Voisin, Christophe and Guillemet, Sophie
and Dufour, Pascal and Tenailleau, Christophe and Han, Hyuksu and Nino, Juan C.
Influence of Oxygen Substoichiometry on the Dielectric Properties of BaTiO3-δNanoceramics Obtained by Spark Plasma Sintering.
(2013)
International Journal of Applied Ceramic Technology, 1-2. 2-12. ISSN 1546-542X
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(Document in English)
PDF (Author's version) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader 973kB |
Official URL: http://dx.doi.org/10.1111/ijac.12058
Abstract
Oxygen-deficient BaTiO3-d nanoceramics were prepared by spark plasma sintering. Partially reduced raw nanopowders led to unusual dielectric properties. A short postsintering treatment was performed to reach a high er/tan d, which makes them attractive for industrial applications such as low-frequency capacitors. Surprisingly, our ceramics also remained black even after annealing for 5 days at 850°C in air, indicating the presence of barriers against oxygen diffusion. This exceptional behavior in pure barium titanate was consistent with a core–shell structure made of semiconductive grains and insulating grain boundaries, due to the presence of Ti3+/Ti4+ and oxygen vacancies.
| Item Type: | Article |
|---|---|
| Additional Information: | Thanks to Wiley-Blackwell. The definitive version is available at http://onlinelibrary.wiley.com/doi/10.1111/ijac.12058 /abstract;jsessionid=5EAF2923C8780212C40B00CDDAAD9B66.d02t03 |
| HAL Id: | hal-03526521 |
| Audience (journal): | International peer-reviewed journal |
| Uncontrolled Keywords: | |
| Institution: | French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE) Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE) Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE) Other partners > University of Florida (USA) |
| Laboratory name: | |
| Statistics: | download |
| Deposited On: | 23 Jul 2013 09:38 |
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