Phase Equilibria and Defect Chemistry of the La-Sr-Co-O System

Wei-Wei Zhang, Erwin Povoden-Karadeniz, Yijing Shang, Peter Vang Hendriksen, Ming Chen*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

6 Downloads (Pure)


Strontium doped lanthanum cobaltite (LSC, La1−xSrxCoO3−δ) is a promising oxygen electrode material for intermediate 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.
Original languageEnglish
JournalJournal of the European Ceramic Society
Issue number10
Pages (from-to)4419-4430
Number of pages12
Publication statusPublished - 2023


  • CALPHAD modelling
  • Perovskite
  • Oxygen electrode material
  • Solid oxide cell
  • LSC


Dive into the research topics of 'Phase Equilibria and Defect Chemistry of the La-Sr-Co-O System'. Together they form a unique fingerprint.

Cite this