METHOD OF OBTAINING PARTICLES OF DOPED METAL OXIDES Russian patent published in 2010 - IPC C01B13/14 C23C18/12 C09C3/06 

FIELD: chemistry.

SUBSTANCE: invention can be used in inorganic chemistry. To obtain particles of doped metal oxides, an oxidisable and/or hydrolysable metal compound which is a dopant, together with an atomising gas, is atomised into a stream of particles of metal oxides in a carrier gas in a first reaction zone. The mass flow of metal oxide particles and mass flow of the dopant is chosen such that said particles contain from 10 parts/million to 10 wt % of the doping component. The amount of dopant is calculated in terms of the corresponding oxide. Temperature of the first reaction zone is lower than boiling point of the dopant, lower than the temperature of the reaction for converting the dopant to the corresponding oxide and ranges from 200 to 700 °C. Further, the stream from the first reaction zone as well as an optional amount of oxygen and/or steam which is at least sufficient for complete conversion of the dopant, are fed into the second reaction zone. Temperature in the second reaction zone is lower than boiling point of the dopant and ranges from 300 to 2000°C, preferably from 500 to 1000 °C. The reaction mixture is cooled or left to cool. Particles of doped metal oxides are then separated from gaseous substances.

EFFECT: invention enables to obtain metal oxides which are only doped on the surface.

11 cl, 1 dwg, 5 tbl, 5 ex