Effects of AgSbO_3 on the piezoelectric/dielectric properties and phase transition of Li_2O doped NKN lead-Free piezoelectric ceramics

摘要

The effect of AgSbO_3 on the piezoelectric properties of (K_(0.5)Na_(0.5))_(0.95)Li_(0.05)NbO_3 was examined. The AgSbO_3 doped KNLN samples sintered at 1050°C showed the maximum values of the sintering density of 4.56 g/cm~3 compared to un-doped KNLN samples sintered at same temperature with 4.25 g/cm~3. Moreover, the addition of AgSbO_3 enhanced the piezoelectric and dielectric properties. Piezoelectric constant (d_(33)), the planar electromechanical coupling factor (k_p) and the relative dielectric permittivity (K_(ss)~T) increased up to 230pC/N, 43.5%, 1080, respectively, with addition of AgSbO_3.