Production of nanoparticles and microparticles
OwnerNahum Parkansky, Raymon Boxmaninventors
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Abstract
A method of producing microparticles including: (a) providing a system including: (i) a vessel containing a liquid; (ii) at least a first pair of electrodes; (iii) a mechanism for igniting an electrical arc between the electrodes; (b) disposing the first pair of electrodes within the liquid, and (c) effecting at least one pulsed electrical discharge between the electrodes so as to produce a plasma bubble, and to produce the microparticles, the microparticles being associated with the plasma bubble, wherein the pulsed electrical discharge has a pulse duration of less than 1000 microseconds, and wherein the pulsed electrical discharge has a current amplitude of at least 1 ampere (A).
Claims50
A method of producing microparticles comprising the steps of:
- (a) providing a system including:
- (i) a vessel containing a liquid;
- (ii) at least a first pair of electrodes;
- (iii) a mechanism for igniting an electrical arc between said electrodes;
- (b) disposing said first pair of electrodes within said liquid, and
- (c) effecting at least one pulsed electrical discharge between said electrodes so as to produce a plasma bubble, and to produce the microparticles, the microparticles being associated with said plasma bubble.
- wherein said pulsed electrical discharge has a pulse duration of less than 1000 microseconds, and wherein said pulsed electrical discharge has a current amplitude of at least 1 ampere (A).
An apparatus for producing particles comprising:
- a vessel for holding a liquid,
- at least one pair of electrodes,
- a mechanism for positioning one electrode of said pair with respect to the other electrode of said pair,
- a mechanism for generating a pulsed electrical discharge between the two electrodes of said electrode pair,
- a mechanism for removing said particles.
A particle comprising:
- a metal and carbon, said particle having a substantially spherical shape, said particle having a diameter between 10 nm and 25 μm, and wherein a composition of said particle varies as a function of a distance from a center of said particle, such that a fraction of said metal decreases and a fraction of said carbon increases.
Dependencies are inferred from the claim text.