FIELD: chemical industry; methods of production the nanoporous ultra-fine powders and sol-gel made out of alpha aluminum oxide.
SUBSTANCE: the invention is pertaining to creation of the nanoparticles from alpha aluminum oxide, to the method of their preparation and to the method of their polishing. The powder from alpha aluminum oxide contains the particles from alpha aluminum oxide, at that about 99 % of these particles have the dimension roughly from 10 up to 100 nanometers, at that about 99 % of the particles have the distribution with the average dimension about 10 nanometers. The method of production of the particles from alpha aluminum oxide having the dimension roughly from 10 up to 100 nanometers includes the following operations: usage of the gel, which contains at least one precursor of the aluminum oxide and the flock of inoculation particles from alpha aluminum oxide, at that the inoculation particles from alpha aluminum oxide have the average dimension roughly less than 100 nanometers; drying of the gel and kilning of the dry gel at the temperature of roughly from 750°С up to 950°С allowing to originate formation of the alpha aluminum oxide without grow body of the particles sizes to receive the particles from alpha aluminum oxide, having the average dimension roughly less than 100 nanometers and distribution with the average dimension about 10 nanometers. The produced powder is used in the form of the suspension use in the method of polishing of the base by the suspension application on the separation surface between the base and the polishing tool. The invention allows to produce the fine powders of the alpha aluminum oxide, which may be used in the polishing process.
EFFECT: the invention ensures production of the fine powders of the alpha aluminum oxide, which may be used in the polishing process.
32 cl, 2 dwg, 4 ex
