Invention Grant
- Patent Title: Method for improving coercive force of epsilon-type iron oxide, and epsilon-type iron oxide
- Patent Title (中): 改进ε型氧化铁矫顽力的方法和ε型氧化铁
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Application No.: US13499172Application Date: 2010-09-30
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Publication No.: US09458026B2Publication Date: 2016-10-04
- Inventor: Shin-ichi Ohkoshi , Shunsuke Sakurai , Asuka Namai , Sayaka Umeda , Hiroshi Hachiya , Kazuyuki Matsumoto , Takashi Gotoh
- Applicant: Shin-ichi Ohkoshi , Shunsuke Sakurai , Asuka Namai , Sayaka Umeda , Hiroshi Hachiya , Kazuyuki Matsumoto , Takashi Gotoh
- Applicant Address: JP Tokyo JP Tokyo
- Assignee: THE UNIVERSITY OF TOKYO,DOWA ELECTRONICS MATERIALS CO., LTD.
- Current Assignee: THE UNIVERSITY OF TOKYO,DOWA ELECTRONICS MATERIALS CO., LTD.
- Current Assignee Address: JP Tokyo JP Tokyo
- Agency: Oliff PLC
- Priority: JP2009-228752 20090930
- International Application: PCT/JP2010/067094 WO 20100930
- International Announcement: WO2011/040534 WO 20110407
- Main IPC: C01G49/08
- IPC: C01G49/08 ; C04B35/26 ; C04B35/64 ; C01G49/06 ; C04B35/628 ; H01F1/10 ; C01G49/00
Abstract:
To provide a method for improving a coercive force of epsilon-type iron oxide particles, and an epsilon-type iron oxide. Specifically, to provide a method for improving the coercive force of an epsilon-type iron oxide comprising: substituting Fe-site of the epsilon-type iron oxide with other element, while not substituting Fe of D-site in the epsilon-type iron oxide with other element, and the epsilon type iron oxide.
Public/Granted literature
- US20120263642A1 METHOD FOR IMPROVING COERCIVE FORCE OF EPSILON-TYPE IRON OXIDE, AND EPSILON-TYPE IRON OXIDE Public/Granted day:2012-10-18
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