Influence of the particle size distribution of potassium heptafluorotantalate on the characteristics of sodium-reduced tantalum powders

Influence of the particle size distribution of potassium heptafluorotantalate on the... Two versions of heterophase sodium-thermic reduction of potassium heptafluorotantalate were studied. One version implies initiation of the reaction in a homogeneous mixture of solid K2TaF7 and sodium flux, and the other, supply of solid K2TaF7 onto the surface of liquid sodium occurring above the molten halides. The surface area of the tantalum powder was correlated with the K2TaF7 particle size. The formation mechanisms for the tantalum powder particles were discussed for different reduction procedures. The conditions for preparation of powders with the specific surface area of ca. 4 m2 g−1 were identified. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Applied Chemistry Springer Journals

Influence of the particle size distribution of potassium heptafluorotantalate on the characteristics of sodium-reduced tantalum powders

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Publisher
Springer Journals
Copyright
Copyright © 2009 by Pleiades Publishing, Ltd.
Subject
Chemistry; Industrial Chemistry/Chemical Engineering; Chemistry/Food Science, general
ISSN
1070-4272
eISSN
1608-3296
D.O.I.
10.1134/S1070427209080035
Publisher site
See Article on Publisher Site

Abstract

Two versions of heterophase sodium-thermic reduction of potassium heptafluorotantalate were studied. One version implies initiation of the reaction in a homogeneous mixture of solid K2TaF7 and sodium flux, and the other, supply of solid K2TaF7 onto the surface of liquid sodium occurring above the molten halides. The surface area of the tantalum powder was correlated with the K2TaF7 particle size. The formation mechanisms for the tantalum powder particles were discussed for different reduction procedures. The conditions for preparation of powders with the specific surface area of ca. 4 m2 g−1 were identified.

Journal

Russian Journal of Applied ChemistrySpringer Journals

Published: Sep 24, 2009

References

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