Influence of calcination temperature on the piezoelectric properties of Ag2O doped 0.94(K0.5Na0.5)NbO3–0.06LiNbO3 ceramics

The effects of calcination temperature on the bulk density, piezoelectric, and ferroelectric properties were investigated for the Ag2O doped 0.94(K0.5Na0.5)NbO3–0.06LiNbO3 ceramics. The calcination temperatures were varied from 750 to 950 °C by 50 °C differences. An tetragonal XRD pattern, consistent with single-phase 0.94(K0.5Na0.5)NbO3–0.06LiNbO3 was obtained after calcination at 850 °C for 2 h. And the experimental results showed that Ag2O doped 0.94(K0.5Na0.5)NbO3–0.06LiNbO3 ceramics calcined at 850 °C had a remnant polarization Pr=24.5 μC/cm2, bulk density=4.32 g/cm3, piezoelectric constant d33=282 pC/N and electromechanical coefficient kp=37.8%.