METHOD FOR PRODUCING melkokristallichesky CORUNDUM

摘要

1. A method for producing fine-grained corundum, aluminum comprising treating the oxygenate compounds at 350 - 450 ^o C and pressure of water vapor in the presence of an activator ion type, characterized in that the oxygen-containing compounds is a hydroxide or oxide of aluminum, and the activator compound are used the ionic type containing anions selected from the group of nitrates, sulfates, chromates, borates, acetates and hydroxyl ions and water vapor pressure is maintained at 30 - 400 atm.; 2. The method of claim. 1, characterized in that used as an activator potassium hydroxides, sodium, barium, aluminum or alkylammonium.; 3. The method of claim. 1, characterized in that the activator used is sodium chromate or cadmium tetraborate.; 4. The method of claim. 1, characterized in that the activator is used lanthanum nitrate, potassium dichromate or potassium alum.; 5. The method of claim. 1, characterized in that the activator used as barium nitrate, magnesium acetate, copper sulphate or nickel sulphate.; 6. The method of claim. 1, characterized in that the activator is used chromium nitrate, ammonium dichromate, or boric acid.