发明授权
- 专利标题： Piezoelectric ceramics and their manufacturing methods, and piezoelectric device
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申请号： US17037494申请日： 2020-09-29
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公开(公告)号： US11937510B2公开(公告)日： 2024-03-19
- 发明人: Tomohiro Harada , Yuuhei Ueyama
- 申请人： TAIYO YUDEN CO., LTD.
- 申请人地址： JP Tokyo
- 专利权人： TAIYO YUDEN CO., LTD.
- 当前专利权人： TAIYO YUDEN CO., LTD.
- 当前专利权人地址： JP Tokyo
- 代理机构： CHEN YOSHIMURA LLP
- 优先权： JP 19190183 2019.10.17
- 主分类号： H01L41/187
- IPC分类号： H01L41/187 ; H01L41/047 ; H01L41/312 ; H01L41/43 ; H10N30/072 ; H10N30/097 ; H10N30/853 ; H10N30/87
摘要：
A piezoelectric ceramic containing no lead as a constituent element is provided. Coefficient of variation C.V. of grain size of grains contained in the piezoelectric ceramic is 35% or less, and an image quality (IQ) image obtained by analyzing a cross section of the piezoelectric ceramic by an electron backscatter diffraction (EBSD) method shows that at least one of the grains has a grain size of 3 μm to 5 μm and an area ratio of a domain in said at least one of the grains is 85% or more.
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