Obtaining molybdenum powder by metallothermy of its compounds in a sodium chloride melt

The reduction conditions of the oxygen compound of molybdenum to metal powder using aluminum and magnesium in a sodium chloride solution are investigated. A thermodynamic evaluation of the reduction reactions is given. It is found that, in order to end up with a 95–97% yield of the powders, an exces...

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Bibliographic Details
Published in:Russian journal of non-ferrous metals 2010-12, Vol.51 (6), p.490-493
Main Authors: Gostishchev, V. V., Ri, Khosen, Khimukhin, S. N., Ri, E. Kh, Komkov, V. G.
Format: Article
Language:English
Subjects:
Aluminum
Chemistry and Materials Science
Magnesium
Materials Science
Mathematical analysis
Melts
Metallic Materials
Molybdenum
Nonferrous metals
Powder Materials and Coatings
Reduction
Sodium chloride
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Summary:The reduction conditions of the oxygen compound of molybdenum to metal powder using aluminum and magnesium in a sodium chloride solution are investigated. A thermodynamic evaluation of the reduction reactions is given. It is found that, in order to end up with a 95–97% yield of the powders, an excess of ∼30% of the reducing agent with respect to the calculated one is necessary. In this case, the content of impurity elements does not exceed 3%. The influence of obtaining conditions on the granulometric characteristics of the powder is established. It is shown that powders with a larger specific surface (64.4 × 10 5 m −1 ) are formed with the use of aluminum in concentrated solutions of the starting compound in the NaCl melt.
ISSN:1067-8212
1934-970X
DOI:10.3103/S1067821210060106