Method for the production of niobium and tantalum powder

Details Method for the production of niobium and tantalum powder Method for the production of niobium and tantalum powder

2005-04-09

2010-11-02

Wyszomierski, George (Department: 1793)

Specialized metallurgical processes, compositions for use therei

Compositions

Loose particulate mixture containing metal particles

C148S422000, C420S427000

Reexamination Certificate

active

07824463

ABSTRACT:
Process for the production of valve metal powders, in particular niobium and tantalum powder, by reduction of corresponding valve metal oxide powders by means of vaporous reducing metals and/or hydrides thereof, preferably in the presence of an inert carrier gas, wherein the reduction is performed at a vapor partial pressure of the reducing metal/metal hydride of 5 to 110 hPa and an overall pressure of less than 1000 hPa, and tantalum powder obtainable in this way having a high stability of the powder agglomerate particles.

REFERENCES:
patent: 6171363 (2001-01-01), Shekhter et al.
patent: 6193779 (2001-02-01), Reichert et al.
patent: 7150776 (2006-12-01), Shekhter et al.
patent: 2003/0110890 (2003-06-01), He et al.
patent: 1 302 263 (2003-04-01), None
patent: 2003-013115 (2003-01-01), None
patent: WO-00/67936 (2000-11-01), None

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