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    PIEZOELECTRIC CERAMIC AND METHOD OF MANUFACTURING THE SAME
    3.
    发明申请
    PIEZOELECTRIC CERAMIC AND METHOD OF MANUFACTURING THE SAME 审中-公开
    压电陶瓷及其制造方法

    公开(公告)号：US20130164533A1

    公开(公告)日：2013-06-27

    申请号：US13771895

    申请日：2013-02-20

    Applicant: National Institute for Materials Science ,  MURATA MANUFACTURING CO., LTD.

    Inventor： Tohru Suzuki ,  Tetsuo Uchikoshi ,  Yoshio Sakka ,  Yasunari Miwa ,  Shinichiro Kawada ,  Masahiko Kimura

    IPC: H01L41/187 ,  H01L41/333

    CPC classification number: C04B35/475 ,  B28B1/30 ,  B28B5/027 ,  C04B35/465 ,  C04B35/495 ,  C04B2235/3208 ,  C04B2235/3232 ,  C04B2235/3251 ,  C04B2235/3262 ,  C04B2235/3298 ,  C04B2235/6027 ,  C04B2235/785 ,  C04B2235/786 ,  C04B2235/787 ,  H01L41/1878 ,  H01L41/333 ,  H01L41/43 ,  Y10T428/2982

    Abstract: A piezoelectric ceramic having excellent electrical characteristics, and in which all of three crystallographic axes are oriented is obtained by slip cast or sheet forming a ceramic slurry containing plate-shaped ceramic particles in magnetic field. The degree of orientation of a first axis (for example, a c axis) calculated with the Lotgering method based on an X-ray diffraction (XRD) pattern in a prescribed cross-section of this piezoelectric ceramic is not less than 0.30. With a cross-section where the degree of orientation of the first axis indicates a maximum value being defined as a reference plane, the degree of orientation of a second axis (for example, an a axis) calculated with the Lotgering method based on an X-ray diffraction pattern in a cross-section orthogonal to this reference plane is not less than 0.20. The degree of orientation of the second axis is represented by a value in such a cross-section that the degree of orientation of the second axis attains to a maximum value, among cross-sections orthogonal to the reference plane.

    Abstract translation: 通过在磁场中形成含有板状陶瓷颗粒的陶​​瓷浆料的滑移或片材获得具有优异电特性，并且其中所有三个结晶轴取向的压电陶瓷。 以该压电陶瓷的规定截面为基准的X射线衍射（XRD）图案，利用浮法法计算的第一轴（例如c轴）的取向度为0.30以上。 以第一轴的取向度表示被定义为基准面的最大值的横截面，使用基于X的Lotkering方法计算出的第二轴（例如a轴）的取向度 与该参考平面正交的横截面中的射线衍射图案不小于0.20。 在与参考平面正交的横截面中，第二轴的取向度由在第二轴的取向度达到最大值的横截面中的值表示。

    Piezoelectric ceramic electronic component
    6.
    发明授权
    Piezoelectric ceramic electronic component 有权

    公开(公告)号：US12245511B2

    公开(公告)日：2025-03-04

    申请号：US17508567

    申请日：2021-10-22

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： Yasunari Miwa ,  Hiroyuki Sumioka ,  Hiroyuki Hayashi ,  Hirozumi Ogawa

    IPC: H10N30/853 ,  H10N30/00 ,  H10N30/097 ,  H10N30/50

    Abstract: A piezoelectric ceramic electronic component that includes a piezoelectric ceramic body including at least one piezoelectric ceramic layer; and a plurality of electrodes on a surface or inside of the piezoelectric ceramic body and arranged so that the at least one piezoelectric ceramic layer is sandwiched between adjacent electrodes of the plurality of electrodes. The at least one piezoelectric ceramic layer is a ceramic sintered body containing a potassium sodium niobate-based compound and Mn. When the at least one piezoelectric ceramic layer sandwiched between the adjacent electrodes is divided into three equal parts in a thickness direction to sequentially define a first region, a second region, and a third region between the adjacent electrodes, a second Mn concentration in the second region is higher than a first Mn concentration in the first region and a third Mn concentration in the third region.

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