发明名称 |
METHOD FOR PRODUCING CARRIER CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPER, CARRIER CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPER, CARRIER FOR ELECTROPHOTOGRAPHIC DEVELOPER, AND ELECTROPHOTOGRAPHIC DEVELOPER |
摘要 |
This invention is directed to a method for manufacturing carrier core particles for electrophotographic developer containing iron, manganese, and calcium as a core composition. The method includes (A) a mixing step of mixing an iron-containing raw material, a manganese-containing raw material, and a calcium-containing raw material to prepare a mixture thereof, (C) a granulation step of granulating the mixture after the mixing step, and (D) a firing step of firing a powdery material, which is obtained by granulating the mixture in the granulation step, at a predetermined temperature to form a magnetic phase. The calcium-containing raw material is provided in a granular form, and primary particles of the calcium-containing raw material have a volume mean diameter of 1 µm or less. |
申请公布号 |
EP2891925(A1) |
申请公布日期 |
2015.07.08 |
申请号 |
EP20120883523 |
申请日期 |
2012.08.30 |
申请人 |
DOWA ELECTRONICS MATERIALS CO., LTD.;DOWA IP CREATION CO., LTD. |
发明人 |
KAWAUCHI, TAKESHI;IIDA, TOMOHIDE |
分类号 |
G03G9/107;G03G5/10;G03G9/113 |
主分类号 |
G03G9/107 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|