NbO3 Piezoelectric Ceramics Research Articles

Influence of Sintering Temperatures on the Properties of Lithium Sodium Potassium Niobate Piezoelectric Ceramics

ABSTRACTLithium sodium potassium niobate (Li, Na, K)NbO3 (LNKN) piezoelectric ceramics were prepared by using conventional solid state process. The phase structures of LNKN ceramics were characterized by x-ray diffraction (XRD). The dielectric properties of LNKN ceramics have been also studied at different temperature and frequency. It was found that LNKN ceramics have high Curie temperature Tc(about 460°C), and relatively high piezoelectric constant d33 (∼200pC/N) and high electromechanical coupling coefficient kp(∼0.40). Both of the piezoelectric constant d33 and electromechanical coupling coefficient kp of LNKN ceramics decreased with the increasing of sintering temperature. The piezoelectric property dependence of composition of LNKN ceramics has also been studied.