An aluminum nitride particle including: a plurality of planes randomly arranged in a surface of the particle, the plurality of planes forming an obtuse ridge part or an obtuse valley part in the surface of the particle, the plurality of planes being observable in a scanning electron micrograph with 500 times magnification; wherein the particle has a longer diameter L of 20 to 200 μm; a ratio L/D of the longer diameter L (unit: μm) to a shorter diameter D (unit: μm) of the particle is 1 to 1.25; and the plurality of planes comprise a first plane, wherein an area S (unit: μm.sup.2) of the first plane satisfies S/L≥1.0 μm.

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 Al.sub.2O.sub.3 into a powder, mixing, pressing the fine nut powder and the powder of nanocrystalline Al.sub.2O.sub.3, heating the pellet, maintaining the temperature of the pellet at about 1400 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 Al.sub.2O.sub.3, mixing the powders of agricultural nuts and the powders of nanocrystalline Al.sub.2O.sub.3 forming a homogenous sample powder of agricultural nuts and Al.sub.2O.sub.3, pressurizing, pyrolyzing the disk, and reacting the disk and the nitrogen atmosphere and forming AlN.

Aluminum nitride particles used as a material of an aluminum nitride sintered compact are disclosed. The aluminum nitride particles may have a same crystal orientation. The aluminum nitride particles each have an aspect ratio of 3 or more, a plate-like shape, a planar length of 0.6 m or more and 20 m or less, and a thickness length of 0.05 m or more and 2 m or less.

Aluminum nitride crystal particles, aluminum nitride powders containing the same, production processes for both of them, an organic polymer composition comprising the aluminum nitride crystal particles and a sintered body. Each of the aluminum nitride crystal particles has a flat octahedral shape in a direction where hexagonal faces are opposed to each other, which is composed of two opposed hexagonal faces and 6 rectangular faces, in which the average distance D between two opposed corners of each of the hexagonal faces is 3 to 110 m, the length L of the short side of each of the rectangular faces is 2 to 45 m, and L/D is 0.05 to 0.8; each of the hexagonal faces and each of the rectangular faces cross each other to form a curve without forming a single ridge; and the true destiny is 3.20 to 3.26 g/cm.sup.3.

A method of producing ceramic wafer includes a forming step and processing step. The processing step includes forming positioning notch or positioning, flat edge and edge profile, which avoids the ceramic wafers to have processing defect during cutting, grinding, and polishing, for increasing yield. The ceramic particles for producing ceramic wafer include nitride ceramic powder, oxide ceramic powder, and nitride ceramic powder. The ceramic wafer has low dielectric constant, insulation, and excellent heat dissipation, which can be applied for the need of semiconductor process, producing electric product and semiconductor equipment.

The present invention provides method for producing a spherical aluminum nitride powder. In an embodiment, the method comprises mixing an Al precursor and a flux in a solvent to produce a mixed solution, spray-drying the mixed solution to form a spray-dried powder, mixing the spray-dried powder and a carbon-based material to form a mixture, heat treating the mixture in a nitrogen atmosphere to form a heat-treated compound, and decarbonizing the heat-treated compound in an air atmosphere, wherein the flux is at least one selected from the group consisting of Cu.sub.2O, TiO.sub.2, Bi.sub.2O.sub.3, and CuO, or a mixture of at least one selected from the group consisting of Cu.sub.2O, TiO.sub.2, Bi.sub.2O.sub.3, and CuO and at least one selected from the group consisting of CaF.sub.2 and Y.sub.2O.sub.3.

Methods, systems, and components suitable for carbothermal reduction processes are disclosed. Exemplary systems include a reactor, such as hybrid solarthermal-electric reactor, a solar thermal reactor, an electric reactor, or a reactor heated by gas combustion, a pellet source, a gas reactant source, and a vacuum source. The reactor can operate as a moving bed or pseudo moving bed reactor.

A method of producing Aluminum Nitride comprising milling nuts into a powder, milling a powder of nanocrystalline Al.sub.2O.sub.3, mixing, pressing into a pellet, providing nitrogen, heating, and forming AlN. An Aluminum Nitride product from preparing powders of nuts and Al.sub.2O.sub.3, mixing, and forming a powder, pressurizing into a disk, pyrolizing in nitrogen, and forming AlN in a pure form and in the wurtzite phase. An Aluminum Nitride (AlN) from preparing powders of agricultural nuts, preparing powders of nanocrystalline Al.sub.2O.sub.3, mixing the powders and thereby forming a homogenous sample powder of agricultural nuts and Al.sub.2O.sub.3, pressurizing the homogenous sample powder into a disk, heat treating or pyrolizing 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.

The present invention provides method for producing a spherical aluminum nitride powder. In an embodiment, the method comprises mixing an Al precursor and a flux in a solvent to produce a mixed solution, spray-drying the mixed solution to form a spray-dried powder, mixing the spray-dried powder and a carbon-based material to form a mixture, heat treating the mixture in a nitrogen atmosphere to form a heat-treated compound, and decarbonizing the heat-treated compound in an air atmosphere, wherein the flux is at least one selected from the group consisting of Cu.sub.2O, TiO.sub.2, Bi.sub.2O.sub.3, and CuO, or a mixture of at least one selected from the group consisting of Cu.sub.2O, TiO.sub.2, Bi.sub.2O.sub.3, and CuO and at least one selected from the group consisting of CaF.sub.2 and Y.sub.2O.sub.3.

A method of making Aluminum Nitride (AlN) from nut shells comprising preparing powders of agricultural nuts, preparing powders of nanocrystalline Al.sub.2O.sub.3, mixing the powders and thereby forming a homogenous sample powder of agricultural nuts and Al.sub.2O.sub.3, 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 Al.sub.2O.sub.3, mixing, pressing into a pellet, providing nitrogen, heating, and forming AlN. An Aluminum Nitride product from preparing powders of nuts and Al.sub.2O.sub.3, mixing, and forming a powder, pressurizing into a disk, pyrolyzing in nitrogen, and forming AlN.