2019-Sustainable Industrial Processing Summit
SIPS2019 Volume 13: Composite, Ceramic, Nanomaterials, Polymers, and Mathematics
| Editors: | F. Kongoli, M. de Campos, S. Lewis, S. Miller, S. Thomas |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2019 |
| Pages: | 171 pages |
| ISBN: | 978-1-989820-12-4 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Functional properties of BaTiO3-based ceramics, thin films and nanostructures
Lucian Pintilie1; Ioana Pintilie1;1NATIONAL INSTITUTE OF MATERIALS PHYSICS, Magurele, Romania;
Type of Paper: Regular
Id Paper: 362
Topic: 16
Abstract:
BaTiO3 is a well-known ferroelectric material with perovskite structure. The Sr doping allows a fine tuning of the functional properties, including the transition temperature, the dielectric constant and the pyroelectric coefficient. Another way to tune the properties is to control the size of the crystalline grains.
Here we present results on structural, dielectric and pyroelectric properties of some BaTiO3-based materials, showing how the properties changes as the structure changes from bulk ceramics, to epitaxial films and nanocrystals. Sr-doped BaTiO3 ceramics, in the 20-40 % range, show interesting pyroelectric properties, making them attractive for infrared detection. The dielectric properties changes significantly with the Sr doping, as proven by the results of wide-band dielectric spectroscopy. The properties changes dramatically when going to epitaxial thin films, with lower values for dielectric constant but larger leakage currents. Finally, preliminary results on nanometer scale BaTiO3 crystals are presented.