SYNTHESIS METHOD OF ALUMINUM OXYNITRIDE POWDER USING ALUMINUM POWDER

• Main Authors: KOO, JI EUN, CHO, YU JIN, CHANG, JI HO
• Format: Patent
• Language: English; Korean
• Published: 13.03.2014
• Subjects: ARTIFICIAL STONE; CASTING; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; REFRACTORIES; SLAG; TRANSPORTING; TREATMENT OF NATURAL STONE; WORKING METALLIC POWDER

The present invention relates to a method of preparing an aluminum oxynitride powder using an aluminum powder, and more particularly, to a method of preparing an aluminum oxynitride powder having good UV emitting properties. An aluminum powder is used as an initial powder, and the aluminum oxynitride powder may be synthesized by a simplified process at low costs when comparing to a common synthetic method. In addition, the nitration degree and the oxidation degree of the aluminum oxynitride powder may be controlled only by changing a heat treating temperature. Thus, the wavelength of light emitting in a UV region may be easily controlled. The method includes a step of mixing raw materials of forming a mixture by homogeneously mixing an aluminum powder and a carbon powder, a step of nitration and oxidation by heating the mixture obtained at the mixing step of the raw materials under an atmosphere blocked from the inflow of external air, a step of pulverizing a precipitate produced through the nitration and the oxidation step into a minute powder state, and decarbonization step of re-heating the precipitate having the minute powder state through the pulverizing step under an atmosphere allowing the inflow of external air. [Reference numerals] (10) Raw material mixing step; (20) Nitriding and oxidizing step; (30) Pulverizing step; (40) Decarbonizing step