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Journal of Materials Science
Erschienen in: Journal of Materials Science 18/2014

01.09.2014

Phase assembly and electrical conductivity of spark plasma sintered CeO2–ZrO2 ceramics

verfasst von: Rosalía Poyato, Sylvia A. Cruz, Francisco L. Cumbrera, Berta Moreno, Eva Chinarro, José A. Odriozola

Erschienen in: Journal of Materials Science | Ausgabe 18/2014

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Abstract

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.
Vorheriger Artikel Synthesis and characterization of paclitaxel-imprinted nanoparticles for recognition and controlled release of an anticancer drug
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Metadaten
Titel
Phase assembly and electrical conductivity of spark plasma sintered CeO2–ZrO2 ceramics
verfasst von
Rosalía Poyato
Sylvia A. Cruz
Francisco L. Cumbrera
Berta Moreno
Eva Chinarro
José A. Odriozola
Publikationsdatum
01.09.2014
Verlag
Springer US
Erschienen in
Journal of Materials Science / Ausgabe 18/2014
Print ISSN: 0022-2461
Elektronische ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-014-8361-6

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