Quantitative Defect Chemistry Analysis and Electronic Conductivity Prediction of La0.8Sr0.2MnO3±δ Perovskite. Issue 9 (1st January 2015)

• Record Type: Journal Article
• Authors: Darvish, Shadi; Sabarou, Hooman; Saxena, Surendra K.; Zhong, Yu
• Is Part Of: Journal of the Electrochemical Society. Volume 162:Issue 9(2015)
• Page Start: E134
• Page End: E140
• Publication Date: 2015-01-01
• Subjects: CALPHAD -- defect chemistry -- electronic conductivity -- perovskite -- quantitative Brouwer diagram -- SOFC; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0361509jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : The defect chemistry of La0.8 Sr0.2 MnO3±δ (LSM-20) is analyzed using the La-Sr-Mn-O quaternary thermodynamic database with the compound energy formalism model by applying the CALPHAD approach. The quantitative Brouwer diagrams for LSM-20 at 1000, 1100, and 1200°C are developed. The detailed analysis of the Mn 3+ charge disproportionation behavior and the electronic conductivity in the temperature range of 1000–1200°C is carried out. The calculations on the electronic conductivity of LSM-20 show agreement with the experimental data in the literatures. In addition, the 3-D electronic conductivity contours are predicted in a wide range of oxygen partial pressure, temperature, and A-site deficiency.