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    Piezoelectric ceramic composition
    4.
    发明申请
    Piezoelectric ceramic composition 审中-公开
    压电陶瓷组合物

    公开(公告)号：US20060043329A1

    公开(公告)日：2006-03-02

    申请号：US11210468

    申请日：2005-08-24

    申请人： Masakazu Hirose ,  Tomohisa Azuma ,  Masahito Furukawa ,  Takeo Tsukada ,  Norimasa Sakamoto

    发明人： Masakazu Hirose ,  Tomohisa Azuma ,  Masahito Furukawa ,  Takeo Tsukada ,  Norimasa Sakamoto

    IPC分类号： C04B35/49

    CPC分类号： C04B35/493 ,  C04B35/62665 ,  C04B2235/3206 ,  C04B2235/3217 ,  C04B2235/3241 ,  C04B2235/3251 ,  C04B2235/3418 ,  H01L41/187

    摘要： A piezoelectric ceramic composition which has a large electromechanical coupling factor and is excellent in heat resisting properties is provided. As additives, Cr, Al and Si are contained together in the piezoelectric ceramic composition including a perovskite compound which contains Pb, Zr and Ti as main components. Preferably, Cr, Al and Si are respectively contained in a content of 0.05 to 0.50 wt % in terms of Cr2O3, in a content of 0.005 to 1.500 wt % in terms of Al2O3, and in a content of 0.005 to 0.100 wt % in terms of SiO2. By simultaneously including these three elements and setting the contents thereof to fall within the above mentioned ranges, the electromechanical coupling factor kt can be 30% or more, and ΔFr, which is the rate of change in resonant frequency Fr between before and after application of an external thermal shock, can be 0.5% or less in absolute value.

    摘要翻译： 提供了具有大的机电耦合系数并且耐热性优异的压电陶瓷组合物。 作为添加剂，包含Pb，Zr和Ti作为主要成分的钙钛矿型化合物的压电陶瓷组合物中含有Cr，Al，Si。 优选地，Cr，Al和Si分别以Cr 2 Al 3 O 3含量为0.05〜0.50重量％，含量为0.005〜1.500重量％ 以Al 2 O 3 3计，含量为0.005〜0.100重量％，以SiO 2 2计。 通过同时包含这三个要素并将其内容设定在上述范围内，机电耦合系数kt可以为30％以上，作为施加前后的谐振频率Fr的变化率的DeltaFr 外部热冲击的绝对值可以为0.5％以下。

    PIEZOELECTRIC CERAMIC, PIEZOELECTRIC ELEMENT COMPRISING IT, AND PIEZOELECTRIC DEVICE COMPRISING PIEZOELECTRIC ELEMENT
    6.
    发明申请
    PIEZOELECTRIC CERAMIC, PIEZOELECTRIC ELEMENT COMPRISING IT, AND PIEZOELECTRIC DEVICE COMPRISING PIEZOELECTRIC ELEMENT 有权
    压电陶瓷，包含它的压电元件和包含压电元件的压电器件

    公开(公告)号：US20120080636A1

    公开(公告)日：2012-04-05

    申请号：US13239135

    申请日：2011-09-21

    申请人： Goushi Tauchi ,  Daisuke Tanaka ,  Masahito Furukawa

    发明人： Goushi Tauchi ,  Daisuke Tanaka ,  Masahito Furukawa

    IPC分类号： H01L41/187

    CPC分类号： H01L41/1876

    摘要： According to a preferred embodiment, the piezoelectric ceramic includes a complex oxide having the composition represented by formula (1) or (2), and Mn at 0.2-1.2 mass % or 0.2-3 mass %, respectively, in terms of MnCO3. (Pb1-aA1a)TixZr1-x-y-z-b(Zn1/3A22/3)y(Yb1/2A21/2)zSnbO3  (1) (Pb1-aA1a)TixZr1-x-y-b(Zn1/3A22/3)ySnbO3  (2) [In formula (1), A1 represents at least one element selected from the group consisting of Ca, Sr and Ba, and A2 is at least one element selected from the group consisting of Nb, Ta and Sb, and includes at least Nb. In formula (2), A1 represents at least one element selected from among Ca, Sr and Ba, A2 represents at least one element selected from among Nb and W, and A2 includes at least Nb.]

    摘要翻译： 根据优选的实施方案，压电陶瓷包括具有由式（1）或（2）表示的组成的复合氧化物，Mn分别为0.2〜1.2质量％或0.2〜3质量％的Mn。 （Pb1-aA1a）TixZr1-xyzb（Zn1 / 3A22 / 3）y（Yb1 / 2A21 / 2）zSnbO3（1）（Pb1-aA1a）TixZr1-xyb（Zn1 / 3A22 / 3）ySnbO3（2） 1）中，A1表示选自Ca，Sr和Ba中的至少一种元素，A2是选自Nb，Ta和Sb中的至少一种元素，并且至少包括Nb。 在式（2）中，A1表示选自Ca，Sr和Ba中的至少一种元素，A2表示选自Nb和W中的至少一种元素，A2包括至少Nb。