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US 6,616,728 B2Granted
Nitrided niobium powders and niobium electrolytic capacitors
AssigneeCabot Corporation
InventorJames A. Fife
Life of this patent
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Abstract
A nitrogen containing niobium powder is disclosed as well as electrolytic capacitors formed from the niobium powders. Methods to reduce DC leakage in a niobium anode are also disclosed.
Claims42
Niobium powder having a nitrogen content of at least about 300 ppm and BET surface area of at least 0.62 m2/g.
A capacitor anode comprising niobium powder having a nitrogen content of at least about 300 ppm, wherein said anode has a working voltage of from about 4 to about 16 volts.
Nitrided niobium powder having a BET surface area of at least 0.62 m2/g.
Dependencies are inferred from the claim text.