Nanostructured powders and related nanotechnology
View Patent ↗Methods to manufacture nanoscale particles comprising metals, alloys, intermetallics, ceramics are disclosed. The thermal energy is provided by plasma, internal energy, heat of reaction, microwave, electromagnetic, direct electric arc, pulsed electric arc and/or nuclear. The process is operated at some stage above 3000K and at high velocities. The invention can be utilized to prepare nanopowders for nanostructured products and devices such as ion conducting solid electrolytes for a wide range of applications, including sensors, oxygen pumps, fuel cells, batteries, electrosynthesis reactors and catalytic membranes.
1. A process for manufacturing nanoscale powders comprising:
providing a feed comprising solid powders;
providing thermal energy to the feed to produce a vapor from the feed;
nucleating nanoscale powders from the vapor;
thermally quenching said nucleated nanoscale powders;
collecting the thermally quenched nanoscale powders, wherein the step of providing thermal energy raises a peak processing temperature to at least 3000 K; and
wherein the process operates at a peak processing velocity greater than 46 feet per second.
2. The process of claim 1 wherein the thermal energy is provided in the form of plasma.
3. The process of claim 1 wherein the thermal energy is provided in the form of internal energy.
4. The process of claim 1 wherein the thermal energy is provided in the form of pulsed electric arc.
5. The process of claim 1 wherein the thermal energy is provided in the form of a combination of two or more of methods selected from the group consisting of internal energy, heat of reaction, inductive, microwave, electromagnetic, direct electric arc, pulsed electric arc and nuclear.
6. The process of claim 1 wherein the nanoscale powders comprise an oxygen containing compound.
7. The process of claim 1 wherein the nanoscale powders comprise a metal containing compound.
8. The process of claim 1 wherein the nanoscale powers comprise a metal.
9. The process of claim 1 wherein the nanoscale powers comprise an alloy.
10. The process of claim 1 wherein the peak processing velocity is greater than 1 Mach.
11. A process for manufacturing nanoscale powders comprising:
providing a feed comprising fluid;
providing thermal energy to the feed to produce a vapor from the feed;
nucleating nanoscale powders from the vapor;
thermally quenching said nucleated nanoscale powders;
collecting the thermally quenched nanoscale powders, wherein the step of providing thermal energy raises a peak processing temperature to at least 3000 K; and
wherein the process operates at a peak processing velocity greater than 46 feet per second.
12. The process of claim 11 wherein the thermal energy is provided in the form of plasma.
13. The process of claim 11 wherein the thermal energy is provided in the form of internal energy.
14. The process of claim 11 wherein the thermal energy is provided in the form of pulsed electric arc.
15. The process of claim 11 wherein the thermal energy is provided in the form of a combination of two or more of methods selected from the group consisting of internal energy, heat of reaction, inductive, microwave, electromagnetic, direct electric arc, pulsed electric arc and nuclear.
16. The process of claim 11 wherein the nanoscale powders comprise an oxygen containing compound.
17. The process of claim 11 wherein the nanoscale powders comprise a metal containing compound.
18. The process of claim 11 wherein the nanoscale powers comprise a metal.
19. The process of claim 11 wherein the nanoscale powers comprise an alloy.
20. The process of claim 11 wherein the peak processing velocity is greater than 1 Mach.
21. The process of claim 1 wherein the nanoscale powders comprise a ceramic.
22. The process of claim 11 wherein the nanoscale powders comprise a ceramic.
23. The process of claim 1 wherein the nanoscale powders comprise an intermetallic.
24. The process of claim 11 wherein the nanoscale powders comprise an intermetallic.
25. A process for manufacturing nanoscale powders comprising:
providing a feed comprising a precursor in powder form suspended in a gas;
providing thermal energy to the feed thereby converting the precursor in powder form into a stream comprising vapor;
providing an extended reaction zone downstream of the step of providing thermal energy wherein the stream comprising vapor is condensed to nucleate solid nanoscale powders by adjusting the thermokinetic state of the stream comprising vapor;
providing a thermal quench of the solid nanoscale powders;
collecting the thermally quenched solid nanoscale powders;
wherein the step of providing thermal energy raises the peak processing temperature to at least 3000 K; and
wherein the process operates at a peak processing velocity greater than 46 feet per second.
26. The process of claim 25 wherein the thermal energy is provided in the form of plasma.
27. The process of claim 25 wherein the thermal energy is provided in the form of internal energy.
28. The process of claim 25 wherein the thermal energy is provided in the form of pulsed electric arc.
29. The process of claim 25 wherein the thermal energy is provided in the form of a combination of two or more of methods selected from the group consisting of internal energy, heat of reaction, inductive, microwave, electromagnetic, direct electric arc, pulsed electric arc and nuclear.
30. The process of claim 25 wherein the nanoscale powders comprise an oxygen containing compound.
31. The process of claim 25 wherein the
nanoscale powders comprise a metal containing compound.
32. The process of claim 25 wherein the nanoscale powders comprise a metal.
33. The process of claim 25 wherein the nanoscale powders comprise an alloy.
34. The process of claim 25 wherein the precursor in powder form suspended in a gas has a particle size greater than 1 micrometer.
35. The process of claim 25 wherein the gas comprises oxygen.
36. A process for manufacturing nanoscale powders comprising:
providing a feed comprising a precursor in powder form suspended in a gas;
providing thermal energy to the feed thereby converting the precursor in powder form into a stream comprising vapor;
providing an extended reaction zone downstream of the step of providing thermal energy thereby providing additional residence time to the stream comprising vapor;
providing an additional zone downstream of the extended reaction zone wherein the stream comprising vapor is condensed to nucleate solid nanoscale powders by adjusting the thermokinetic state of the stream comprising vapor;
providing a thermal quench of the solid nanoscale powders downstream of the additional zone;
collecting the thermally quenched solid nanoscale powders; and
wherein the gas is selected to provide an oxidizing or reducing atmosphere during the step wherein the precursor in powder form is converted into a stream comprising vapor.
37. The process of claim 36 wherein the peak processing velocity is greater than 1 Mach.
38. The process of claim 36 wherein the nanoscale powders comprise an intermetallic.
39. The process of claim 36 wherein the nanoscale powders comprise a ceramic.
40. The process of claim 36 wherein the nanoscale powders comprise a composite.
41. The process of claim 36 wherein the thermokinetic state of the stream comprising vapor is adjusted by addition of an oxidizing, reducing or inert kinetic gas in the additional zone.
42. The process of claim 36 wherein the thermokinetic state of the stream comprising vapor is adjusted by reducing the temperature of the stream to achieve supersaturation, wherein the supersaturation causes condensation of solid nanoscale powders in the additional zone.
43. The process of claim 42 wherein the condensed solid nanoscale powders have an average grain size less than 100 nm.
44. The process of claim 42 wherein the condensed solid nanoscale powders have an average grain size less than 50 nm.
45. The process of claim 42 wherein the condensed solid nanoscale powders have an average grain size less than 30 nm.
46. The process of claim 42 wherein the condensed solid nanoscale powders have an average grain size less than 20 nm.
47. The process of claim 36 wherein the thermokinetic state of the stream comprising vapor is adjusted to achieve control of one or more of desired characteristics of nanoscale powders and wherein the desired characteristics is selected from the group: mean size of nanoscale powders, size distribution of nanoscale powders, phase of nanoscale powders, composition of nanoscale powders and interface of nanoscale powders.
48. The process of claim 36 wherein the gas used to suspend the precursor is selected to achieve control of one or more of desired characteristics of nanoscale powders and wherein the desired characteristics is selected from the group: mean size of nanoscale powders, size distribution of nanoscale powders, phase of nanoscale powders, composition of nanoscale powders and interface of nanoscale powders.