Specialized metallurgical processes – compositions for use therei – Compositions – Loose particulate mixture containing metal particles
Reexamination Certificate
2005-11-01
2005-11-01
Mai, Ngoclan T. (Department: 1742)
Specialized metallurgical processes, compositions for use therei
Compositions
Loose particulate mixture containing metal particles
Reexamination Certificate
active
06960237
ABSTRACT:
A niobium powder having a nitrogen content of about 500—about 7,000 ppm by weight, and having a mean particle diameter of at least about 0.2 μm and less than about 3 μm. Preferably the niobium powder has a reduced content of impurities. A sintered body of the niobium powder. This sintered body generally has a specific leakage current index of not more than about 400 [pA/(μF·V)]. The capacitor having (i) an electrode composed of the sintered body, (ii) a counter electrode and (iii) a dielectric intervening between the two electrodes exhibits good leakage current characteristics.
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Abstract and first page of JP A H1-167206, Pub. Date Jun. 30, 1989, “Prod. of Noibium Nitride”, F. Takao et al.
Mai Ngoclan T.
Showa Denko Kabushiki Kaisha
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