| 发明名称 |
FERRITE PARTICLE, ELECTROPHOTOGRAPHIC CARRIER USING THE SAME, AND ELECTROPHOTOGRAPHIC DEVELOPER |
| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ferrite particle that enables sufficient image density even if an image forming speed is increased when used as a carrier of an electrophotographic image forming device. <P>SOLUTION: The ferrite particle is mainly composed of a material represented by a composition formula M<SB POS="POST">X</SB>Fe<SB POS="POST">3-X</SB>O<SB POS="POST">4</SB>(M is at least one of Mg and Mn, and 0≤X≤1), and contains at least one of Sr element and Ca element in the range of 0.1 to 2.5 weight percent in total. When the ferrite particle is used as a carrier, the fluidity is preferably 40 seconds or higher after magnetized under a magnetic field of 1000/(4π)kA/m (1000 Oersted) for higher image density. The residual magnetization σr is preferably 3Am<SP POS="POST">2</SP>/kg or more. <P>COPYRIGHT: (C)2013,JPO&INPIT |
| 申请公布号 |
JP2012203140(A) |
申请公布日期 |
2012.10.22 |
| 申请号 |
JP20110066647 |
申请日期 |
2011.03.24 |
| 申请人 |
DOWA ELECTRONICS MATERIALS CO LTD;DOWA IP CREATION CO LTD |
发明人 |
YAMADA TOMOYA;IIDA TOMOHIDE |
| 分类号 |
G03G9/107;G03G9/113 |
主分类号 |
G03G9/107 |
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