Assessment of processing route on the performance of ceria-based composites
| dc.contributor.author | Nascimento, Rubens Maribondo do | |
| dc.contributor.author | Grilo, João Paulo de Freitas | |
| dc.contributor.author | Macedo, Daniel Araújo de | |
| dc.contributor.author | Marques, Fernando M. B. | |
| dc.date.accessioned | 2021-12-17T13:48:29Z | |
| dc.date.issued | 2021-02-02 | |
| dc.description.embargo | 2030-12 | |
| dc.description.resumo | Gd-doped ceria (GDC)-based composites, including a eutectic mixture of lithium and sodium carbonate (NLC) as second phase, were prepared using several processing routes, namely chemical synthesis, co-firing of both phases, or impregnation of a presintered porous matrix. LiAlO2-based composites were also prepared and used as reference. The structural, microstructural, and electrical properties (impedance spectroscopy in air, up to 700 C) of these materials were assessed in detail. A limited set of compositions was also used in measurements of total electrical conductivity at different oxygen partial pressures (from 0.21 to <10−25 atm), in the 600 C to 700 C range. The results obtained confirmed the enormous impact of the processing route on the percolation of the ceramic phase. In the exploited range of operating conditions, GDC-NLC composites prepared by infiltration of molten carbonates within a mechanically robust ceramic matrix exhibit a high total ionic conductivity strongly influenced by the contribution of the molten salt while the ceramic phase is decisive in the appearance of a significant component of electronic conductivity under reducing conditions | pt_BR |
| dc.identifier.citation | GRILO, João P. F.; MACEDO, Daniel A.; NASCIMENTO, Rubens M.; MARQUES, Fernando M. B. Assessment of processing route on the performance of ceria‐based composites. International Journal of Energy Research, [S.L.], v. 45, n. 6, p. 9069-9082, 2 fev. 2021. Wiley. http://dx.doi.org/10.1002/er.6438. Disponível em: https://onlinelibrary.wiley.com/doi/10.1002/er.6438. Acesso em: 21 mar. 2021. | pt_BR |
| dc.identifier.doi | 10.1002/er.6438 | |
| dc.identifier.issn | 0363-907X | |
| dc.identifier.issn | 1099-114X | |
| dc.identifier.uri | https://repositorio.ufrn.br/handle/123456789/45449 | |
| dc.language | en | pt_BR |
| dc.publisher | Wiley Online Library | pt_BR |
| dc.rights | Attribution-NonCommercial-NoDerivs 3.0 Brazil | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/br/ | * |
| dc.subject | Alkali metal carbonates | pt_BR |
| dc.subject | Ceria | pt_BR |
| dc.subject | Composites | pt_BR |
| dc.subject | Electronic conductivity | pt_BR |
| dc.subject | Percolation | pt_BR |
| dc.title | Assessment of processing route on the performance of ceria-based composites | pt_BR |
| dc.type | article | pt_BR |
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