Assessment of processing route on the performance of ceria-based composites

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...

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Principais autores:	Nascimento, Rubens Maribondo do, Grilo, João Paulo de Freitas, Macedo, Daniel Araújo de, Marques, Fernando M. B.
Formato:	article
Idioma:	English
Publicado em:	Wiley Online Library
Assuntos:	Alkali metal carbonates Ceria Composites Electronic conductivity Percolation
Endereço do item:	https://repositorio.ufrn.br/handle/123456789/45449
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id	ri-123456789-45449
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spelling	ri-123456789-454492024-03-19T04:02:59Z Assessment of processing route on the performance of ceria-based composites Nascimento, Rubens Maribondo do Grilo, João Paulo de Freitas Macedo, Daniel Araújo de Marques, Fernando M. B. Alkali metal carbonates Ceria Composites Electronic conductivity Percolation 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 2030-12 2021-12-17T13:48:29Z 2021-02-02 article 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. 0363-907X 1099-114X https://repositorio.ufrn.br/handle/123456789/45449 10.1002/er.6438 en Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ Wiley Online Library
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Alkali metal carbonates Ceria Composites Electronic conductivity Percolation
spellingShingle	Alkali metal carbonates Ceria Composites Electronic conductivity Percolation Nascimento, Rubens Maribondo do Grilo, João Paulo de Freitas Macedo, Daniel Araújo de Marques, Fernando M. B. Assessment of processing route on the performance of ceria-based composites
description	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
format	article
author	Nascimento, Rubens Maribondo do Grilo, João Paulo de Freitas Macedo, Daniel Araújo de Marques, Fernando M. B.
author_facet	Nascimento, Rubens Maribondo do Grilo, João Paulo de Freitas Macedo, Daniel Araújo de Marques, Fernando M. B.
author_sort	Nascimento, Rubens Maribondo do
title	Assessment of processing route on the performance of ceria-based composites
title_short	Assessment of processing route on the performance of ceria-based composites
title_full	Assessment of processing route on the performance of ceria-based composites
title_fullStr	Assessment of processing route on the performance of ceria-based composites
title_full_unstemmed	Assessment of processing route on the performance of ceria-based composites
title_sort	assessment of processing route on the performance of ceria-based composites
publisher	Wiley Online Library
publishDate	2021
url	https://repositorio.ufrn.br/handle/123456789/45449
work_keys_str_mv	AT nascimentorubensmaribondodo assessmentofprocessingrouteontheperformanceofceriabasedcomposites AT grilojoaopaulodefreitas assessmentofprocessingrouteontheperformanceofceriabasedcomposites AT macedodanielaraujode assessmentofprocessingrouteontheperformanceofceriabasedcomposites AT marquesfernandomb assessmentofprocessingrouteontheperformanceofceriabasedcomposites
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Assessment of processing route on the performance of ceria-based composites

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