Microwave plasma chemical synthesis of ultrafine powders
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United States of America Patent
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Issued Date -
Aug 22, 2002
app pub date -
Apr 4, 2002
filing date -
Nov 4, 1996
priority date (Note) -
Abandoned
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Abstract
The present invention relates to the production of ultrafine powders using a microwave plasma apparatus and chemical synthesis technique. Microwaves generated by a magnetron (1) are passed through waveguides (2) before they arrive at the head of a plasmatron (3). These high energy microwaves ionize a plasma gas, thus releasing large amounts of energy. The energy thus released is utilized to initiate and sustain chemical reactions between the desired elements being pumped in a spiral pattern into the plasmatron (3). The reaction products are quenched rapidly in a reactor column (4) into ultrafine powders.
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