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Method for manufacturing nanopowders of oxide through DC plasma thermal reaction

  • US 7,125,537 B2
  • Filed: 12/30/2004
  • Issued: 10/24/2006
  • Est. Priority Date: 02/20/2004
  • Status: Active Grant
First Claim
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1. A method for manufacturing oxide nanopowders, comprising the following steps:

  • providing a non-transferred DC plasma apparatus equipped with one to three sets of non-transferred electrodes, a plasma-convergence section and a nozzle for spraying out plasma;

    generating a plasma in the plasma-convergence section by introducing a direct current to the non-transferred electrodes in the presence of the plasma-forming gas;

    introducing a solid precursor to the plasma-convergence section continuously, wherein the solid precursor is vaporized and oxidized before being sprayed out with the plasma jet; and

    obtaining nanopowders by blowing the plasma jet containing the vaporized and oxidized precursor through a vortical cooling-gas.

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