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Method for the densification and spheroidization of solid and solution precursor droplets of materials using microwave generated plasma processing

  • US 9,023,259 B2
  • Filed: 11/13/2012
  • Issued: 05/05/2015
  • Est. Priority Date: 11/13/2012
  • Status: Active Grant
First Claim
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1. A method of producing spheroidal and dense powder products which comprises:

  • introducing feed material through a materials feeder into a microwave plasma torch;

    entraining said feed material using an axis-symmetric laminar entrainment flow towards a microwave generated plasma;

    guiding said feed material towards the microwave generated plasma using an axis-symmetric laminar cooling flow;

    processing said feed material by exposing it to a uniform temperature profile within the microwave generated plasma;

    quenching plasma exhaust of said microwave generated plasma;

    filtering the exhaust gas of said microwave generated plasma; and

    extracting powder products from said filtered exhaust gas.

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