DE68924383T2 - Ineinander dispergierte zwei-phasige Ferrit-Zusammensetzung. - Google Patents

Ineinander dispergierte zwei-phasige Ferrit-Zusammensetzung.

Info

Publication number
DE68924383T2
DE68924383T2 DE68924383T DE68924383T DE68924383T2 DE 68924383 T2 DE68924383 T2 DE 68924383T2 DE 68924383 T DE68924383 T DE 68924383T DE 68924383 T DE68924383 T DE 68924383T DE 68924383 T2 DE68924383 T2 DE 68924383T2
Authority
DE
Germany
Prior art keywords
intermixed
ferrite composition
phase ferrite
phase
composition
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
DE68924383T
Other languages
English (en)
Other versions
DE68924383D1 (de
Inventor
Bijay Shanker C O Eastman Saha
Robert Edward C O Eastma Zeman
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Application granted granted Critical
Publication of DE68924383D1 publication Critical patent/DE68924383D1/de
Publication of DE68924383T2 publication Critical patent/DE68924383T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/10—Developers with toner particles characterised by carrier particles
    • G03G9/107—Developers with toner particles characterised by carrier particles having magnetic components
    • G03G9/1075—Structural characteristics of the carrier particles, e.g. shape or crystallographic structure
    • 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
    • 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
    • C01G49/0018—Mixed oxides or hydroxides
    • C01G49/0054—Mixed oxides or hydroxides containing one rare earth metal, yttrium or scandium
    • 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
    • C01G49/0063—Mixed oxides or hydroxides containing zinc
    • 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
    • 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
    • C01P2002/32—Three-dimensional structures spinel-type (AB2O4)
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/01—Particle morphology depicted by an image
    • C01P2004/03—Particle morphology depicted by an image obtained by SEM
    • 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
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • 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
    • C01P2006/11—Powder tap density
    • 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
DE68924383T 1988-08-05 1989-07-27 Ineinander dispergierte zwei-phasige Ferrit-Zusammensetzung. Expired - Fee Related DE68924383T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/229,366 US4855205A (en) 1988-08-05 1988-08-05 Interdispersed two-phase ferrite composite and carrier therefrom

Publications (2)

Publication Number Publication Date
DE68924383D1 DE68924383D1 (de) 1995-11-02
DE68924383T2 true DE68924383T2 (de) 1996-05-15

Family

ID=22860906

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68924383T Expired - Fee Related DE68924383T2 (de) 1988-08-05 1989-07-27 Ineinander dispergierte zwei-phasige Ferrit-Zusammensetzung.

Country Status (4)

Country Link
US (1) US4855205A (de)
EP (1) EP0353627B1 (de)
JP (1) JP2749651B2 (de)
DE (1) DE68924383T2 (de)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4855206A (en) * 1988-08-05 1989-08-08 Eastman Kodak Company Rare earth containing magnetic carrier particles
US5061586A (en) * 1990-04-05 1991-10-29 Eastman Kodak Company Glass composite magnetic carrier particles
US5106714A (en) * 1990-08-01 1992-04-21 Eastman Kodak Company Interdispersed two-phase ferrite composite and electrographic magnetic carrier particles therefrom
US5104761A (en) * 1990-09-14 1992-04-14 Eastman Kodak Company Interdispersed three-phase ferrite composite and electrographic magnetic carrier particles therefrom
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
US5190841A (en) * 1991-12-19 1993-03-02 Eastman Kodak Company Two-phase ferroelectric-ferromagnetic composite and carrier therefrom
DE69309801T2 (de) * 1992-07-22 1997-10-30 Canon Kk Trägerteilchen für die Elektrophotographie, Zweikomponententypentwickler und Bildherstellungsverfahren
US5306592A (en) * 1992-10-29 1994-04-26 Eastman Kodak Company Method of preparing electrographic magnetic carrier particles
US5268249A (en) * 1992-10-29 1993-12-07 Eastman Kodak Company Magnetic carrier particles
US5798198A (en) * 1993-04-09 1998-08-25 Powdertech Corporation Non-stoichiometric lithium ferrite carrier
US5616414A (en) * 1993-12-28 1997-04-01 Imation Corp. Hexagonal magnetic ferrite pigment for high density magnetic recording applications
US5422216A (en) * 1994-03-01 1995-06-06 Steward Developer composition and method of preparing the same
US5512404A (en) * 1994-08-29 1996-04-30 Eastman Kodak Company Developer compositions exhibiting high development speeds
US5500320A (en) * 1994-08-29 1996-03-19 Eastman Kodak Company High speed developer compositions with ferrite carriers
US5580655A (en) * 1995-03-03 1996-12-03 Dow Corning Corporation Silica nanoparticles
JP2897871B2 (ja) * 1995-08-11 1999-05-31 ティーディーケイ株式会社 磁石粉末、焼結磁石、ボンディッド磁石および磁気記録媒体
JP3261946B2 (ja) * 1995-10-12 2002-03-04 ミノルタ株式会社 静電荷像現像用キャリア
WO1999034376A1 (fr) * 1997-12-25 1999-07-08 Hitachi Metals, Ltd. Aimant en ferrite et son procede de production
US6528225B1 (en) 1998-03-09 2003-03-04 Xerox Corporation Carrier
US5998076A (en) * 1998-03-09 1999-12-07 Xerox Corporation Carrier
CA2375345A1 (en) * 2000-05-17 2001-11-22 Heidelberg Digital L.L.C. Method for using hard magnetic carriers in an electrographic process
US6723481B2 (en) 2000-05-17 2004-04-20 Heidelberger Druckmaschinen Ag Method for using hard magnetic carriers in an electrographic process
US6228549B1 (en) 2000-05-17 2001-05-08 Heidelberg Digital L.L.C. Magnetic carrier particles
US6232026B1 (en) 2000-05-17 2001-05-15 Heidelberg Digital L.L.C. Magnetic carrier particles
US6391509B1 (en) 2000-08-17 2002-05-21 Xerox Corporation Coated carriers
JP2002313618A (ja) * 2001-02-07 2002-10-25 Sumitomo Special Metals Co Ltd 永久磁石、およびその製造方法
US6511780B1 (en) 2001-07-30 2003-01-28 Xerox Corporation Carrier particles
US7162302B2 (en) 2002-03-04 2007-01-09 Nanoset Llc Magnetically shielded assembly
US7091412B2 (en) 2002-03-04 2006-08-15 Nanoset, Llc Magnetically shielded assembly
JP3744859B2 (ja) 2002-02-01 2006-02-15 三洋電機株式会社 成形体及びその製造方法
US7014971B2 (en) * 2003-03-07 2006-03-21 Xerox Corporation Carrier compositions
US20060199094A1 (en) 2005-03-07 2006-09-07 Xerox Corporation Carrier and developer compositions
JP4803730B2 (ja) * 2006-03-30 2011-10-26 パウダーテック株式会社 強磁性材料粉、電子写真現像剤用キャリア及びこれらの製造方法、並びに電子写真現像剤
JP5086681B2 (ja) * 2007-03-30 2012-11-28 Ｄｏｗａエレクトロニクス株式会社 電子写真現像剤用キャリア芯材およびその製造方法、電子写真現像剤用キャリア、並びに、電子写真現像剤
JP5692766B1 (ja) * 2014-01-20 2015-04-01 パウダーテック株式会社 外殻構造を有するフェライト粒子を用いた電子写真現像剤用フェライトキャリア芯材及びフェライトキャリア、並びに該フェライトキャリアを用いた電子写真現像剤

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2900344A (en) * 1953-07-29 1959-08-18 Philips Corp Making anisotropic permanent magnets
JPS51124434A (en) * 1975-04-22 1976-10-29 Ricoh Co Ltd Duplicating method for plural sheets
US3996392A (en) * 1975-10-29 1976-12-07 Xerox Corporation Humidity-insensitive ferrite developer materials
JPS55130862A (en) * 1979-03-27 1980-10-11 Toranosuke Kawaguchi Oxide permanent magnet
JPS6054907B2 (ja) * 1980-01-14 1985-12-02 富士電気化学株式会社 広温度範囲フエライト記憶磁心
JPS58202456A (ja) * 1982-04-07 1983-11-25 Hitachi Metals Ltd 電子写真用フエライトキヤリア−
JPS58215663A (ja) * 1982-06-08 1983-12-15 Hitachi Metals Ltd 電子写真用フエライトキヤリア−
JPS5994763A (ja) * 1982-11-22 1984-05-31 Mita Ind Co Ltd 磁気ブラシ現像用二成分系現像剤
JPS59127054A (ja) * 1983-01-11 1984-07-21 Hitachi Metals Ltd 電子写真用現像剤
US4540645A (en) * 1983-01-31 1985-09-10 Mita Industrial Co Ltd Magnetic brush development method
JPS59197047A (ja) * 1983-04-25 1984-11-08 Tomoegawa Paper Co Ltd 磁性カラ−トナ−
JPS607441A (ja) * 1983-06-28 1985-01-16 Canon Inc 磁性カラ−トナ−
JPS61296363A (ja) * 1985-06-26 1986-12-27 Mitsubishi Chem Ind Ltd 電子写真用被覆キヤリア
JPS62124564A (ja) * 1985-11-26 1987-06-05 Hitachi Metals Ltd 静電荷像現像用キヤリア
EP0265133A3 (de) * 1986-10-13 1990-01-10 Matsushita Electric Industrial Co., Ltd. Gemengtes magnetisches Pulver, Verfahren zu seiner Herstellung und Aufzeichnungsträger, der dieses Pulver enthält

Also Published As

Publication number Publication date
US4855205A (en) 1989-08-08
EP0353627A2 (de) 1990-02-07
JPH0288429A (ja) 1990-03-28
JP2749651B2 (ja) 1998-05-13
EP0353627A3 (de) 1991-10-02
EP0353627B1 (de) 1995-09-27
DE68924383D1 (de) 1995-11-02

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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