BR9206517A - Pigmento magnético, meio de gravação magnética e processo para preparar partículas magnéticas de ferrita - Google Patents

Pigmento magnético, meio de gravação magnética e processo para preparar partículas magnéticas de ferrita

Info

Publication number
BR9206517A
BR9206517A BR9206517A BR9206517A BR9206517A BR 9206517 A BR9206517 A BR 9206517A BR 9206517 A BR9206517 A BR 9206517A BR 9206517 A BR9206517 A BR 9206517A BR 9206517 A BR9206517 A BR 9206517A
Authority
BR
Brazil
Prior art keywords
magnetic
recording medium
prepare
ferrite particles
pigment
Prior art date
Application number
BR9206517A
Other languages
English (en)
Inventor
David M Hopstock
John S Roden
Gunther H Dierssen
Ronald S Sapieszko
Original Assignee
Minnesota Mining & Mfg
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 Minnesota Mining & Mfg filed Critical Minnesota Mining & Mfg
Publication of BR9206517A publication Critical patent/BR9206517A/pt

Links

Classifications

    • 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
    • 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
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on 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
    • G11B5/62—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
    • C01P2002/30—Three-dimensional structures
    • 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
    • C01P2002/76—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by a space-group or by other symmetry indications
    • 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
    • C01P2004/22—Particle morphology extending in two dimensions, e.g. plate-like with a polygonal circumferential shape
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/54—Particles characterised by their aspect ratio, i.e. the ratio of sizes in the longest to the shortest dimension
    • 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
    • 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
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • Y10T428/257—Iron oxide or aluminum oxide
    • 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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/258—Alkali metal or alkaline earth metal or compound thereof
    • 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.]
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Nanotechnology (AREA)
  • Ceramic Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Structural Engineering (AREA)
  • Compounds Of Iron (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)
  • Paints Or Removers (AREA)
BR9206517A 1991-09-19 1992-08-10 Pigmento magnético, meio de gravação magnética e processo para preparar partículas magnéticas de ferrita BR9206517A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/762,596 US5378384A (en) 1991-09-19 1991-09-19 Process of making hexagonal magnetic ferrite pigment for high density magnetic recording applications
PCT/US1992/006671 WO1993006596A1 (en) 1991-09-19 1992-08-10 Hexagonal magnetic ferrite pigment for high density magnetic recording applications

Publications (1)

Publication Number Publication Date
BR9206517A true BR9206517A (pt) 1995-06-06

Family

ID=25065527

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9206517A BR9206517A (pt) 1991-09-19 1992-08-10 Pigmento magnético, meio de gravação magnética e processo para preparar partículas magnéticas de ferrita

Country Status (11)

Country Link
US (2) US5378384A (pt)
EP (1) EP0604472B1 (pt)
JP (1) JPH06511354A (pt)
AU (1) AU657358B2 (pt)
BR (1) BR9206517A (pt)
CA (1) CA2115669A1 (pt)
DE (1) DE69205987T2 (pt)
MX (1) MX9205051A (pt)
TW (1) TW201843B (pt)
WO (1) WO1993006596A1 (pt)
ZA (1) ZA926339B (pt)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3440741B2 (ja) * 1997-03-04 2003-08-25 戸田工業株式会社 磁気カード用マグネトプランバイト型フェライト粒子粉末
JP4961068B2 (ja) * 1999-12-28 2012-06-27 戸田工業株式会社 ボンド磁石用ストロンチウムフェライト粒子粉末及び該ストロンチウムフェライト粒子粉末を用いたボンド磁石
US20020045531A1 (en) * 2000-10-18 2002-04-18 Toru Suzuki Oriented sintered ceramic product and manufacturing method thereof
JP4697366B2 (ja) * 2000-12-07 2011-06-08 戸田工業株式会社 ボンド磁石用ストロンチウムフェライト粒子粉末及び該ストロンチウムフェライト粒子粉末を用いたボンド磁石
JP4001499B2 (ja) * 2002-04-03 2007-10-31 富士フイルム株式会社 磁気記録媒体
AU2003304097A1 (en) * 2003-05-07 2004-11-26 Meiji University Legal Person Spinel type ferrimagnetic powder and magnetic recording medium
JP2005340673A (ja) * 2004-05-28 2005-12-08 Asahi Techno Glass Corp 六方晶フェライト磁性粉末およびその製造方法
US7736380B2 (en) * 2004-12-21 2010-06-15 Rhausler, Inc. Cervical plate system
JP4820312B2 (ja) * 2006-03-31 2011-11-24 Ｄｏｗａエレクトロニクス株式会社 ボンド磁石用フェライト磁性粉およびその製造方法、並びにボンド磁石
WO2008091297A2 (en) * 2006-08-11 2008-07-31 Northeastern University Method of manufacturing thick-film, low microwave loss, self-biased barium-hexaferrite having perpendicular magnetic anisotropy
AU2008324777A1 (en) * 2007-11-05 2009-05-14 The Regents Of The University Of Colorado, A Body Corporate Metal ferrite spinel energy storage devices and methods for making and using same
KR101082389B1 (ko) * 2011-05-31 2011-11-11 쌍용머티리얼 주식회사 마그네토플럼바이트형 페라이트 자성재료 및 이로부터 유도된 세그멘트형 영구자석
JP5603901B2 (ja) * 2012-05-30 2014-10-08 富士フイルム株式会社 六方晶フェライト磁性粉末およびその製造方法、ならびに磁気記録媒体およびその製造方法
US11118140B2 (en) 2014-08-29 2021-09-14 Ecolab Usa Inc. Solid rinse aid composition comprising polyacrylic acid

Family Cites Families (30)

* 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
JPS586525A (ja) * 1981-07-02 1983-01-14 Toshiba Corp 磁気記録媒体
EP0072436B1 (de) * 1981-08-19 1986-10-01 BASF Aktiengesellschaft Verfahren zur Herstellung feinteiliger Ferritpulver
JPS5856302A (ja) * 1981-09-30 1983-04-04 Toshiba Corp 高密度磁気記録用磁性粉の製造方法
JPS59161002A (ja) * 1983-02-05 1984-09-11 Toda Kogyo Corp 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
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
US4529542A (en) * 1983-06-21 1985-07-16 The Kitasato Institute Novel proteinous substance KUD-PC and its production
JPS6069822A (ja) * 1983-08-19 1985-04-20 Toshiba Corp 磁気記録媒体
JPS6070518A (ja) * 1983-09-28 1985-04-22 Toshiba Corp 磁気記録媒体
JPS6077129A (ja) * 1983-09-30 1985-05-01 Toshiba Corp バリウムフエライト磁性粉
JPS60109021A (ja) * 1983-11-17 1985-06-14 Hitachi Maxell Ltd 磁気記録媒体
US4699771A (en) * 1984-05-14 1987-10-13 Kabushiki Kaisha Toshiba Magnetic recording powder, method of manufacturing thereof and application thereof
KR900000429B1 (ko) * 1984-05-31 1990-01-30 도다 교오교오 가부시끼가이샤 자기 기록용 판상 아철산 바륨입자와 그 제조방법
JPH0719363B2 (ja) * 1984-11-30 1995-03-06 日立マクセル株式会社 磁気記録媒体
US4714654A (en) * 1984-12-20 1987-12-22 Kabushiki Kaisha Toshiba Magnetic recording medium
DE3537624A1 (de) * 1985-10-23 1987-04-23 Bayer Ag Feinteilige isometrische hexaferritpigmente, verfahren zu ihrer herstellung und deren verwendung
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
JPS62297216A (ja) * 1986-06-16 1987-12-24 Kawasaki Steel Corp Ｂａフエライト微粒子の製造方法
DE3729693A1 (de) * 1986-09-05 1988-05-05 Sony Corp Verfahren zur herstellung feiner bariumferritteilchen
US4820433A (en) * 1986-09-05 1989-04-11 Nippon Zeon Co., Ltd. Magnetic powder for magnetic recording
US4781852A (en) * 1986-10-24 1988-11-01 Olin Corporation Process for making selected doped barium and strontium hexaferrite particles
DE3702036A1 (de) * 1987-01-24 1988-08-04 Basf Ag Feststoff zur herstellung hexagonaler ferrite
US4778734A (en) * 1987-02-03 1988-10-18 Ube Industries, Ltd. Barium ferrite magnetic powder and magnetic recording medium containing 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
DE3721767A1 (de) * 1987-07-01 1989-01-12 Bayer Ag Verfahren zur herstellung feinteiliger bariumhexaferritpigmente aus halogenidschmelzen sowie die verwendung derartig hergestellter bariumhexaferritpigmente
JPH01111728A (ja) * 1987-10-23 1989-04-28 Showa Denko Kk 六角板状バリウムフェライトの製造方法
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
US4855205A (en) * 1988-08-05 1989-08-08 Eastman Kodak Company Interdispersed two-phase ferrite composite and carrier therefrom
DE3842015A1 (de) * 1988-12-14 1990-07-05 Bayer Ag Verfahren zur herstellung feinteiliger magnetischer hexaferrite durch spruehtrocknen von bariumsalzen mit eisenoxiden sowie die verwendung so erhaltener hexaferrite
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
MX9205051A (es) 1993-03-01
DE69205987T2 (de) 1996-07-04
TW201843B (pt) 1993-03-11
WO1993006596A1 (en) 1993-04-01
DE69205987D1 (de) 1995-12-14
EP0604472B1 (en) 1995-11-08
ZA926339B (en) 1993-03-15
CA2115669A1 (en) 1993-04-01
US5626956A (en) 1997-05-06
US5378384A (en) 1995-01-03
EP0604472A1 (en) 1994-07-06
JPH06511354A (ja) 1994-12-15
AU657358B2 (en) 1995-03-09
AU2471692A (en) 1993-04-27

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Legal Events

Date Code Title Description
EE Request for examination
FB36 Technical and formal requirements: requirement - article 36 of industrial property law
FA8 Dismissal: dismissal - article 36, par. 1 of industrial property law