Quantitative Defect Chemistry Analysis and Electronic Conductivity Prediction of La0.8Sr0.2MnO3±δ Perovskite

被引：18

作者：

Darvish, Shadi ^{[1
,2
]}

Sabarou, Hooman ^{[1
,2
]}

Saxena, Surendra K. ^{[1
,2
]}

Zhong, Yu ^{[1
,2
]}

机构：

[1] Florida Int Univ, Dept Mech & Mat Engn, Miami, FL 33174 USA

[2] Florida Int Univ, Ctr Study Matter Extreme Condit CeSMEC, Miami, FL 33199 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2015年 / 162卷 / 09期

关键词：

CHEMICAL DIFFUSION-COEFFICIENT; OXIDATION-REDUCTION BEHAVIOR; SR-DOPED LAMNO3; ELECTRICAL-CONDUCTIVITY; NONSTOICHIOMETRY; OXIDES; EQUILIBRIA; PROTON; MODEL;

D O I：

10.1149/2.0361509jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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.

引用

页码：E134 / E140

页数：7

共 43 条

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