METHOD OF PRODUCING POWDER OF SIMPLE OR COMPLEX METAL OXIDE Russian patent published in 2020 - IPC C01B13/18 B22F9/02 B22F9/24 C04B35/111 C04B35/486 C04B35/626 C01F7/02 C01F17/32 C01G25/02 

FIELD: chemistry.

SUBSTANCE: invention relates to chemical engineering and can be used to produce powders of simple and complex metal oxides for production of thermo-barrier coatings and special ceramics. Method of producing a powder of a simple or complex metal oxide involves preparing a nitrate starting solution of at least one corresponding metal, a chelating reducing agent and a flame retardant, heating the mixture to temperature of self-propagating high-temperature synthesis (SHS), holding until completion of combustion with subsequent annealing, wherein for obtaining yttrium oxide-stabilized zirconium oxide YSZ-5, zirconium and yttrium nitrates and glycine are used as a reducing agent in stoichiometric ratio, and to obtain aluminum oxide Al₂O₃ – aluminum nitrate and reducing agent – carbamide in ratio of 10 % greater than stoichiometry, wherein the flame retardant used is at least one oxide of the corresponding metal in amount of 50÷70 wt% of design end product weight.

EFFECT: invention provides increased particle size of the obtained product, as well as possibility of scaling due to reduced volume of the obtained product and prevention of material ejection outside the reactor.

1 cl, 4 ex