Process For Preparing Tantalum Powders For Use In An Electrolytic Capacitor With High Reliability and High Specific Capacitance
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United States of America Patent
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Mar 16, 2017
app pub date -
Feb 15, 2015
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Feb 21, 2014
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Abstract
The present invention provides a process for preparing tantalum powders for use in an electrolytic capacitor with high reliability and high specific capacitance, characterized in that the ratio of the average particle size of raw tantalum powders to the average particle size of tantalum flake powders is 0.5-25, preferably 1.5-10, more preferably 2-5. The process of the present invention is simple and has good controllability, the tantalum flake powder obtained has low content of metal impurities, high specific surface area, and after agglomerated, have good flowability and moldability, have high specific capacitance, and when used under high voltage, have low leakage current and high breakdown voltage.
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