NL7600190A - Werkwijze ter bereiding van ferromagnetisch naaldvormig ijzeroxyde. - Google Patents

Werkwijze ter bereiding van ferromagnetisch naaldvormig ijzeroxyde.

Info

Publication number
NL7600190A
NL7600190A NL7600190A NL7600190A NL7600190A NL 7600190 A NL7600190 A NL 7600190A NL 7600190 A NL7600190 A NL 7600190A NL 7600190 A NL7600190 A NL 7600190A NL 7600190 A NL7600190 A NL 7600190A
Authority
NL
Netherlands
Prior art keywords
iron oxide
shaped iron
ferromagnetic needle
preparing ferromagnetic
preparing
Prior art date
Application number
NL7600190A
Other languages
English (en)
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 NL7600190A publication Critical patent/NL7600190A/nl

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
    • G11B5/70663—Preparation processes specially adapted therefor, e.g. using stabilising agents
    • 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
    • G11B5/70652—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
    • G11B5/70657—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 with a skin
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/01—Particle morphology depicted by an image
    • C01P2004/03—Particle morphology depicted by an image obtained by SEM
    • 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
    • C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
    • C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
    • C01P2004/84—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases one phase coated with the other
    • C01P2004/86—Thin layer coatings, i.e. the coating thickness being less than 0.1 time the particle radius
    • 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)
  • Compounds Of Iron (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
NL7600190A 1975-01-14 1976-01-09 Werkwijze ter bereiding van ferromagnetisch naaldvormig ijzeroxyde. NL7600190A (nl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1923875A IT1028343B (it) 1975-01-14 1975-01-14 Procedimento per la preparazione di ossido ferrico aciculare ferri magnetico

Publications (1)

Publication Number Publication Date
NL7600190A true NL7600190A (nl) 1976-07-16

Family

ID=11156013

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7600190A NL7600190A (nl) 1975-01-14 1976-01-09 Werkwijze ter bereiding van ferromagnetisch naaldvormig ijzeroxyde.

Country Status (5)

Country Link
DE (1) DE2559248A1 (nl)
FR (1) FR2297813A1 (nl)
GB (1) GB1531051A (nl)
IT (1) IT1028343B (nl)
NL (1) NL7600190A (nl)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309459A (en) * 1979-11-28 1982-01-05 Tdk Electronics Co., Ltd. Process for producing SiO2 coated iron oxide powder for use in the preparation of acicular magnetic iron or iron oxide powder
US4347291A (en) * 1979-11-28 1982-08-31 Tdk Electronics Co., Ltd. Magnetic recording medium and preparation thereof

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2633597C2 (de) * 1976-07-27 1983-01-13 Bayer Ag, 5090 Leverkusen Verfahren zur Herstellung von nadel- bis prismenförmigen ferrimagnetischen Eisenoxidpigmenten zur magnetischen Signalaufzeichnung
DE2744887A1 (de) * 1977-10-06 1979-04-19 Basf Ag Verfahren zur herstellung von agglomeratfreiem gamma-eisen(iii)oxid
DE2805621A1 (de) * 1978-02-10 1979-08-23 Basf Ag Verfahren zur herstellung von nadelfoermigen, ferrimagnetischen eisenoxiden
AT382142B (de) * 1984-12-17 1987-01-12 Ruthner Michael Johann Dipl In Verfahren und vorrichtung zur herstellung von keramischen pulvern auf der basis von einund/oder mehrkomponentigen metalloxiden, sowie von deren gemischen
CA1304572C (en) * 1988-01-18 1992-07-07 Leonard George Wiseman System for coating particles employing a pneumatic transport reactor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309459A (en) * 1979-11-28 1982-01-05 Tdk Electronics Co., Ltd. Process for producing SiO2 coated iron oxide powder for use in the preparation of acicular magnetic iron or iron oxide powder
US4347291A (en) * 1979-11-28 1982-08-31 Tdk Electronics Co., Ltd. Magnetic recording medium and preparation thereof

Also Published As

Publication number Publication date
IT1028343B (it) 1979-01-30
GB1531051A (en) 1978-11-01
FR2297813A1 (fr) 1976-08-13
DE2559248A1 (de) 1976-07-15
FR2297813B1 (nl) 1981-05-22

Similar Documents

Publication Publication Date Title
NL7605915A (nl) Werkwijze ter bereiding van polyfenyleenoxiden.
NL7505666A (nl) Werkwijze ter bereiding van stabiele dispersies.
NL7605831A (nl) Werkwijze ter bereiding van polyketonen.
NL7602200A (nl) Werkwijze ter bereiding van titaandioxydepigmen- ten.
NL7803460A (nl) Werkwijze ter vervaardiging van naaldvormige, ferromagnetische ijzerdeeltjes.
NL7613773A (nl) Werkwijze ter bereiding van alifatische nitrilen.
NL7601988A (nl) Werkwijze ter bereiding van alkeenoxyden.
NL7607400A (nl) Werkwijze ter bereiding van zeolitische alkali- -aluminiumsilicaten.
NL7611409A (nl) Werkwijze ter bereiding van nieuwe fenoxyal- kylcarbonzuren.
NL188409C (nl) Werkwijze ter bereiding van dihydro-oxadiazinonen.
NL7515228A (nl) Werkwijze ter bereiding van polyhydrische alco- holen.
NL7600190A (nl) Werkwijze ter bereiding van ferromagnetisch naaldvormig ijzeroxyde.
JPS51124699A (en) Process for preparing iron oxide
NL7601606A (nl) Werkwijze ter bereiding van vanadiumsuboxyden.
NL7611694A (nl) Werkwijze ter bereiding van 3-hydroxy 3-cefe- mester-sulfoxiden.
NL187392C (nl) Werkwijze ter bereiding van 4-chloor-alfa-isopropylbenzylcyanide.
NL7605207A (nl) Werkwijze ter bereiding van 2-aryl-2h-benzo- triazolen.
NL7604744A (nl) Werkwijze ter bereiding van l(+)-wijnsteenzuur.
NL7515230A (nl) Werkwijze ter bereiding van polyhydrische alco- holen.
NL7613222A (nl) Werkwijze ter bereiding van ethylchloorthiofor- miaat.
NL7603994A (nl) Werkwijze ter bereiding van copoly-esteramiden.
NL7612147A (nl) Werkwijze ter bereiding van pinacolen.
NL7607004A (nl) Werkwijze ter bereiding van indolochinolizinen.
NL7613183A (nl) Werkwijze ter bereiding van tetrahydrofuran.
NL7612630A (nl) Werkwijze ter bereiding van stabiele dispersies.

Legal Events

Date Code Title Description
BV The patent application has lapsed