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    Piezoelectric composition and piezoelectric device
    4.
    发明授权
    Piezoelectric composition and piezoelectric device 有权
    压电组合和压电器件

    公开(公告)号：US09537083B2

    公开(公告)日：2017-01-03

    申请号：US14201515

    申请日：2014-03-07

    Applicant: TDK CORPORATION

    Inventor： Taku Masai ,  Masamitsu Haemori ,  Masahito Furukawa ,  Junichi Yamazaki ,  Kouhei Ohhashi

    IPC: H01L41/187 ,  C04B35/475 ,  H01L41/08 ,  H01L41/316

    CPC classification number: H01L41/1878 ,  C04B35/475 ,  H01L41/0805 ,  H01L41/316

    Abstract: Provided is a piezoelectric composition containing a major component that is a perovskite-type oxide which is represented by the general formula ABO3, which contains no Pb, and which has A-sites containing Bi, Na, and K and B-sites containing Ti. The Ti is partly substituted with a transition metal element Me that is at least one selected from the group consisting of Mn, Cr, Fe, and Co. The content of Bi and the transition metal element Me in the perovskite-type oxide, which is the major component, is 6 mole percent to 43 mole percent in terms of Biu1MeO3.

    Abstract translation: 本发明提供一种压电组合物，其含有主要成分为钙钛矿型氧化物，其由不含Pb的通式ABO3表示，具有含有Bi，Na，K的A位点和含有Ti的B位点。 Ti部分被选自Mn，Cr，Fe和Co中的至少一种的过渡金属元素Me所取代。钙钛矿型氧化物中Bi和过渡金属元素Me的含量为 主要组分按Biu1MeO3计为6摩尔％至43摩尔％。

    Piezoelectric device
    6.
    发明授权
    Piezoelectric device 有权
    压电元件

    公开(公告)号：US09324931B2

    公开(公告)日：2016-04-26

    申请号：US13893865

    申请日：2013-05-14

    Applicant: TDK CORPORATION

    Inventor： Masahito Furukawa ,  Tomohisa Azuma ,  Taku Masai

    IPC: H01L41/187 ,  C04B35/00 ,  H01L41/047 ,  H01L41/08 ,  H01L41/313

    CPC classification number: H01L41/0477 ,  H01L41/0815 ,  H01L41/1873 ,  H01L41/313

    Abstract: A piezoelectric device includes a first electrode film, a piezoelectric film disposed on the first electrode film, and a second electrode film disposed on the piezoelectric film. At least one of the first and second electrode films is composed of an alloy, and a main component of the alloy is a metal selected from the group consisting of Ti, Al, Mg, and Zn. The piezoelectric film has a main composition represented by (K1-x-y-w-vNaxLiyBawSrv)m(Nb1-z-uTazZru)O3 (1), where x, y, z, w, v, u, and m in formula (1) satisfy 0.4

    Abstract translation: 压电装置包括第一电极膜，设置在第一电极膜上的压电膜和设置在压电膜上的第二电极膜。 第一电极膜和第二电极膜中的至少一个由合金构成，合金的主要成分为选自Ti，Al，Mg，Zn的金属。 压电膜具有由（K1-xyw-vNaxLiyBawSrv）m（Nb1-z-uTazZru）O3（1）表示的主要组成，其中式（1）中的x，y，z，w，v，u和m满足 0.4

    Dielectric composition and electronic component
    7.
    发明授权
    Dielectric composition and electronic component 有权

    公开(公告)号：US10710932B2

    公开(公告)日：2020-07-14

    申请号：US16357860

    申请日：2019-03-19

    Applicant: TDK CORPORATION

    Inventor： Daisuke Ohtsu ,  Taku Masai ,  Liu Hailong ,  Liang Liping

    IPC: C04B35/468 ,  C04B35/47 ,  C04B35/453 ,  H01G4/12 ,  C04B35/475

    Abstract: The object of the present invention is to provide the dielectric composition having good specific permittivity, high DC breakdown voltage and AC breakdown voltage, small dielectric loss and heat generating property, and good temperature property even though lead is not substantially used. A dielectric composition of the first aspect includes a, Ca, Bi, Ti, and Sr, wherein the dielectric composition includes two phases having different Sr characteristic X ray intensities when a characteristic X ray intensity derived from Sr is measured by EPMA, and when Sr1 represents the characteristic X ray intensity derived from Sr of a first phase measured by EPMA and Sr2 represents the characteristic X ray intensity derived from Sr of a second phase measured by EPMA, a ratio (Sr2/Sr1) of Sr2 with respect to Sr1 satisfies 2 or larger. A dielectric composition of the second aspect includes Ba, Ca, Bi, Ti, and Sr, wherein the dielectric composition includes three phases having different Sr characteristic X ray intensities when a characteristic X ray intensity derived from Sr is measured by EPMA, and when Sr1 represents the characteristic X ray intensity derived from Sr of a first phase measured by EPMA, Sr2 represents the characteristic X ray intensity derived from Sr of a second phase measured by EPMA, and Sr3 represents the characteristic X ray intensity derived from Sr of a third phase measured by EPMA, an intensity ratio (Sr1/Sr3) of Sr1 with respect to Sr3 is 0.6 or less and an intensity ratio (Sr2/Sr3) of Sr2 with respect to Sr3 is 1.4 or more.

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