Some Aspects of Interactions in the Mo–W–Al{sub 2}O{sub 3}–H{sub 2} System: Formation of Polyoxides

The possibility of formation of molybdenum and tungsten polyoxides in the Mo–W–Al{sub 2}O{sub 3}–H{sub 2} system at T = 2400 K and P = 1 bar in a controlled Ar + H{sub 2} atmosphere has been investigated by the method of thermodynamic analysis. The formation of polyoxides is found to occur both due...

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Bibliographic Details
Published in:Crystallography reports 2018-09, Vol.63 (5)
Main Authors: Kostomarov, D. V., Fedorov, V. A., Antonov, E. V.
Format: Article
Language:English
Subjects:
ALUMINIUM OXIDES
ARGON
ATMOSPHERES
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
HYDROGEN
MATERIALS SCIENCE
MOLYBDENUM OXIDES
POLYMERIZATION
TEMPERATURE RANGE 1000-4000 K
THERMODYNAMICS
TUNGSTEN OXIDES
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Summary:The possibility of formation of molybdenum and tungsten polyoxides in the Mo–W–Al{sub 2}O{sub 3}–H{sub 2} system at T = 2400 K and P = 1 bar in a controlled Ar + H{sub 2} atmosphere has been investigated by the method of thermodynamic analysis. The formation of polyoxides is found to occur both due to the processes involving Al{sub 2}O{sub 3} melt and in the absence of the latter. It is established that metals (Mo and W) and their mono-, di-, and even trioxides (in the latter case, mediated polymerization occurs) can be used as initial components to form polyoxides. It is shown that polyoxides themselves may interact with one of their main sources: Al{sub 2}O{sub 3} melt.
ISSN:1063-7745
1562-689X
DOI:10.1134/S1063774518050188