Thomas, CI, Kuang, XJ, Deng, ZQ, Niu, HJ, Claridge, JB 
ORCID: 0000-0003-4849-6714 and Rosseinsky, MJ ORCID: 0000-0002-1910-2483
(2010)
Phase Stability Control of Interstitial Oxide Ion Conductivity in the La1+xSr1-xGa3O7+x/2 Melilite Family.
CHEMISTRY OF MATERIALS, 22 (8).
pp. 2510-2516.
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PDF (C.I. Thomas, X. Kuang, Z. Deng, H. Niu, J. B. Claridge and M. J. Rosseinsky*, Phase stability control of interstitial oxide ion conductivity in the La1+xSr1-xGa3O7+x/2 melilite family. Chemistry of Materials 22, 2510 (2010))
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Abstract
The two-dimensional polyhedral anion network melilites La1+xSr1-xGa3O7+0.5x exhibit interstitial oxide ion conductivity. The solid solution is shown to extend to x = 0.64 and the variation of the conductivity with x is investigated. At high temperatures all of these compounds adopt the typical tetragonal melilite structure. When x > 0.6, cooling below 600 °C results in a reversible phase transition to an orthorhombic structure which reduces the ionic conductivity. Quenching experiments have shown the tetragonal structure has a higher conductivity compared to the orthorhombic structure of the same composition. Short-range order effects associated with this transition exercise an important influence on the composition- and temperature-dependence of the conductivity.
| Item Type: | Article |
|---|---|
| Additional Information: | ## TULIP Type: Articles/Papers (Journal) ## |
| Uncontrolled Keywords: | FUEL-CELLS, ELECTRICAL-CONDUCTION, ELECTROLYTES, STRONTIUM, CERAMICS, BEHAVIOR, LAGAO3 |
| Subjects: | ?? QD ?? |
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 11 Nov 2011 13:54 |
| Last Modified: | 16 Dec 2022 04:36 |
| DOI: | 10.1021/cm903132w |
| Publisher's Statement : | This document is the Accepted Manuscript version of a Published Work that appeared in final form in Chemistry of Materials, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/cm903132w. |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/4473 |
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