Table of Contents
Texture, Stress, and Microstructure
Volume 2010 (2010), Article ID 910793, 10 pages
http://dx.doi.org/10.1155/2010/910793
Research Article

Thermal and Electric Field-Dependent Evolution of Domain Structures in Polycrystalline BaTiO3 Using the 3D-XRD Technique

1Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA
2Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
3Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, USA
4Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA

Received 23 June 2010; Accepted 1 October 2010

Academic Editor: Adam Morawiec

Copyright © 2010 Mesut Varlioglu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The evolution of ferroelectric domain structures inside a single grain embedded in a polycrystalline BaTiO3 ceramic was investigated under temperature and electric field using the three-dimensional X-ray diffraction (3D-XRD) method. The orientation of domains within the grain was studied during the phase transformation from the cubic to tetragonal crystal structure. The peak widths broadened from 0.10 ± 0.01 to 0.29±0.08 along the azimuthal direction during cooling. Four individual tetragonal domain structures were developed from the cubic grain. A twinning model based on {101} habit planes is discussed. While the twinning model predicts 89.47 misorientation between 90 domains and 1.049 misorientation between domain variants, the measured misorientations neither support the twinning model nor are the domain structures mutually orthogonal. The average misorientation of the domain structures at room temperature with respect to the cubic grain was about 0.3. Upon application of an electric field, the volume fractions of the domain structures changed systematically favoring growth of domain structures with small polarization angle with respect to applied field direction. No rotation of domain structures was observed upon application of an electric field which is consistent with domain boundary migration.