JPS58123550A - Electrophotographic developing carrier - Google Patents

Electrophotographic developing carrier

Info

Publication number
JPS58123550A
JPS58123550A JP647182A JP647182A JPS58123550A JP S58123550 A JPS58123550 A JP S58123550A JP 647182 A JP647182 A JP 647182A JP 647182 A JP647182 A JP 647182A JP S58123550 A JPS58123550 A JP S58123550A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
lt
carrier
gt
ferrite
30mol
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
JP647182A
Inventor
Tsutomu Iimura
Hajime Shinohara
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
    • G03G9/1075Carrier particles having a multi-layered structure; Carrier particles comprising a core

Abstract

PURPOSE:To obtain a carrier superior in image characteristics and long in service life, by specifying proportions of the components of ferrite consisting of MgO, MnO, Fe2O3, and ZnO, its electromagnetic characteristics, its particle diameter, and its surface state. CONSTITUTION:This ferrite consists of 1-40mol% MgO, 0.5-30mol% MnO, 45- 60mol% Fe2O3, and 0.1-30mol% ZnO, and it has 10<3>-10<12>ohm.cm, 15-80emu/ g saturation magnetization value, <=10Oe coercive force Hc, <=10 magnetic permeability mu, >=50 deg.C Curie temp. Tc, and 5-500 average particle diameter. It is spherical and the surface of each particle is oxidized or coated with a resin. As a result of copying test of this prepared sample of this carrier, 70,000-100,000 sharp copies were obtained as compared with 50,000 copies obtained with usual ferrite carrier in all its service life.
JP647182A 1982-01-19 1982-01-19 Electrophotographic developing carrier Pending JPS58123550A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP647182A JPS58123550A (en) 1982-01-19 1982-01-19 Electrophotographic developing carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP647182A JPS58123550A (en) 1982-01-19 1982-01-19 Electrophotographic developing carrier

Publications (1)

Publication Number Publication Date
JPS58123550A true true JPS58123550A (en) 1983-07-22

Family

ID=11639364

Family Applications (1)

Application Number Title Priority Date Filing Date
JP647182A Pending JPS58123550A (en) 1982-01-19 1982-01-19 Electrophotographic developing carrier

Country Status (1)

Country Link
JP (1) JPS58123550A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58145621A (en) * 1982-02-12 1983-08-30 Tdk Corp Magnetic carrier particle
JPS58145622A (en) * 1982-02-12 1983-08-30 Tdk Corp Magnetic carrier particle
JPS6090345A (en) * 1983-10-24 1985-05-21 Fuji Xerox Co Ltd Developer carrier for electrophotographic copying machine
US4592988A (en) * 1984-08-15 1986-06-03 Halomet, Inc. Ferrite toner carrier core composition derived from fly ash
US4698289A (en) * 1984-08-15 1987-10-06 Halomet Inc. Process for making ferrite spherical particulate toner core from raw fly ash
JPS63216060A (en) * 1987-03-05 1988-09-08 Hitachi Metals Ltd Carrier particles for developing electrostatic charge image
JPS63220258A (en) * 1987-03-10 1988-09-13 Hitachi Metals Ltd Electrostatic charge image developer
JPH01301524A (en) * 1988-05-28 1989-12-05 Fuji Elelctrochem Co Ltd Magnesium-zinc-based ferrite material
JPH02267566A (en) * 1989-04-10 1990-11-01 Tomoegawa Paper Co Ltd Developer for reversal development
JP2015182905A (en) * 2014-03-20 2015-10-22 パウダーテック株式会社 Ferrite particle for functional powder transportation
WO2016043051A1 (en) * 2014-09-19 2016-03-24 パウダーテック株式会社 Nanosized spherical ferrite particles and method for manufacturing same

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58145622A (en) * 1982-02-12 1983-08-30 Tdk Corp Magnetic carrier particle
JPS6237782B2 (en) * 1982-02-12 1987-08-14 Tdk Electronics Co Ltd
JPS6237783B2 (en) * 1982-02-12 1987-08-14 Tdk Electronics Co Ltd
JPS58145621A (en) * 1982-02-12 1983-08-30 Tdk Corp Magnetic carrier particle
JPH0419546B2 (en) * 1983-10-24 1992-03-30 Fuji Zerotsukusu Kk
JPS6090345A (en) * 1983-10-24 1985-05-21 Fuji Xerox Co Ltd Developer carrier for electrophotographic copying machine
US4592988A (en) * 1984-08-15 1986-06-03 Halomet, Inc. Ferrite toner carrier core composition derived from fly ash
US4698289A (en) * 1984-08-15 1987-10-06 Halomet Inc. Process for making ferrite spherical particulate toner core from raw fly ash
JPS63216060A (en) * 1987-03-05 1988-09-08 Hitachi Metals Ltd Carrier particles for developing electrostatic charge image
JPS63220258A (en) * 1987-03-10 1988-09-13 Hitachi Metals Ltd Electrostatic charge image developer
JPH01301524A (en) * 1988-05-28 1989-12-05 Fuji Elelctrochem Co Ltd Magnesium-zinc-based ferrite material
JPH02267566A (en) * 1989-04-10 1990-11-01 Tomoegawa Paper Co Ltd Developer for reversal development
JP2015182905A (en) * 2014-03-20 2015-10-22 パウダーテック株式会社 Ferrite particle for functional powder transportation
WO2016043051A1 (en) * 2014-09-19 2016-03-24 パウダーテック株式会社 Nanosized spherical ferrite particles and method for manufacturing same
JPWO2016043051A1 (en) * 2014-09-19 2017-04-27 パウダーテック株式会社 Spherical ferrite particles and a method of manufacturing nano-sized

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