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Magnesium reduction of WO3 in a self-propagating high-temperature synthesis (SHS) process

Published online by Cambridge University Press:  03 March 2011

Seog Gueon Ko ,
Chang Whan Won ,
Byong Sun Chun  and
H.Y. Sohn
Seog Gueon Ko
Affiliation:
Engineering Research Center for Rapidly Solidified Materials, Chungnam National University, Daejeon 305-764, Korea
Chang Whan Won
Affiliation:
Engineering Research Center for Rapidly Solidified Materials, Chungnam National University, Daejeon 305-764, Korea
Byong Sun Chun
Affiliation:
Engineering Research Center for Rapidly Solidified Materials, Chungnam National University, Daejeon 305-764, Korea
H.Y. Sohn
Affiliation:
Department of Metallurgical Engineering, University of Utah, Salt Lake City, Utah 841112-1183
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Abstract

High-purity tungsten was prepared by the self-propagating high-temperature synthesis (SHS) process from a mixture of WO3 and Mg. The MgO in the product was leached with an HCl solution. The complete reduction of WO3 required a 33% excess of magnesium over the stoichiometric molar ratio Mg/WO3 of 3. The product tungsten had a purity of 99.980% which was higher than that of the reactant WO3. This is because the impurities were either volatilized at the high temperatures generated during the rapid exothermic reaction or dissolved into the HCl solution during leaching.

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Type
Communication
Information
Journal of Materials Research , Volume 10 , Issue 4 , April 1995 , pp. 795 - 797
Copyright
Copyright © Materials Research Society 1995

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References

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