Abstract
The characteristics of the tantalum powders produced by sodium thermal reduction from salt melts based on potassium heptafluotantalate K2TaF7 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 K3TaOF6, KTaOF4, and K2Ta2O3F6. 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.
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