Materials and Nanoscience, Nebraska Center for (NCMN)
Date of this Version
In this letter, we report the predictions on the effective piezoelectric coefficients and electromechanical coupling factors of ferroelectric ceramics BaTiO 3 and Pb(Mg 1/3Nb 2/3)O 3–PbTiO 3 (PMN-PT) with various fiber textures, including , , and , using a two-scale micromechanical model that accounts for microstructural phenomena at both domain and grain levels. It was observed that for BaTiO 3 the  texture is optimal with highest d 31 and d 33, while for PMN-PT  texture is optimal despite the fact that -oriented single-crystalline PMN-PT has higher d 32 than that of -oriented PMN-PT single crystal. In fact, -textured PMN-PT ceramics have much smaller piezoelectric coefficients d 32 and d 33 than does -oriented PMN-PT single crystal. It is also noted that -textured BaTiO 3 and PMN-PT ceramics have even higher electromechanical coupling factor k 31 than that of -oriented single crystals.
Published in APPLIED PHYSICS LETTERS 86, 262909 2005. © 2005 American Institute of Physics. Used by permission.