JPS62297857A - Ferrite carrier for electrophotographic development - Google Patents

Ferrite carrier for electrophotographic development

Info

Publication number
JPS62297857A
JPS62297857A JP14033486A JP14033486A JPS62297857A JP S62297857 A JPS62297857 A JP S62297857A JP 14033486 A JP14033486 A JP 14033486A JP 14033486 A JP14033486 A JP 14033486A JP S62297857 A JPS62297857 A JP S62297857A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
gt
ferrite carrier
lt
carrier
formed
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.)
Pending
Application number
JP14033486A
Inventor
Tsutomu Iimura
Original Assignee
Hitachi Metals Ltd
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

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00Developers
    • G03G9/08Developers with toner particles
    • G03G9/10Developers with toner particles characterised by carrier particles
    • G03G9/107Developers with toner particles characterised by carrier particles having magnetic components

Abstract

PURPOSE:To provide a ferrite carrier having the higher resistance and the longer life and use such carrier as a developer for various kinds of electronic apparatus by using basic components having prescribed values of molar ratios of Li2O, MnO and Fe2O3 in the form of spherical particles having 10-500mum average grain size. CONSTITUTION:The basic components consisting of 2-15% Li2O, 3-50% MnO and 55-95% Fe2O3 in molar ratio are used for the ferrite carrier and are formed as the spherical particles having 10-500mum average grain size. The particles are formed to have the characteristics of >=5kg/mm<2> breaking strength and >=10<2>OMEGA/cm electric resistivity of the ferrite carrier. The ferrite carrier is further formed to have 55-75emu/g satd. magnetization value, <=50Oe coercive force, >=20 initial magnetic permeability and <=100 deg.C Curie point, by which the ferrite carrier having the higher resistance and the longer life is obtd.
JP14033486A 1986-06-18 1986-06-18 Ferrite carrier for electrophotographic development Pending JPS62297857A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14033486A JPS62297857A (en) 1986-06-18 1986-06-18 Ferrite carrier for electrophotographic development

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14033486A JPS62297857A (en) 1986-06-18 1986-06-18 Ferrite carrier for electrophotographic development

Publications (1)

Publication Number Publication Date
JPS62297857A true true JPS62297857A (en) 1987-12-25

Family

ID=15266408

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14033486A Pending JPS62297857A (en) 1986-06-18 1986-06-18 Ferrite carrier for electrophotographic development

Country Status (1)

Country Link
JP (1) JPS62297857A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01223471A (en) * 1988-03-03 1989-09-06 Canon Inc Carrier for electrophotography
JPH02291565A (en) * 1989-05-02 1990-12-03 Canon Inc Magenta developer for full-color electrophotography
JPH02293862A (en) * 1989-05-09 1990-12-05 Canon Inc Magenta developer for full-color electrophotography
JPH02293861A (en) * 1989-05-09 1990-12-05 Canon Inc Magenta developer for full-color electrophotography
JPH02304458A (en) * 1989-05-19 1990-12-18 Hitachi Ltd Electrophotographic device
EP0689102A1 (en) * 1994-06-22 1995-12-27 Canon Kabushiki Kaisha Magnetic particles for charging means, and electrophotographic apparatus, process cartridge and image forming method including same
EP0689100A1 (en) 1994-06-22 1995-12-27 Canon Kabushiki Kaisha Carrier for electrophotography, two component type developer, and image forming method
US5876893A (en) * 1996-03-01 1999-03-02 Hitachi Metals, Ltd. Ferrite carrier, two-component developer and electrostatic imaging method using the developer
US5976747A (en) * 1998-01-08 1999-11-02 Powdertech Co., Ltd. Ferrite carrier for electrophotographic developer and electrophotographic developer containing the same
US6143456A (en) * 1999-11-24 2000-11-07 Xerox Corporation Environmentally friendly ferrite carrier core, and developer containing same
JP2009244570A (en) * 2008-03-31 2009-10-22 Mitsui Mining & Smelting Co Ltd Carrier core material for electrophotographic developer, carrier, and electrophotographic developer using carrier
JP2009244571A (en) * 2008-03-31 2009-10-22 Mitsui Mining & Smelting Co Ltd Carrier core material for electrophotographic developer, carrier, and electrophotographic developer using carrier

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01223471A (en) * 1988-03-03 1989-09-06 Canon Inc Carrier for electrophotography
JPH02291565A (en) * 1989-05-02 1990-12-03 Canon Inc Magenta developer for full-color electrophotography
JPH02293862A (en) * 1989-05-09 1990-12-05 Canon Inc Magenta developer for full-color electrophotography
JPH02293861A (en) * 1989-05-09 1990-12-05 Canon Inc Magenta developer for full-color electrophotography
JPH02304458A (en) * 1989-05-19 1990-12-18 Hitachi Ltd Electrophotographic device
EP0689102A1 (en) * 1994-06-22 1995-12-27 Canon Kabushiki Kaisha Magnetic particles for charging means, and electrophotographic apparatus, process cartridge and image forming method including same
US6316156B1 (en) 1994-06-22 2001-11-13 Canon Kabushiki Kaisha Carrier for electrophotography, two component type developer, and image forming method
EP0689100A1 (en) 1994-06-22 1995-12-27 Canon Kabushiki Kaisha Carrier for electrophotography, two component type developer, and image forming method
US5876893A (en) * 1996-03-01 1999-03-02 Hitachi Metals, Ltd. Ferrite carrier, two-component developer and electrostatic imaging method using the developer
US5976747A (en) * 1998-01-08 1999-11-02 Powdertech Co., Ltd. Ferrite carrier for electrophotographic developer and electrophotographic developer containing the same
US6143456A (en) * 1999-11-24 2000-11-07 Xerox Corporation Environmentally friendly ferrite carrier core, and developer containing same
JP2009244570A (en) * 2008-03-31 2009-10-22 Mitsui Mining & Smelting Co Ltd Carrier core material for electrophotographic developer, carrier, and electrophotographic developer using carrier
JP2009244571A (en) * 2008-03-31 2009-10-22 Mitsui Mining & Smelting Co Ltd Carrier core material for electrophotographic developer, carrier, and electrophotographic developer using carrier

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