Tantalum powder

Details Tantalum powder Tantalum powder

1988-06-21

1990-07-10

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75228, 75245, 75954, 361311, 419 23, 420427, B22F 100

Patent

active

049404903

ABSTRACT:
An improved flaked tantalum powder and process for making the flaked powder are disclosed. The powder is characterized by having a Scott density greater than about 18 g/in.sup.3 and preferably at least about 90% of the flake particles having no dimension greater than about 55 micrometers. Agglomerates of the flaked tantalum powder, provide improved flowability, green strength and presssing characteristics compared to conventional flaked tantalum powders. The improved flaked tantalum powder can be made by preparing a flaked tantalum and then reducing the flake size until a Scott density greater than about 18 g/in.sup.3 is achieved. The invention also provides pellets and capacitors prepared from the above-described flaked tantalum powder.

REFERENCES:
patent: 4441927 (1984-04-01), Getz et al.
patent: 4486225 (1984-12-01), Osborn et al.
patent: 4555268 (1985-11-01), Getz
patent: 4740238 (1988-04-01), Schiele

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