Oxygen permeation through oxygen ion oxide-noble metal dual phase composites
| Autor: | Henny J.M. Bouwmeester, Chunnian Chen, Henk Verweij, Henk Kruidhof, Anthonie Burggraaf |
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| Přispěvatelé: | Faculty of Science and Technology, Inorganic Membranes, Inorganic Materials Science |
| Rok vydání: | 1996 |
| Předmět: |
Oxide
chemistry.chemical_element Oxygen permeation General Chemistry Permeation engineering.material Condensed Matter Physics Oxygen Bismuth Metal Oxygen permeability chemistry.chemical_compound chemistry visual_art Ion conductivity visual_art.visual_art_medium engineering Ionic conductivity General Materials Science Noble metal Dual phase composites Composite material |
| Zdroj: | Solid state ionics, 86-88(Part 1), 569-572. Elsevier |
| ISSN: | 0167-2738 |
| DOI: | 10.1016/0167-2738(96)00206-8 |
| Popis: | Oxygen permeation behaviour of three composites, yttria-stabilized zirconia-palladium, erbia-stabilized bismuth oxidenoble metal (silver, gold) was studied. Oxygen permeation measurements were performed under controlled oxygen pressure gradients at elevated temperatures. Air was supplied at one side of a dense sintered disk specimen, while helium was fed at the opposite side to sweep away the permeated oxygen. This research has demonstrated that in addition to the presence of percolative metal phase in the oxide matrix, a large ionic conductivity of the oxide phase and a high catalytic activity of the metal phase towards surface oxygen exchange are required for the dual phase composite to possess high oxygen permeability. The bismuth oxide-silver composite fulfils these requirements, hence showing the best oxygen permeability. |
| Databáze: | OpenAIRE |
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