Lead-free 0.98(Na0.5,K0.5)NbO3-0.02Li(Sb0.17Ti0.83)O3 (hereafter 0.98NKN-0.02LST) ceramics doped with Ag2O were prepared using a conventional mixed oxide method. The specimen showed superior structural and electrical properties when 1 mol% Ag2O was doped. For the 0.98NKN-0.02LST+1.0 mol%Ag2O ceramics sintered at 1,100℃, piezoelectric constant (d33) of sample showed the optimum values of 207 pC/N. The 0.98NKN-0.02LST+1.0 mol%Ag2O ceramics are a promising candidate for lead-free piezoelectric materials.
