Preparation and Characterization of Magnesium Silicate

Magnesium silicate was successfully prepared by a hydrothermal-sacrifice template process in a mixed solvent system. The mixed solvents were made of the silicon dioxide template, magnesium chloride as magnesium source, ammonia and ammonium chloride. The influences of synthesis conditions such as the reaction time and temperature, the morphology of silicon dioxide and the concentration of MgCl₂ were studied. The products were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and specific surface area analyzer. At optimized conditions, the synthesized magnesium silicate has the BET surface area up to 642.72 m²/g.