Method for producing electrolytic capacitors from valve metal powders
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United States of America Patent
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Jun 28, 2016
Grant Date -
Jul 3, 2014
app pub date -
Aug 8, 2012
filing date -
Aug 9, 2011
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Abstract
A process for producing an anode for an electrolytic capacitor includes pressing a tantalum powder around a tantalum wire, a tantalum ribbon, or a tantalum sheet to form a pressed body. The pressed body is sintered to form a porous sintered body. The porous sintered body is cooled to form a cooled porous sintered body. The cooled porous sintered body is treated with at least one oxidant comprising at least one of a gaseous oxidant and a liquid oxidant to form a treated sintered body. The treated sintered body is anodically oxidized in an electrolyte to form a dielectric layer.
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