 Bayer Ag, 5090 Leverkusen Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1250803B (de) * 1964-01-30 1967-09-28 Eastman Kodak Company, Rochester, N.Y. (V. St. A.) Verfahren zur Herstellung von y-FeaOs

Also Published As

Publication number Publication date
DE2352440C2 (de) 1983-11-03
JPS50112300A (xx) 1975-09-03
NL181099B (nl) 1987-01-16
DE2352440A1 (de) 1975-04-30
NL7413657A (nl) 1975-04-22
JPS5719057B2 (xx) 1982-04-20
GB1482162A (en) 1977-08-10

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Legal Events

Date Code Title Description
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
A85 Still pending on 85-01-01
V1 Lapsed because of non-payment of the annual fee