Electrical and microstructural properties of Yb-doped CeO2
Nanopowdered Ce1−xYbxO2−δ solid solutions (0 ≤ x ≤ 0.2) were synthesized by a self-propagating room temperature synthesis. XRD and SEM were used to study the properties of these materials as well as the Yb solubility in CeO2 lattice. Results showed that all the obtained powders were solid solutions...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2014-06-01
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| Series: | Journal of Asian Ceramic Societies |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2187076414000177 |
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| author | B. Matović M. Stojmenović J. Pantić A. Varela M. Žunić N. Jiraborvornpongsa T. Yano |
| author_facet | B. Matović M. Stojmenović J. Pantić A. Varela M. Žunić N. Jiraborvornpongsa T. Yano |
| author_sort | B. Matović |
| collection | DOAJ |
| description | Nanopowdered Ce1−xYbxO2−δ solid solutions (0 ≤ x ≤ 0.2) were synthesized by a self-propagating room temperature synthesis. XRD and SEM were used to study the properties of these materials as well as the Yb solubility in CeO2 lattice. Results showed that all the obtained powders were solid solutions with a fluorite-type crystal structure and with nanometric particle size. The average size of Ce1−xYbxO2−δ particles was approximately 3 nm. Electrochemical impedance spectroscopy for the sintered pellets depicted that it was possible to separate Rbulk and Rgb in the temperature interval of 550–800 °C. The activation energy for the bulk conduction was 1.03 eV and for grain boundary conduction was 1.14 eV. Grain boundary resistivity dominates over the other resistivities. These measurements confirmed that Yb3+-doped CeO2 material had a potential as electrolyte for intermediate-temperature solid oxide fuel cell applications. |
| first_indexed | 2024-12-22T06:43:36Z |
| format | Article |
| id | doaj.art-64c75e14bd8b4c43acd8766d068746cb |
| institution | Directory Open Access Journal |
| issn | 2187-0764 |
| language | English |
| last_indexed | 2024-12-22T06:43:36Z |
| publishDate | 2014-06-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Asian Ceramic Societies |
| spelling | doaj.art-64c75e14bd8b4c43acd8766d068746cb2022-12-21T18:35:22ZengTaylor & Francis GroupJournal of Asian Ceramic Societies2187-07642014-06-012211712210.1016/j.jascer.2014.01.008Electrical and microstructural properties of Yb-doped CeO2B. Matović0M. Stojmenović1J. Pantić2A. Varela3M. Žunić4N. Jiraborvornpongsa5T. Yano6Institute of Nuclear Sciences “Vinća”, Materials Science Laboratory, University Belgrade, SerbiaInstitute of Nuclear Sciences “Vinća”, Materials Science Laboratory, University Belgrade, SerbiaInstitute of Nuclear Sciences “Vinća”, Materials Science Laboratory, University Belgrade, SerbiaInstituto de Quimica, Universidade Estadual Paulista Júlio de Mesquita Filho, Rua Prof. Francisco Degni, 55, CEP 14800-900 Araraquara, Sao Paolo, BrazilInstituto de Quimica, Universidade Estadual Paulista Júlio de Mesquita Filho, Rua Prof. Francisco Degni, 55, CEP 14800-900 Araraquara, Sao Paolo, BrazilTokyo Institute of Technology, Research Laboratory for Nuclear Reactors, 2-12-1, Ookayama, Meguro-ku, Tokyo, JapanTokyo Institute of Technology, Research Laboratory for Nuclear Reactors, 2-12-1, Ookayama, Meguro-ku, Tokyo, JapanNanopowdered Ce1−xYbxO2−δ solid solutions (0 ≤ x ≤ 0.2) were synthesized by a self-propagating room temperature synthesis. XRD and SEM were used to study the properties of these materials as well as the Yb solubility in CeO2 lattice. Results showed that all the obtained powders were solid solutions with a fluorite-type crystal structure and with nanometric particle size. The average size of Ce1−xYbxO2−δ particles was approximately 3 nm. Electrochemical impedance spectroscopy for the sintered pellets depicted that it was possible to separate Rbulk and Rgb in the temperature interval of 550–800 °C. The activation energy for the bulk conduction was 1.03 eV and for grain boundary conduction was 1.14 eV. Grain boundary resistivity dominates over the other resistivities. These measurements confirmed that Yb3+-doped CeO2 material had a potential as electrolyte for intermediate-temperature solid oxide fuel cell applications.http://www.sciencedirect.com/science/article/pii/S2187076414000177Solid solutionCerium oxide (CeO2)X-ray diffractionElectrochemical characterizationSintering |
| spellingShingle | B. Matović M. Stojmenović J. Pantić A. Varela M. Žunić N. Jiraborvornpongsa T. Yano Electrical and microstructural properties of Yb-doped CeO2 Journal of Asian Ceramic Societies Solid solution Cerium oxide (CeO2) X-ray diffraction Electrochemical characterization Sintering |
| title | Electrical and microstructural properties of Yb-doped CeO2 |
| title_full | Electrical and microstructural properties of Yb-doped CeO2 |
| title_fullStr | Electrical and microstructural properties of Yb-doped CeO2 |
| title_full_unstemmed | Electrical and microstructural properties of Yb-doped CeO2 |
| title_short | Electrical and microstructural properties of Yb-doped CeO2 |
| title_sort | electrical and microstructural properties of yb doped ceo2 |
| topic | Solid solution Cerium oxide (CeO2) X-ray diffraction Electrochemical characterization Sintering |
| url | http://www.sciencedirect.com/science/article/pii/S2187076414000177 |
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