This title appears in the Scientific Report :
2007
Please use the identifier:
http://dx.doi.org/10.1016/j.progsolidstchem.2007.01.028 in citations.
Survey of the quasi-ternary system La0.8Sr0.2MnO3 - La0.8Sr0.2CoO3 - La0.8Sr0.2FeO3
Survey of the quasi-ternary system La0.8Sr0.2MnO3 - La0.8Sr0.2CoO3 - La0.8Sr0.2FeO3
An overview on the variation of the thermal expansion, the electrical conductivity as well as nonstoichiometry of the oxide content as a function of composition within the quasi-ternary system La0.8Sr0.2MnO3-delta-La0.8Sr0.2CoO3-delta-La0.8Sr0.2FeO3-delta in air is presented. The various powders wer...
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Personal Name(s): | Tietz, F. |
---|---|
Arul Raj, I. / Zahid, M. / Mai, A. / Stöver, D. | |
Contributing Institute: |
Werkstoffsynthese und Herstellungsverfahren; IEF-1 JARA-ENERGY; JARA-ENERGY |
Published in: | Progress in solid state chemistry, 35 (2007) S. 539 - 543 |
Imprint: |
Oxford [u.a.]
Pergamon Press
2007
|
Physical Description: |
539 - 543 |
DOI: |
10.1016/j.progsolidstchem.2007.01.028 |
Document Type: |
Journal Article |
Research Program: |
Solid Oxide Fuel Cell Rationelle Energieumwandlung |
Series Title: |
Progress in Solid State Chemistry
35 |
Subject (ZB): | |
Publikationsportal JuSER |
An overview on the variation of the thermal expansion, the electrical conductivity as well as nonstoichiometry of the oxide content as a function of composition within the quasi-ternary system La0.8Sr0.2MnO3-delta-La0.8Sr0.2CoO3-delta-La0.8Sr0.2FeO3-delta in air is presented. The various powders were synthesized under identical conditions. The DC electrical conductivity values of the compositions at 800 degrees C in air vary in a wide range from 15 to 1338 S cm(-1). The magnitude of electrical conductivity of the perovskites is mainly determined by the percentage of cobalt in the compositions. A similar behaviour was observed for the measured thermal expansion coefficients between room temperature and 1000 degrees C in air, increasing from 10.9 to 19.4 x 10(-6) K-1 as a function of cobalt content. Changes in the oxygen stoichiometry of the materials were characterized by temperature-programmed oxidation measurements. (c) 2007 Elsevier Ltd. All rights reserved. |