Magnesium Removal From Magnesium Reduced Metal Powders
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United States of America Patent
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Issued Date -
May 8, 2008
app pub date -
Sep 19, 2005
filing date -
Sep 29, 2004
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Abandoned
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Abstract
A method of producing a refractory metal powder that includes providing a metal powder containing magnesium tantalate or magnesium niobate; and heating the powder in an inert atmosphere in the presence of magnesium, calcium and/or aluminum to a temperature sufficient to remove magnesium tantalate or magnesium niobate from the powder and/or heating the powder under vacuum to a temperature sufficient to remove magnesium tantalate or magnesium niobate from the powder, the heating steps being performed in any order. The metal powder can be formed into pellets at an appropriate sintering temperature, which can be formed into electrolytic capacitors.
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