METHOD FOR PREPARING HIGH-PURITY NANO-TIN DIOXIDE SPHERICAL POWDER

摘要

A method for preparing high-purity nano-tin dioxide spherical powder, comprising the following steps: adding 5-15 parts of high-purity tin metal particles into 40-50 parts of ammonium nitrate solution; then adding an AR-grade nitric acid solution into same until the tin particles are dissolved, thereby obtaining a light yellow slurry; leaching after 20 to 24 h of aging; washing 3 to 5 times with deionized water; drying at 70 to 80°C for 5-7 h; then performing calcination at 240 to 260°C for 2-4 h; and cooling to room temperature, thereby obtaining the high-purity nano-tin dioxide spherical powder. All raw materials are counted in parts by weight. The method is simple, according to which nano-tin dioxide spherical powder with a small particle size, a narrow distribution range, and high purity can be obtained, and thus is suitable for industrial production.