Preparation of γ-Al₂O₃ Nanoparticles by Mechano-Chemical and Sonochemical Reaction

The γ-Al₂O₃ nanosolids, a kind of porous activated alumina, are widely used in plastic, rubber, ceramic and fireproofing materials as the reinforcing agent, where its characteristic high thermal stability, adhesion resistance, high mechanical strength and wear resistance are required. It can also be uniformly dispersed in many solvents, for example water, ethanol, acetone, benzene and xylene. In this paper a novel method is applied to prepare porous γ-Al₂O₃ nanoparticles. This method, which combines mechano-chemical and sonochemical reactions, is extremely innovative and may inspire new ideas for preparation of nanomaterials.