METHOD OF OBTAINING FINE CRYSTALLINE CORUNDUM

FIELD: chemistry. ^ SUBSTANCE: method includes processing of aluminium hydroxide or of aluminuim oxyhydroxide in presence of water vapour with temperature changing from 20 to 400-450C with rate 2-150/hour with further stand at reached temperature during 10-72 hours. Water vapour pressure at temperat...

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Hauptverfasser:	IVAKIN JURIJ DMITRIEVICH, PANASJUK GEORGIJ PAVLOVICH, TORBIN SERGEJ NIKOLAEVICH, DANCHEVSKAJA MARINA NIKOLAEVNA
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	CHEMISTRY COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS INORGANIC CHEMISTRY METALLURGY
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Beschreibung
Zusammenfassung:	FIELD: chemistry. ^ SUBSTANCE: method includes processing of aluminium hydroxide or of aluminuim oxyhydroxide in presence of water vapour with temperature changing from 20 to 400-450C with rate 2-150/hour with further stand at reached temperature during 10-72 hours. Water vapour pressure at temperature 400-450C is selected in interval 3-40 MPa. ^ EFFECT: obtaining fine crystalline corundum. ^ 4 ex