In-Situ Preparation of Highly Crystallized ZnO Nanopowders by Ultrasonic Spraying Combustion Method
To obtain a mass production of nanocrystalline ZnO powders, equipment that combines the conventional self-sustaining combustion process (SCP) with the ultrasonic spraying combustion method (USCM) were applied. The droplet was sprayed into the reaction zone of the furnace to carry out USCM that produces softly agglomerated crystalline ZnO particle with spherical shape. It was confirmed that the ZnO powder was prepared from ultrasonic spraying combustion method having smaller primary particle size, spherical shape with weak agglomeration and larger specific surface area than from conventional self-sustaining combustion method. Synthesized nanocrystalline ZnO powders have primary particle size in a range of 20∼30 nm, and specific surface area of about 20 m2/g under the optimum ultrasonic spray conditions.
Chunli BAI, Sishen XIE, Xing ZHU
N. H. Lee et al., "In-Situ Preparation of Highly Crystallized ZnO Nanopowders by Ultrasonic Spraying Combustion Method", Solid State Phenomena, Vols. 121-123, pp. 1269-1272, 2007