Abstract: Lead-free piezoelectric ceramics 0.94(Na_0.96-xK_xLi_0.04)_0.5Bi_0.5TiO₃-0.06Ba(Zr_0.055Ti_0.945)O₃ were fabricated with the variation of K content and their dielectric and piezoelectric characteristics were also investigated.The 0.94(Na_0.80K_0.16Li_0.04)_0.5Bi_0.5TiO₃-0.06Ba(Zr_0.055Ti_0.945)O₃ ceramics with a piezoelectric strain constant d₃₃ as high as 185 pC/N are obtained.The results show that the peak in the dielectric constant curve versus temperature moves rightward with the increase of K content.Accordingly,the temperature corresponding to maximum dielectric constant for the ceramics increases slightly.