Tantalum production via a reduction of K2TAF7, with diluent salt

Details Tantalum production via a reduction of K2TAF7, with diluent salt Tantalum production via a reduction of K2TAF7, with diluent salt

1994-05-19

1995-08-22

Rosenberg, Peter D.

Specialized metallurgical processes, compositions for use therei

Processes

Producing or purifying free metal powder or producing or...

B22F 900

Patent

active

054429781

ABSTRACT:
Fine tantalum powder of high surface area, high capacitance, low leakage and high breakdown voltage is produced by sodium reduction of highly dilute fluotantalate salt charges at high reaction temperatures and stepwise additions of the sodium reducing agent in a time-series of substantially even weight slugs added over the whole course of the reduction reaction to a melt of the charge and using the small exotherm of reduction provided by each slug as a temperature control factor.

REFERENCES:
patent: 2950185 (1960-08-01), Hellier
patent: 4149876 (1979-04-01), Rerat
patent: 4684399 (1987-08-01), Bergman
patent: 4725312 (1988-02-01), Seon

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