Study Morphologic and Microstructural of the System CeO₂-NiO Obtained by Polymeric Precursor Method

Abstract:

Cerium oxide has a high potential to be apply in removing pollutants combustion powders, organic materials from waste water and in the technology of fuel cells. Nickel oxide is an attractive material due to its excellent chemical stability, and their optical, electrical and magnetic proprieties. In this work, CeO₂-NiO systems on molar ratios of 1:1, 1:2 and 1:3 citric metal-acid were synthesized by using Pechinis method. The change in compositions and calcined temperature were studied by different techniques such as: XDR and SEM. It was also done a microstructural study by Rietvelds method, whose routine was designed to run in the Fullprof Suite program, and analyzed by pseudo-Voigt function. It has noticed that the molar ratio between metal-citric acid in the system CeO₂-NiO 1:1, 1:2 and 1:3 has a strong influence on microstructural proprieties, crystallite size and cell micro-deformations and can be used to control these proprieties.

• Periodical: Materials Science Forum (Volumes 727-728)
• Pages: 491-496
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.727-728.491
• Online since: August 2012
• Authors: A.C. Chaves, Hélio Lucena Lira, G.A. Neves, L.L.M. Sales, D.M.A. Melo, Bráulio Silva Barros
• Keywords: Micro-Deformations, Microstructural, Rietveld

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