Preparation and Characterization of Agglomeration-free Sodium Chloride Particles Modified with SiO2 Nano-particles
DAI Meng-yan HU Bi-ru ZHANG Xue-ao WU Wen-jian
Institute of Aerospace Technology & Materials Engineering，National University of Defense Technology Institute of Aerospace Technology & Materials Engineering，National University of Defense Technology Institute of Aerospace Technology & Materials Engineering，National University of Defense Technology
Abstract：By means of adding SiO2 nano-particles and surfactant F127 in the crystallization process of NaCl to modify the surface of crystals, the micrometer NaCl powder was prepared. The SEM analysis shows that SiO2 particles are adsorbed to the surface of NaCl crystals. The size distribution scope is 0.1~15 mm. It is found that the more the SiO2 nano-particles are added, the better the dispersion and fluidity become. The bulk density of NaCl particles is 0.6~0.8 g/cm3. The volumetric flow rate of NaCl particles is 4~6 mL/s. The results imply that such modification could effectively avoid water absorption and hard agglomeration of particles and improve their dispersion and fluidity.
2008, Vol. 8 
