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Title: Piezoelectricity and local structural distortions in (Na{sub 0.5}Bi{sub 0.5}){sub 1-x}Sr{sub x}TiO{sub 3}-Bi{sub 12}TiO{sub 20} flexoelectric-type polar ceramics

Abstract

We have previously described sintered Na{sub 0.5}Bi{sub 0.5}TiO{sub 3}-Bi{sub 12}TiO{sub 20} composites as flexoelectric-type polar ceramics because they have a net macroscopic flexoelectric polarization. Here, we report on the universal existence of the macroscopic flexoelectric polarization in the (Na{sub 0.5}Bi{sub 0.5}){sub 1-x}Sr{sub x}TiO{sub 3}-Bi{sub 12}TiO{sub 20} system, in which enhanced piezoelectricity is observed. By combining Raman spectroscopy and x-ray photoelectron spectroscopy techniques, we have identified the local flexoelectric polarization as distorted BiO{sub 5} polyhedra and TiO{sub 6} octahedra in the SrTiO{sub 3}-Bi{sub 12}TiO{sub 20} ceramic. The macroscopic polarization may be due to the partial alignment of these distorted units located within the grain boundary amorphous phases. Bi{sub 12}TiO{sub 20} could have an important role in these flexoelectric-type polar ceramics.

Authors:
; ; ; ; ;  [1]
  1. School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100 (China)
Publication Date:
OSTI Identifier:
22089358
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 101; Journal Issue: 6; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AMORPHOUS STATE; BISMUTH COMPOUNDS; CERAMICS; COMPOSITE MATERIALS; DIELECTRIC MATERIALS; GRAIN BOUNDARIES; PIEZOELECTRICITY; POLARIZATION; RAMAN SPECTRA; RAMAN SPECTROSCOPY; SINTERING; SODIUM COMPOUNDS; STRONTIUM TITANATES; TITANATES; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Wang, L. H., Zhao, M. L., Wang, C. L., Wang, J., Kuai, W. J., and Tao, X. T. Piezoelectricity and local structural distortions in (Na{sub 0.5}Bi{sub 0.5}){sub 1-x}Sr{sub x}TiO{sub 3}-Bi{sub 12}TiO{sub 20} flexoelectric-type polar ceramics. United States: N. p., 2012. Web. doi:10.1063/1.4744952.
Wang, L. H., Zhao, M. L., Wang, C. L., Wang, J., Kuai, W. J., & Tao, X. T. Piezoelectricity and local structural distortions in (Na{sub 0.5}Bi{sub 0.5}){sub 1-x}Sr{sub x}TiO{sub 3}-Bi{sub 12}TiO{sub 20} flexoelectric-type polar ceramics. United States. https://doi.org/10.1063/1.4744952
Wang, L. H., Zhao, M. L., Wang, C. L., Wang, J., Kuai, W. J., and Tao, X. T. Mon . "Piezoelectricity and local structural distortions in (Na{sub 0.5}Bi{sub 0.5}){sub 1-x}Sr{sub x}TiO{sub 3}-Bi{sub 12}TiO{sub 20} flexoelectric-type polar ceramics". United States. https://doi.org/10.1063/1.4744952.
@article{osti_22089358,
title = {Piezoelectricity and local structural distortions in (Na{sub 0.5}Bi{sub 0.5}){sub 1-x}Sr{sub x}TiO{sub 3}-Bi{sub 12}TiO{sub 20} flexoelectric-type polar ceramics},
author = {Wang, L. H. and Zhao, M. L. and Wang, C. L. and Wang, J. and Kuai, W. J. and Tao, X. T.},
abstractNote = {We have previously described sintered Na{sub 0.5}Bi{sub 0.5}TiO{sub 3}-Bi{sub 12}TiO{sub 20} composites as flexoelectric-type polar ceramics because they have a net macroscopic flexoelectric polarization. Here, we report on the universal existence of the macroscopic flexoelectric polarization in the (Na{sub 0.5}Bi{sub 0.5}){sub 1-x}Sr{sub x}TiO{sub 3}-Bi{sub 12}TiO{sub 20} system, in which enhanced piezoelectricity is observed. By combining Raman spectroscopy and x-ray photoelectron spectroscopy techniques, we have identified the local flexoelectric polarization as distorted BiO{sub 5} polyhedra and TiO{sub 6} octahedra in the SrTiO{sub 3}-Bi{sub 12}TiO{sub 20} ceramic. The macroscopic polarization may be due to the partial alignment of these distorted units located within the grain boundary amorphous phases. Bi{sub 12}TiO{sub 20} could have an important role in these flexoelectric-type polar ceramics.},
doi = {10.1063/1.4744952},
url = {https://www.osti.gov/biblio/22089358}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 6,
volume = 101,
place = {United States},
year = {2012},
month = {8}
}