DEMAT - Departamento de Engenharia de Materiais
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Article NiO-CGO Composite for SOFC Anode: Synthesis and Characterization(Journal of Materials Science and Engineering, 2010) Cela, Beatriz; Macedo, Daniel Araújo de; Souza, Graziele Lopes de; Miranda, Auristela Carla de; Martinelli, Antonio Eduardo; Nascimento, Rubens Maribondo do; Paskocimas, Carlos AlbertoArticle One-step synthesis of composite electrolytes of Eu-doped ceria and alkali metal carbonates(Elsevier, 2013-12-13) Nascimento, Rubens Maribondo do; Rajesh, Surendran; Macedo, Daniel Araújo de; Souza, Graziele Lopes de; Figueiredo, Filipe Miguel Henriques Lebre Ramos; Marques, Fernando M. B.Article Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis(IOP Publishing, 2013-04-01) Nascimento, Rubens Maribondo do; Macedo, Daniel Araújo de; Figueiredo, Filipe Miguel Lebre; Patrício, Sónia Gonçalves; Martinelli, Antonio Eduardo; Paskocimas, Carlos Alberto; Marques, Fernando Manuel BicoThe correlation between the microstructure and electrical properties of NiO-Ce0.9Gd0.1O1.95 (NiO-CGO) composites prepared by a one-step synthesis method is reported in the present work, and compared to conventional samples synthesized by mechanically mixing commercial powders. Samples sintered between 1350 and 1450 °C had their microstructures and electrical properties investigated by scanning electron microscopy (SEM) and impedance spectroscopy. The total electrical conductivity in the range of 100 – 500 °C of one-step composites is more than one order of magnitude higher than for conventional material. This result is associated to the presence of a network of well-connected and homogeneously distributed NiO grains shown by SEM for the one-step composite, which is responsible for its improved percolative behavior and lower activation energy (0.24 eV at 250 – 650 °C).Article Citrate–hydrothermal synthesis, structure and electrochemical performance of La0.6Sr0.4Co0.2Fe0.8O3−δ cathodes for IT-SOFCs(Elsevier, 2013) Garcia, Laurênia Martins Pereira; Macedo, Daniel Araújo de; Souza, Graziele L.; Motta, Fabiana Villela da; Paskocimas, Carlos Alberto; Nascimento, Rubens Maribondo doArticle Effect of composition on the structural development and electrical conductivity of NiO-GDC composites obtained by one-step synthesis(Elsevier, 2017-08) Nascimento, Rubens Maribondo do; Grilo, João Paulo de Freitas; Moura, Caroline Gomes; Macedo, Daniel Araújo de; Rajesh, Surendran; Figueiredo, Filipe M. L.; Marques, Fernando M. B.Article Electronic conductivity in Gd-doped ceria with salt additions(Elsevier, 2019-09) Nascimento, Rubens Maribondo do; Grilo, João Paulo de Freitas; Macedo, Daniel Araújo de; Marques, Fernando M. B.Article Innovative improvement of sintered ceramic electrolytes by salt infiltration(Elsevier, 2021-02-15) Nascimento, Rubens Maribondo do; Grilo, João Paulo de Freitas; Macedo, Daniel Araújo de; Marques, Fernando Manuel BicoArticle Microwave-assisted hydrothermal synthesis of ceria (CeO2): microstructure, sinterability and electrical properties(Elsevier, 2020-10) Nascimento, Rubens Maribondo Do; Carregosa, João Domingos Covello; Grilo, João Paulo de Freitas; Godoi, Glauber Silva; Macedo, Daniel Araújo de; Oliveira, Rosane Maria Pessoa BetânioArticle Performance of GDC with alkali metal carbonates as sintering aids(Elsevier, 2020-03) Nascimento, Rubens Maribondo do; Grilo, João Paulo de Freitas; Macedo, Daniel Araújo de; Marques, Fernando M. B.Article Electrical properties of Ca-doped ceria electrolytes prepared by proteic sol-gel route and by solid-state reaction using mollusk shells(Elsevier, 2021-05-13) Nascimento, Rubens Maribondo do; Garcia, Maxwell F. L.; Araújo, Allan Jedson Menezes de; Raimundo, Rafael Alexandre; Grilo, João Paulo de Freitas; Macedo, Daniel Araújo de