Title:
FERRITE PARTICLES, CARRIER CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPERS, FERRITE CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPERS, AND ELECTROPHOTOGRAPHIC DEVELOPER
Document Type and Number:
WIPO Patent Application WO/2019/198304
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing: ferrite particles having magnetic properties and electric properties suitable as a carrier core material for electrophotographic developers; and a carrier core material for electrophotographic developers, a ferrite carrier for electrophotographic developers and an electrophotographic developer, in each of which the ferrite particles are used. For the purpose of solving the problem, ferrite particles are provided, each of which has a spinel-type crystalline structure represented by the compositional formula: MnxFeyO4 (wherein 0 < x, y = 3-x), the ferrite particles being characterized in that the Mn occupation ratio in site A is 0.200 to 0.655 inclusive. Also provided are a carrier core material for electrophotographic developers, a ferrite carrier for electrophotographic developers, and an electrophotographic developer, each of which contains the ferrite particles.
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Inventors:
ISHII KAZUTAKA (JP)
AGA KOJI (JP)
AGA KOJI (JP)
Application Number:
PCT/JP2019/002767
Publication Date:
October 17, 2019
Filing Date:
January 28, 2019
Export Citation:
Assignee:
POWDERTECH CO LTD (JP)
International Classes:
C01G49/00; C04B35/36; G03G9/107; G03G9/113
Foreign References:
| JP2010085762A | 2010-04-15 | |||
| JPH0720657A | 1995-01-24 | |||
| JP2003156887A | 2003-05-30 | |||
| JP2008089869A | 2008-04-17 | |||
| CN102923786A | 2013-02-13 | |||
| JPH04345170A | 1992-12-01 | |||
| JP2009064008A | 2009-03-26 |
Other References:
MORRISH, A. H. ET AL.: "Origin of Elevated Ordering Temperature in MnFe2O4 Nanometer Particles", JOURNAL DE PHYSIQUE IV FRANCE, vol. 7, March 1997 (1997-03-01), pages Cl-513 - Cl-516
AMIR, MD. ET AL.: "Polyol synthesis of Mn3+ substituted Fe304 nanoparticles: Cation distribution, structural and electrical properties", SUPERLATTICES AND MICROSTRUCTURES, vol. 85, 2 July 2015 (2015-07-02), pages 747 - 760, XP029246987, DOI: 10.1016/j.spmi.2015.07.001
TAKAOBUSHI, J. ET AL.: "Electronic structures of Fe3-xMxO4 (M=Mn, Zn) spinel oxide thin films investigated by x-ray photoemission spectroscopy and x-ray magnetic circular dichroism", PHYSICAL REVIEW B, vol. 76, 15 November 2007 (2007-11-15), pages 2, XP55641743
AMIR, MD. ET AL.: "Polyol synthesis of Mn3+ substituted Fe304 nanoparticles: Cation distribution, structural and electrical properties", SUPERLATTICES AND MICROSTRUCTURES, vol. 85, 2 July 2015 (2015-07-02), pages 747 - 760, XP029246987, DOI: 10.1016/j.spmi.2015.07.001
TAKAOBUSHI, J. ET AL.: "Electronic structures of Fe3-xMxO4 (M=Mn, Zn) spinel oxide thin films investigated by x-ray photoemission spectroscopy and x-ray magnetic circular dichroism", PHYSICAL REVIEW B, vol. 76, 15 November 2007 (2007-11-15), pages 2, XP55641743
Attorney, Agent or Firm:
YOSHIMURA, Katsuhiro (JP)
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