| 초록 |
Amorphous spherical silica (SiO2) nanoparticles from 12 to 47nm in average particle diameter were synthesized from sprayed droplets of TEOS by the flame spray pyrolysis. TEOS concentration, maximum flame temperature, and residence time of reactants in the flame were chosen as key experimental variables. As the TEOS concentration in the flame increased, the average particle diameter of the SiO2 nanoparticles having narrow size distribution increased. Larger SiO2 nanoparticles were synthesized as hydrogen and oxygen flow rate decreased in the flame, respectively. Average particle diameter decreased as the residence time of the precursor increased by controlling of carrier gas flow rate. |
