Abstract
The lithium ionic conducting perovskite La0.57Li0.3TiO3 has been synthesised via a sol-gel method at a temperature of 700 °C. The crystallinity of the product can be greatly increased by further heat treatment at 1000 °C. In this paper the product of the sol-gel synthesis is compared with the product of conventional solid-state synthesis, and the influence of the synthesis method as well as of quenching on the crystal structure and ionic conductivity has been studied. AC-impedance measurements show two contributions to the ionic conductivity, which can be adscribed to intergranular and intragranular effects, respectively. A lower intergranular resistivity is observed for sol-gel samples, while quenching mainly affects the materials prepared by solid-state reaction. The crystal structure of the material prepared by the sol-gel method is identical to that of the material prepared by the solid state reaction, although the synthesis temperature is nearly 600 °C lower. A tetragonal superstructure is observed when either type of material is slowly cooled from 1300 °C. Quenching from the same temperature results in the suppression of that superstructure.
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Y. Inaguma, C. Liquan, M. Itoh, T. Nakamura, T. Uchida, H. Ikuta and M. Wakihara, Solid State Comm.86, 10 (1993).
H. Kawai and J. Kuwano, J. Electrochem. Soc.141(7), L78 (1994).
Program VR-INDEX, Dissertation V. Rauschenberger, Exp. Physik, University of Ulm, D-89069 Ulm.
J. Rodriguez-Carvajal, program FULLPROF. Rietveld Pattern Matching Analysis of Powder Patterns. Laboratory Leon Brioullin, Saclay (1994).
A.D. Robertson, S. Garcia Martin, A. Coats, A.R. West, J. Mater. Chem.5(9), 1405 (1995).
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Wöhrle, T., Gómez-Romero, P., Fries, T. et al. Sol-gel synthesis of the lithium-ion conducting perovskite La0.57Li0.3TiO3 effect of synthesis and thermal treatments on the structure and conducting properties. Ionics 2, 442–445 (1996). https://doi.org/10.1007/BF02375824
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DOI: https://doi.org/10.1007/BF02375824