Phase formation of oxygen reduced valve metal oxides and granulation methods
AssigneeCabot Corporation
InventorsDavid M. Reed, Sridhar Venigalla, Jeffrey A. Kerchner
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Abstract
Valve metal suboxides having a primary suboxide phase and optionally a secondary suboxide phase, a valve metal phase, and/or at least one tertiary suboxide phase can be present in varying amounts. Also disclosed is anodes and capacitors containing the valve metal suboxides of the present invention. Also, a method to prepare a valve metal suboxide is further described which includes granulating one or more of the starting materials individually or together and/or granulating the final product.
Claims19
A valve metal oxide having an atomic ratio of valve metal to oxygen of 1:less than 2.5, wherein said valve metal oxide comprises granules having a size of from about 5 microns to about 1,000 microns, wherein said valve metal oxide has a flow of from 300 to about 1,000 mg/s as measured by ASTM B 213-03 using a 3 mm diameter orifice, wherein said valve metal oxide is niobium oxide.
Dependencies are inferred from the claim text.