Calcium Vapor Reduction of Niobium Oxide Compounds

— Calcium vapor reduction of niobium oxide compounds has been studied at temperatures from 1023 to 1123 K. The adiabatic temperature of calcium reduction of niobium pentoxide (3020 K) and the Mg 4 Nb 2 O 9 niobate (2525 K) has been determined by thermodynamic modeling with the TERRA software suite....

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Bibliographic Details
Published in:Inorganic materials 2023-11, Vol.59 (11), p.1250-1260
Main Authors: Kryzhanov, M. V., Orlov, V. M.
Format: Article
Language:English
Subjects:
Calcium compounds
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Niobium oxides
Reduction
Thermodynamic models
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Summary:— Calcium vapor reduction of niobium oxide compounds has been studied at temperatures from 1023 to 1123 K. The adiabatic temperature of calcium reduction of niobium pentoxide (3020 K) and the Mg 4 Nb 2 O 9 niobate (2525 K) has been determined by thermodynamic modeling with the TERRA software suite. We have assessed the effects of process temperature, reduction time, and precursor powder particle size on the degree of reduction, specific surface area, and pore structure of the niobium powders.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168523110079