Le, Dinh Trong and Nguyen, Nang Dinh and Pham, Duy Long (2014) Annealing Effect on the Ionic conductivity of La0,67-xLi3xTiO3 made by Double Mechanical Alloying Method. Journal of Materials Science and Engineering B, 4 (4). pp. 86-94. ISSN 2161-6221
Full text not available from this repository.Abstract
Perovskite La2/3-xLi3xTiO3 with x = 0.11 (called LLTO11) powders were prepared by double mechanical alloying method from TiO2 (99.99%), Li2CO3, (99.99%) and La2O3 (99.9%) powders, in ideal cation stoichiometry for La2/3-xLi3xTiO3. The obtained single phase of LLTO11 powder was isostatically pressed under a pressure of 450 MPa and annealed at a temperature ranging from 1,100 °C to 1,250 °C. Optimal morphology and grain structure for the ionic conductivity of the samples were achieved at annealing temperature of 1,200 °C. For this ceramic, the lithium ionic grains and grain-boundaries conductivities at room temperature possess a value of 1.5 × 10-3 S/cm and 4.8 × 10-5 S/cm, respectively. The improvement in the grain-boundaries conductivity was explained due to the decrease of the number of grains, included grain boundaries and the diminution of the pores in LLTO samples annealed at 1,200 °C. The obtained results suggest useful applications of La(2/3)-xLi3xTiO3 (x = 0.11) ceramics for the production of the solid state electrolytes,for high-temperature Li-ionic batteries, in particular.
| Item Type: | Article |
|---|---|
| Subjects: | Engineering Physics |
| Divisions: | Faculty of Engineering Physics and Nanotechnology (FEPN) |
| Depositing User: | Ms. Cam Le Tran Thi |
| Date Deposited: | 19 Nov 2015 04:10 |
| Last Modified: | 19 Nov 2015 09:20 |
| URI: | http://eprints.uet.vnu.edu.vn/eprints/id/eprint/1254 |
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