METHOD OF PRODUCING NANO- AND MICROSTRUCTURED HYBRID SOLS

摘要

FIELD: chemistry.SUBSTANCE: hybrid sol, containing nano- and microparticles, is obtained by mixing a silica sol containing nano- and microparticles and a refractory metal sol containing microparticles in a ratio where the refractory metal oxide in the hybrid sol ranges from 0.1 to 20 wt %. The nano-micro silica sol is formed by hydrolytic polycondensation of tetraethoxysilane at temperature of 20-40°C; aqueous ammonia solution is added to the tetraethoxysilane at a rate of 1-10 ml/min, followed by holding for 5-24 hours and concentrating the obtained sol to solid phase content of 25-40 wt %. The refractory metal oxide sol is obtained via hydrolytic condensation by adding an alcohol solution of refractory metal alkoxides in a water-alcohol solution at a rate of 1-10 ml/min, followed by holding for 5-24 hours and concentrating the obtained sol to solid phase content of not less than 3 wt %.EFFECT: invention enables to obtain nano- and microstructured hybrid sols based on tetraalkoxysilane and hydrolysed refractory metal alkoxides.2 ex