Invention Grant
- Patent Title: Piezoelectric ceramic, method of manufacturing same, and piezoelectric ceramic speaker using same
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Application No.: US14522280Application Date: 2014-10-23
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Publication No.: US09786833B2Publication Date: 2017-10-10
- Inventor: Gouki Watanabe , Takayuki Goto , Keiichi Hatano , Sumiaki Kishimoto , Yutaka Doshida
- Applicant: TAIYO YUDEN CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: TAIYO YUDEN CO., LTD.
- Current Assignee: TAIYO YUDEN CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Law Office of Katsuhiro Arai
- Priority: JP2013-232588 20131108; JP2014-119824 20140610
- Main IPC: H01L41/187
- IPC: H01L41/187 ; H01L41/43 ; C04B35/493 ; C04B35/64 ; H04R17/00 ; H04R31/00 ; C04B35/626
Abstract:
A piezoelectric ceramic has a primary phase constituted by ceramic grains of perovskite crystal structure containing Pb, Nb, Zn, Ti, and Zr, and a secondary phase constituted by ZnO grains present sporadically in the primary phase. The piezoelectric ceramic of high kr and high specific dielectric constant can be sintered at low temperature and exhibit minimal characteristics variations.
Public/Granted literature
- US20150132529A1 PIEZOELECTRIC CERAMIC, METHOD OF MANUFACTURING SAME, AND PIEZOELECTRIC CERAMIC SPEAKER USING SAME Public/Granted day:2015-05-14
Information query
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