Nascimento, Rubens Maribondo doMacedo, Daniel Araújo deFigueiredo, Filipe Miguel LebrePatrício, Sónia GonçalvesMartinelli, Antonio EduardoPaskocimas, Carlos AlbertoMarques, Fernando Manuel Bico2022-01-312022-01-312013-04-01MACEDO, Daniel Araújo de; FIGUEIREDO, Filipe Miguel Lebre; PATRICIO, Sónia Gonçalves; NASCIMENTO, Rubens Maribondo do; MARTINELLI, Antonio Eduardo; PASKOCIMAS, Carlos Alberto; MARQUES, Fernando Manuel Bico. Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis. Ecs Transactions, [S.L.], v. 50, n. 22, p. 21-31, 1 abr. 2013. The Electrochemical Society. http://dx.doi.org/10.1149/05022.0021ecst. Disponível em: https://iopscience.iop.org/article/10.1149/05022.0021ecst. Acesso em: 08 abr. 2021.Print: 1938-5862Electronic: 1938-6737https://repositorio.ufrn.br/handle/123456789/45734The 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).propriedades elétricascondutividade elétricamicroscopia eletrônica de varreduraarticlehttp://dx.doi.org/10.1149/05022.0021ecst