Premium
The Effect of Texture and Microstructure on the Macroscopic Properties of Polycrystalline Piezoelectrics: Application to Barium Titanate and PZN–PT
Author(s) -
García R. Edwin,
Craig Carter W.,
Langer Stephen A.
Publication year - 2005
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00109.x
Subject(s) - tetragonal crystal system , crystallite , texture (cosmology) , materials science , microstructure , barium titanate , anisotropy , piezoelectricity , electrostriction , condensed matter physics , mineralogy , crystal (programming language) , single crystal , crystal structure , crystallography , composite material , ceramic , optics , chemistry , physics , metallurgy , programming language , artificial intelligence , computer science , image (mathematics)
The effects of crystallographic texture and microstructure are analyzed for polycrystalline tetragonal BaTiO 3 , pseudotetragonal PZN–PT, and cubic BaTiO 3 . For tetragonal BaTiO 3 and pseudotetragonal PZN–PT, we demonstrate that a high anisotropy of the single‐crystal properties induces an apparent enhancement in the macroscopic piezoelectric response. For tetragonal BaTiO 3 , the predicted macroscopic piezoelectric constants d 31 and d 33 are enhanced with respect to its single‐crystal value at the expense of the spatial contributions from d 15 . For samples possessing fiber texture, an optimal response is predicted for samples that are not perfectly textured. Similarly, an apparent enhancement of the macroscopic value of d 15 is predicted for PZN–PT. For cubic BaTiO 3 , the low anisotropy of the underlying crystal properties induces a uniform decrease of the macroscopic electrostrictive constant, Q 11 , with decreasing texture. A completely random polycrystal provides 0.85±0.05 times its single‐crystal response.