Sodium Thermal Reduction of Tantalum Powders from Melts with Tantalum Pentaoxide Additions

摘要

The effect of the oxygen concentration in a melt on the characteristics of sodium-reduced tantalum powders, which were produced from potassium heptafluotantalate-based melts with tantalum pentaoxide addi-tions, is studied. An increase in the oxygen content in the initial melt from 0.35 to 2.0 wt % leads to an increase in the specific surface of the formed powder from 1.2 to 3.5 m~2/g. The specific charge of anodes made from these powders is 37800-70700 CV/g.