Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1559482 | Calphad | 2006 | 12 Pages |
Abstract
The thermodynamics at the LaMnO3-yttria-stabilized zirconia (YSZ) interface, which is of particular importance for solid oxide fuel cell (SOFC) applications, is discussed in detail. Based on phase equilibrium calculations, we conclude that La2Zr2O7 forms at the LaMnO3-Y SZ interface due to its high chemical stability. Thermodynamically, the La2Zr2O7 formation cannot be prevented by increasing the La deficiency in La1±xMnO3±δ. Increasing the yttria content in YSZ can suppress and in the end prevent the La2Zr2O7 formation. Apart from the temperature and the oxygen partial pressure, other factors, like the phase assemblage at the interface, the La deficiency in La1±xMnO3±δ, the yttria content in YSZ and so on, also influence the amount of LaO1.5 or MnOx (from LaMnO3) dissolved in YSZ.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Ming Chen, A. Nicholas Grundy, Bengt Hallstedt, Ludwig J. Gauckler,