DE1771327B1 - Verfahren zur herstellung von magnetischemx gamma fe tief 2 o tief 3 aus alpha ferrioxid oder hydratisiertem alpha ferrioxyd - Google Patents

Verfahren zur herstellung von magnetischemx gamma fe tief 2 o tief 3 aus alpha ferrioxid oder hydratisiertem alpha ferrioxyd

Info

Publication number
DE1771327B1
DE1771327B1 DE19681771327 DE1771327A DE1771327B1 DE 1771327 B1 DE1771327 B1 DE 1771327B1 DE 19681771327 DE19681771327 DE 19681771327 DE 1771327 A DE1771327 A DE 1771327A DE 1771327 B1 DE1771327 B1 DE 1771327B1
Authority
DE
Germany
Prior art keywords
oxide
ferric oxide
magnetic
particles
hydrated
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.)
Withdrawn
Application number
DE19681771327
Other languages
German (de)
English (en)
Inventor
Greiner Henry Sandt
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.)
PFIZER
Original Assignee
PFIZER
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 PFIZER filed Critical PFIZER
Publication of DE1771327B1 publication Critical patent/DE1771327B1/de
Withdrawn legal-status Critical Current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
    • G11B5/70647—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
    • 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
    • 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
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • 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
    • C01P2006/10—Solid density
    • 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)
  • Paints Or Removers (AREA)
  • Compounds Of Iron (AREA)
DE19681771327 1967-05-18 1968-05-08 Verfahren zur herstellung von magnetischemx gamma fe tief 2 o tief 3 aus alpha ferrioxid oder hydratisiertem alpha ferrioxyd Withdrawn DE1771327B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US63930367A 1967-05-18 1967-05-18

Publications (1)

Publication Number Publication Date
DE1771327B1 true DE1771327B1 (de) 1972-02-03

Family

ID=24563568

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19681771327 Withdrawn DE1771327B1 (de) 1967-05-18 1968-05-08 Verfahren zur herstellung von magnetischemx gamma fe tief 2 o tief 3 aus alpha ferrioxid oder hydratisiertem alpha ferrioxyd

Country Status (7)

Country Link
US (1) US3498748A (cg-RX-API-DMAC7.html)
BE (1) BE714949A (cg-RX-API-DMAC7.html)
CH (1) CH498051A (cg-RX-API-DMAC7.html)
DE (1) DE1771327B1 (cg-RX-API-DMAC7.html)
FR (1) FR1568474A (cg-RX-API-DMAC7.html)
GB (1) GB1190026A (cg-RX-API-DMAC7.html)
NL (1) NL158014B (cg-RX-API-DMAC7.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014302A1 (de) * 1979-02-03 1980-08-20 BASF Aktiengesellschaft Verfahren zur Herstellung von hochkoerzitivem nadelförmigem Gamma-Eisen(III)oxid

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1587959A (cg-RX-API-DMAC7.html) * 1967-11-25 1970-04-03
GB1392196A (en) * 1971-03-17 1975-04-30 Pfizer Synthetic gamma ferric oxide
US3904540A (en) * 1972-02-11 1975-09-09 Pfizer Magnetic impulse record member
DE2447386C2 (de) * 1974-10-04 1983-07-07 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von γ-Eisen(III)oxid
US4086174A (en) * 1976-01-13 1978-04-25 Pfizer Inc. Cobalt modified acicular γ ferric oxide and process for preparing the same
US4107063A (en) * 1977-03-02 1978-08-15 International Business Machines Corporation Water based selectable charge magnetic inks
DE2805405A1 (de) * 1978-02-09 1979-08-16 Basf Ag Verfahren zur herstellung von nadelfoermigen, ferrimagnetischen eisenoxiden
DE3044340A1 (de) * 1980-11-25 1982-06-24 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von hochkoerzitivem nadelfoermigem gamma-eisen(iii)oxid
DE3143870A1 (de) * 1981-11-05 1983-05-11 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von nadelfoermigen, ferrimagnetischen eisenoxiden
DE3204547A1 (de) * 1982-02-10 1983-08-18 Basf Ag, 6700 Ludwigshafen Nadelfoermiges ferrimagnetisches eisenoxid und verfahren zu seiner herstellung
DE3224325A1 (de) * 1982-06-30 1984-01-05 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von nadelfoermigen, ferrimagnetischen eisenoxiden
JPS5972104A (ja) * 1982-10-19 1984-04-24 Toshiba Corp 磁性体粉末
US4554088A (en) * 1983-05-12 1985-11-19 Advanced Magnetics Inc. Magnetic particles for use in separations
US5219554A (en) * 1986-07-03 1993-06-15 Advanced Magnetics, Inc. Hydrated biodegradable superparamagnetic metal oxides
US5069216A (en) * 1986-07-03 1991-12-03 Advanced Magnetics Inc. Silanized biodegradable super paramagnetic metal oxides as contrast agents for imaging the gastrointestinal tract
UA113269C2 (xx) * 2009-05-29 2017-01-10 Намагнічувані чорнила

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694656A (en) * 1947-07-25 1954-11-16 Armour Res Found Magnetic impulse record member, magnetic material, and method of making magnetic material
US2799599A (en) * 1957-07-16 Lustered fur hairs and method for
US3278440A (en) * 1960-11-22 1966-10-11 William J Schuele Shaped fine particle ferrites and method for their preparation
US3399143A (en) * 1967-08-02 1968-08-27 Macdermid Inc Method of stripping nickel from articles and the composition used therein

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3399142A (en) * 1963-10-02 1968-08-27 Georgia Kaolin Co Magnetic materials and methods of making the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2799599A (en) * 1957-07-16 Lustered fur hairs and method for
US2694656A (en) * 1947-07-25 1954-11-16 Armour Res Found Magnetic impulse record member, magnetic material, and method of making magnetic material
US3278440A (en) * 1960-11-22 1966-10-11 William J Schuele Shaped fine particle ferrites and method for their preparation
US3399143A (en) * 1967-08-02 1968-08-27 Macdermid Inc Method of stripping nickel from articles and the composition used therein

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014302A1 (de) * 1979-02-03 1980-08-20 BASF Aktiengesellschaft Verfahren zur Herstellung von hochkoerzitivem nadelförmigem Gamma-Eisen(III)oxid

Also Published As

Publication number Publication date
NL6806470A (cg-RX-API-DMAC7.html) 1968-11-19
GB1190026A (en) 1970-04-29
US3498748A (en) 1970-03-03
FR1568474A (cg-RX-API-DMAC7.html) 1969-05-23
NL158014B (nl) 1978-09-15
BE714949A (cg-RX-API-DMAC7.html) 1968-11-12
CH498051A (de) 1970-10-31

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Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977
8339 Ceased/non-payment of the annual fee