中文摘要：

研究了（1-y）（Na0.5Bi0.5）TiO3-yBa（ZrxTi1-x）O3无铅压电陶瓷，获得压电应变常数d33高达185pC／N的0．94（Na0.5Bi0.5）TiO3-0．06Ba（Zr0.055Ti0.945）O3压电陶瓷。添加0．04％摩尔过量Na2CO3的0．94（Na0.5Bi0.5）TiO3-0．06Ba（Zr0.055Ti0.945）O3高性能压电陶瓷d33高达195pC／N。研究发现添加Na2CO3添加量至0．04％摩尔，Na起到软性添加物的作用，添加量超过0．04％，Na起到硬性添加物的作用．理论解释了过量Na的这一特性．为了降低介电损耗，对0．94（Na0.5Bi0.5）TiO3-0．06Ba（Zr0.055Ti0.945）O3陶瓷进行了（Ce，Mn）掺杂改性研究。

英文摘要：

Lead-free piezoelectric ceramics （ 1 - y） （ Na0.5 Bi0.5 ） TiO3-yBa（ZrxTi1-x ）O3 were systematically investigated. Two compositions with high piezoelectric performances were obtained= one was 0. 94 （Na0.5 Bi0.5 ）TiO3-0. 06Ba（Zr0.055 Ti0.945 ）O3 having a piezoelectric strain constant d33 as high as 185 pC/N;the other was the 0.94（Na0.5Bi0.5）TiO3-0.06Ba（Zr0.055Ti0.945）O3 doped with extra 0.04% Na2CO3, having a d33 as high as 195 pC/N. It was found that the extra Na in the range up to 0.04% played the soft additive role, but in the range over 0. 04%, it played the hard additive role. Why the extra Na had such characteristic was theoretically explained. In order to reduce the dielectric loss, the effect of （Ce, Mn） dopants on the properties of 0.94（Na0.5 Bi0.5 ）TiO3-0.06Ba（Zr0.055 Ti0.945 ） O3 doped with extra 0.04 % Na2CO3 was studied.