4.7 Article

Phase equilibria and defect chemistry of the La-Sr-Co-O system

Journal

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 43, Issue 10, Pages 4419-4430

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2023.03.026

Keywords

CALPHAD modeling; Perovskite; Oxygen electrode material; Solid oxide cell; LSC

Ask authors/readers for more resources

This study aims to identify the phase stability of LSC by thermodynamic modeling and experimental validation. The calculated results show good agreement with experimental data. Furthermore, other properties of the LSC perovskite are predicted based on the developed database. These calculations provide guidance for designing LSC-based materials for various applications.
Strontium doped lanthanum cobaltite (LSC, La1_xSrxCoO3_delta) is a promising oxygen electrode material for in-termediate temperature solid oxide cells (SOCs) and oxygen membranes. Its application in service is however impeded by its thermodynamic instability. The present work is aiming to identify the phase stability of LSC by thermodynamic modeling of the La-Sr-Co-O system using the CALculation of PHAse Diagrams (CALPHAD) method coupled with experiments. The calculated results based on the developed database are validated using experimental data both from literature and the present work. General agreement is achieved between model predictions and experimental results. Other properties of the LSC perovskite, such as oxygen non-stoichiometry and cation distribution, are also calculated and predicted based on the developed La-Sr-Co-O database. These calculations can provide important guidance in designing LSC-based materials for various applications and the established thermodynamic functions can serve as input for further thermodynamic calculations on altered and even more complex perovskites.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available