Process for the manufacture of nano-sized powders
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United States of America Patent
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Apr 3, 2012
Grant Date -
Dec 10, 2009
app pub date -
Oct 18, 2007
filing date -
Dec 1, 2006
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Abstract
Nano-sized metal-bearing powders and doped-powders are synthesized by means of a process whereby a non-volatile metal-bearing precursor powder or powder mixture is dispersed in a hot gas stream at relatively low temperatures. A first volatile reactant is added, converting the metal in the precursor into a volatile metal compound. Subsequently a second volatile reactant is injected into the gas stream, converting the volatile metal compound into a solid, which condenses as a nano-sized metal-bearing powder upon quenching. Finally, the vapour/metal-bearing powder mixture is separated from the gas stream.
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