Piezoelectric ceramic material
    11.
    发明授权
    Piezoelectric ceramic material 有权
    压电陶瓷材料

    公开(公告)号:US06685850B2

    公开(公告)日:2004-02-03

    申请号:US09915347

    申请日:2001-07-27

    IPC分类号: C04B3501

    CPC分类号: H01L41/187 C04B35/475

    摘要: The invention provides a piezoelectric ceramic material comprising a Bi3TiNbO9 crystal and/or an MBi2Nb2O9 crystal which are each a bismuth layer compound, where M represents at least one element selected from Sr, Ba and Ca. The ceramic material contains Bi, Ti, M and Nb as main component elements. The molar ratio as oxides of the main component elements is given by (Bi3−xMx)z (Nb1+yTi1−y)O9 provided that 0

    摘要翻译: 本发明提供一种包含Bi3TiNbO9晶体和/或MBi2Nb2O9晶体的压电陶瓷材料,它们各自是铋层化合物,其中M表示选自Sr,Ba和Ca中的至少一种元素。 陶瓷材料含有Bi,Ti,M和Nb作为主要成分。 如果0

    Piezoelectric ceramic composition
    17.
    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

    IPC分类号: C04B35/49

    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。