Piezoelectric ceramics composition and high-output power transformer produced with the same composition

本发明公开了一种介电常数、机械品质因数Qm和机电耦合因数Kp优异的压电陶瓷组合物和由其制得的高输出功率的压电变压器。该压电陶瓷组合物包含：Pb[(Sb#-[1/2]Nb#-[1/2])#-[x](Zr#-[0.495]Ti#-[0.505])#-[1-x]]O#-[3]+yPbO+zMnO，其中x是0.02-0.05摩尔％，y是0.4-0.55重量％，且z是0.2-0.6重量％，其中介电常数是1320或更多，机电耦合因数是0.520或更多，且机械品质因数是1440或更多。所述高输出功率的压电变压器包括：由上述组合物组成的压电块；由一内电极和一外电极组成的第一电极，所述内电极是在压电块的顶面的中心形成而所述外电极是通过一隔离区分开而在内电极的周围形成；和在压电块底面的形成的第二电极。 A piezoelectric ceramic composition with superior dielectric constant, mechanical quality factor Qm and electromechanical coupling factor Kp, and a high power output piezoelectric transformer made from the composition are disclosed. The piezoelectric ceramic composition is composed of Pb [(Sb1/2Nb1/2)x (Zr0.495Ti0.505)1-x] O3+yPbO+zMnO, where x is 0.01-0.05, y is 0.3-0.6 wt %, and z is 0.7 wt % or less.