METHOD OF PRODUCING NANOPOWDERS OF COMPOUNDS BASED ON TITANIUM, LEAD AND ZIRCONIUM OXIDES Russian patent published in 2010 - IPC C04B35/491 C04B35/626 B82B3/00 

FIELD: chemistry.

SUBSTANCE: method can be used in chemical industry to produce nanopowders of composite materials based on lead, titanium and zirconium oxides for making ceramics with special properties. A solution of oxalic acid and titanium dioxide in form of finely dispersed powder are added to an alcohol solution of the initial mixture of salts of separate components to obtain a mixture of oxalates of the separate components which is then subjected to thermal synthesis. The synthesis process is carried out in two steps at temperature of 320-370°C at the first step, and not above 780°C at the second step, with heating rate of 5-12 degrees/minute with maintenance of the given temperature at each step and cooling the reaction mass after each step in the same reaction volume. The method allows for obtaining powder of compounds based on titanium, lead and zirconium oxides with a 100% perovskite structure and coarseness of 5.5-6.5 nm.

EFFECT: reduced energy consumption of the process and simplification of the process flow diagram, excluding preliminary grinding of initial separate oxides.

5 cl, 2 ex