PREPARATION METHOD OF INDIUM TIN OXIDE NANO-POWDER USING FLAME SPRAY PYROLYSIS

摘要

PURPOSE: A method for preparing an indium tin oxide nano-powder by using flame spray pyrolysis is provided, to obtain an indium tin oxide nano-powder having a size of 10-25 nm by aerosol method. CONSTITUTION: The method comprises the step of injecting a liquid drop comprising a reactant which is a mixture of indium nitrate and tin chloride dissolved in distilled water, oxygen, hydrogen and air simultaneously into a quintuple-tube flame reactor and generating flame of 900 deg.C or more to prepare an indium tin oxide nano-powder having an average particle size of 10-25 nm. Preferably the first tube(21) flows in 7 vol% of 0.4-0.8 M reactant, the second tube(22) flows in 3 vol% of argon, the fourth tube(24) flows in 20 vol% of oxygen, the third tube(23) flows in 13-20 vol% of hydrogen, and the fifth tube(25) flows in air, and the total flux is controlled by controlling the flux of air at the fifth tube.