GB1531051A - Ferromagnetic acicular ferric oxide - Google Patents

Ferromagnetic acicular ferric oxide

Info

Publication number
GB1531051A
GB1531051A GB124976A GB124976A GB1531051A GB 1531051 A GB1531051 A GB 1531051A GB 124976 A GB124976 A GB 124976A GB 124976 A GB124976 A GB 124976A GB 1531051 A GB1531051 A GB 1531051A
Authority
GB
United Kingdom
Prior art keywords
feo
air
jan
sio
steam
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
GB124976A
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
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 GB1531051A publication Critical patent/GB1531051A/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
    • G11B5/70642—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)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Compounds Of Iron (AREA)
GB124976A 1975-01-14 1976-01-13 Ferromagnetic acicular ferric oxide Expired GB1531051A (en)

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
GB1531051A true GB1531051A (en) 1978-11-01

Family

ID=11156013

Family Applications (1)

Application Number Title Priority Date Filing Date
GB124976A Expired GB1531051A (en) 1975-01-14 1976-01-13 Ferromagnetic acicular ferric oxide

Country Status (5)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214195A (en) * 1988-01-18 1989-08-31 Inco Ltd System for coating particles employing a pneumatic transport reactor

Families Citing this family (6)

* 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
JPS5677931A (en) * 1979-11-28 1981-06-26 Tdk Corp Magnetic recording medium and its producton
JPS5676510A (en) * 1979-11-28 1981-06-24 Tdk Corp Manufacture of magnetic recording material
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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2214195A (en) * 1988-01-18 1989-08-31 Inco Ltd System for coating particles employing a pneumatic transport reactor
US4936250A (en) * 1988-01-18 1990-06-26 Inco Limited System for coating particles employing a pneumatic transport reactor

Also Published As

Publication number Publication date
FR2297813B1 (enrdf_load_stackoverflow) 1981-05-22
NL7600190A (nl) 1976-07-16
IT1028343B (it) 1979-01-30
DE2559248A1 (de) 1976-07-15
FR2297813A1 (fr) 1976-08-13

Similar Documents

Publication Publication Date Title
GB1436090A (en) Magnetic iron oxides with orientability and a process for their production
GB1524608A (en) Controlling scale formation in aqueous media
PL87763B1 (enrdf_load_stackoverflow)
GB1531051A (en) Ferromagnetic acicular ferric oxide
US3843773A (en) Process for producing fine acicular gamma ferric oxide crystals
JPH0448732B2 (enrdf_load_stackoverflow)
CA2119145A1 (en) Ferrite particles and therapeutic and diagnostic uses therefore
US4561988A (en) Process for production of plate-like barium ferrite particles for magnetic recording
JPS57124356A (en) Binary magnetic developer
EP0279626B1 (en) Plate-like magnetite particles, plate-like maghemite particles and process for producing the same
GB1441183A (en) Magnetic recording particles
JPS6122428A (ja) 鉄磁性顔料の製造と使用
IE36177L (en) Ferric oxide
US3873462A (en) Cobalt modified iron oxides
GB1458623A (en) Production of acicular cobalt-containing ferri-magnetic iron oxides
US4876022A (en) Method for preparing ferromagnetic iron oxide particles
JPS5669229A (en) Preparation of hydrous iron oxide
GB1486961A (en) Preparation of magnetite of a controlled particle size
JPS57198607A (en) Manufacture of magnetic iron oxide particle powder for magnetic recording material
IE33599L (en) Iron oxide process
JPS54130499A (en) Production of needle-like goethite
JPS5678430A (en) Production of iron compound particle for magnetic recording
JPS5556019A (en) Production of ferromagnetic powder
US4255409A (en) Process for producing acicular goethite
JPS5788036A (en) Manufacture of iron oxide pigment

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee