High‐Performance [001]c‐Textured PNN‐PZT Relaxor Ferroelectric Ceramics for Electromechanical Coupling Devices

Abstract

Abstract [001] C ‐Textured 0.55Pb(Ni 1/3 Nb 2/3 )O 3 –0.15PbZrO 3 –0.3PbTiO 3 (PNN‐PZT) ceramics are prepared by the templated grain‐growth method using BaTiO 3 (BT) platelet templates. Samples with different template contents are fabricated and compared in terms of texture fraction, microstructure, and piezoelectric, ferroelectric and dielectric properties. High piezoelectric performance ( d 33 = 1210 pC N −1 , d 33 * = 1773 pm V −1 at 5 kV cm −1 ) and high figure of merit g 33 ⋅ d 33 (21.92 × 10 −12 m 2 N −1 ) are achieved in the [001] C ‐textured PNN‐PZT ceramic with 2 vol% BaTiO 3 template, for which the texture fraction is 82%. In addition, domain structures of textured PNN‐PZT ceramics are observed and analyzed, which provide clues to the origin of the giant piezoelectric and electromechanical coupling properties of PNN‐PZT ceramics.