Removal of organic acid based binders from powder metallurgy compacts
AssigneeKemet Electronics Corporation
InventorsBrian John Melody, John Tony Kinard, Keith Lee Moore, David Alexander Wheeler
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Abstract
Organic acid-based binders are efficiently removed from powder metallurgy compacts, such as tantalum capacitor anode bodies, by immersion in a heated aqueous alkanolamine solution followed by rinsing in warm water. This method results in lower residual carbon and oxygen levels than are found with thermal binder removal methods.
Claims16
A method of removing organic acid-based binders from a powder metallurgy compact comprising immersing said compact in an aqueous solution of alkanolamine at a temperature of between about 50° C. and about 100° C., for a time sufficient to react with the organic acid-based binder to form a water-soluble salt, and then rinsing the compact.
Dependencies are inferred from the claim text.