Effect of Annealing Temperature on the Li\(^{ + }\) Ionic Conductivity of La\(_{0.67 - x}\)Li\(_{3x}\)TiO\(_{3 }\)

Le Dinh Trong; Pham Duy Long; Nguyen Nang Dinh

doi:10.15625/0868-3166/19/4/6409

Effect of Annealing Temperature on the Li\(^{ + }\) Ionic Conductivity of La\(_{0.67 - x}\)Li\(_{3x}\)TiO\(_{3 }\)

Le Dinh Trong, Pham Duy Long, Nguyen Nang Dinh

Author affiliations

Authors

Le Dinh Trong Faculty of Physics, Hanoi Pedagogical University No. 2
Pham Duy Long Institute of Materials Science, VAST
Nguyen Nang Dinh College of Technology (VNU University of Engineering and Technology), Vietnam National University, Hanoi

DOI:

https://doi.org/10.15625/0868-3166/19/4/6409

Abstract

Perovskite La_0.67-xLi_3xTiO₃ with x = 0.10, 0.11, 0.12 and 0.13 were firstly annealed at 800 ^oC then treated by reactive milling, followed by post-annealing at temperatures from 1100 to 1200^oC. The crystalline structure of grain and grain-boundary were characterized by XRD and SEM. The impedance measurements showed that nanocrystalline La_0.67-xLi_3xTiO₃ after being annealed at 1150 ^oC possessed a grain conductivity as high as 1.3×10^-3 S.cm^-1. The grain-boundary conductivity was enhanced one order in magnitude after annealing at temperature higher 1100^oC and consists of 5.8×10^-5 S.cm^-1. The results have also showed the limitation of the adiabatic thermal treatment for the improvement of the grain-boundary conductivity and suggested the way to overcome the limitation by rapidly cooling the samples from the high temperature to room temperature.

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Published

31-12-2009

How to Cite

[1]

L. D. Trong, P. D. Long, and N. N. Dinh, “Effect of Annealing Temperature on the Li\(^{ + }\) Ionic Conductivity of La\(_{0.67 - x}\)Li\(_{3x}\)TiO\(_{3 }\)”, Comm. Phys., vol. 19, no. 4, pp. 235–242, Dec. 2009.

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Vol. 19 No. 4 (2009)

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