Title:
FERRITE PARTICLES, ELECTROPHOTOGRAPHY CARRIER USING SAME, AND ELECTROPHOTOGRAPHY DEVELOPER
Document Type and Number:
WIPO Patent Application WO/2012/128236
Kind Code:
A1
Abstract:
Provided are ferrite particles containing a material represented by the compositional formula MXFe3-XO4 (wherein M denotes at least one among Mg and Mn, and 0 ≤ X ≤ 1) as a primary component, and containing at least one of elemental Sr and elemental Ca at a total content of 0.1 wt.% to 2.5 wt.%. When the ferrite particles are used as a carrier, the flow rate following magnetization in a magnetic field having a magnetic field strength of 1000/(4π) kA/m (1000 oersted) is preferably 40 seconds or more in order to obtain higher image density. In addition, the residual magnetization (σr) is preferably 3 Am2/kg or higher.
Inventors:
YAMADA TOMOYA (JP)
IIDA TOMOHIDE (JP)
IIDA TOMOHIDE (JP)
Application Number:
PCT/JP2012/056955
Publication Date:
September 27, 2012
Filing Date:
March 19, 2012
Export Citation:
Assignee:
DOWA ELECTRONICS MATERIALS CO (JP)
DOWA IP CREATION CO LTD (JP)
YAMADA TOMOYA (JP)
IIDA TOMOHIDE (JP)
DOWA IP CREATION CO LTD (JP)
YAMADA TOMOYA (JP)
IIDA TOMOHIDE (JP)
International Classes:
G03G9/107; G03G9/113
Foreign References:
| JP2010181524A | 2010-08-19 | |||
| JP2010039368A | 2010-02-18 | |||
| JP2010243798A | 2010-10-28 | |||
| JP2011008199A | 2011-01-13 | |||
| JPS6263970A | 1987-03-20 | |||
| JP2010066490A | 2010-03-25 |
Other References:
See also references of EP 2690499A4
Attorney, Agent or Firm:
YAMADA SHIGEKI (JP)
Shigeki Yamada (JP)
Shigeki Yamada (JP)
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Claims:
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