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Enhanced Oxide Ion Diffusion in the Interlanthanide Perovskite LaTmO3

Published online by Cambridge University Press:  10 February 2011

M. Deepa and
U.V. Varadaraju
M. Deepa
Affiliation:
Materials Science Research Centre, Indian Institute of Technology MADRAS 600 036., INDIA
U.V. Varadaraju
Affiliation:
Materials Science Research Centre, Indian Institute of Technology MADRAS 600 036., INDIA
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Abstract

Recent studies on Perovskites type compounds revealed an oxide ion conductivity, higher than that of Fluorite structures. The most recent one is doped Lanthanum Gallate, which exhibits a maximum ionic conductivity of 0.14 S cm-1 and is a promising new ion conductor. The objective of this study is to synthesize and investigate the ionic conductivity of a similar compound, namely doped LaTmO3. Single phase compounds of the system La1-xSrxTm1-yMgyO3(X=0-0.2,y=0.1&0.2) were synthesized and the ionic conductivity measured at various temperatures. The results showed that ionic conductivity improved significantly with Sr doping. It showed highest oxygen ion diffusion and catalytic activity for Sr doped LaTmO3.

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References

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