METHOD FOR PRODUCING INDIVIDUAL nanoscale powders of rare earth oxides

摘要

1. A method of producing powders of individual rare earth oxides, preferably oxides of lanthanides comprising a lanthanide salt precipitation from nitric acid solutions, its separation, washing, drying, heat treatment of the precipitate obtained, characterized in that the precipitation of the lanthanide salt are solid oxalic acid under continuous administration of polyacrylamide in the form of solution with a concentration of 0.005-0.015%. ! 2. A method according to claim 1, characterized in that the heat treatment is obtained the oxalate lanthanides is carried out for 2.0-2.2 hours in the temperature range 380-825 ° C depending on the properties of individual lanthanides. ! 3. A method according to claim 1, characterized in that the precipitation of lead oxalate lanthanides from nitric acid solutions with a concentration of 30-50 g / l of a lanthanide oxide, polyacrylamide administered in an amount of 5.0-10.0 mg per 1.0 kg of lanthanide oxide and drying is carried out at 60-65 ° C to a residual humidity of 5-6%. ! 4. A method according to claim 1, characterized in that the polyacrylamide of the general formula where n ~ 100000! in nonionic form with molecular mass (5 ÷ 7) · 106.