Oxygen Content and Thermodynamic Stability of YBaCo2O6−δ Double Perovskite
The thermodynamic stability of the double perovskite YBaCo2O6−δ was studied using the coulometric titration technique and verified by measurements of the overall conductivity depending on oxygen partial pressure at a given temperature. As a result, the stability diagram of YBaCo2O6−δ was plotted. YB...
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| Format: | Article |
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Wiley
2018-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/1205708 |
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| author | Anton L. Sednev Andrey Yu Zuev Dmitry S. Tsvetkov |
| author_facet | Anton L. Sednev Andrey Yu Zuev Dmitry S. Tsvetkov |
| author_sort | Anton L. Sednev |
| collection | DOAJ |
| description | The thermodynamic stability of the double perovskite YBaCo2O6−δ was studied using the coulometric titration technique and verified by measurements of the overall conductivity depending on oxygen partial pressure at a given temperature. As a result, the stability diagram of YBaCo2O6−δ was plotted. YBaCo2O6−δ was found to be thermodynamically stable in air at 850°C and higher temperatures, whereas its thermodynamic stability at 900°C is limited by the range of oxygen partial pressures −3.56 ≤ log(pO2/atm) ≤ −0.14. Oxygen content in YBaCo2O6−δ slightly decreases at 900°C from 5.035 at log(pO2/atm) = −0.14 to 4.989 in the atmosphere with log(pO2/atm) = −3.565 indicating a crucial role which variation of Co+3/Co+2 ratio plays in its stability. YBaCo2O6−δ decomposes into the mixture of YCoO3 and BaCoO3−z at the high pO2 stability limit, whereas YBaCo4O7, BaCo1−xYxO3−γ, and Y2O3 were identified as the products of its decomposition at the low pO2 one. |
| format | Article |
| id | doaj-art-8e9b8b0534c6426abc23daffd2bd6df9 |
| institution | OA Journals |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-8e9b8b0534c6426abc23daffd2bd6df92025-08-20T02:09:22ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/12057081205708Oxygen Content and Thermodynamic Stability of YBaCo2O6−δ Double PerovskiteAnton L. Sednev0Andrey Yu Zuev1Dmitry S. Tsvetkov2Institute of Natural Sciences and Mathematics, Ural Federal University, Yekaterinburg 620000, RussiaInstitute of Natural Sciences and Mathematics, Ural Federal University, Yekaterinburg 620000, RussiaInstitute of Natural Sciences and Mathematics, Ural Federal University, Yekaterinburg 620000, RussiaThe thermodynamic stability of the double perovskite YBaCo2O6−δ was studied using the coulometric titration technique and verified by measurements of the overall conductivity depending on oxygen partial pressure at a given temperature. As a result, the stability diagram of YBaCo2O6−δ was plotted. YBaCo2O6−δ was found to be thermodynamically stable in air at 850°C and higher temperatures, whereas its thermodynamic stability at 900°C is limited by the range of oxygen partial pressures −3.56 ≤ log(pO2/atm) ≤ −0.14. Oxygen content in YBaCo2O6−δ slightly decreases at 900°C from 5.035 at log(pO2/atm) = −0.14 to 4.989 in the atmosphere with log(pO2/atm) = −3.565 indicating a crucial role which variation of Co+3/Co+2 ratio plays in its stability. YBaCo2O6−δ decomposes into the mixture of YCoO3 and BaCoO3−z at the high pO2 stability limit, whereas YBaCo4O7, BaCo1−xYxO3−γ, and Y2O3 were identified as the products of its decomposition at the low pO2 one.http://dx.doi.org/10.1155/2018/1205708 |
| spellingShingle | Anton L. Sednev Andrey Yu Zuev Dmitry S. Tsvetkov Oxygen Content and Thermodynamic Stability of YBaCo2O6−δ Double Perovskite Advances in Materials Science and Engineering |
| title | Oxygen Content and Thermodynamic Stability of YBaCo2O6−δ Double Perovskite |
| title_full | Oxygen Content and Thermodynamic Stability of YBaCo2O6−δ Double Perovskite |
| title_fullStr | Oxygen Content and Thermodynamic Stability of YBaCo2O6−δ Double Perovskite |
| title_full_unstemmed | Oxygen Content and Thermodynamic Stability of YBaCo2O6−δ Double Perovskite |
| title_short | Oxygen Content and Thermodynamic Stability of YBaCo2O6−δ Double Perovskite |
| title_sort | oxygen content and thermodynamic stability of ybaco2o6 δ double perovskite |
| url | http://dx.doi.org/10.1155/2018/1205708 |
| work_keys_str_mv | AT antonlsednev oxygencontentandthermodynamicstabilityofybaco2o6ddoubleperovskite AT andreyyuzuev oxygencontentandthermodynamicstabilityofybaco2o6ddoubleperovskite AT dmitrystsvetkov oxygencontentandthermodynamicstabilityofybaco2o6ddoubleperovskite |