DE68923544D1 - Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung. - Google Patents

Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung.

Info

Publication number
DE68923544D1
DE68923544D1 DE68923544T DE68923544T DE68923544D1 DE 68923544 D1 DE68923544 D1 DE 68923544D1 DE 68923544 T DE68923544 T DE 68923544T DE 68923544 T DE68923544 T DE 68923544T DE 68923544 D1 DE68923544 D1 DE 68923544D1
Authority
DE
Germany
Prior art keywords
manufacture
iron oxide
oxide particles
magnetic iron
magnetic
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 - Fee Related
Application number
DE68923544T
Other languages
English (en)
Other versions
DE68923544T2 (de
Inventor
Atsushi Takedoi
Mamoru Tanihara
Tosiharu Harada
Masaru Isoai
Kazuhiro Fujita
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.)
Toda Kogyo Corp
Original Assignee
Toda Kogyo Corp
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
Priority claimed from JP63333108A external-priority patent/JP2925561B2/ja
Priority claimed from JP63333109A external-priority patent/JP2704540B2/ja
Priority claimed from JP1048029A external-priority patent/JP2704544B2/ja
Priority claimed from JP1048028A external-priority patent/JP2743007B2/ja
Application filed by Toda Kogyo Corp filed Critical Toda Kogyo Corp
Publication of DE68923544D1 publication Critical patent/DE68923544D1/de
Application granted granted Critical
Publication of DE68923544T2 publication Critical patent/DE68923544T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62Record carriers characterised by the selection of the material
    • G11B5/68Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70Record 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
    • G11B5/706Record 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
    • G11B5/70626Record 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
    • G11B5/70642Record 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
    • G11B5/70678Ferrites
    • G11B5/70684Ferro-ferrioxydes
    • G11B5/70694Non-stoechiometric ferro-ferrioxydes, e.g. berthollide
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00Stock material or miscellaneous articles
    • Y10S428/90Magnetic feature
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/29Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982Particulate matter [e.g., sphere, flake, etc.]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/29Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991Coated
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/29Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991Coated
    • Y10T428/2993Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
DE68923544T 1988-12-29 1989-04-21 Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung. Expired - Fee Related DE68923544T2 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP63333108A JP2925561B2 (ja) 1988-12-29 1988-12-29 紡錘形を呈した磁性酸化鉄粒子粉末
JP63333109A JP2704540B2 (ja) 1988-12-29 1988-12-29 紡錘形を呈した磁性酸化鉄粒子粉末の製造法
JP1048029A JP2704544B2 (ja) 1989-02-27 1989-02-27 紡錘形を呈した磁性酸化鉄粒子粉末の製造法
JP1048028A JP2743007B2 (ja) 1989-02-27 1989-02-27 紡錘形を呈した磁性酸化鉄粒子粉末及びその製造法

Publications (2)

Publication Number Publication Date
DE68923544D1 true DE68923544D1 (de) 1995-08-24
DE68923544T2 DE68923544T2 (de) 1996-03-28

Family

ID=27462143

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68923544T Expired - Fee Related DE68923544T2 (de) 1988-12-29 1989-04-21 Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung.

Country Status (3)

Country Link
US (2) US5314750A (de)
EP (1) EP0377933B1 (de)
DE (1) DE68923544T2 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68923544T2 (de) * 1988-12-29 1996-03-28 Toda Kogyo Corp Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung.
EP0466338B1 (de) * 1990-06-26 1995-12-20 Toda Kogyo Corp. Magnetische spindelförmige Eisenlegierungsteilchen und Verfahren zu ihrer Herstellung
EP0515748B1 (de) * 1991-05-31 1996-12-27 Toda Kogyo Corp. Verfahren zur Herstellung von nadelförmigen Goethit-Teilchen und nadelförmigen magnetischen Eisenoxid-Teilchen
EP0604849B1 (de) * 1992-12-29 1996-10-16 Ishihara Sangyo Kaisha, Ltd. Magnetisches kobalthaltiges Eisenoxid und Verfahren zu dessen Herstellung
US5648170A (en) * 1993-04-27 1997-07-15 Toda Kogyo Corporation Coated granular magnetite particles and process for producing the same
CA2175466A1 (en) * 1993-11-01 1995-05-11 Jean A. Lown Process for making goethite
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
JP3428197B2 (ja) * 1994-12-09 2003-07-22 戸田工業株式会社 針状磁性酸化鉄粒子粉末及びその製造法
US5989516A (en) * 1994-12-13 1999-11-23 Toda Kogyo Corporation Spindle-shaped geothite particles
US5645652A (en) * 1994-12-13 1997-07-08 Toda Kogyo Corporation Spindle-shaped magnetic iron-based alloy particles containing cobalt and iron as the main ingredients and process for producing the same
US6461562B1 (en) 1999-02-17 2002-10-08 American Scientific Materials Technologies, Lp Methods of making sintered metal oxide articles
CA2379897A1 (en) * 1999-07-29 2001-02-08 Halliburton Energy Services, Inc. Method and composition for scavenging sulphide in drilling fluids
US6179987B1 (en) 1999-08-11 2001-01-30 Ut Battelle, Llc Method and apparatus to electrolytically produce high-purity magnetite particles
EP1492089B1 (de) * 2002-04-03 2007-06-06 Dowa Mining Co., Ltd. Pulver für die unterschicht eines magnetaufzeichnungsmediums des beschichtungstyps und magnetisches aufzeichnungsmedium damit
US7238438B2 (en) * 2002-04-03 2007-07-03 Dowa Mining Co., Ltd. Powder for underlayer of coating-type magnetic recording medium
US9254453B2 (en) 2013-03-06 2016-02-09 Halliburton Energy Services, Inc. Economical method for scavenging hydrogen sulfide in fluids
CN103529018B (zh) * 2013-10-04 2015-12-23 北京联合大学生物化学工程学院 用于监测苯和三甲胺的催化发光敏感材料
CN111569820B (zh) * 2020-06-04 2023-08-22 浙江恒昌纺织科技有限公司 一种污染物高效固定材料和污染物高效固定方法

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3720618A (en) * 1970-05-08 1973-03-13 Toda Kogyo Corp Method of producing a powder of cobalt-containing needle-like shaped gamma-ferric oxide particles as magnetic recording material
US3977985A (en) * 1972-02-23 1976-08-31 Tdk Electronics Company, Limited Magnetic recording medium comprising cobalt or cobalt alloy coated particles of spicular magnetite
JPS5080999A (de) * 1973-11-22 1975-07-01
JPS5310279B2 (de) * 1974-03-01 1978-04-12
US4108787A (en) * 1974-12-20 1978-08-22 Fuji Photo Film Co., Ltd. Process for producing ferromagnetic iron oxide
JPS525497A (en) * 1975-07-02 1977-01-17 Fuji Photo Film Co Ltd Ferromagnetic grit manufacturing process
US4136158A (en) * 1976-11-01 1979-01-23 Toda Kogyo Corp. Production of acicular magnetic iron oxides
US4226909A (en) * 1978-08-21 1980-10-07 Minnesota Mining And Manufacturing Company Cobalt-doped acicular hyper-magnetite particles
US4276183A (en) * 1978-10-25 1981-06-30 Pfizer Inc. Cobalt modified magnetic iron oxide
DE2903593C3 (de) * 1979-01-31 1982-05-06 Bayer Ag, 5090 Leverkusen Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung
US4495164A (en) * 1980-05-30 1985-01-22 Toda Kogyo Corp. Process for producing acicular magnetite or acicular maghemite
FR2487326A1 (fr) * 1980-07-24 1982-01-29 Kodak Pathe Procede de preparation de particules aciculaires d'oxyde de fer magnetique
JPS5852806A (ja) * 1981-09-24 1983-03-29 Hitachi Maxell Ltd 磁気記録媒体
DE3469820D1 (en) * 1983-04-25 1988-04-14 Daikin Ind Ltd Acicular particulate material containing iron carbide
US4842759A (en) * 1983-04-25 1989-06-27 Daikin Industries, Ltd. Acicular process for producing particulate material
JPS59232922A (ja) * 1983-06-15 1984-12-27 Dainippon Ink & Chem Inc 軸比の大きな紡錘形ゲ−サイトの製造方法
JPS6036603A (ja) * 1983-08-10 1985-02-25 Dainippon Ink & Chem Inc 比表面積の小さな微小金属磁性粉およびその製造方法
KR850004869A (ko) * 1983-12-27 1985-07-27 마쓰이 고로오 방추형 강자성 합금입자 및 그의 제조방법
EP0160496B1 (de) * 1984-04-28 1989-09-13 Toda Kogyo Corp. Magnetische Eisenoxydteilchen
JPH0651574B2 (ja) * 1985-11-30 1994-07-06 戸田工業株式会社 紡錘型を呈した磁性酸化鉄粒子粉末の製造法
JPH0647681B2 (ja) * 1985-12-28 1994-06-22 戸田工業株式会社 紡錘形状を呈した鉄を主成分とする金属磁性粒子粉末及びその製造法
EP0265189B1 (de) * 1986-10-17 1992-08-05 Toda Kogyo Corp. Nadelförmige magnetische Eisenoxydteilchen, Verfahren zu ihrer Herstellung und solche Teilchen verwendende magnetische Aufzeichnungsträger
DE68923544T2 (de) * 1988-12-29 1996-03-28 Toda Kogyo Corp Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung.
DE68918836T2 (de) * 1989-01-27 1995-02-23 Toda Kogyo Corp Nadelförmige magnetische Teilchen aus einer Eisenlegierung für magnetische Aufzeichnung und Verfahren zu ihrer Herstellung.
US5028483A (en) * 1990-06-01 1991-07-02 Minnesota Mining And Manufacturing Company Magnetic recording medium comprising acicular dendrite free iron oxide magnetic pigment particles

Also Published As

Publication number Publication date
US5582914A (en) 1996-12-10
EP0377933A2 (de) 1990-07-18
EP0377933A3 (de) 1991-05-08
EP0377933B1 (de) 1995-07-19
US5314750A (en) 1994-05-24
DE68923544T2 (de) 1996-03-28

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee