Nitrided niobium powders and niobium electrolytic capacitors
AssigneeCabot Corporation
InventorJames A. Fife
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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.
Claims37
Niobium powder having a nitrogen content of at least about 300 ppm, wherein said niobium powder has a BET surface area of at least about 1.0 m.sup.2 /g.
Niobium powder having a nitrogen content of at least about 300 ppm and having a phosphorous level of less than about 400 ppm.
A capacitor anode comprising niobium powder having a nitrogen content of at least about 300 ppm, wherein said capacitor anode is formed at a voltage of about 50 volts or less.
An electrolytic capacitor anode comprising niobium powder having a nitrogen content of at least about 300 ppm, wherein said anode has a capacitance of from about 30,000 CV/g to about 61,000 CV/g.
Dependencies are inferred from the claim text.