Designing experiments for the preparation of Ni- GDC cermets with controlled porosity as SOFC anode materials: effects on the electrical properties
| dc.contributor.author | Paskocimas, Carlos Alberto | |
| dc.contributor.author | Araújo, Allan Jedson Menezes de | |
| dc.contributor.author | Grilo, João Paulo de Freitas | |
| dc.contributor.author | Loureiro, Francisco J.A. | |
| dc.contributor.author | Campos, Liszandra Fernanda Araújo | |
| dc.contributor.author | Nascimento, Rubens Maribondo do | |
| dc.contributor.author | Macedo, Daniel Araújo de | |
| dc.date.accessioned | 2021-04-06T14:56:16Z | |
| dc.date.available | 2021-04-06T14:56:16Z | |
| dc.date.issued | 2018-12-15 | |
| dc.description.resumo | NiO-Ce0.9Gd0.1O1.95 (NiO-GDC) composites (30, 40 and 50 wt% NiO) were obtained by a “one-step” synthesis method. X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses were applied to the calcined compositions, revealing powders in the nanometer range. NiO-GDC composites were sintered at 1450-1550 °C and the respective Ni-GDC cermets were produced in a 10%H2-N2 atmosphere at 800 °C. A factorial design tool allowed to establish a regression equation that correlates the effects of Ni content and sintering temperature on the porosity of Ni-GDC cermets. Impedance spectroscopy was used to analyse the electrical properties of the solid oxide composites in air (at 500-650 °C) and of the Ni-GDC cermets in 10%H2-N2 (at 650 °C). The impedance analysis in reducing conditions revealed an improved in the electrical properties for the Ni-GDC cermet derived from the composite with 50 wt% NiO and sintered at 1450 °C. The electrical resistivity values are among the best ones reported for Ni-based cermets produced by different conditions | pt_BR |
| dc.identifier.citation | ARAÚJO, Allan J.M.; ALVES, Hugo P.A.; ANDRADE, Rivaildo M.; CAMPOS, Liszandra F.A.; MACEDO, Daniel A.; PINHO, André L.s.; NASCIMENTO, Rubens M.; PASKOCIMAS, Carlos A.. Designing experiments for the optimization of solid-state synthesis and characterization of alumina-based composites. Ceramics International, [S.L.], v. 45, n. 7, p. 8525-8532, maio 2019. Disponível em: https://www.sciencedirect.com/science/article/pii/S0272884219301907?via%3Dihub. Acesso em: 04 dez. 2020. http://dx.doi.org/10.1016/j.ceramint.2019.01.166. | pt_BR |
| dc.identifier.doi | 10.1016/j.ceramint.2018.09.115 | |
| dc.identifier.issn | 0272-8842 | |
| dc.identifier.uri | https://repositorio.ufrn.br/handle/123456789/32045 | |
| dc.language | en | pt_BR |
| dc.publisher | Elsevier | pt_BR |
| dc.subject | One-step synthesis | pt_BR |
| dc.subject | NiO/Ni-GDC | pt_BR |
| dc.subject | Factorial design | pt_BR |
| dc.subject | impedance spectroscopy | pt_BR |
| dc.subject | SOFC anode | pt_BR |
| dc.title | Designing experiments for the preparation of Ni- GDC cermets with controlled porosity as SOFC anode materials: effects on the electrical properties | pt_BR |
| dc.type | article | pt_BR |
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