Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis

The 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 betwe...

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Principais autores:	Nascimento, Rubens Maribondo do, Macedo, Daniel Araújo de, Figueiredo, Filipe Miguel Lebre, Patrício, Sónia Gonçalves, Martinelli, Antonio Eduardo, Paskocimas, Carlos Alberto, Marques, Fernando Manuel Bico
Formato:	article
Idioma:	English
Publicado em:	IOP Publishing
Assuntos:	propriedades elétricas condutividade elétrica microscopia eletrônica de varredura
Endereço do item:	https://repositorio.ufrn.br/handle/123456789/45734 http://dx.doi.org/10.1149/05022.0021ecst
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spelling	ri-123456789-457342022-10-19T19:43:37Z Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis Nascimento, Rubens Maribondo do Macedo, Daniel Araújo de Figueiredo, Filipe Miguel Lebre Patrício, Sónia Gonçalves Martinelli, Antonio Eduardo Paskocimas, Carlos Alberto Marques, Fernando Manuel Bico propriedades elétricas condutividade elétrica microscopia eletrônica de varredura The 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). The 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). 2022-01-31T14:09:51Z 2022-01-31T14:09:51Z 2013-04-01 article MACEDO, 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: 1938-5862 Electronic: 1938-6737 https://repositorio.ufrn.br/handle/123456789/45734 http://dx.doi.org/10.1149/05022.0021ecst en IOP Publishing
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	propriedades elétricas condutividade elétrica microscopia eletrônica de varredura
spellingShingle	propriedades elétricas condutividade elétrica microscopia eletrônica de varredura Nascimento, Rubens Maribondo do Macedo, Daniel Araújo de Figueiredo, Filipe Miguel Lebre Patrício, Sónia Gonçalves Martinelli, Antonio Eduardo Paskocimas, Carlos Alberto Marques, Fernando Manuel Bico Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis
description	The 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).
format	article
author	Nascimento, Rubens Maribondo do Macedo, Daniel Araújo de Figueiredo, Filipe Miguel Lebre Patrício, Sónia Gonçalves Martinelli, Antonio Eduardo Paskocimas, Carlos Alberto Marques, Fernando Manuel Bico
author_facet	Nascimento, Rubens Maribondo do Macedo, Daniel Araújo de Figueiredo, Filipe Miguel Lebre Patrício, Sónia Gonçalves Martinelli, Antonio Eduardo Paskocimas, Carlos Alberto Marques, Fernando Manuel Bico
author_sort	Nascimento, Rubens Maribondo do
title	Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis
title_short	Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis
title_full	Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis
title_fullStr	Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis
title_full_unstemmed	Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis
title_sort	electrical conductivity and microstructure of nio-cgo composites prepared by one-step synthesis
publisher	IOP Publishing
publishDate	2022
url	https://repositorio.ufrn.br/handle/123456789/45734 http://dx.doi.org/10.1149/05022.0021ecst
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_version_	1773960846092795904

Electrical conductivity and microstructure of NiO-CGO composites prepared by one-step synthesis

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