Synthesis and piezoelectric properties of (1-x)(Na_(0.5)K_(0.5))NbO_3-x(Ba_(0.95)Sr_(0.05))TiO_3 ceramics

摘要

(1-x)(Na_(0.5)K_(0.5))NbO_3-x(Ba_(0.95)Sr_(0.05))TiO_3 [(1-x)NKN-xBST] ceramics were synthesized by the conventional solid-state sintering, and their microstructure and piezoelectric properties were investigated. The sintering temperature of the specimens was 1075℃ in air atmosphere and a morphotropic phase boundary (MPB) was observed in the specimens with 0.03 < x < 0.05. Compared with the piezoelectric properties of the NKN ceramics, the enhanced d_(33) value of 136 pC/N and ε_~T/ε_o value of 671 were obtained for the (1-x)NKN-xBST specimens with x = 0.03.