Magnesiothermal synthesis of W-WB powders in ionic melts

Conditions for synthesis of W-W 2 B and W-WB powders by simultaneous reduction of the metal oxide- and boron-containing compounds with magnesium in molten salts of the NaF-NaCl system (1: 1) have been considered. It is shown that synthesis involves successive redox reactions yielding tungsten powder...

Full description

Saved in:
Bibliographic Details
Published in:Theoretical foundations of chemical engineering 2009-08, Vol.43 (4), p.468-472
Main Authors: Gostishchev, V. V., Boiko, V. F., Pinegina, N. D.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Technology of Inorganic Substances and Materials
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Conditions for synthesis of W-W 2 B and W-WB powders by simultaneous reduction of the metal oxide- and boron-containing compounds with magnesium in molten salts of the NaF-NaCl system (1: 1) have been considered. It is shown that synthesis involves successive redox reactions yielding tungsten powders with variable concentrations of boride phases. The powder fineness characteristics have been determined in experiments. The volume particle size distribution of the powders has been calculated. It is found that the specific surface area decreases from 1.18 × 10 6 to 0.63 × 10 6 as the concentration of the boride phase in the powders rises to ∼40%.
ISSN:0040-5795
1608-3431
DOI:10.1134/S0040579509040198