Highly Textured BaTiO₃ via Templated Grain Growth and Resulting Polarization Reversal Dynamics
Samples of bulk textured polycrystalline BaTiO3 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 BaTiO3 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.
W. Meier and K. E. Meyer and D. F. Sava Gallis and M. A. Blea-Kirby and J. Roth and D. Felman and T. Breuer and G. J. Denison and F. J. Zutavern and W. Huebner and G. L. Brennecka, "Highly Textured BaTiO₃ via Templated Grain Growth and Resulting Polarization Reversal Dynamics," Journal of the American Ceramic Society, vol. 99, no. 3, pp. 922-929, Wiley-Blackwell Publishing, Mar 2016.
The definitive version is available at https://doi.org/10.1111/jace.14048
Materials Science and Engineering
Keywords and Phrases
Crystallographic textures; Ferroelectric domains; Ferroelectric switching; Investigate effects; Molten salt synthesis; Polarization reversals; Random orientations; Templated grain growth
International Standard Serial Number (ISSN)
Article - Journal
© 2016 American Ceramic Society, All rights reserved.
01 Mar 2016