A METHOD FOR REDUCING NANO-SILICA BY MOLTEN-SALT-MEDIATED MAGNESIOTHERMIC REDUCTION

摘要

#$%^&*AU2020101794A420200917.pdf#####Abstract The invention discloses a method for reducing nano-silica by molten-salt-mediated magnesiothermic reduction, which comprises the following steps: (1) weighing nano-silica, magnesium powder, sodium chloride and potassium chloride, respectively, grinding and mixing uniformly to obtain product A; (2) placing product A in a graphite boat, then placing the graphite boat in a tubular furnace and heating, and taking out the substance on the graphite boat after cooling to obtain product B; (3) pouring product B into deionized water for rinsing, and then pouring it into hydrochloric acid solution for rinsing, followed by successively washing with water and ethanol, and performing suction filtration to obtain product C; and (4) drying product C to obtain nanometer silicon. The invention has the beneficial effects of high reduction yield, high purity, simple process and suitability for large-scale production. 101/2 A ASi -10 0 10 20 30 40 50 60 70 80 90 100 20(degree) Fig.1 200 nm EHIT =20.00 kV Signal A =SE2 Date :26 Apr 2019 WD 8.6 mm Mag = 40.00 K X Time :5:32:02 Fig. 2