Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5439282 | Ceramics International | 2016 | 7 Pages |
Abstract
This work deals with the synthesis, processing and characterization of NiO/Ni-CGO composite materials as potential solid oxide fuel cell (SOFC) anodes. The particulate materials were obtained by a one-step synthesis method and characterized by thermal analysis (prior to calcination) and X-ray diffraction (calcined powder). The ceramic processing of samples containing from 30 to 70 wt% NiO was carried out by factorial design. Besides the NiO content controlled during the chemical synthesis, the impacts of the pore-former content (citric acid, used in proportions of 0, 7.5 and 15 wt%) and the sintering temperature (1300, 1350 and 1400 °C) were also investigated. The open porosity of NiO-CGO composites and reduced Ni-CGO cermets was modeled as a function of factors (NiO content, citric acid content and sintering temperature) and interaction of factors. The electrical conductivity of a selected NiO-CGO composite was compared to that of a gadolinia doped ceria electrolyte.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Allan J.M. Araujo, Angel R.O. Sousa, João P.F. Grilo, Liszandra F.A. Campos, Francisco J.A. Loureiro, Duncan P. Fagg, Ricardo P.S. Dutra, Daniel A. Macedo,