|
Home |
| Browse | |
|
|
Communities & Collections |
|
|
Issue Date |
|
|
Author |
|
|
Title |
|
|
Subject |
| Sign on to: | |
|
|
Receive email updates |
|
|
My APO authorized users |
|
|
Edit Profile |
|
|
|
|
|
About DSpace |
ANSTO Publications Online >
Journal Publications >
Journal Articles >
Please use this identifier to cite or link to this item:
http://apo.ansto.gov.au/dspace/handle/10238/1435
|
| Title: | Mixed conductivity, thermal expansion and defect chemistry of A-site deficient LaNi(0.5)Ji(0.5)O(3-delta). |
| Authors: | Yakovlev, SO Kharton, VV Yaremchenko, AA Kovalevsky, AV Naumovich, EN Frade, JR |
| Keywords: | Thermal Expansion Defects Ionic Conductivity Electric Conductivity Perovskites Oxygen |
| Issue Date: | 19-Mar-2007 |
| Publisher: | Elsevier |
| Citation: | Yakovlev, S., Kharton, V., Yaremchenko, A., Kovalevsky, A., Naumovich, E., & Frade, J. (2007). Mixed conductivity, thermal expansion and defect chemistry of A-site deficient LaNi(0.5)Ji(0.5)O(3-delta). Journal of the European Ceramic Society, 27(13-15), 4279-4282. |
| Abstract: | This work is focused on the analysis of defect chemistry and partial electronic and oxygen ionic conductivities of A-site deficient La1-xNi0.5Ti0.5O3-delta (x = 0.05 and 0.10). The orthorhombic-to-rhombohedral phase transition was monitored by means of dilatometry and high-temperature X-ray diffractometry. The average thermal expansion coefficients vary in the range (8.5-13.0) x 10(-6) K-1, increasing with temperature and A-site deficiency. The ion transference numbers determined by the Faradaic efficiency measurements are lower than 0.1% at 900-975 degrees C in air. Activation energies of the oxygen ionic conductivity at 897-977 degrees C are 430 and 220 kJ/mol for x = 0.05 and 0.10, respectively. Atomistic simulation demonstrated high stability of ternary defect clusters formed by the vacant sites in the A-sublattice, oxygen vacancies and W, cations, which leads to a very low level of mixed conductivity. © 2007, Elsevier Ltd. |
| URI: | http://dx.doi.org/10.1016/j.jeurceramsoc.2007.02.134 http://apo.ansto.gov.au/dspace/handle/10238/1435 |
| ISSN: | 0955-2219 |
| Appears in Collections: | Journal Articles |
Files in This Item: There are no files associated with this item. |
Items in APO are protected by copyright, with all rights reserved, unless otherwise indicated.
|
DSpace Software Copyright © 2002-2010 Duraspace - Feedback |