In this study, in order to develop excellent lead free piezoelectric ceramics for piezoelectric actuators application, Li0.04(Na0.50K0.50)0.96[(Nb0.86Ta0.10Sb0.04)0.994Co0.015]O3+0.0025SrO + 0.15 wt%K2CO3 + x wt%Nb2O5 (x = 0 - 0.5 wt%) (abbreviated as LNKNTSCS-xN) ceramics were fabricated by a conventional sintering technique. the phase structure, microstructure and electrical properties were investigated with a emphasis on the influence of the Nb2O5 content. High electrical properties of d33= 234 pC/N, kp= 0.392, εr= 1,395, ρ= 4.70 g/cm3 were obtained from the specimen with x= 0.4 wt%, which suggests that the composition ceramics is a promising lead-free piezoelectric material.
