Method of producing high surface area, low metal impurity

Details Method of producing high surface area, low metal impurity Method of producing high surface area, low metal impurity

1992-02-07

1993-08-10

Walsh, Donald P.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75363, B22F 918

Patent

active

052344916

ABSTRACT:
A process for producing a high purity tantalum powder wherein a small quantity of an active ingredient, having a higher thermodynamic potential and chemical activity than the metal surfaces of the reactor vessel, is added to the reactor before the reactor is heated to reaction temperatures.

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patent: 4032328 (1977-06-01), Hurd
patent: 4067736 (1978-01-01), Vartanian
patent: 4149876 (1979-04-01), Rerat
patent: 4231790 (1980-11-01), Hahn et al.
patent: 4684399 (1987-08-01), Bergman et al.
patent: 4897116 (1990-01-01), Scheel
patent: 4954169 (1990-09-01), Behrens

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