Process for treating the surface of valve metals with chalcogens

Details Process for treating the surface of valve metals with chalcogens Process for treating the surface of valve metals with chalcogens

1984-09-28

1985-10-22

Silverberg, Sam

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

75 05BB, 75 05AB, 148 63, B22F 104

Patent

active

045486727

ABSTRACT:
The invention relates to a process for treating the surface of valve metals, in particular niobium and tantalum, in the form of agglomerated or non-agglomerated powders, thin foils or molded articles prepared from powder, for use as electrolytic capacitor electrodes, these metals being heated in at least one stage to temperatures of 300.degree. to 2,000.degree. C. under a high vacuum or an inert gas atmosphere and in the presence of chalcogens or chalcogen compounds, excluding oxygen.

REFERENCES:
patent: 4009007 (1977-02-01), Fry
patent: 4154609 (1979-05-01), Hahn
patent: 4231790 (1980-11-01), Hahn et al.
patent: 4356028 (1982-10-01), Bates
Official Gazette, Apr. 5, 1983, vol. 1029, p. 184, summary of U.S. Pat. No. 4,379,128.

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