Highly Textured BaTiO 3 via Templated Grain Growth and Resulting Polarization Reversal Dynamics
- Department of Physics &, Astronomy Iowa State University Ames Iowa 50011
- Department of Mechanical and Aerospace Engineering University of Virginia Charlottesville Virginia 22904
- Sandia National Laboratories Albuquerque New Mexico 87185
- Department of Materials Science and Engineering Iowa State University Ames Iowa 50011
- Department of Mechanical, Industrial, and Manufacturing Engineering Oregon State University Corvallis Oregon 97331
- EaglePicher Technologies Joplin Missouri 64802
- Department of Materials Science and Engineering Missouri S&,T Rolla Missouri 65409
- Department of Metallurgical and Materials Engineering Colorado School of Mines Golden Colorado 80401
Samples of bulk textured polycrystalline BaTiO 3 ceramics were fabricated using a templated grain growth ( TGG ) approach in order to investigate effects of polycrystallinity and texture related to ferroelectric domain reversal under high‐power drive conditions. Barium titanate platelets were formed via two‐step topochemical conversion of bismuth titanate platelets grown via molten salt synthesis, then aligned via tape casting within a matrix of fine BaTiO 3 powder. The coarse‐grained parts showed a high degree of crystallographic texture after sintering. Combined with ceramics of similar density and polycrystallinity, but random orientation and commercial single‐crystal specimens, this sample set enabled direct isolation of crystallographic texture and polycrystallinity as the primary variables for high‐power polarization reversal studies. These studies have also demonstrated a link between grain size and polarization reversal time that strongly suggests that grain boundaries serve effectively as nucleation sites during the ferroelectric switching process.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1400530
- Journal Information:
- Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Vol. 99 Journal Issue: 3; ISSN 0002-7820
- Publisher:
- Wiley-BlackwellCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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