Granted Patent
B2
US 12,215,926 · App. 18/177,671 · Granted Feb 4, 2025
Fabrication of ceramics from celestial materials using microwave sintering and mechanical compression
Assignee:
Trans Astronautica Corporation
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Abstract
Systems and methods for fabrication of ceramics from celestial materials using microwave sintering and mechanical compression for space mining applications are disclosed. In one aspect, a chamber for sintering loose mineral material into solid ceramic shapes includes a plurality of zirconia insulting plates configured to clamp the mineral material and forming a cavity in which the mineral loose material is contained, and at least one dipole array configured to generate microwave energy and apply the microwave energy to the mineral material.
Claims (36)
1. A chamber for sintering mineral material into solid ceramic shapes, comprising:
a cavity configured to contain the mineral material;
a plurality of insulting plates configured to clamp the mineral material and within the cavity;
a first dipole array positioned above the cavity; and
a second dipole array positioned below the cavity,
wherein the first and second dipole arrays are configured to generate microwave energy and apply the microwave energy to the mineral material while the insulating plates clamp the mineral material to sinter the mineral material into a solid ceramic, the first and second dipole arrays being spaced apart by a distance to provide for a standing wave of the microwave energy having maximum at a center of the cavity.
2. The chamber of claim 1 , further comprising:
a mechanical vice configured to apply pressure to the mineral material via at least two of the insulating plates.
3. The chamber of claim 2 , further comprising:
a plurality of pusher plates, each of the pusher plates arranged between the mechanical vice and one of the insulating plates.
4. The chamber of claim 3 , further comprising:
a plurality of ceramic plates, each of the ceramic plates arranged between one of the pusher plates and one of the insulating plates.
5. The chamber of claim 1 , wherein the first and second dipole arrays are polarized orthogonally to each other.
6. The chamber of claim 1 , wherein the first and second dipole arrays are each embedded in of the insulating plates.
7. The chamber of claim 1 , further comprising:
at least one microprocessor configured to control the first and second dipole arrays to periodically apply the microwave energy over a first period of time followed by a second period of time without applying the microwave energy to allow thermal hotspots to diffuse energy to cooler areas within the mineral material.
8. The chamber of claim 1 , further comprising:
at least one thermocouple temperature sensor configured to measure spatial thermal equalization within the mineral material.
9. The chamber of claim 1 , further comprising:
a vacuum chamber configured to provide vacuum conditions to the mineral material.
10. A method for sintering mineral material for use on the Moon, comprising:
obtaining the mineral material from lunar regolith;
applying electromagnetic wave heating simultaneously with mechanical pressure to the mineral material to form a solid ceramic component locally on the Moon; and
constructing a habitat or a base on the Moon using the solid ceramic component.
11. The method of claim 10 where mechanical pressure is uniaxial and applied from a vice.
12. The method of claim 10 further comprising:
applying heating periodically over a first period of time followed by a second period of time without heating to allow thermal hotspots to diffuse to cooler areas.
13. The method of claim 12 further comprising:
using at least one temperature sensor to detect the presence of hotspots; and
adjusting the duration of the first time periods and the second time periods using one or more electronic controllers.
14. The method of claim 10 where the mineral material is sintered in a vacuum environment.
15. The method of claim 10 where the mineral material is sintered directly into standardized shapes used in civil engineering construction including at least one of the following: paver plates, bricks, interlocking blocks, load bearing rods, or beams.
16. The method of claim 10 further comprising:
applying radiant energy into the mineral material using one or more radiating antennas of spatial extent equal to or larger than the wavelength of the radiant energy.
17. The method of claim 16 where the radiating antennas comprise dipole arrays.
18. The method of claim 16 where the one or more radiating antennas comprise a plurality of radiating antennas arranged to have mutual orthogonal polarizations.
Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded May 22, 2023
From: SMALL, JAMES G.; SERCEL, JOEL C.
To: TRANS ASTRONAUTICA CORPORATION
Reel/Frame 063721/0748 →
Continuity (3)
Provisional Application
63149189
· Feb 12, 2021
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