JPH0146445B2 - - Google Patents

Info

Publication number
JPH0146445B2
JPH0146445B2 JP55118540A JP11854080A JPH0146445B2 JP H0146445 B2 JPH0146445 B2 JP H0146445B2 JP 55118540 A JP55118540 A JP 55118540A JP 11854080 A JP11854080 A JP 11854080A JP H0146445 B2 JPH0146445 B2 JP H0146445B2
Authority
JP
Japan
Prior art keywords
iron oxide
temperature
iron
acicular
magnetite
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
JP55118540A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5637227A (en
Inventor
Zarunetsuki Uiruherumu
Marooji Rasutsuro
Autsuen Horusuto
Ooringaa Manfureeto
Shutetsuku Uerunaa
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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of JPS5637227A publication Critical patent/JPS5637227A/ja
Publication of JPH0146445B2 publication Critical patent/JPH0146445B2/ja
Granted 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
    • G11B5/70678—Ferrites
    • G11B5/70684—Ferro-ferrioxydes
    • 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
    • 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]
    • 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
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area
    • 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)
JP11854080A 1979-09-01 1980-08-29 Manufacture of needleelike highly magnetic iron oxide Granted JPS5637227A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19792935444 DE2935444A1 (de) 1979-09-01 1979-09-01 Verfahren zur herstellung von nadelfoermigen ferrimagnetischem eisenoxid

Publications (2)

Publication Number Publication Date
JPS5637227A JPS5637227A (en) 1981-04-10
JPH0146445B2 true JPH0146445B2 (en]) 1989-10-09

Family

ID=6079870

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11854080A Granted JPS5637227A (en) 1979-09-01 1980-08-29 Manufacture of needleelike highly magnetic iron oxide

Country Status (4)

Country Link
US (1) US4367214A (en])
EP (1) EP0024693B1 (en])
JP (1) JPS5637227A (en])
DE (2) DE2935444A1 (en])

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU548794B2 (en) * 1981-07-28 1986-01-02 Ishihara Sangyo Kaisha Ltd. Process for producing cobalt containing ferromagnetic iron oxides
DE3143870A1 (de) * 1981-11-05 1983-05-11 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von nadelfoermigen, ferrimagnetischen eisenoxiden
DE3224325A1 (de) * 1982-06-30 1984-01-05 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von nadelfoermigen, ferrimagnetischen eisenoxiden
JPS61106410A (ja) * 1984-10-25 1986-05-24 Daikin Ind Ltd 炭化鉄を含有する粒子、その製法及び用途
DE3432224A1 (de) * 1984-09-01 1986-03-13 Bayer Ag, 5090 Leverkusen Hoeherkoerzitive isometrische eisenoxide, verfahren zu ihrer herstellung sowie deren verwendung
JPS61106408A (ja) * 1984-10-25 1986-05-24 Daikin Ind Ltd 炭化鉄を含有する針状粒子の製造法
FR2587989B1 (fr) * 1985-09-30 1987-11-13 Centre Nat Rech Scient Compositions particulaires d'oxalates de metaux ferromagnetiques, sous forme de particules aciculaires submicroniques, leur preparation et leur application
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
US4822509A (en) * 1986-11-06 1989-04-18 Eltech Systems Corporation Highly magnetic iron oxide powder
MY107614A (en) * 1990-09-26 1996-05-15 Ishihara Sangyo Kaisha Acicular ferromagnetic iron oxide particles and process for producing the same
DE69305487T2 (de) * 1992-12-29 1997-03-13 Ishihara Sangyo Kaisha Magnetisches kobalthaltiges Eisenoxid und Verfahren zu dessen Herstellung
JPH07106110A (ja) * 1993-10-06 1995-04-21 Yasunori Takahashi ボンド磁石製造用粉末組成物、磁気異方性永久磁石及び磁気異方性永久磁石の製造法
US5814164A (en) * 1994-11-09 1998-09-29 American Scientific Materials Technologies L.P. Thin-walled, monolithic iron oxide structures made from steels, and methods for manufacturing such structures
US6461562B1 (en) 1999-02-17 2002-10-08 American Scientific Materials Technologies, Lp Methods of making sintered metal oxide articles
US7465485B2 (en) * 2003-12-23 2008-12-16 High Voltage Graphics, Inc. Process for dimensionalizing flocked articles or wear, wash and abrasion resistant flocked articles

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB675260A (en) 1948-02-16 1952-07-09 Minnesota Mining & Mfg Improvements in or relating to method of making magnetic material, the magnetic material resulting from said method, and a magnetic record tape or sheet employing said magnetic material
DE801352C (de) * 1949-05-21 1951-01-04 Basf Ag Verfahren zur Herstellung von Magnetogrammtraegern
US2900236A (en) * 1955-08-03 1959-08-18 Audio Devices Inc Production of ferromagnetic iron oxide
US3399142A (en) * 1963-10-02 1968-08-27 Georgia Kaolin Co Magnetic materials and methods of making the same
BE658894A (en]) * 1964-01-30
DE1592398A1 (de) * 1967-02-08 1970-12-17 Bayer Ag Verwendung von hochkoerzitivem nadelfoermigem gamma-Fe2O3 zur Herstellung von Magnetogrammtraegern
GB1268458A (en) * 1969-05-07 1972-03-29 Ampex Improvements in and relating to the preparation of cobalt doped gamma ferric oxide
NL7018467A (en]) * 1969-12-24 1971-06-28
US3904540A (en) * 1972-02-11 1975-09-09 Pfizer Magnetic impulse record member
NL180000C (nl) * 1972-04-21 1986-12-16 Anvar Werkwijze voor de bereiding van een fijnverdeeld poeder uit een vaste oplossing van met een of meer tweewaardige metalen gesubstitueerd gamma-feÿ2oÿ3.
JPS5241758B2 (en]) * 1972-09-01 1977-10-20
DE2254810C2 (de) * 1972-11-09 1985-12-12 Basf Ag, 6700 Ludwigshafen Verfahren zur Verbesserung der magnetischen Eigenschaften von Gamma-Eisen (III)oxiden
US3931025A (en) * 1973-09-21 1976-01-06 Bayer Aktiengesellschaft Magnetic iron oxides with improved orientability and a process for their production
DE2428875C2 (de) * 1974-06-14 1983-11-03 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von γ-Eisen(III)oxid
US4096292A (en) * 1975-01-14 1978-06-20 Montedison S.P.A. Process for preparing ferrimagnetic acicular ferric oxide
DE2801395C2 (de) * 1978-01-13 1982-04-22 Bayer Ag, 5090 Leverkusen Thermisch stabilisiertes ferrimagnetisches Eisenoxid
JPS54122699A (en) * 1978-02-14 1979-09-22 Toda Kogyo Corp Manufacture of needleelike hematite particle powder
US4209412A (en) * 1978-05-22 1980-06-24 Hercules Incorporated Process for producing nonstoichiometric ferroso-ferric oxides

Also Published As

Publication number Publication date
DE3067620D1 (en) 1984-05-30
JPS5637227A (en) 1981-04-10
EP0024693A3 (en) 1981-03-18
US4367214A (en) 1983-01-04
DE2935444A1 (de) 1981-03-19
EP0024693A2 (de) 1981-03-11
EP0024693B1 (de) 1984-04-25

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