KR850008031A - 자기 기록용 판상 아철산 바륨입자와 그 제조방법 - Google Patents

자기 기록용 판상 아철산 바륨입자와 그 제조방법 Download PDF

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Publication number
KR850008031A
KR850008031A KR1019850003666A KR850003666A KR850008031A KR 850008031 A KR850008031 A KR 850008031A KR 1019850003666 A KR1019850003666 A KR 1019850003666A KR 850003666 A KR850003666 A KR 850003666A KR 850008031 A KR850008031 A KR 850008031A
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South Korea
Prior art keywords
plate
magnetic recording
barium ferrite
particles
bafe
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KR1019850003666A
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English (en)
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KR900000429B1 (ko
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노리미찌 나가이 (외 4)
Original Assignee
마쓰이 고로오 (외 1)
도다 교오교오 가부시끼 가이샤
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Priority claimed from JP59112521A external-priority patent/JPS60255629A/ja
Priority claimed from JP59112520A external-priority patent/JPS60255628A/ja
Application filed by 마쓰이 고로오 (외 1), 도다 교오교오 가부시끼 가이샤 filed Critical 마쓰이 고로오 (외 1)
Publication of KR850008031A publication Critical patent/KR850008031A/ko
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Publication of KR900000429B1 publication Critical patent/KR900000429B1/ko

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    • 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
    • H01F1/10—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/0018—Mixed oxides or hydroxides
    • C01G49/0036—Mixed oxides or hydroxides containing one alkaline earth metal, magnesium or lead
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/009—Compounds containing, besides iron, two or more other elements, with the exception of oxygen or hydrogen
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G51/00—Compounds of cobalt
    • C01G51/006—Compounds containing, besides cobalt, two or more other elements, with the exception of oxygen or hydrogen
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/50—Solid solutions
    • C01P2002/52—Solid solutions containing elements as dopants
    • C01P2002/54—Solid solutions containing elements as dopants one element only
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
    • 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
    • C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
    • 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
    • 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
    • C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Nanotechnology (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Composite Materials (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Power Engineering (AREA)
  • Compounds Of Iron (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

내용 없음

Description

자기 기록용 판상 아철산 바륨입자와 그 제조방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 실시예 1에서 얻은 검은 갈색입자의 X-ray 회절패턴.
제2도는 본 발명의 실시예 5에서 얻은 검은 갈색입자의 X-ray 회절패턴.

Claims (2)

  1. 다음 일반식
    BaFe12-2XMXTiXO19
    (상기 식에서 X는 0-1.2, M은 Co(Ⅱ) 또는 Co(Ⅲ) 및 Co(Ⅱ) 이외의 2가 금속이온을 나타낸다)로 표시되는 판상입자로 이루어지며, 상기 판상입자의 표면이 일반식 FeOy· Fe2O3(y는 0 이상 1 이하)로 표시되는 자철광으로 변화되고, 자기장 10KOe에서 40emu/g 이상의 자화(M), 300 내지 1000Oe의 보자력 및 0.05 내지 0.3μm의 평균입자직정을 나타내는 것을 특징으로 하는 판상 아철산 바륨입자.
  2. 다음 일반식
    BaFe12-2XMXTiXO19
    (상기 식에서 X는 0-12, M은 Co(Ⅱ) 또는 Co(Ⅱ) 및 Co(Ⅱ) 이외의 다른 2가 금속이온을 나타낸다)로 표시되는 판상입자를 상기 판상입자의 총 Fe(Ⅲ)에 대한 Fe(Ⅱ) 50원자% 이하를 포함하는 Fe(OH)2의 수성알카리 (pH 8.0 내지 14) 현타액과 혼합하고, 비-산화성 분위기에서 50 내지 100℃의 온도로 제조된 수성 혼합물을 열적으로 처리하므로써, BaFe12-2XMXTiXO19(X와 M은 상기와 같음)의 상기 판상입자의 표면이 FeOy · Fe2O3(y는 0 이상 1 이하)으로 변화되는 것을 특징으로 하는 자기기록에 사용하기 위한 판상입자를 제조하는 방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019850003666A 1984-05-31 1985-05-28 자기 기록용 판상 아철산 바륨입자와 그 제조방법 KR900000429B1 (ko)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP59-112520 1984-05-31
JP112520 1984-05-31
JP112521 1984-05-31
JP59112521A JPS60255629A (ja) 1984-05-31 1984-05-31 磁気記録用板状Ｂａフェライト微粒子粉末及びその製造法
JP59112520A JPS60255628A (ja) 1984-05-31 1984-05-31 磁気記録用板状Ｂａフエライト微粒子粉末及びその製造法

Publications (2)

Publication Number Publication Date
KR850008031A true KR850008031A (ko) 1985-12-11
KR900000429B1 KR900000429B1 (ko) 1990-01-30

Family

ID=26451660

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019850003666A KR900000429B1 (ko) 1984-05-31 1985-05-28 자기 기록용 판상 아철산 바륨입자와 그 제조방법

Country Status (4)

Country Link
US (1) US4584242A (ko)
EP (1) EP0164251B1 (ko)
KR (1) KR900000429B1 (ko)
DE (1) DE3571964D1 (ko)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6042804A (ja) * 1983-08-18 1985-03-07 Hitachi Maxell Ltd 磁気記録媒体及び磁気記録媒体用磁性粉末
US4714654A (en) * 1984-12-20 1987-12-22 Kabushiki Kaisha Toshiba Magnetic recording medium
DE3773008D1 (de) * 1986-01-29 1991-10-24 Toda Kogyo Corp Plaettchenfoermige bariumferritteilchen fuer magnetische aufzeichnung und verfahren zu ihrer herstellung.
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
US4772522A (en) * 1986-07-21 1988-09-20 Tdk Corporation Magnetic recording medium
EP0265133A3 (en) * 1986-10-13 1990-01-10 Matsushita Electric Industrial Co., Ltd. Composite magnetic powder, method for producing the same and recording medium containing the same
US4781852A (en) * 1986-10-24 1988-11-01 Olin Corporation Process for making selected doped barium and strontium hexaferrite particles
US4781981A (en) * 1986-12-19 1988-11-01 Toda Kogyo Corp. Plate-like magnetoplumbite ferrite particles for magnetic recording and process for producing the same
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
JPH0725553B2 (ja) * 1987-05-07 1995-03-22 松下電器産業株式会社 板状磁性粉体の製造方法
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
JP2791562B2 (ja) * 1988-10-24 1998-08-27 戸田工業株式会社 Ｂａ及びＦｅを主成分として含む板状酸化物微粒子粉末及びその製造法
US5378384A (en) * 1991-09-19 1995-01-03 Minnesota Mining And Manufacturing Company Process of making hexagonal magnetic ferrite pigment for high density magnetic recording applications
US5616414A (en) * 1993-12-28 1997-04-01 Imation Corp. Hexagonal magnetic ferrite pigment for high density magnetic recording applications
CN1042626C (zh) * 1995-07-06 1999-03-24 南京理工大学 超细六角晶系铁氧体的制备方法
SE527816C8 (sv) * 2004-03-19 2006-09-12 Mekanism med varabel transmission

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3093589A (en) * 1961-05-11 1963-06-11 Columbian Carbon Magnetic material
JPS5667904A (en) * 1979-11-08 1981-06-08 Toshiba Corp Preparation method of megnetic powder for high density magnetic recording
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
EP0072437B1 (de) * 1981-08-19 1987-01-07 BASF Aktiengesellschaft Verfahren zur Herstellung feinteiliger Ferritpulver
JPS59151339A (ja) * 1983-02-16 1984-08-29 Fuji Photo Film Co Ltd 磁気記録用フエライト磁性体とその製法
JPS60137002A (ja) * 1983-12-26 1985-07-20 Toda Kogyo Corp 磁気記録用板状Ｂａフエライト微粒子粉末の製造法

Also Published As

Publication number Publication date
EP0164251B1 (en) 1989-08-02
DE3571964D1 (en) 1989-09-07
EP0164251A2 (en) 1985-12-11
KR900000429B1 (ko) 1990-01-30
EP0164251A3 (en) 1986-12-10
US4584242A (en) 1986-04-22

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