Manufacture of sodium-reduced tantalum powders with a specific capacity up to 100000 CV/g

The characteristics of the tantalum powders produced by sodium thermal reduction from salt melts based on potassium heptafluotantalate K 2 TaF 7 with additions of oxygen-containing tantalum compounds and sodium chloride are studied. The oxygen sources in a melt during sodium thermal reduction are re...

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Bibliographic Details
Published in:Russian metallurgy Metally 2011-07, Vol.2011 (7), p.660-662
Main Authors: Kolosov, V. N., Miroshnichenko, M. N., Orlov, V. M., Prokhorova, T. Yu
Format: Article
Language:English
Subjects:
Capacitors
Chemistry and Materials Science
Materials Science
Melts
Metallic Materials
Oxyfluorides
Potassium
Sodium
Sodium chloride
Tantalum
Thermal reduction
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Summary:The characteristics of the tantalum powders produced by sodium thermal reduction from salt melts based on potassium heptafluotantalate K 2 TaF 7 with additions of oxygen-containing tantalum compounds and sodium chloride are studied. The oxygen sources in a melt during sodium thermal reduction are represented by oxyfluoride compounds K 3 TaOF 6 , KTaOF 4 , and K 2 Ta 2 O 3 F 6 . The produced tantalum powders can be used as initial materials for the production of capacitor powders with a capacity up to 100 000 μC/g.
ISSN:0036-0295
1555-6255
1531-8648
DOI:10.1134/S003602951107007X