KR850003025A - 자기기록을 위한 육각판형 바륨페라이트입자 및 그 제조방법 - Google Patents

자기기록을 위한 육각판형 바륨페라이트입자 및 그 제조방법 Download PDF

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Publication number
KR850003025A
KR850003025A KR1019840006271A KR840006271A KR850003025A KR 850003025 A KR850003025 A KR 850003025A KR 1019840006271 A KR1019840006271 A KR 1019840006271A KR 840006271 A KR840006271 A KR 840006271A KR 850003025 A KR850003025 A KR 850003025A
Authority
KR
South Korea
Prior art keywords
particles
barium ferrite
hexagonal barium
hexagonal
particle according
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Withdrawn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
KR1019840006271A
Other languages
English (en)
Korean (ko)
Inventor
노리미찌 나가이 (외 3)
Original Assignee
마쓰이 고로오 (외 1)
도다 고오교오 가부시끼 가이샤
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=16276635&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=KR850003025(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 마쓰이 고로오 (외 1), 도다 고오교오 가부시끼 가이샤 filed Critical 마쓰이 고로오 (외 1)
Publication of KR850003025A publication Critical patent/KR850003025A/ko
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • 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
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers

Landscapes

  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Magnetic Record Carriers (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Paints Or Removers (AREA)
KR1019840006271A 1983-10-12 1984-10-11 자기기록을 위한 육각판형 바륨페라이트입자 및 그 제조방법 Withdrawn KR850003025A (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP58-191556 1983-10-12
JP58191556A JPS6081804A (ja) 1983-10-12 1983-10-12 磁気記録用六角板状Ｂａフエライト微粒子粉末及びその製造法

Publications (1)

Publication Number Publication Date
KR850003025A true KR850003025A (ko) 1985-05-28

Family

ID=16276635

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019840006271A Withdrawn KR850003025A (ko) 1983-10-12 1984-10-11 자기기록을 위한 육각판형 바륨페라이트입자 및 그 제조방법

Country Status (5)

Country Link
US (1) US4698182A (OSRAM)
EP (1) EP0141558B2 (OSRAM)
JP (1) JPS6081804A (OSRAM)
KR (1) KR850003025A (OSRAM)
DE (1) DE3465541D1 (OSRAM)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4714654A (en) * 1984-12-20 1987-12-22 Kabushiki Kaisha Toshiba Magnetic recording medium
JPH08702B2 (ja) * 1985-04-04 1996-01-10 石原産業株式会社 磁気記録用強磁性微粉末の製造方法
JPS6259531A (ja) * 1985-09-06 1987-03-16 Ube Ind Ltd バリウムフエライト粉末の製造法
FR2587990B1 (fr) * 1985-09-30 1987-11-13 Centre Nat Rech Scient Compositions d'oxydes magnetiques particulaires a structure de type spinelle lacunaire, leur preparation et leur application
JPS62176921A (ja) * 1986-01-29 1987-08-03 Toda Kogyo Corp 板状Ｂａフエライト微粒子粉末の製造法
EP0232131B1 (en) * 1986-01-29 1991-09-18 Toda Kogyo Corp. Plate-like barium ferrite particles suitable for use in magnetic recording and process for producing the same
JPH0688795B2 (ja) * 1986-04-11 1994-11-09 石原産業株式会社 磁気記録用強磁性微粉末の製造方法
JPH0764567B2 (ja) * 1986-12-27 1995-07-12 戸田工業株式会社 磁気記録用板状マグネトプランバイト型フエライト微粒子粉末
US4828916A (en) * 1986-12-27 1989-05-09 Toda Kogyo Corporation Plate-like magnetoplumbite type ferrite particles for magnetic recording and magnetic recording media using the same
US4778734A (en) * 1987-02-03 1988-10-18 Ube Industries, Ltd. Barium ferrite magnetic powder and magnetic recording medium containing the same
JPH0770040B2 (ja) * 1987-09-30 1995-07-31 富士写真フイルム株式会社 磁気記録媒体
US5075169A (en) * 1988-06-08 1991-12-24 Toda Kogyo Corp. Plate-like composite ferrite particles for magnetic recording and process for producing the same
DE3932389A1 (de) * 1989-09-28 1991-04-11 Basf Ag Verfahren zur herstellung von feinteiligem pulverfoermigem hexagonalem ferrit und seine verwendung zur herstellung von magnetischen aufzeichnungstraegern
JP2655200B2 (ja) * 1990-08-24 1997-09-17 富士写真フイルム株式会社 ハロゲン化銀写真感光材料
US5593612A (en) * 1990-11-30 1997-01-14 The United States Of America As Represented By The Secretary Of The Navy U, W, X, Y and Z-type ferrites
JP5165231B2 (ja) * 2006-11-29 2013-03-21 旭化成イーマテリアルズ株式会社 磁性粉含有樹脂組成物

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5667904A (en) * 1979-11-08 1981-06-08 Toshiba Corp Preparation method of megnetic powder for high density magnetic recording
JPS5676510A (en) * 1979-11-28 1981-06-24 Tdk Corp Manufacture of magnetic recording material
JPS6012973B2 (ja) * 1980-05-08 1985-04-04 株式会社東芝 Ｂａ−フエライト粉末の製造方法
JPS5756904A (en) * 1980-09-22 1982-04-05 Toshiba Corp Magnetic powder for magnetic recording medium
JPS5756327A (en) * 1980-09-22 1982-04-03 Toshiba Corp Manufacture of magnetic powder for magnetic recording medium
JPS57198604A (en) * 1981-05-30 1982-12-06 Toshiba Corp Ferromagnetic powder for magnetic recording medium and manufacture thereof
EP0072436B1 (de) * 1981-08-19 1986-10-01 BASF Aktiengesellschaft Verfahren zur Herstellung feinteiliger Ferritpulver
EP0072437B1 (de) * 1981-08-19 1987-01-07 BASF Aktiengesellschaft Verfahren zur Herstellung feinteiliger Ferritpulver
JPS5856303A (ja) * 1981-09-30 1983-04-04 Toshiba Corp 磁性粉末の製造法

Also Published As

Publication number Publication date
JPS6081804A (ja) 1985-05-09
EP0141558A1 (en) 1985-05-15
EP0141558B1 (en) 1987-08-19
DE3465541D1 (en) 1987-09-24
JPH0578161B2 (OSRAM) 1993-10-28
EP0141558B2 (en) 1992-09-30
US4698182A (en) 1987-10-06

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Legal Events

Date Code Title Description
PA0109 Patent application

Patent event code: PA01091R01D

Comment text: Patent Application

Patent event date: 19841011

PG1501 Laying open of application
PC1203 Withdrawal of no request for examination
WITN Application deemed withdrawn, e.g. because no request for examination was filed or no examination fee was paid