NL7600190A - PROCESS FOR PREPARING FERROMAGNETIC NEEDLE-SHAPED IRON OXIDE. - Google Patents

PROCESS FOR PREPARING FERROMAGNETIC NEEDLE-SHAPED IRON OXIDE.

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
Dutch (nl)
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/en

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 PROCESS FOR PREPARING FERROMAGNETIC NEEDLE-SHAPED IRON OXIDE. NL7600190A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1923875A IT1028343B (en) 1975-01-14 1975-01-14 PROCEDURE FOR THE PREPARATION OF ACICULAR FERRIC OXIDE MAGNETIC IRONS

Publications (1)

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

Family

ID=11156013

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7600190A NL7600190A (en) 1975-01-14 1976-01-09 PROCESS FOR PREPARING FERROMAGNETIC NEEDLE-SHAPED IRON OXIDE.

Country Status (5)

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

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 (en) * 1976-07-27 1983-01-13 Bayer Ag, 5090 Leverkusen Process for the production of acicular to prism-shaped ferrimagnetic iron oxide pigments for magnetic signal recording
DE2744887A1 (en) * 1977-10-06 1979-04-19 Basf Ag PROCESS FOR MANUFACTURING AGGLOMERATE-FREE GAMMA IRON (III) OXIDE
DE2805621A1 (en) * 1978-02-10 1979-08-23 Basf Ag PROCESS FOR THE PRODUCTION OF NEEDLE-SHAPED FERRIMAGNETIC IRON OXIDES
AT382142B (en) * 1984-12-17 1987-01-12 Ruthner Michael Johann Dipl In METHOD AND DEVICE FOR PRODUCING CERAMIC POWDERS BASED ON ONE AND / OR MULTI-COMPONENT METAL OXIDS, AND MIXTURES THEREOF
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 (en) 1979-01-30
GB1531051A (en) 1978-11-01
FR2297813A1 (en) 1976-08-13
DE2559248A1 (en) 1976-07-15
FR2297813B1 (en) 1981-05-22

Similar Documents

Publication Publication Date Title
NL7605915A (en) PROCESS FOR PREPARING POLYPHENYLENE OXIDES.
NL7505666A (en) PROCESS FOR PREPARING STABLE DISPERSIONS.
NL7605831A (en) PROCESS FOR PREPARING POLYKETONES.
NL7602200A (en) PROCESS FOR PREPARING TITANIOXIDE DIGMENTS.
NL7803460A (en) PROCESS FOR MANUFACTURE OF NEEDLE-SHAPED FERROMAGNETIC IRON PARTICLES.
NL7613773A (en) PROCESS FOR PREPARING ALIPHATIC NITRILES.
NL7601988A (en) PROCESS FOR THE PREPARATION OF ALKEN OXIDES.
NL7607400A (en) PROCESS FOR PREPARING ALKALI-ALUMINIUM-ZEOLITIC SILICATES.
NL7611409A (en) PROCESS FOR PREPARING NEW PHENOXYAL KYLCARBON ACIDS.
NL188409C (en) PROCESS FOR PREPARING DIHYDRO-OXADIAZINONES.
NL7515228A (en) PROCESS FOR PREPARING POLYHYDRICAL ALCO- HOLES.
NL7600190A (en) PROCESS FOR PREPARING FERROMAGNETIC NEEDLE-SHAPED IRON OXIDE.
JPS51124699A (en) Process for preparing iron oxide
NL7601606A (en) PROCESS FOR PREPARING VANADIUMSUBOXIDES.
NL7611694A (en) PROCESS FOR PREPARING 3-HYDROXY 3-CEFE-MESTER-SULFOXIDES.
NL187392C (en) PROCESS FOR PREPARING 4-CHLOROUS-ALFA-ISOPROPYLBENZYLCYANIDE.
NL7605207A (en) PROCESS FOR PREPARING 2-ARYL-2H-BENZO-TRIAZOLES.
NL7604744A (en) PROCESS FOR PREPARING L (+) - TARTARIC ACID.
NL7515230A (en) PROCESS FOR PREPARING POLYHYDRICAL ALCO- HOLES.
NL7613222A (en) PROCESS FOR PREPARING ETHYLCHLOROTHIOFORMIATE.
NL7603994A (en) PROCESS FOR PREPARING COPOLY ESTERAMIDES.
NL7612147A (en) PROCESS FOR PREPARING PINACOLS.
NL7607004A (en) PROCESS FOR PREPARING INDOLOCHINOLIZINS.
NL7613183A (en) PROCESS FOR PREPARING TETRAHYDROFURAN.
NL7612630A (en) PROCESS FOR PREPARING STABLE DISPERSIONS.

Legal Events

Date Code Title Description
BV The patent application has lapsed