METHOD FOR PRODUCING SUPERFINE NANOCRYSTALLINE LEAD TUNGSTATE Russian patent published in 2016 - IPC C30B29/32 C01G41/00 C01G21/00 B82B3/00 B82Y30/00 B82Y40/00 

FIELD: nanotechnology.

SUBSTANCE: invention relates to production of nanocrystalline powders of chemical compounds and can be used for production of radiation shields, photocatalytic and scintillation materials. Superfine nanocrystalline lead tungstate (PbWO₄) is prepared by a chemical reaction between a solution of lead acetate and sodium tungstate with 5-20 % solution of lead acetate Pb(CH₃COO)₂·3H₂O, prepared by dissolving lead acetate in a mixture of water and ethanol or acetone at a ratio of 1.5-1:1, dispersed as fine droplets, added to 2.5-10 % aqueous solution of sodium tungstate Na₂WO₄·2H₂O on its surface with its continuous stirring. Disclosed method has a higher rate of yield and smaller dimensions of required equipment, due to lower consumption of solvents in preparation of solutions (5-10 times). Method also eliminates need for additional substances - dispersants, having limited application in industry.

EFFECT: technical result of invention is to obtain nanocrystalline PbWO₄, having average particle size of about 50 nm.

1 cl, 2 dwg