Patent ID: 6835367
Filing Date: 2004-12-28
Classification: B82Y,C01B,C01F,C01G,C01P

Abstract:
A process for synthesis of nanoparticles of phase pure ceramic oxides of a multi-component system comprising two or more metal ions, said process comprising:(a) preparing a solution containing the metal ions by dissolving their metal salts in an organic solvent or in water; (b) preparing a precursor by complexing the metal ions with a complexing agent while keeping the ratio of the charges of the complexing agent to the charges of the metal ions as unity wherein said precursor is formed in the solution; (c) adding nitric acid and ammonia; nitric acid and ammonium hydroxide; or ammonium nitrate to the solution to adjust the nitrate and ammonia content of the solution; and (d) heating the solution formed in step (c) from room temperature to 250-300Â° C. to produce a foam which subsequently ignites to provide a combustion product comprising the nanoparticles.