Influence of the composition of precursors and reduction conditions on the properties of magnesiothermic molybdenum powders

Influence of the composition of precursors and reduction conditions on the properties of magnesiothermic molybdenum powders

We have investigated the preparation of molybdenum powders by reducing the oxide compounds MoO 3 , MgMoO 4 , and CaMoO 4 with magnesium vapor at residual argon pressures in the range 5–20 kPa and temperatures in the range 700–800°C. Using the MgMoO 4 and CaMoO 4 compounds as precursors, we have obta...

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Veröffentlicht in:Inorganic materials 2017-10, Vol.53 (10), p.1058-1063
Hauptverfasser: Kolosov, V. N., Miroshnichenko, M. N., Orlov, V. M.
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Magnesium oxide
Materials Science
Molybdenum
Molybdenum compounds
Precursors
Reaction products
Reduction
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Zusammenfassung:We have investigated the preparation of molybdenum powders by reducing the oxide compounds MoO 3 , MgMoO 4 , and CaMoO 4 with magnesium vapor at residual argon pressures in the range 5–20 kPa and temperatures in the range 700–800°C. Using the MgMoO 4 and CaMoO 4 compounds as precursors, we have obtained molybdenum powders with specific surface areas of up to 20 m 2 /g. The powders have a mesoporous structure. The reduction of the molybdenum compounds under such conditions was accompanied by separation of the reaction products due to the removal of magnesium oxide from the reaction zone.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168517100119