Invention Grant
- Patent Title: Ferrite composition, ferrite plate, member for antenna element, and antenna element
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Application No.: US14555159Application Date: 2014-11-26
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Publication No.: US09793608B2Publication Date: 2017-10-17
- Inventor: Tomokazu Ishikura , Shin Takane , Norizumi Asano , Kosuke Kunitsuka
- Applicant: TDK CORPORATION
- Applicant Address: JP Tokyo
- Assignee: TDK CORPORATION
- Current Assignee: TDK CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP2013-263283 20131220
- Main IPC: H01Q7/06
- IPC: H01Q7/06 ; H01Q7/08 ; C02F1/46 ; H01Q1/22 ; H01F1/34 ; G06K19/077 ; C04B35/26 ; C04B35/638

Abstract:
An object is to provide a ferrite composition suitable for an antenna element with a long communication distance in a high-frequency band (for example, 13.56 MHz), a ferrite plate formed of the ferrite composition, a magnetic member for an antenna element formed of the ferrite plate, and an antenna element provided with a member for an antenna element. A ferrite composition, wherein: main components contain, with Fe2O3 conversion, 45.0-49.5 mol % of iron oxide, with CuO conversion, 4.0-16.0 mol % of copper oxide, with ZnO conversion, 19.0-25.0 mol % of zinc oxide, a remaining portion is constituted by nickel oxide, an inevitable impurity is removed with respect to the main components, and as accessory components, with TiO2 conversion, 0.5-2 weight % of titanium oxide, with CoO conversion, 0.35-2 weight % of cobalt oxide are contained.
Public/Granted literature
- US20150180128A1 FERRITE COMPOSITION, FERRITE PLATE, MEMBER FOR ANTENNA ELEMENT, AND ANTENNA ELEMENT Public/Granted day:2015-06-25
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