发明申请
- 专利标题： Piezoelectric ceramic composition and piezoelectric device
- 专利标题（中）： 压电陶瓷组合物和压电装置
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申请号： US10559740申请日： 2004-09-09
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公开(公告)号： US20060273697A1公开(公告)日： 2006-12-07
- 发明人: Masakazu Hirose , Tomohisa Azuma , Yasuo Niwa , Masaru Abe
- 申请人： Masakazu Hirose , Tomohisa Azuma , Yasuo Niwa , Masaru Abe
- 申请人地址： JP Tokyo
- 专利权人： TDK CORPORATION
- 当前专利权人： TDK CORPORATION
- 当前专利权人地址： JP Tokyo
- 优先权： JP2003-334195 20030925
- 国际申请： PCT/JP04/13106 WO 20040909
- 主分类号： H01L41/187
- IPC分类号： H01L41/187
摘要：
A piezoelectric ceramic composition excellent in heat resisting properties is provided. In the piezoelectric ceramic composition including a perovskite compound containing Pb, Zr and Ti as main components, the piezoelectric ceramic composition is made to include Cr as an additive from 0.025 to 0.250 wt % in terms of Cr2O3. In the piezoelectric ceramic composition of the present invention, Δk15 (here, Δk15 is the rate of change in electromechanical coupling factor k15, caused by external thermal shock), of the piezoelectric ceramic composition can be controlled to 3.0% or less in absolute value.
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