Artículo
Phase assembly and electrical conductivity of spark plasma sintered CeO2–ZrO2 ceramics
Autor/es | Poyato Galán, Rosalía
Cruz Torres, Sylvia Andrea Cumbrera Hernández, Francisco Luis Moreno, Berta Chinarro Martín, Eva Odriozola Gordón, José Antonio |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica Universidad de Sevilla. Departamento de Física de la Materia Condensada |
Fecha de publicación | 2014 |
Fecha de depósito | 2018-04-25 |
Publicado en |
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Resumen | Ce x Zr1−x O2 (x = 0.10, 0.16 and 0.33) nanocrystalline powders were obtained by a two-step synthesis technique and sintered by spark plasma sintering (SPS). As consequence of the reduction of Ce4+ to Ce3+ species by carbon ... Ce x Zr1−x O2 (x = 0.10, 0.16 and 0.33) nanocrystalline powders were obtained by a two-step synthesis technique and sintered by spark plasma sintering (SPS). As consequence of the reduction of Ce4+ to Ce3+ species by carbon in the graphite environment in SPS, phase assemblies including tetragonal, monoclinic and pyrochlore phases were generated in the ceramics during the sintering process. The electrical conductivity was highly dependent on phase assembly and atmosphere (N2, H2 and O2). A significant decrease in the activation energy was noticed in the ceramics with high pyrochlore content when measuring the conductivity in H2 atmosphere, consequence of the strong reduction promoted in these ceramics during the measurement. Equal conduction behavior with similar activation energy was observed in all the ceramics when measuring in O2 atmosphere |
Identificador del proyecto | TEP-1048
ENE2009-14522-C05-01 ENE2009-14522-C05-03 P09-TEP-5454 |
Cita | Poyato Galán, R., Cruz Torres, S.A., Cumbrera Hernández, F.L., Moreno, B., Chinarro Martín, E. y Odriozola Gordón, J.A. (2014). Phase assembly and electrical conductivity of spark plasma sintered CeO2–ZrO2 ceramics. Journal of Material Science, 49 (18), 6353-6362. |
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