DEVELOPMENT OF COMPLEX COMPOSITE MATERIALS BASED ON MgO OBTAINED BY THE COLLOIDAL METHOD

Technological approaches to the formation of pure and composite materials with the composition MgO : SiO2 : CaO : BaO, obtained using colloidal methods, are considered. Structural transformations occurring in the synthesized xerogel blanks during their heat treatment in air at temperatures ranging from 400 to 600°C were studied using scanning electron microscopy. At 400 °C, the size distribution of primary grains ranges from 37 to 56 nm, at 500 °C – from 33 to 74 nm, and at 600 °C – from 40 to 64 nm. X-ray phase analysis showed that the formed nanocomposite has a crystalline structure with a uniform distribution of impurities. EDX studies confirmed the calculated initial composition of the obtained material. Disks with diameters of 13, 20, and 40 mm were formed from the obtained composite for experiments on water purification from petroleum product contamination