Proton conduction in layered perovskite oxides

Thangadurai, V. ; Shukla, A. K. ; Gopalakrishnan, J. (1994) Proton conduction in layered perovskite oxides Solid State Ionics, 73 (1-2). pp. 9-14. ISSN 0167-2738

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Investigation of the electrical conductivity behavior of layered perovskite oxides, H2Ln2Ti3O10 (Ln = La, Nd, Sm and Gd), has revealed that the materials exhibit moderate conductivity ( ~10-5 ohms-1 cm-1 at 400°C) in hydrogen atmosphere, that is likely to be protonic in origin. It is suggested that the anion-deficient layered perovskite, Ln2Ti3O9, formed in situ by dehydration, may interact with water vapor in hydrogen atmosphere in a manner analogous to that of yttria-doped BaCeO3 and SrCeO3 giving rise to the protonic conductivity. HLa2Ti2NbO10 and HCa2Nb3O10 possessing a slightly different layered perovskite structure, exhibit a higher conductivity (~10-4-10-3ohms-1cm-1) under the same conditions.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Defect Conductivity; Ionic Conductivity; Proton; Perovskite; Titanium Oxide
ID Code:12334
Deposited On:10 Nov 2010 05:40
Last Modified:17 Jul 2012 08:35

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