Plasma synthesis of nanopowders
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United States of America Patent
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Oct 14, 2014
Grant Date -
Sep 27, 2007
app pub date -
Mar 8, 2007
filing date -
Mar 8, 2006
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Abstract
A process and apparatus for preparing a nanopowder are presented. The process comprises feeding a reactant material into a plasma reactor in which is generated a plasma flow having a temperature sufficiently high to vaporize the material; transporting the vapor with the plasma flow into a quenching zone; injecting a preheated quench gas into the plasma flow in the quenching zone to form a renewable gaseous condensation front; and forming a nanopowder at the interface between the renewable controlled temperature gaseous condensation front and the plasma flow.
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