A method of enhancing the flowability of a powder. The powder is defined by a plurality of particles having an initial level of inter-particle forces between each particle. The method comprises: treating the powder, wherein the level of inter-particle forces between each particle is substantially de
A method of enhancing the flowability of a powder. The powder is defined by a plurality of particles having an initial level of inter-particle forces between each particle. The method comprises: treating the powder, wherein the level of inter-particle forces between each particle is substantially decreased from the initial level; fluidizing the treated powder; flowing the treated powder into a plasma arc chamber; the plasma arc chamber generating a plasma arc; and the plasma arc chamber operating on the treated powder using the generated plasma arc. Preferably, the inter-particle forces are decreased by coating the particles with an organic surfactant.
대표청구항▼
1. A method of enhancing the flowability of a powder to produce nanoparticles, the powder defined by a plurality of particles having an initial level of inter-particle forces between each particle, the method comprising: coating the powder with an organic material, wherein the level of inter-particl
1. A method of enhancing the flowability of a powder to produce nanoparticles, the powder defined by a plurality of particles having an initial level of inter-particle forces between each particle, the method comprising: coating the powder with an organic material, wherein the level of inter-particle forces between each particle is substantially decreased from the initial level;fluidizing the coated powder;flowing the coated powder into a plasma arc chamber;the plasma arc chamber generating a plasma arc;the generated plasma arc vaporizing the coated powderin order to nano-size the powder to produce nanoparticles. 2. The method of claim 1, wherein the organic material is a surfactant. 3. The method of claim 2, wherein the surfactant is sorbitan monooleate. 4. The method of claim 3, wherein each particle in the plurality of particles is a non-oxide. 5. The method of claim 1, wherein each particle in the plurality of particles is an oxide and the organic material is a material selected from the group consisting of trialkoxysilane, alkyltrialkoxysilane, trialkylalkoxysilane, trialkyldimethylaminosilane, trialkylchlorosilane, and octyltriethoxysilane. 6. The method of claim 1, wherein coating the powder comprises: disposing the powder in a solvent within a container, wherein the solvent comprises the organic material;agitating the combination of the powder and the solvent in the container;coating the plurality of particles with the organic material; andseparating substantially all of the remaining solvent from the coated powder. 7. The method of claim 6, wherein the organic material is a surfactant. 8. The method of claim 7, wherein the surfactant is sorbitan monooleate. 9. The method of claim 8, wherein each particle in the plurality of particles is a non-oxide. 10. The method of claim 8, wherein the solvent further comprises a hydrocarbon. 11. The method of claim 10, wherein the hydrocarbon is toluene. 12. The method of claim 10, wherein the hydrocarbon is cyclohexane. 13. The method of claim 6, wherein each particle in the plurality of particles is an oxide and the organic material is a material selected from the group consisting of trialkoxysilane, alkyltrialkoxysilane, trialkylalkoxysilane, trialkyldimethylaminosilane, trialkylchlorosilane, and octyltriethoxysilane. 14. The method of claim 6, wherein separating substantially all of the solvent from the coated powder comprises decanting substantially all of the remaining solvent from the container. 15. The method of claim 14, further comprising the step of drying the coated powder. 16. The method of claim 15, wherein the step of drying comprises applying heat and vacuum pressure to the coated powder. 17. A method of enhancing the flowability of a powder to produce nanoparticles, the powder defined by a plurality of particles having an initial level of inter-particle forces between each particle, the method comprising: disposing the powder in a solvent within a container, wherein the solvent comprises an organic material;coating the plurality of particles with the organic material;separating substantially all of the remaining solvent from the coated powder, wherein the level of inter-particle forces between each particle is substantially decreased from the initial level;fluidizing the coated powder;flowing the coated powder into a plasma arc chamber;the plasma arc chamber generating a plasma arc;the generated plasma arc vaporizing the coated powder; andin order to nano-size the powder to produce nanoparticles. 18. The method of claim 17, wherein the organic material is a surfactant. 19. The method of claim 18, wherein the surfactant is sorbitan monooleate. 20. The method of claim 19, wherein the solvent further comprises a hydrocarbon. 21. The method of claim 20, wherein the hydrocarbon is toluene. 22. The method of claim 20, wherein the hydrocarbon is cyclohexane. 23. The method of claim 19, wherein each particle in the plurality of particles is a non-oxide. 24. The method of claim 17, wherein each particle in the plurality of particles is an oxide and the organic material is a material selected from the group consisting of trialkoxysilane, alkyltrialkoxysilane, trialkylalkoxysilane, trialkyldimethylaminosilane, trialkylchlorosilane, and octyltriethoxysilane. 25. The method of claim 17, wherein separating substantially all of the remaining solvent from the coated powder comprises decanting substantially all of the solvent from the container. 26. The method of claim 25, further comprising the step of drying the coated powder. 27. The method of claim 26, wherein the step of drying comprises applying heat and vacuum pressure to the coated powder.
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