Compositions for high power piezoelectric ceramics
    44.
    发明授权
    Compositions for high power piezoelectric ceramics 有权
    大功率压电陶瓷的组成

    公开(公告)号:US08216488B2

    公开(公告)日:2012-07-10

    申请号:US13101188

    申请日:2011-05-05

    Applicant: De Liufu

    Inventor: De Liufu

    Abstract: A class of ceramic compositions according to the formula Pb(1-z)Mz(Mn1/3Sb2/3)x(ZryTi1-y)1-xO3 where M is selected to be either Sr or Ba, x is selected to be between 0.01 and 0.1, y is selected to be between 0.35 and 0.55, and z is selected to be between 0.01 and 0.10. In some embodiments of the above composition, one or more dopants is added to the compositions. The dopant(s) may be selected from the group comprising: PbO, CeO2, SnO2, Sm2O3, TeO2, MoO3, Nb2O5, SiO2, CuO, CdO, HfO2, Pr2O3, and mixtures thereof. The dopants can be added to the ceramic composition in individual amounts ranging from 0.01 wt % to up to 5.0 wt %. The preferred ceramic compositions exhibit one or more of the following electromechanical properties: a relative dielectric constant (∈) of between 1200 and 2000, a mechanical quality factor (Qm) of between 1500 and 2800; a piezoelectric strain constant (d33) of between 250-450 pC/N, a dielectric loss factor (tan δ) of between 0.002-0.008 and a thickness electromechanical coupling coefficient (kt) of between 0.45 and 0.7.

    Abstract translation: 一类根据式Pb(1-z)Mz(Mn1 / 3Sb2 / 3)x(ZryTi1-y)1-xO3的陶瓷组合物,其中M选择为Sr或Ba,x选择为0.01 和0.1,y选择在0.35和0.55之间,z选择在0.01和0.10之间。 在上述组合物的一些实施方案中,将一种或多种掺杂剂加入到组合物中。 掺杂剂可以选自PbO,CeO 2,SnO 2,Sm 2 O 3,TeO 2,MoO 3,Nb 2 O 5,SiO 2,CuO,CdO,HfO 2,Pr 2 O 3及其混合物。 掺杂剂可以以0.01重量%至高达5.0重量%的单独量加入陶瓷组合物中。 优选的陶瓷组合物表现出以下机电性质中的一种或多种:介于1200和2000之间的相对介电常数(ε),1500至2800之间的机械品质因数(Qm); 压电应变常数(d33)在250-450pC / N之间,介电损耗因子(tanδ)在0.002-0.008之间和厚度机电耦合系数(kt)在0.45和0.7之间。

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