FIELD: chemistry.
SUBSTANCE: aluminium α-oxide is reduced in orbital grinder by steel spheres under 5 mm size at acceleration of 20-40 g for 20-40 minutes. Reduced aluminium α-oxide is flushed to remove impurities in turns in hydrochloride with concentration of at least 10 wt % and in alkaline solution with concentration of at least 5 wt %, and then in hydrochloride again. Reduction is preferably performed in inert medium, and impurity flushing is performed along with heating to the temperature of 90°C or less.
EFFECT: obtainment of aluminium α-oxide nanopowder with reduced impurity content.
3 cl, 4 ex
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