发明授权
- 专利标题: Piezoelectric ceramic composition, piezoelectric element, and resonator
- 专利标题(中): 压电陶瓷组合物,压电元件和谐振器
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申请号: US13052414申请日: 2011-03-21
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公开(公告)号: US08212457B2公开(公告)日: 2012-07-03
- 发明人: Goushi Tauchi , Tomohisa Azuma , Hideaki Sone
- 申请人: Goushi Tauchi , Tomohisa Azuma , Hideaki Sone
- 申请人地址: JP Chuo-ku, Tokyo
- 专利权人: TDK Corporation
- 当前专利权人: TDK Corporation
- 当前专利权人地址: JP Chuo-ku, Tokyo
- 代理机构: Drinker Biddle & Reath LLP
- 优先权: JP2010-066743 20100323
- 主分类号: H01L41/187
- IPC分类号: H01L41/187
摘要:
Provided is a piezoelectric ceramic composition which can increase Qmax of a resonator and inhibit the resonator from changing its oscillation frequency F0 under a low temperature environment. The piezoelectric ceramic composition has a structure represented by the following general formula (1): (PbαLnβMeγ)(Ti1−(x+y+z)ZrxMnyNbz)O3 (1) where Ln is a lanthanoid element, Me is an alkaline-earth metal element, α>0, β>0, γ≧0, 0.965≦α+β+γ≦1.000, 0.158≦x≦0.210, y≧0, z≧0, and 1−(x+y+z)>0.
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