METHOD FOR PREPARING MONODISPERSE ALUMINA MINUTE PARTICLES

摘要

PURPOSE: Provided is a method for preparing monodisperse alumina minute particles whose average diameter is less than 1μm so that the particles may be suitable to uses without cohesion. Whereby, they can be used as powdered raw materials for electric functional materials, cosmetics, paints, artificial jewels or fillers. CONSTITUTION: A method for preparing monodisperse alumina minute particles comprises the steps of: (i) a first step to prepare octanol solution by melting aluminum alkoxide 0.05-0.25 mol/L in octanol 50-70 volume%; (ii) a second step to add a solution prepared by melting water 0.04-0.30mol/L in dimethylsulfoxide 30-10 volume% to the octanol solution after heating to 20-60deg.C to prepare a reacted solution; and (iii) a third step to grow alumina minutes particle nuclei generated in the early step of forming the reacted solution while stirring at normal temperature for 1 hour.