JPS6428234A - Production of magnetic carrier - Google Patents

Production of magnetic carrier

Info

Publication number
JPS6428234A
JPS6428234A JP63150879A JP15087988A JPS6428234A JP S6428234 A JPS6428234 A JP S6428234A JP 63150879 A JP63150879 A JP 63150879A JP 15087988 A JP15087988 A JP 15087988A JP S6428234 A JPS6428234 A JP S6428234A
Authority
JP
Japan
Prior art keywords
carrier particles
ferrite
magnetic carrier
partial pressure
atomic ratio
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.)
Granted
Application number
JP63150879A
Other languages
Japanese (ja)
Other versions
JPH0623870B2 (en
Inventor
Kenji Imamura
Hiroshi Saito
Katsuhisa Kakizaki
Motohiko Makino
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.)
TDK Corp
Original Assignee
TDK Corp
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 TDK Corp filed Critical TDK Corp
Priority to JP63150879A priority Critical patent/JPH0623870B2/en
Publication of JPS6428234A publication Critical patent/JPS6428234A/en
Publication of JPH0623870B2 publication Critical patent/JPH0623870B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G03G9/108—Ferrite carrier, e.g. magnetite
    • G03G9/1085—Ferrite carrier, e.g. magnetite with non-ferrous metal oxide, e.g. MgO-Fe2O3

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Compounds Of Iron (AREA)

Abstract

PURPOSE:To make it possible to provide a remarkable change in resistance values of ferrite carrier particles and readily obtain a toner image of desired image quality, by changing an oxygen partial pressure in a firing atmosphere in producing magnetic carrier particles of a ferrite consisting of a specific composition. CONSTITUTION:Magnetic carrier particles of a ferrite having a composition represented by the general formula (MO)100-X(Fe2O3)X expressed in terms of bivalent or trivalent metallic oxides are produced by firing. In the process, the oxygen partial pressure in a firing atmosphere is changed so as to provide a copied toner image of desired image quality and afford a desired value of particle resistance. In the above-mentioned formula, M represents any of Mn, Zn, Mn+Zn, Mn+Mg, Mn+Mg+Zn, Mn+Mg+Cu and Mn+Mg+Zn+Cu, provided that the atomic ratio of Mn in M is <=0.05 if M contains Mn and one or more other elements. Furthermore, if M contains Mg, the atomic ratio of Mg in M is <0.05. In addition, x is >53mol.%.
JP63150879A 1988-06-17 1988-06-17 Image forming method Expired - Lifetime JPH0623870B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63150879A JPH0623870B2 (en) 1988-06-17 1988-06-17 Image forming method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63150879A JPH0623870B2 (en) 1988-06-17 1988-06-17 Image forming method

Publications (2)

Publication Number Publication Date
JPS6428234A true JPS6428234A (en) 1989-01-30
JPH0623870B2 JPH0623870B2 (en) 1994-03-30

Family

ID=15506380

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63150879A Expired - Lifetime JPH0623870B2 (en) 1988-06-17 1988-06-17 Image forming method

Country Status (1)

Country Link
JP (1) JPH0623870B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0843225A2 (en) * 1994-06-22 1998-05-20 Canon Kabushiki Kaisha Carrier for electrophotography, two component-type developer and image forming method
JP2009234839A (en) * 2008-03-26 2009-10-15 Powdertech Co Ltd Ferrite particle and production method thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5565406A (en) * 1978-10-27 1980-05-16 Tdk Corp Ferrite powder for magnetic toner for use in electronic photograph and its preparation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5565406A (en) * 1978-10-27 1980-05-16 Tdk Corp Ferrite powder for magnetic toner for use in electronic photograph and its preparation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0843225A2 (en) * 1994-06-22 1998-05-20 Canon Kabushiki Kaisha Carrier for electrophotography, two component-type developer and image forming method
EP0843225A3 (en) * 1994-06-22 1998-07-08 Canon Kabushiki Kaisha Carrier for electrophotography, two component-type developer and image forming method
JP2009234839A (en) * 2008-03-26 2009-10-15 Powdertech Co Ltd Ferrite particle and production method thereof

Also Published As

Publication number Publication date
JPH0623870B2 (en) 1994-03-30

Similar Documents

Publication Publication Date Title
JPS5565406A (en) Ferrite powder for magnetic toner for use in electronic photograph and its preparation
JPS5691912A (en) Mandrel for piercing mill
GB2016526A (en) Production of magnetic powder
EP0105375B1 (en) Oxide-containing magnetic material capable of being sintered at low temperatures
JPS6428234A (en) Production of magnetic carrier
JPS5585426A (en) Magnetic powder for toner or ink and production thereof
JPS6428233A (en) Production of magnetic carrier
GB1436228A (en) Magnetic head and method of making same
JPS56156706A (en) Manufacture of magnetic metallic powder
JPS6428236A (en) Production of magnetic carrier
JPS5723002A (en) Manufacture of magnetic metal powder
JPS5723003A (en) Manufacture of magnetic metal powder
JPS55133505A (en) Manufacture of needle ferromagnetic metal particle powder for magnetic memory material
EP0400550A3 (en) Soft magnetic alloy, method for making, magnetic core, magnetic shield and compressed powder core using the same
JPS56166312A (en) Manufacture of metallic magnetic powder
JPS5617003A (en) Material for permanent magnet
JPS57145034A (en) Cleavable magnetic iron oxide and its production
JPS6427206A (en) Ferromagnetic fine powder for magnetic recording and manufacture thereof
JPS56137602A (en) Magnetic recording body
JPS5561006A (en) Sintering magnetic material
JPS57207101A (en) Production of sintered alnico magnet
JPS6486504A (en) Powder for magnetic shielding and magnetic shielding material
GB880865A (en) Improvements in or relating to ferromagnetic ferrite materials
KR940011361A (en) Manufacturing method of hexagonal ferrite fine powder for high density magnetic recording
JPS5665944A (en) Manufacture of iron sand sintered ore