This title appears in the Scientific Report :
2006
Please use the identifier:
http://dx.doi.org/10.1016/j.ssi.2006.07.041 in citations.
Synthesis and investigations on the stability of La0.8Sr0.2CuO3-δ at high temperatures
Synthesis and investigations on the stability of La0.8Sr0.2CuO3-δ at high temperatures
For application in solid oxide fuel cells La0.8Sr0.2CuO2.4+delta was synthesized and the phase evolution-was characterized after quenching from different temperatures and after slow cooling. A single phase perovskite was found after quenching from 950 degrees C. The electrical conductivity of the La...
Saved in:
Personal Name(s): | Zahid, M. |
---|---|
Arul Raj, I. / Fischer, E. V. / Tietz, F. / Serra Alfaro, J. M. | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IWV-1 |
Published in: | Solid state ionics, 177 (2006) S. 3205 - 3210 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2006
|
Physical Description: |
3205 - 3210 |
DOI: |
10.1016/j.ssi.2006.07.041 |
Document Type: |
Journal Article |
Research Program: |
Solid Oxide Fuel Cell Rationelle Energieumwandlung |
Series Title: |
Solid State Ionics
177 |
Subject (ZB): | |
Publikationsportal JuSER |
For application in solid oxide fuel cells La0.8Sr0.2CuO2.4+delta was synthesized and the phase evolution-was characterized after quenching from different temperatures and after slow cooling. A single phase perovskite was found after quenching from 950 degrees C. The electrical conductivity of the La0.8Sr0.2CuO2.4+delta perovskite exhibited metallic behavior reaching values of about 270 S/cm at 800 degrees C in air. The thermal expansion between 30 and 800 degrees C gave a thermal expansion coefficient of 11.1 x 10(-6) K-1.At higher temperatures, the perovskite was transformed to the K2NiF4-type structure via an intermediate stage that can be best described as a LaSrCuO4 phase with preferential growing of {020} lattice planes. After sintering at 1100 degrees C and slow cooling in the furnace a phase mixture of (La,Sr)CuO4+delta and (La,Sr)CuO2.4+delta perovskite was obtained. This phase mixture showed higher electrical conductivity (400 S/cm at 800 degrees C) and smaller thermal expansion coefficient (9.6 x 10(-6) K-1) than the single phase La0.8Sr0.2CuO2.4+delta perovskite. (c) 2006 Elsevier B.V. All rights reserved. |