发明申请
- 专利标题： Piezoelectric Ceramics and Piezoelectric Element
- 专利标题（中）： 压电陶瓷和压电元件
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申请号： US10581277申请日： 2004-12-03
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公开(公告)号： US20070257228A1公开(公告)日： 2007-11-08
- 发明人: Takeo Tsukada , Tomohisa Azuma , Masakazu Hirose , Hitoshi Oka
- 申请人： Takeo Tsukada , Tomohisa Azuma , Masakazu Hirose , Hitoshi Oka
- 专利权人： TDK Corporation
- 当前专利权人： TDK Corporation
- 优先权： JP2003-405814 20031204; JP2003-427462 20031224; JP2003-427399 20031224
- 国际申请： PCT/JP04/18034 WO 20041203
- 主分类号： H01L41/083
- IPC分类号： H01L41/083
摘要：
A piezoelectric ceramics having ceramic particles, wherein said ceramic particles comprises bismuth layer compound containing at least Sr, Ln (note that Ln is a lanthanoid element), Bi, Ti and O and including MIIBi4Ti4O15 type crystal (MII is an element composed of Sr and Ln) as a main component, and an oxide of Mn as a subcomponent; and an average particle diameter by the code length measuring method is 0.8 to 4.7 μm: by which it is possible to provide piezoelectric ceramics having a large Qmax in a third harmonic mode of thickness vertical vibration in a relatively high frequency band (for example, 16 to 65 MHz), a resonator an other piezoelectric element comprising the piezoelectric ceramics as a piezoelectric substance thereof.
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