TY  - JOUR
ID  - SisLab1254
UR  - https://eprints.uet.vnu.edu.vn/eprints/id/eprint/1254/
IS  - 4
A1  - Le, Dinh Trong
A1  - Nguyen, Nang Dinh
A1  - Pham, Duy Long
Y1  - 2014///
N2  - 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.
JF  - Journal of Materials Science and Engineering B
VL  - 4
SN  - 2161-6221
TI  - Annealing Effect on the Ionic conductivity of La0,67-xLi3xTiO3 made by Double Mechanical Alloying Method
SP  - 86
AV  - none
EP  - 94
ER  -