- 专利标题： Lead-free piezoelectric ceramic composition, method for producing same, piezoelectric element using lead-free piezoelectric ceramic composition, ultrasonic processing machine, ultrasonic drive device, and sensing device
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申请号： US14232146申请日： 2012-07-04
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公开(公告)号： US09828296B2公开(公告)日： 2017-11-28
- 发明人: Masato Yamazaki , Takayuki Matsuoka , Kazuaki Kitamura , Hideto Yamada , Toshiaki Kurahashi , Katsuya Yamagiwa , Kazushige Ohbayashi
- 申请人： Masato Yamazaki , Takayuki Matsuoka , Kazuaki Kitamura , Hideto Yamada , Toshiaki Kurahashi , Katsuya Yamagiwa , Kazushige Ohbayashi
- 申请人地址： JP Aichi
- 专利权人： NGK SPARK PLUG CO., LTD.
- 当前专利权人： NGK SPARK PLUG CO., LTD.
- 当前专利权人地址： JP Aichi
- 代理机构： Sughrue Mion, PLLC
- 优先权： JP2011-154430 20110713
- 国际申请： PCT/JP2012/004329 WO 20120704
- 国际公布： WO2013/008418 WO 20130117
- 主分类号： H01L41/187
- IPC分类号： H01L41/187 ; C04B35/64 ; C04B35/495 ; C04B35/626 ; G01L23/22 ; B06B1/06 ; H01L41/43
摘要：
A lead-free piezoelectric ceramic composition mainly includes a first crystal phase (KNN phase) and a second crystal phase (NTK phase). In the first crystal phase (KNN phase), a plurality of crystal grains formed of an alkali niobate/tantalate perovskite oxide having piezoelectric characteristics is bound to each other in a deposited state. The second crystal phase (NTK phase) is formed of a compound containing titanium (Ti) and fills spaces between the crystal grains in the first crystal phase.
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