FIELD: chemistry.
SUBSTANCE: method includes processing of aluminium hydroxide or of aluminuim oxyhydroxide in presence of water vapour with temperature changing from 20 to 400-450°C with rate 2-150°/hour with further stand at reached temperature during 10-72 hours. Water vapour pressure at temperature 400-450°C is selected in interval 3-40 MPa.
EFFECT: obtaining fine crystalline corundum.
4 ex
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