发明授权
- 专利标题： Lead-free piezoelectric ceramic composition, piezoelectric element comprising same, knock sensor, and process for production of lead-free piezoelectric ceramic composition
- 专利标题（中）： 无铅压电陶瓷组合物，包含其的压电元件，爆震传感器和无铅压电陶瓷组合物的制造方法
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申请号： US13392030申请日： 2011-01-14
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公开(公告)号： US09006959B2公开(公告)日： 2015-04-14
- 发明人: Masato Yamazaki , Takayuki Matsuoka , Katsuya Yamagiwa , Kazushige Ohbayashi
- 申请人： Masato Yamazaki , Takayuki Matsuoka , 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： JP2010-017720 20100129
- 国际申请： PCT/JP2011/000176 WO 20110114
- 国际公布： WO2011/093021 WO 20110804
- 主分类号： H01L41/187
- IPC分类号： H01L41/187 ; H01L41/43 ; C04B35/462 ; C04B35/495 ; G01L23/22
摘要：
A lead-free piezoelectric ceramic composition includes a first crystal phase of alkali niobate/tantalate type perovskite oxide having piezoelectric properties and a second crystal phase of A-Ti—B—O composite oxide (where the element A is an alkali metal; the element B is at least one of Nb and Ta; and the contents of the element A, the element B and Ti are not zero). Examples of the second crystal phase are those represented by A1−xTi1−xB1+xO5, and x preferably satisfies 0≦x≦0.15.
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