Please use this identifier to cite or link to this item: https://repositorio.ufrn.br/handle/123456789/31603
Title: Influence of microwave-assisted hydrothermal treatment on the properties of nickel oxide–zirconia based composites
Authors: Martinelli, Antonio Eduardo
Pinheiro, L.B.
Tabuti, F.N.
Keywords: Ceramic composites;Ceramic composites;Microwave-assisted hydrothermal;Impedance spectroscopy
Issue Date: May-2016
Publisher: Elsevier
Citation: PINHEIRO, L.B.; TABUTI, F.N.; MARTINELLI, A.e.; FONSECA, F.C.. Influence of microwave-assisted hydrothermal treatment on the properties of nickel oxide–zirconia based composites. Ceramics International, [S.L.], v. 42, n. 7, p. 9058-9064, maio 2016. Elsevier BV. http://dx.doi.org/10.1016/j.ceramint.2016.02.165. Disponível em: https://www.sciencedirect.com/science/article/pii/S0272884216301067?via%3Dihub. Acesso em: 20 jan. 2021.
Portuguese Abstract: The influence of a microwave-assisted hydrothermal treatment (MWH) on the properties of NiO– ZrO2:8 mol%Y2O3–CeO2 composite was investigated. The composites were prepared by coprecipitation of nickel and cerium salts in a suspension of ZrO2:8 mol%Y2O3 (YSZ). Simultaneous thermogravimetric and differential thermal analysis revealed that the MWH promotes the crystallization of Ni(OH)2, as confirmed by X-ray diffraction. The sintering behavior of ceramic compacts was influenced by the MWH treatment, which contributed to slightly higher final apparent densities. Impedance spectroscopy measurements revealed that the electrical properties of sintered composites exhibit characteristics of mixedionic–electronic conductors, a feature that was suppressed in the samples that underwent MHW treatment. Such an effect evidences the influence of hydrothermal treatment on the final microstructure of the composite
URI: https://repositorio.ufrn.br/handle/123456789/31603
ISSN: 0272-8842
Appears in Collections:CT - DEMAT - Artigos publicados em periódicos

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