中文摘要：

采用传统的固相反应法和普通烧结工艺，制备了A位和B位复合的（Na0．5＋xK0．44Li0.06-x）Nb0．95Sb0.05O3（x=0，0．006，0．012）系无铅压电陶瓷样品，并对样品的压电、机电性能进行了研究。结果表明：该陶瓷系列具有很高的压电应变常数（x=0．006时d33=243pC／N）、低的介质损耗（tanδ〈2×10^-2）、较高的机电耦合系数（x=0．012时，k33=0．632）、高的铁电顺电相变温度（七约400℃）。这些性能显示了它是一种替代铅基PZT的具有很好应用前景的无铅压电陶瓷。

英文摘要：

A-site and B-site complex （Na0.5＋xK0.44Li0.06-x）Nb0.95Sb0.05O3 （x = 0, 0.006, 0,012） lead-free ceramics were prepared by conventional oxide solid-solution technique, The piezoelectric, electromechanical, properties of the ceramics were evaluated. The results show that this lead-free ceramics system has a relatively high piezoelectric constant（x = 0.006, d33 = 243 pC/N）, high electromechanical coupling factor k33 （x = 0.012, k33 = 0.632） and relatively low dielectric loss（tanδ〈2×10^-2） and a high Curie temperature of 400℃. These features indicate that ceramics （Na0.5＋xK0.44Li0.06-x）Nb0.95Sb0.05O3 is a promising candidate for replacing Pb-based PZT in piezoelectric application fields.