Abstract
Piezoelectric ceramics in the PbSnO3-PbZrO3-PbTiO3 (PZST) ternary system with pure perovskite structure were synthesized by a conventional solid state reaction method with the compositions near the morphotropic phase boundary (MPB). The influences of Sn content on dielectric, piezoelectric, and ferroelectric properties of Pb(ZrxSnyTi1−x−y)O3 ceramics were investigated. The experimental results showed that, with increasing the Sn content along the Ti = 0.48 line, the optimized sintering temperature, tetragonality, and Curie temperature (TC) decreased monotonically. The polarization–electric field hysteresis loops show a pinning effect in some low Sn compositions. Frequency dependence of the pinning effect was studied accompanied with current–electric field curve analysis. The PZST compositions near MPB show promising advantages for practical applications.
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