High capacitance niobium powders and electrolytic capacitor anodes
AssigneeCabot Corporation
InventorsKurt A. Habecker, James A. Fife
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Abstract
A niobium powder is described which when formed into an electrolytic capacitor anode, the anode has the capacitance of at least 62,000 CV/g. Methods of making flaked niobium powder which have high capacitance capability when formed into electrolytic capacitor anodes is also described. Besides niobium, the present invention is also applicable to other metals, including valve metals.
Claims58
A niobium powder, wherein when said powder is formed into an electrolytic capacitor anode, said anode has a capacitance of at least 65,000 CV/g., and wherein said niobium powder has a BET surface area of at least about 5.5 m2/g.
A niobium powder having a BET surface area of at least about 5.5 m2/g.
A method of making a flaked niobium powder comprising milling a niobium chips to form flaked niobium powder and then subjecting the flaked niobium powder to deoxidation and then continuing milling of the flaked niobium powder.
Dependencies are inferred from the claim text.