Electrical Properties of a CeO2-Bi2O3 Mix System Elaborated at 600°C
The electrical conduction of a series of polycristalline [(1−x)CeO2⋅x/2Bi2O3] samples has been analyzed using electrical impedance spectroscopy, in the temperature range 25 to 750∘C. Samples have been prepared via a coprecipitation route followed by a pyrolysis process at 600∘C. For compositions x≤0...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2012/452383 |
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| author | Lamia Bourja Bahcine Bakiz Abdeljalil Benlhachemi Mohamed Ezahri Sylvie Villain Claude Favotto Jean-Raymond Gavarri |
| author_facet | Lamia Bourja Bahcine Bakiz Abdeljalil Benlhachemi Mohamed Ezahri Sylvie Villain Claude Favotto Jean-Raymond Gavarri |
| author_sort | Lamia Bourja |
| collection | DOAJ |
| description | The electrical conduction of a series of polycristalline [(1−x)CeO2⋅x/2Bi2O3] samples has been analyzed using electrical impedance spectroscopy, in the temperature range 25 to 750∘C. Samples have been prepared via a coprecipitation route followed by a pyrolysis process at 600∘C. For compositions x≤0.20, Ce1−xBixO2−x/2 solid solutions, with fluorite cubic structure, are obtained. In the composition range 0.30≤x≤1, the system is biphasic with coexistence of cubic and tetragonal structures. To interpret the Nyquist representations of electrical analyses, various impedance models including constant phase elements and Warburg impedances have been used. In the biphasic range (0.30≤x≤0.7), the conductivity variation might be related to the increasing fraction of two tetragonal β′ and β-Bi2O3 phases. The stabilization of the tetragonal phase coexisting with substituted ceria close to composition x=0.7 is associated with a high conduction of the mix system CeO2-Bi2O3. |
| format | Article |
| id | doaj-art-7b77c7a8deae4326a99d458d62776122 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-7b77c7a8deae4326a99d458d627761222025-02-03T01:33:14ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422012-01-01201210.1155/2012/452383452383Electrical Properties of a CeO2-Bi2O3 Mix System Elaborated at 600°CLamia Bourja0Bahcine Bakiz1Abdeljalil Benlhachemi2Mohamed Ezahri3Sylvie Villain4Claude Favotto5Jean-Raymond Gavarri6Institut Matériaux Microélectronique et Nanosciences de Provence, IM2NP, UMR CNRS 7334, Université du Sud Toulon-Var, BP 20132, 83957 La Garde Cedex, FranceInstitut Matériaux Microélectronique et Nanosciences de Provence, IM2NP, UMR CNRS 7334, Université du Sud Toulon-Var, BP 20132, 83957 La Garde Cedex, FranceLaboratoire Matériaux et Environnement LME, Faculté des Sciences, Université Ibn Zohr, BP 8106, Cité Dakhla, Agadir, MoroccoLaboratoire Matériaux et Environnement LME, Faculté des Sciences, Université Ibn Zohr, BP 8106, Cité Dakhla, Agadir, MoroccoInstitut Matériaux Microélectronique et Nanosciences de Provence, IM2NP, UMR CNRS 7334, Université du Sud Toulon-Var, BP 20132, 83957 La Garde Cedex, FranceInstitut Matériaux Microélectronique et Nanosciences de Provence, IM2NP, UMR CNRS 7334, Université du Sud Toulon-Var, BP 20132, 83957 La Garde Cedex, FranceInstitut Matériaux Microélectronique et Nanosciences de Provence, IM2NP, UMR CNRS 7334, Université du Sud Toulon-Var, BP 20132, 83957 La Garde Cedex, FranceThe electrical conduction of a series of polycristalline [(1−x)CeO2⋅x/2Bi2O3] samples has been analyzed using electrical impedance spectroscopy, in the temperature range 25 to 750∘C. Samples have been prepared via a coprecipitation route followed by a pyrolysis process at 600∘C. For compositions x≤0.20, Ce1−xBixO2−x/2 solid solutions, with fluorite cubic structure, are obtained. In the composition range 0.30≤x≤1, the system is biphasic with coexistence of cubic and tetragonal structures. To interpret the Nyquist representations of electrical analyses, various impedance models including constant phase elements and Warburg impedances have been used. In the biphasic range (0.30≤x≤0.7), the conductivity variation might be related to the increasing fraction of two tetragonal β′ and β-Bi2O3 phases. The stabilization of the tetragonal phase coexisting with substituted ceria close to composition x=0.7 is associated with a high conduction of the mix system CeO2-Bi2O3.http://dx.doi.org/10.1155/2012/452383 |
| spellingShingle | Lamia Bourja Bahcine Bakiz Abdeljalil Benlhachemi Mohamed Ezahri Sylvie Villain Claude Favotto Jean-Raymond Gavarri Electrical Properties of a CeO2-Bi2O3 Mix System Elaborated at 600°C Advances in Materials Science and Engineering |
| title | Electrical Properties of a CeO2-Bi2O3 Mix System Elaborated at 600°C |
| title_full | Electrical Properties of a CeO2-Bi2O3 Mix System Elaborated at 600°C |
| title_fullStr | Electrical Properties of a CeO2-Bi2O3 Mix System Elaborated at 600°C |
| title_full_unstemmed | Electrical Properties of a CeO2-Bi2O3 Mix System Elaborated at 600°C |
| title_short | Electrical Properties of a CeO2-Bi2O3 Mix System Elaborated at 600°C |
| title_sort | electrical properties of a ceo2 bi2o3 mix system elaborated at 600°c |
| url | http://dx.doi.org/10.1155/2012/452383 |
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