Nano Archive

Combustion synthesis of nano-sized tungsten carbide powder and effects of sodium halides

Won, H. I. and Nersisyan, H. H. and Won, C. W. (2010) Combustion synthesis of nano-sized tungsten carbide powder and effects of sodium halides. Journal of Nanoparticle Research, 12 (2). pp. 493-500.

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Abstract

The synthesis of nano-size tungsten carbide powder has been investigated with a WO3 + Mg + C + carbonate system using alkali halides. The effects of different types of alkali halides on combustion temperature and tungsten carbide formation were discussed. Sodium fluoride had a notable effect on the particle size of the product and the degree of transformation from the initial mixture. A small amount of ammonium carbonate activated the carburization of tungsten carbide by the gas phase carbon transportation. X-ray diffraction data and particle analysis showed that the final product synthesized from a WO3–Mg–C–(NH4)2CO3–NaF system contains pure-phase tungsten carbide with a particle size of 50–100 nm.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:8202
Deposited By:JNCASR
Deposited On:10 Feb 2010 10:02
Last Modified:10 Feb 2010 10:02

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