Invention Grant
- Patent Title: Piezoelectric ceramic, piezoelectric element, and electronic appliance
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Application No.: US14989693Application Date: 2016-01-06
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Publication No.: US09698337B2Publication Date: 2017-07-04
- Inventor: Kanako Oshima , Masatoshi Watanabe , Tatsuya Suzuki , Mikio Shimada , Shinya Koyama , Yasushi Shimizu , Tatsuo Furuta , Hidenori Tanaka , Makoto Kubota , Jumpei Hayashi
- Applicant: CANON KABUSHIKI KAISHA
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon U.S.A., Inc., IP Division
- Priority: JP2015-003579 20150109
- Main IPC: H01L41/187
- IPC: H01L41/187 ; C04B35/462 ; H01L41/047 ; H02N2/00 ; H01L41/09 ; H01L41/08 ; H01L41/083 ; B06B1/06 ; H01L41/04 ; G02B27/00 ; H04N5/217 ; B41J2/14

Abstract:
A piezoelectric ceramic includes: a metal oxide represented by General Formula (1); and 0.04 parts by weight or more and 0.36 parts by weight or less of Mn and 0.042 parts by weight or more and 0.850 parts by weight or less of Bi on a metal basis relative to 100 parts by weight of the metal oxide, wherein the piezoelectric ceramic includes a plurality of first crystal grains having a perovskite structure, and a plurality of second crystal grains provided at a grain boundary between the first crystal grains and having a crystal structure different from that of the first crystal grain, and the second crystal grain mainly contains at least one metal oxide selected from Ba4Ti12O27 and Ba6Ti17O40. (Ba1-xCax)a(Ti1-yZry)O3 (1) (where 0.09≦x≦0.30, 0.025≦y≦0.085, 0.986≦a≦1.02)
Public/Granted literature
- US20160204335A1 PIEZOELECTRIC CERAMIC, PIEZOELECTRIC ELEMENT, AND ELECTRONIC APPLIANCE Public/Granted day:2016-07-14
Information query
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