0.99(K_(0.45)Na_(0.52)Li_(0.03))(Nb_(1-x)Sb_x)O_3-0.01BiScO_3 lead-free ceramics with excellent piezoelectric properties and broad sintering temperature

摘要

0.99(K_(0.45)Na_(0.52)Li_(0.03))(Nb_(1-x)Sb_x;)O_3-0.01BiScO_3 (KNLNS_x-BS) ceramics were designed for excellent piezoelectric properties with wide sintering temperature. The orthorhombic (R) and tetragonal (7) phases coexistence was identified in the composition range of 0.05 ≤ x ≤ 0.07, and the optimum piezoelectric properties of d_(33)=341 pC/N and k_p=52.1% were achieved at x=0.06. The ceramics exhibit stable piezoelectric properties (d_(33)=319-341 pC/N) in the sintering temperature range of 1080-1140 °C. As a result, the broad sintering temperature and excellent piezoelectric properties indicate that the ceramics are promising candidates for practical applications.