Production of highly capacitive agglomerated valve metal powder and valve metal electrodes for the production of electrolytic capacitors
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United States of America Patent
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Nov 20, 1984
Grant Date -
N/A
app pub date -
Jul 19, 1982
filing date -
Jul 31, 1981
priority date (Note) -
Expired
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Abstract
A process for the production of agglomerated valve metal powder which comprises heating an admixture of a valve metal powder and a reducing agent in the presence of an inert gas or under high vacuum for a sufficient time and at a sufficiently elevated temperature that agglomeration of the valve metal powder occurs, and removing the reaction products of the reducing agent and the valve metal and any unreacted reducing agent from the agglomerated valve metal powder by subsequent reaction with an inorganic acid. The agglomerated powder can be sintered to prepare valve metal electrodes, e.g., anodes, which can also be prepared by direct sintering of the admixture of the metal powder and the reducing agent.
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