Soft piezoelectric (1−x)Pb(Sc1/22Ta1/2)O3-(x)PbTiO3ceramics with high coupling factors and low QM

Abstract

The piezoelectric behavior of materials from the (1-x)Pb(Sc_1/22Ta_1/2)O₃-(x)PbTiO₃ solid solution system has been investigated. The [x = 0.45] composition in particular has exhibited an outstanding piezoelectric response [d₃₃ = 650 (pC/N). k_t = 0.5, k_p = 0.61. k₃₃ = 0.73] and a low mechanical quality factor [Q_M = 30]. These features make it a promising candidate for a variety of piezoelectric sensor applications. The difficulties involved in effectively poling a bar sample and a means to avoid these problems are also addressed.