IT1028343B - PROCEDURE FOR THE PREPARATION OF ACICULAR FERRIC OXIDE MAGNETIC IRONS - Google Patents

PROCEDURE FOR THE PREPARATION OF ACICULAR FERRIC OXIDE MAGNETIC IRONS

Info

Publication number
IT1028343B
IT1028343B IT1923875A IT1923875A IT1028343B IT 1028343 B IT1028343 B IT 1028343B IT 1923875 A IT1923875 A IT 1923875A IT 1923875 A IT1923875 A IT 1923875A IT 1028343 B IT1028343 B IT 1028343B
Authority
IT
Italy
Prior art keywords
procedure
preparation
ferric oxide
oxide magnetic
magnetic irons
Prior art date
Application number
IT1923875A
Other languages
Italian (it)
Inventor
G Fagherazzi
G Sironi
F Ferrero
B Viviani
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
Priority to IT1923875A priority Critical patent/IT1028343B/en
Priority to DE19752559248 priority patent/DE2559248A1/en
Priority to NL7600190A priority patent/NL7600190A/en
Priority to FR7600553A priority patent/FR2297813A1/en
Priority to GB124976A priority patent/GB1531051A/en
Priority to US05/723,303 priority patent/US4096292A/en
Application granted granted Critical
Publication of IT1028343B publication Critical patent/IT1028343B/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
IT1923875A 1975-01-14 1975-01-14 PROCEDURE FOR THE PREPARATION OF ACICULAR FERRIC OXIDE MAGNETIC IRONS IT1028343B (en)

Priority Applications (6)

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
DE19752559248 DE2559248A1 (en) 1975-01-14 1975-12-31 FROM LUNKER- AND BUBBLE INCLUSIONS FREE NEEDLE-SHAPED FERRIMAGNETIC GAMMA-IRON (III) OXYDE PARTICLES, AT THE SAME TIME HAVING SUPERIOR RESISTANCE, AND A METHOD FOR PRODUCING THE SAME
NL7600190A NL7600190A (en) 1975-01-14 1976-01-09 PROCESS FOR PREPARING FERROMAGNETIC NEEDLE-SHAPED IRON OXIDE.
FR7600553A FR2297813A1 (en) 1975-01-14 1976-01-12 PROCESS FOR PREPARING A FERRIC OXIDE
GB124976A GB1531051A (en) 1975-01-14 1976-01-13 Ferromagnetic acicular ferric oxide
US05/723,303 US4096292A (en) 1975-01-14 1976-09-14 Process for preparing ferrimagnetic acicular ferric oxide

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
IT1028343B true IT1028343B (en) 1979-01-30

Family

ID=11156013

Family Applications (1)

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

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)

Families Citing this family (7)

* 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
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 (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

Also Published As

Publication number Publication date
DE2559248A1 (en) 1976-07-15
NL7600190A (en) 1976-07-16
FR2297813A1 (en) 1976-08-13
GB1531051A (en) 1978-11-01
FR2297813B1 (en) 1981-05-22

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