Journal article
Phase Formation in the System ZrO2–LaO1.5–MnOx in Air and PO2B1 Pa After 500 h of Annealing at 12001 and 14001 deg.C : Phase Formation in the System ZrO2-LaO1.5-MnOx
Electrochemistry, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
Electroceramics, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark4
Microstructures and Interfaces, Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark5
The phase relation in the ZrO2–LaO1.5–MnOx system has been experimentally determined at 1200° and 1400°C in air and at 1200°C in N2 (∼100 Pa). Tie lines between LaMnO3 and t-ZrO2 and between LaMnO3 and La2Zr2O7 are observed at 1200°C in air. The geometry of the phase diagram changes at 1400°C in air due to the appearance of a stabilized ZrO2 phase, found to be of cubic symmetry by backscattered electron diffraction.
Tie lines of LaMnO3–c-ZrO2, LaMnO3–La2Zr2O7, and c-ZrO2–La2Zr2O7 are observed. At 1200°C in N2 (∼100 Pa), the LaMnO3–t-ZrO2 tie line observed at 1200°C in air is replaced by the La2Zr2O7–MnO tie line. Stabilization of c-ZrO2 is observed and a new compound forms, which is being reported for the first time.
The proposed composition of the new compound is La2Zr5MnO14+δ.
| Language: | English |
|---|---|
| Year: | 2010 |
| Pages: | 2884-2890 |
| ISSN: | 00027820 and 15512916 |
| Types: | Journal article |
| DOI: | 10.1111/j.1551-2916.2010.03774.x |
| ORCIDs: | Chatzichristodoulou, Christodoulos , Chen, Ming and Bowen, Jacob R. |
