USA As Represented by Secretary of the Navy

California Institute of Technology

Edward P Gorzkowski, Iii

Syed B Qadri

Bhakta B Rath

James A Wollmershauser

Boris N Feigelson

Dana A Kazerooni

John Drazin

M Ashraf Imam

Richard Robert Hofer

Arne W Fliflet

Bryan William McEnerney

Katherine T Faber

Ming-Jen Pan

Ame W Fliflet

M Ashraf Iman

Celia S Chari

Aspects disclosed herein include graphite and hexagonal boron nitride bimaterials, methods of making these bimaterials, and electric propulsion devices or thrusters with these bimaterials. Aspects disclosed herein include electric propulsion devices comprising: at least one portion comprising or formed of a monolithic bimaterial; wherein the monolithic bimaterial comprises a graphite material and a hexagonal boron nitride material; and wherein the graphite material and hexagonal boron nitride material are monolithically integrated in the bimaterial.

Graphite/hexagonal boron nitride bimaterials for electric propulsion

Nano-structures of Aluminum Nitride and a method of producing nano-structures of Aluminum Nitride from nut shells comprising milling agricultural nuts into a fine nut powder, milling nanocrystalline AlOinto a powder, mixing, pressing the fine nut powder and the powder of nanocrystalline AlO, heating the pellet, maintaining the temperature of the pellet at about 1400&#xb0; C., cooling the pellet, eliminating the residual carbon, and forming nano-structures of AlN. An Aluminum Nitride (AlN) product made from the steps of preparing powders of agricultural nuts using ball milling, preparing powders of nanocrystalline AlO, mixing the powders of agricultural nuts and the powders of nanocrystalline AlOforming a homogenous sample powder of agricultural nuts and AlO, pressurizing, pyrolyzing the disk, and reacting the disk and the nitrogen atmosphere and forming AlN.

Aluminum nitride synthesis from nut shells

SiNnanotubes and nanorods wherein the nanotubes and nanorods of silicon nitride are pure &#x3b1;-SiNformed by carbothermal reduction of SiOfrom reacting agricultural husk material in heat and forming the silicon nitride nanotubes and nanorods.

Nanostructured silicon nitride synthesis from agriculture waste

A process for producing metastable nanocrystalline alpha-alumina (&#x3b1;-AlO) having particle sizes smaller than 12 nm. Starting crystallites of &#x3b1;-AlOhaving a particle size larger than 12 nm, typically on the order of about 50 nm, are ball-milled at low temperatures to produce a nanocrystalline &#x3b1;-AlOpowder having a particle size of less than 12 nm, i.e., below the theoretical room temperature thermodynamic size limit at which &#x3b1;-AlOchanges phase to &#x3b3;-AlO, wherein the powder remains in the &#x3b1;-AlOphase at all times.

Nanocrystalline alpha alumina and method for making the same

A method of making Nanostructured Zinc Silicate from renewable sources comprising preparing powders of husks, preparing powders of ZnO, mixing the powders of husks and the powders of ZnO and forming a homogenous sample powder, pressing the homogenous sample and forming pellets, heating the pellets and forming nanostructured zinc silicate. The nanostructured zinc silicate from renewable sources product of the process of preparing powders of husks, preparing powders of ZnO, mixing the powders of husks and the powders of ZnO and forming a homogenous sample powder, pressing the homogenous sample and forming pellets, heating the pellets and forming nanostructured zinc silicate.

Synthesis of nanostructured zinc silicate from renewable sources

A method of making Aluminum Nitride (AlN) from nut shells comprising preparing powders of agricultural nuts, preparing powders of nanocrystalline AlO, mixing the powders and thereby forming a homogenous sample powder of agricultural nuts and AlO, pressurizing the homogenous sample powder into a disk, heat treating or pyrolyzing the disk in a nitrogen atmosphere, reacting the disk and the nitrogen atmosphere and forming AlN, and wherein the AlN is nano-structured AlN and in a pure form and in the wurtzite phase of AlN. A method of producing Aluminum Nitride comprising milling nuts into a powder, milling a powder of nanocrystalline AlO, mixing, pressing into a pellet, providing nitrogen, heating, and forming AlN. An Aluminum Nitride product from preparing powders of nuts and AlO, mixing, and forming a powder, pressurizing into a disk, pyrolyzing in nitrogen, and forming AlN.

A method of making SiNnanotubes and nanorods comprising adding agricultural husk material powder to a container, wherein the container is a covered boron nitride crucible, creating an inert atmosphere of nitrogen inside the container, applying heat, heating the agricultural husk material, and reacting the agricultural husk material and forming silicon nitride, wherein the silicon nitride is nanotubes and nanorods.

Disclosed herein is a method of: placing between a cooling element and an opposing surface a slurry of: a dielectric powder containing barium titanate, a dispersant, a binder, and water; maintaining the cooling element at a temperature below the opposing surface to cause the formation of ice platelets perpendicular to the surface of the cooling element and having the powder between the platelets; subliming the ice platelets to create voids; sintering the powder to form the dielectric material; and filling the voids with the polymeric material. The process can produce a composite having: a sintered dielectric material of barium titanate and platelets of a polymeric material embedded in the dielectric material. Each of the platelets is perpendicular to a surface of the composite.

Ceramic lamellar composites

This disclosure concerns a method of making silicon carbide involving adding agricultural husk material to a container, creating a vacuum or an inert atmosphere inside the container, applying conventional heating or microwave heating, heating rapidly, and reacting the material and forming silicon carbide (SiC).

Silicon carbide synthesis

This disclosure concerns a method of making silicon carbide involving adding one from the group of rice husk material, sorghum, peanuts, maple leaves, and/or corn husk material to a container, creating a vacuum or an inert atmosphere inside the container, applying conventional heating or microwave heating, heating rapidly, and reacting the material and forming silicon carbide (SiC).

Growing community of inventors

Odenton, MD, United States of America

Edward P Gorzkowski, Iii