Electrical conductivity of Zn-doped high temperature proton conductor LaNbO4

Electrical conductivity of Zn-doped high temperature proton conductor LaNbO4 Zn-doped LaNbO4 (La1−xZnxNbO4−δ, LZ100x) was prepared by a solid-state reaction method with x=0, 0.005, 0.01, 0.015, 0.03 and 0.05 and investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and conductivity measurement. There were no XRD and TEM evidences of formed secondary phases in the composition range of x≤0.03 due to the sensitivity. However, the solubility of Zn, less than 1.0mol.%, was reasonable, according the variety of the grain sizes, conductivity, as well as the activation energy for the conductivity, with the increasing concentration of Zn. The conductivity of LaNbO4 was improved by one to two orders of magnitude with Zn doping in the research range; and the highest conductivity of 9.8×10−4Scm−1 was obtained with LZ0.5 at 900°C in wet air. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Solid State Ionics Elsevier

Electrical conductivity of Zn-doped high temperature proton conductor LaNbO4

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Publisher
Elsevier
Copyright
Copyright © 2015 Elsevier B.V.
ISSN
0167-2738
eISSN
1872-7689
D.O.I.
10.1016/j.ssi.2015.06.011
Publisher site
See Article on Publisher Site

Abstract

Zn-doped LaNbO4 (La1−xZnxNbO4−δ, LZ100x) was prepared by a solid-state reaction method with x=0, 0.005, 0.01, 0.015, 0.03 and 0.05 and investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and conductivity measurement. There were no XRD and TEM evidences of formed secondary phases in the composition range of x≤0.03 due to the sensitivity. However, the solubility of Zn, less than 1.0mol.%, was reasonable, according the variety of the grain sizes, conductivity, as well as the activation energy for the conductivity, with the increasing concentration of Zn. The conductivity of LaNbO4 was improved by one to two orders of magnitude with Zn doping in the research range; and the highest conductivity of 9.8×10−4Scm−1 was obtained with LZ0.5 at 900°C in wet air.

Journal

Solid State IonicsElsevier

Published: Oct 1, 2015

References

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