METHOD OF PRODUCING NANO- AND MICROSTRUCTURED HYBRID SOLS Russian patent published in 2015 - IPC C01B33/14 B82B3/00 B82Y30/00 

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.

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