Nanostructured cobalt oxides (Co{sub 3}O{sub 4} and CoO) and metallic Co powders synthesized by the solution combustion method

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2010.03.001· OSTI ID:22207311

Takimi, A. S.; Bergmann, C. P. ^[1]

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1. Department of Material Engineering, Federal University of Rio Grande do Sul, Av. Osvaldo Aranha 99, 705, Downtown, 90035190 Porto Alegre, RS (Brazil)

The combustion synthesis technique using glycine and urea as fuels and cobalt nitrate as an oxidizer is capable of producing well-crystallized Co{sub 3}O{sub 4}, CoO, as well as metallic Co powders. An interpretation based on the thermodynamic viewpoint and the measurement of the combustion temperatures during the reactions occurring for various fuel-to-oxidant ratios was proposed for a study of the nature of combustion and its correlation with the characteristics of as-synthesized powders. The largest measured specific surface area of the powders was 36 m{sup 2}/g at a 0.14 glycine-to-nitrate ratio. The crystallites were nano-sized ranging from approximately 23 to 90 nm.

• OSTI ID: 22207311
• Journal Information: Materials Research Bulletin, Vol. 45, Issue 6; Other Information: Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
77 NANOSCIENCE AND NANOTECHNOLOGY
COBALT NITRATES
COBALT OXIDES
COMBUSTION
GLYCINE
NANOSTRUCTURES
POWDERS
SPECIFIC SURFACE AREA
SYNTHESIS
THERMODYNAMIC PROPERTIES
X-RAY DIFFRACTION