DE69115579T2 - Magnetische spindelförmige Eisenlegierungsteilchen und Verfahren zu ihrer Herstellung - Google Patents

Magnetische spindelförmige Eisenlegierungsteilchen und Verfahren zu ihrer Herstellung

Info

Publication number
DE69115579T2
DE69115579T2 DE69115579T DE69115579T DE69115579T2 DE 69115579 T2 DE69115579 T2 DE 69115579T2 DE 69115579 T DE69115579 T DE 69115579T DE 69115579 T DE69115579 T DE 69115579T DE 69115579 T2 DE69115579 T2 DE 69115579T2
Authority
DE
Germany
Prior art keywords
production
iron alloy
alloy particles
shaped iron
magnetic spindle
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
DE69115579T
Other languages
English (en)
Other versions
DE69115579D1 (de
Inventor
Akio Mishima
Tosiharu Harada
Mamoru Tanihara
Yasutaka Ota
Kenji Okinaka
Kohji Mori
Hirofumi Kawasaki
Norimichi Nagai
Katsunori Fujimoto
Yoshiro Okuda
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26492289&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE69115579(T2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP16868490A external-priority patent/JP3264374B2/ja
Priority claimed from JP17387190A external-priority patent/JP3144683B2/ja
Application filed by Toda Kogyo Corp filed Critical Toda Kogyo Corp
Publication of DE69115579D1 publication Critical patent/DE69115579D1/de
Application granted granted Critical
Publication of DE69115579T2 publication Critical patent/DE69115579T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G11B5/70605—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 metals or alloys
    • G11B5/70621—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 metals or alloys containing Co metal or alloys
    • 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
    • G11B5/70605—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 metals or alloys
    • G11B5/70615—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 metals or alloys containing Fe metal or alloys
    • 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
    • G11B5/714—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 dimension of the magnetic particles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/061—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder with a protective layer
DE69115579T 1990-06-26 1991-06-13 Magnetische spindelförmige Eisenlegierungsteilchen und Verfahren zu ihrer Herstellung Expired - Fee Related DE69115579T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP16868490A JP3264374B2 (ja) 1990-06-26 1990-06-26 紡錘形を呈した鉄を主成分とする金属磁性粒子粉末の製造法
JP17387190A JP3144683B2 (ja) 1990-06-29 1990-06-29 紡錘形を呈した鉄を主成分とする金属磁性粒子粉末

Publications (2)

Publication Number Publication Date
DE69115579D1 DE69115579D1 (de) 1996-02-01
DE69115579T2 true DE69115579T2 (de) 1996-08-22

Family

ID=26492289

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69115579T Expired - Fee Related DE69115579T2 (de) 1990-06-26 1991-06-13 Magnetische spindelförmige Eisenlegierungsteilchen und Verfahren zu ihrer Herstellung

Country Status (3)

Country Link
US (2) US5466306A (de)
EP (1) EP0466338B1 (de)
DE (1) DE69115579T2 (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0726878B1 (de) * 1993-11-01 1999-05-12 Minnesota Mining And Manufacturing Company Verfahren zur herstellung von goethit
JPH07210856A (ja) * 1994-01-19 1995-08-11 Tdk Corp 磁気記録媒体
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
US5989516A (en) * 1994-12-13 1999-11-23 Toda Kogyo Corporation Spindle-shaped geothite particles
JP3473875B2 (ja) * 1995-07-04 2003-12-08 富士写真フイルム株式会社 磁気記録媒体
DE19601412C2 (de) * 1996-01-17 1999-07-22 Emtec Magnetics Gmbh Ferromagnetische Pigmente
JP3087825B2 (ja) 1996-04-26 2000-09-11 戸田工業株式会社 紡錘状ゲータイト粒子粉末及びその製造法並びに該ゲータイト粒子粉末を出発原料として得られる鉄を主成分とする紡錘状金属磁性粒子粉末及びその製造法
SG78328A1 (en) * 1997-12-25 2001-02-20 Matsushita Electric Ind Co Ltd Magnetic composite article and manufacturing method of the same and soft magnetic powder of fe-al-si system alloy used in the composite article
US6753084B2 (en) 2000-12-27 2004-06-22 Toda Kogyo Corporation Spindle-shaped magnetic alloy particles for magnetic recording, and magnetic recording medium
US7172642B2 (en) * 2001-12-04 2007-02-06 Toda Kogyo Corporation Magnetic metal particles containing iron as main component, process for producing the same and magnetic recording medium using the same
JP2004083300A (ja) * 2002-08-23 2004-03-18 Kanto Denka Kogyo Co Ltd 重層構造を有する塗布型磁気記録媒体の下地層形成用酸化鉄粉末及びその製造方法
US7648933B2 (en) * 2006-01-13 2010-01-19 Dynamic Abrasives Llc Composition comprising spinel crystals, glass, and calcium iron silicate
RU2314870C1 (ru) * 2006-09-06 2008-01-20 Институт Катализа Им. Г.К. Борескова Сибирского Отделения Российской Академии Наук Катализатор паровой конверсии моноксида углерода, способ его приготовления и способ его использования
EP2686458A4 (de) 2011-03-18 2015-04-15 Orbite Aluminae Inc Verfahren zur wiedergewinnung von seltenerdelementen aus aluminiumhaltigen materialien
US9410227B2 (en) 2011-05-04 2016-08-09 Orbite Technologies Inc. Processes for recovering rare earth elements from various ores
CA2863755C (en) 2011-06-03 2016-04-26 Orbite Aluminae Inc. Methods for preparing hematite
EP2755918A4 (de) 2011-09-16 2015-07-01 Orbite Aluminae Inc Verfahren zur herstellung von tonerde und verschiedenen anderen produkten
RU2016104423A (ru) 2012-01-10 2018-11-22 Орбит Текнолоджис Инк. Способы обработки красного шлама
CA2903512C (en) 2012-03-29 2017-12-05 Orbite Technologies Inc. Processes for treating fly ashes
MY190290A (en) 2012-07-12 2022-04-12 Orbite Tech Inc Processes for preparing titanium oxide and various other products
CA2885255C (en) 2012-09-26 2015-12-22 Orbite Aluminae Inc. Processes for preparing alumina and magnesium chloride by hc1 leaching of various materials
AU2013344721A1 (en) 2012-11-14 2015-07-02 Orbite Aluminae Inc. Methods for purifying aluminium ions

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4059463A (en) * 1972-01-27 1977-11-22 Fuji Photo Film Co., Ltd. Process for producing ferromagnetic powder
US4096316A (en) * 1973-08-18 1978-06-20 Fuji Photo Film Co., Ltd. Method of producing magnetic material with alkaline borohydrides
EP0041257B1 (de) * 1980-05-30 1984-11-14 Hitachi Maxell Ltd. Verfahren zur Herstellung ferromagnetischer Teilchen aus metallischem Eisen
JPS58119609A (ja) * 1982-01-11 1983-07-16 Fuji Photo Film Co Ltd 磁気記録媒体
US4514216A (en) * 1983-04-30 1985-04-30 Toda Kogyo Corp. Acicular ferromagnetic alloy particles for magnetic recording and process for producing the same
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
JPS6021819A (ja) * 1983-07-15 1985-02-04 Nippon Soda Co Ltd ゲ−タイト針状結晶の製造方法
JPS6021307A (ja) * 1983-07-15 1985-02-02 Nippon Soda Co Ltd 強磁性金属粉末の製造方法
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
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
JPH0755827B2 (ja) * 1987-03-28 1995-06-14 戸田工業株式会社 紡錘形を呈した鉄を主成分とする金属磁性粒子粉末の製造法
JP2704525B2 (ja) * 1988-08-12 1998-01-26 戸田工業株式会社 紡錘形を呈したゲータイト粒子粉末の製造法
US4990182A (en) * 1988-09-05 1991-02-05 Mitsubishi Petrochemical Company Limited Carbon-containing magnetic metal powder
US5260132A (en) * 1988-10-31 1993-11-09 Hitachi Maxell, Ltd. Acicular alloy magnetic powder
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.
US5137783A (en) * 1989-04-07 1992-08-11 Toda Kogyo Corporation Acicular magnetic metal particles containing iron as main ingredient and process for producing the same
EP0401000B1 (de) * 1989-05-31 1995-07-26 Toda Kogyo Corp. Plattenförmige Magnetitteilchen und Verfahren zu ihrer Erzeugung

Also Published As

Publication number Publication date
DE69115579D1 (de) 1996-02-01
US5466306A (en) 1995-11-14
US5599378A (en) 1997-02-04
EP0466338A1 (de) 1992-01-15
EP0466338B1 (de) 1995-12-20

Similar Documents

Publication Publication Date Title
DE69115579D1 (de) Magnetische spindelförmige Eisenlegierungsteilchen und Verfahren zu ihrer Herstellung
DE69433766D1 (de) Magnetische Teilchen und Verfahren zu ihrer Herstellung
DE69115939D1 (de) Magnetkopf und Verfahren zu seiner Herstellung
DE69125455T2 (de) Harzgebundene supraleitende Magnetspule und Verfahren zu ihrer Herstellung
DE69526313D1 (de) Magnetische, spindelförmige Legierungsteilchen mit Kobalt und Eisen als Hauptbestandteilen sowie Verfahren zu deren Herstellung
DE68923544D1 (de) Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung.
DE69020000D1 (de) Magnetkopf und Verfahren zu seiner Herstellung.
DE69010371D1 (de) Nadelförmige magnetische Eisenlegierungsteilchen und Verfahren zu ihrer Herstellung.
DE69026307T2 (de) Polyurethan-Polyharnstoffpartikel und Verfahren zu ihrer Herstellung
DE69207721T2 (de) Gemischtes Metallhydroxyd und Verfahren zu seiner Herstellung
DE69207525T2 (de) Magnetit-Teilchen und Verfahren zu ihrer Herstellung
DE69122134T2 (de) Eisen als Hauptkomponente enthaltende magnetische Tonerteilchen und Verfahren zu ihrer Herstellung
DE68911757T2 (de) Blättchenförmige Ferritteilchen für magnetische Aufzeichnung und Verfahren zu ihrer Herstellung.
DE69121457T2 (de) Supraleitendes Oxid und Verfahren zu seiner Herstellung
DE69124477T2 (de) Prägemetallform und Verfahren zu ihrer Herstellung
DE68918836D1 (de) Nadelförmige magnetische Teilchen aus einer Eisenlegierung für magnetische Aufzeichnung und Verfahren zu ihrer Herstellung.
DE69404221D1 (de) Bügeleisen und Verfahren zu seiner Herstellung
DE69407627D1 (de) Sphärische Magnetteilchen und Verfahren ihrer Herstellung
DE68918692D1 (de) Plättchenförmige feine Ferritteilchen für magnetische Aufzeichnung und Verfahren zu ihrer Herstellung.
DE69028172D1 (de) Supraleitende magnetische Abschirmung und Verfahren zu ihrer Herstellung
DE69116723D1 (de) Supraleitendes Oxid und Verfahren zu seiner Herstellung
DE69106293T2 (de) Nadelförmige ferromagnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung.
DE69323957D1 (de) Magnetische Teilchen für magnetische Aufzeichnungsträger und Verfahren zu ihrer Herstellung
DE69305487T2 (de) Magnetisches kobalthaltiges Eisenoxid und Verfahren zu dessen Herstellung
DE68905620T2 (de) Feine Eisenkarbidteilchen und Verfahren zu ihrer Herstellung.

Legal Events

Date Code Title Description
8363 Opposition against the patent
8339 Ceased/non-payment of the annual fee