Complete Sets of Elastic, Dielectric, and Piezoelectric Properties of [001]-Poled Rhombohedral Pb(Zn1/3Nb2/3)O3-(4.5-7)%PbTiO3 Single Crystals.

Abstract

Complete sets of elastic, dielectric, and piezoelectric properties of flux grown rhombohedral Pb(Zn1/3Nb2/3)O3-xPbTiO3 (PZN-PT; x = 0.0475 , 0.055, and 0.065) single crystals poled along [001] crystal direction have been determined in the present work. Their phase transformation temperatures, coercive fields, and mechanical quality factors are also provided. The results show that [001]-poled rhombohedral PZN-PT single crystals exhibit superior longitudinal piezoelectric properties ( k33 ≥ 0.90 , d33 ≈ 1580 -2500 pC/N). While the piezoelectric properties increase with PT content, the T RT and hence temperature stability of the crystal degrade accordingly. These unique properties, together with the property matrices provided in this work, can be used advantageously to design high-performance piezoelectric devices of longitudinal activation/sensing mode to suit various application needs.