Abstract
Precipitated silica was prepared by the hydrolysis of silicon tetrachloride in a dilute solution of soluble glass. In order to identify the optimal synthesis conditions of preparing silica powder with the good dispersivity and uniformity, technical parameters such as volumes of polyethylene glycol(PEG) and anhydrous ethanol, reaction temperature, final solution pH and the concentration of soluble glass were investigated. Products were characterized by scan electron microscopy(SEM),transmission electron microscopy(TEM), infrared spectroscopy(IR), x-ray diffraction(XRD) and laser nano-particle size analyzer. Under the optimal formation condition, amorphous silica particles with average diameters of 284nm and irregular-shaped morphology were obtained.
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