随着我国科技水平的飞速发展，激光惯性导航系统的精度要求越来越高。采用工业级原材料，通过固相合成法制备了铌锑-铌镍-锆钛酸铅(PSN-PNN-PZT)四元系大应变压电陶瓷材料，讨论了不同含量Sr对PSN-PNN-PZT压电陶瓷材料介电性能、压电性能的影响。结果表明：当Sr含量为1%(摩尔分数)、n(Zr)/n(Ti)=43/57(摩尔比)时，PSN-PNN-PZT组成位于准同型相界附近，压电陶瓷性能较优，获得了一种相对介电常数εT33/ε0、机电耦合系数kp、压电常数d33、介电损耗tan δ、居里温度Tc分别为4 090、0.664、686 pC/N、0.016 5及213 ℃的大应变压电陶瓷材料；基于该材料配方制备的24 mm×5 mm×0.4 mm压电陶瓷圆环，在100 V的驱动电压下产生的应变量能达到2.500 5 μm，较现有的PZT-14(P14)材料提升32.4%，能应用于高精度激光陀螺稳频器中，提高压电陶瓷微位移驱动器的可靠性。

With the rapid development of scientific and technological level, the accuracy requirements for laser inertial navigation systems are becoming increasingly high. The quaternary PSN-PNN-PZT piezoelectric ceramics with large strain were prepared by the conventional solid-state synthesis method using industrial grade raw materials. The influence of different content Sr on the dielectric and piezoelectric properties of PSN-PNN-PZT piezoelectric ceramics was discussed. It is found that when the Sr content is 1% (mole fraction) and the molar ratio of n(Zr)/n(Ti) is 43/57, the PSN-PNN-PZT composition locates at morphotropic phase boundary and the piezoelectric ceramics show excellent properties. The large strain piezoelectric ceramics can be achieved, which are as follows: relative dielectric constant εT33/ε0=4 090, electromechanical coupling coefficient kp=0.664, piezoelectric constant d33=686 pC/N, dielectric loss tan δ=0.016 5, Curie temperature Tc=213 ℃. The strain of 24 mm×5 mm×0.4 mm piezoelectric ceramic thin rings based on this material formula reaches 2.500 5 μm at 100 V driving voltage, which is 32.4% higher than that of the existing PZT-14 (P14) material. This material can be applied in high-precision laser gyro frequency stabilizers to improve the reliability of piezoelectric micro-displacement actuator。