METHOD OF MAKING AMORPHOUS SILICON DIOXIDE NANOPOWDER Russian patent published in 2013 - IPC B22F9/20 C01B33/18 B82Y30/00 

FIELD: process engineering.

SUBSTANCE: invention relates to powder metallurgy, particularly, to production of silicon dioxide nanopowders. To simplify production of silicon dioxide nanopowders and to clean obtained powder from unsublimated impurities minced silicon dioxide is loaded into reaction crucible top section while carbonic reducing agent is fed into crucible bottom section separated form said top section by baffle. Silicon dioxide is reduced by blowing with water vapors at feeding them into reaction crucible bottom section at 1150-1250°C. Reaction products are discharged via reaction crucible top section with deposition of reduced amorphous silicon dioxide nanopowder.

EFFECT: simplified process.

1 dwg, 3 ex