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Electric field induced splitting of the preferred orientation in PMN‐PT textured ceramics
Author(s) -
Gollapudi Sreenivasulu,
Gao Min,
Li Jiefang,
Chang Yunfei,
Messing Gary L.,
Meyer Richard J.,
Viehland Dwight
Publication year - 2019
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/jace.16462
Subject(s) - materials science , poling , texture (cosmology) , pole figure , ceramic , orientation (vector space) , symmetry (geometry) , condensed matter physics , piezoelectricity , monoclinic crystal system , phase (matter) , crystallography , composite material , crystal structure , geometry , microstructure , ferroelectricity , dielectric , mathematics , optoelectronics , chemistry , physics , artificial intelligence , computer science , image (mathematics) , organic chemistry
We have performed studies of the orientation distribution in <001> C textured, 0.03(Na 1/2 Bi 1/2 )TiO 3 ‐ 0.97[0.715Pb(Mg 1/3 Nb 2/3 )TiO 3 ‐ 0.285PbTiO 3 ] (0.03NBT‐0.97[PMN‐28.5PT]) ceramics by a pole figure method, comparing the results to those for PMN‐PT single crystal and polycrystal samples. The pole figures about the (001) zone are found to have monoclinic, Ma, phase for textured ceramics in the annealed condition and were similar to those for electrically poled single crystals. However, electrical poling of the textured ceramics resulted in a doublet splitting of the orientation distribution about the direction that defined the original grain texturing. Studies of pole figures about other high‐symmetry zones also revealed the development of some degree of preferred orientation along the in‐plane directions after poling. Our findings demonstrate that E ‐field induced phase transformation and domain textures superimpose with that of preferred grain orientations, giving rise to a unique texture symmetry for PMN‐PT. The texture symmetry changes are driven by minimization of the elastic strain energy, and have an important effect upon the piezoelectric properties.