Characterization and piezoelectric thermal stability of PIN-PMN-PT ternary ceramics near the morphotropic phase boundary

The phase structure and piezo/dielectric properties of xPb(In1/2Nb1/2)O-3-yPb(Mg1/3Nb2/3)O-3-zPbTiO(3) (PIN-PMN-PT x/y/z) ternary ceramics with morphotropic phase boundary (MPB) composition were investigated. It was found that Curie temperatures of choosing composition changed from 165 degrees C to 293 degrees C and the piezoelectric properties are almost the same at room temperature in PIN-PMN-PT system near MPB. The piezoelectric coefficient d(33) and electromechanical coupling factor k(P) are higher than 440 pC/N and 60%, respectively. Temperautre and dc bias dependence of piezoelectric response for PIN-PMN-PT ceramics were measured. The usage temperature range was found to be improved, compared with PMN-PT single crystal near MPB. (C) 2009 Elsevier B.V. All rights reserved.