화학공학소재연구정보센터
Journal of the Electrochemical Society, Vol.162, No.9, E134-E140, 2015
Quantitative Defect Chemistry Analysis and Electronic Conductivity Prediction of La0.8Sr0.2MnO3 +/-delta Perovskite
The defect chemistry of La0.8Sr0.2MnO3 +/-delta (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 degrees C are developed. The detailed analysis of the Mn3+ charge disproportionation behavior and the electronic conductivity in the temperature range of 1000-1200 degrees 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. (C) 2015 The Electrochemical Society. All rights reserved.