ALPHA-ALUMINIUM OXIDE, USE THEREOF, CORRESPONDING SYNTHESIS METHOD AND APPARATUS Russian patent published in 2015 - IPC C01F7/02 C30B29/20 B01J19/12

Abstract RU 2568710 C2

FIELD: chemistry.

SUBSTANCE: invention can be used in chemical industry. A method for synthesis of alpha-aluminium oxide with purity of 99.99% or higher in the form of spherical particles with a size predominantly equal to 850 mcm or higher, with particle size distribution having a maximum at particle size greater than 850 mcm, with relative viscosity of 50% or higher of the theoretical density includes placing powdered gamma-aluminium oxide (γ) using feeding means (5) onto a plate (7) made of silicon carbide or exposing said powdered gamma-aluminium oxide (γ) to at least one beam (11) of a CO₂ laser (9).

EFFECT: invention enables to increase the density of alpha-aluminium oxide without changing production parameters of monocrystalline sapphire.

25 cl, 2 dwg, 3 ex

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RU 2 568 710 C2

Authors

Bonno Lionel'

Pedzani Mishel'

Dates

2015-11-20—Published

2011-02-10—Filed