Fabrication and properties of PYN–PMN–PZT quaternary piezoelectric ceramics for high-power, high-temperature applications

Abstract

xPb(Yb 1/2Nb 1/2)O 3 – 0.05Pb(Mn 1/3Nb 2/3)O 3 – (0.95 – x)Pb(Zr 0.48Ti 0.52)O 3 (PYN–PMN–PZT) quaternary piezoelectric ceramics were prepared by a traditional ceramics process. The effects of Pb(Yb 1/2Nb 1/2)O 3 (PYN) content on the phase structure, electrical properties and Curie temperature of the quaternary system were investigated in detail. The phase structure of PYN–PMN–PZT ceramics changed from tetragonal to rhombohedral with increasing PYN content. The piezoelectric coefficient ( d 33), the electromechanical coupling factor ( K p ) and the dielectric constant (ε 33 T/ε 0) reach maximum values near the morphotropic phase boundary (MPB), whereas the mechanical quality factor ( Q m ) decreases. The sintered PYN–PMN–PZT ceramics exhibit high T C , and as the PYN content increases, T C decreases slightly. The MPB of the tetragonal and rhombohedral phase coexist and are located at a PYN composition of 0.12 ≤ x ≤ 0.14.The composition of PYN–PMN–PZT around the MPB showed high d 33 (> 300pC/N), K p (> 0.50), Q m (> 1000) and T C (> 350 °C), meaning it is a very promising piezoelectric material for high-power and high-temperature applications.