Patent ID: 6096282
Filing Date: 2000-08-01
Classification: C01B,C01P

Abstract:
A method of preparing a metal nitride comprising:a) mixing stoichiometric quantities of a powdered metal halide with a powdered alkali metal nitride to form a substantially uniform blend, said mixing being done in an inert atmosphere,b) adding a predetermined amount of a powdered ammonium halide to the uniform blend to form a reaction mixture while maintaining the inert atmosphere,c) placing the reaction mixture in a reaction vessel without exposing the reaction mixture to a reactive amount of oxygen,d) rapidly heating the reaction mixture to an elevated temperature, said heating causing a chemical reaction to occur and the desired inorganic nitride to be formed, the temperature of the reaction not exceeding about 800.degree. C.; andd) separating the desired inorganic nitride from other compounds formed in the reaction, recovering a pure crystalline nitride.