METHOD AND APPARATUS FOR NANOPOWDER AND MICROPOWDER PRODUCTION USING AXIAL INJECTION PLASMA SPRAY
First Claim
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1. Method of manufacturing nanopowders or micropowders, comprising:
- i) providing an axially injected plasma torch comprising a convergence chamber;
ii) axially delivering a liquid precursor to said plasma torch;
iii) atomizing said liquid precursor prior to delivery to said convergence chamber thereby forming a hot stream of particles in the plasma stream generated by said torch;
iv) introducing said hot stream of particles into a chamber;
v) introducing a quenching gas or liquid into said chamber at a quenching location;
vi) cooling said hot stream of particles and collecting the powder thereby produced.
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Abstract
A method and system for production of powders, such as micropowders and nanopowders, utilizing an axial injection plasma torch. Liquid precursor is atomized and injected into the convergence area of the plasma torch. The hot stream of particles is subsequently quenched and the resultant powders collected.
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Citations
21 Claims
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1. Method of manufacturing nanopowders or micropowders, comprising:
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i) providing an axially injected plasma torch comprising a convergence chamber; ii) axially delivering a liquid precursor to said plasma torch; iii) atomizing said liquid precursor prior to delivery to said convergence chamber thereby forming a hot stream of particles in the plasma stream generated by said torch; iv) introducing said hot stream of particles into a chamber; v) introducing a quenching gas or liquid into said chamber at a quenching location; vi) cooling said hot stream of particles and collecting the powder thereby produced. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A system for manufacturing nanopowders or micropowders comprising:
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i) feed means for delivering a liquid precursor; ii) an axially injected plasma spray torch comprising a convergence chamber; iii) atomizing means for atomizing said liquid precursor prior to delivery to said convergence chamber thereby forming a hot stream of particles in the plasma stream generated by said torch; iv) a chamber for reaction of said hot stream of particles with a quenching gas; v) means for introducing said quenching gas to said chamber at a quenching location; and vi) means for collecting the nanopowders or micropowders thereby produced. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification