METHOD FOR PRODUCING melkokristallichesky CORUNDUM

摘要

1. A method for producing fine-grained corundum, comprising hydrothermal treatment oxygen-aluminum compounds, characterized in that the treatment is carried out in a dynamic mode as the temperature varies from 20 to 400-450 ° C at a rate in the range 2-150 ° / h followed by heating at a top temperature for 10-72 p.2. A method according to claim 1, characterized in that the pressure of water vapor at the upper temperature (400-450 ° C) is selected in the range of 3-40 MPa.3. A method according to claim 1, characterized in that to aluminum hydroxide or aluminum oxyhydroxide was added doping agent.