Abstract: The 0.98 (Na0.44K0.52)Nb0.84O3-0.02Li0.04 (Sb0.06Ta0.1)O3-0.5 mol%CuO ceramics have been fabircated by ordinary sintering technique and the effect of various calcination method on the electrical propertis and microstructure have been studied. It was observed that the various calcination method influenced the elelctrical properties and structural properties of the 0.98NKN-0.02LST-0.5 mol%CuO ceramics with the optimum piezoelectric constant (d33) and electromechanical coupling factor (kp) at room temperature of about 155ρC/N and 0.349, respectively, from 0.98NKN-0.02LST-0.5 mol%CuO ceramics sample. The curie temperature (Tc) of this ceramic was found at 440℃. The 0.98NKN-0.02LST-0.5 mol%CuO ceramics are a promising lead-free piezoelectric ceramics.
