发明公开
EP2980023A1 FERRITE PARTICLES AND ELECTROPHOTOGRAPHIC DEVELOPER CARRIER USING SAME, ELECTROPHOTOGRAPHIC DEVELOPER, AND METHOD FOR PRODUCING FERRITE PARTICLES
审中-公开
铁氧体颗粒和使用该载体的电子照相显影剂载体，电子照相显影剂和生产铁氧体颗粒的方法
- 专利标题： FERRITE PARTICLES AND ELECTROPHOTOGRAPHIC DEVELOPER CARRIER USING SAME, ELECTROPHOTOGRAPHIC DEVELOPER, AND METHOD FOR PRODUCING FERRITE PARTICLES
- 专利标题（中）： 铁氧体颗粒和使用该载体的电子照相显影剂载体，电子照相显影剂和生产铁氧体颗粒的方法
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申请号： EP14775103.6申请日： 2014-02-26
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公开(公告)号： EP2980023A1公开(公告)日： 2016-02-03
- 发明人: Kawauchi Takeshi , Ogawa Shou , Matsuda Yukihiro
- 申请人： Dowa Electronics Materials Co., Ltd. , Dowa IP Creation Co., Ltd.
- 申请人地址： 14-1 Sotokanda 4-chome Chiyoda-ku Tokyo 101-0021 JP
- 专利权人： Dowa Electronics Materials Co., Ltd.,Dowa IP Creation Co., Ltd.
- 当前专利权人： Dowa Electronics Materials Co., Ltd.,Dowa IP Creation Co., Ltd.
- 当前专利权人地址： 14-1 Sotokanda 4-chome Chiyoda-ku Tokyo 101-0021 JP
- 代理机构： Müller-Boré & Partner Patentanwälte PartG mbB
- 优先权： JP2013069622 20130328
- 国际公布： WO2014156437 20141002
- 主分类号： C01G49/00
- IPC分类号： C01G49/00 ; G03G9/107 ; G03G9/113
摘要：
There are provided ferrite particles in which Mn ferrite is used as the main phase and which contain Sr ferrite, where the degree of projections and recesses in the surface of the particles falls within a range of 2.5 to 4.5 µm, and the standard deviation of the size of grains appearing on the surface of the particles falls within a range of 1.5 to 3.5 µm. In this way, a coating resin is left on the surface of the particles even after long-term use and thus a decrease in the charging property is reduced.
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