ALUMINIUM ?-OXIDE FOR OBTAINING SAPPHIRE MONOCRYSTAL AND METHOD OF OBTAINING THEREOF

摘要

FIELD: chemistry.SUBSTANCE: inventions can be used in chemical and electronic industry. Method of obtaining aluminium ?-oxide for obtaining sapphire monocrystal includes stage at which 100 weight parts of aluminium (I) ?-oxide and 25-235 weight parts of aluminium (II) ?-oxide are mixed. Aluminium (I) ?-oxide has specific surface area from 0.1 to 5 m/g and volume density 1.5 g/cmor more. Aluminium (II) ?-oxide is formed from sintered particles and has specific surface area 1 m/g or less and relative density 85% or higher, and each of sintered particles has volume 0.01 cmor more.EFFECT: inventions make it possible to reduce quantity of adsorbed water, reduce crucible oxidation and increase efficiency of monocrystalline sapphire obtaining.6 cl, 3 ex