METHOD OF PRODUCING LITHIUM ZIRCONATE POWDER Russian patent published in 2012 - IPC C01G25/00 C04B35/626 

FIELD: chemistry.

SUBSTANCE: method involves preparing a mixture of aqueous solutions of zirconium and lithium nitrates, dehydration, annealing and grinding the obtained product, where zirconium (IV) hydroxide carbonate of formula Zr(OH)₂CO₃·5.5H₂O is first mixed with nitric acid in excess of 0.04-0.06 mole compared to the stoichiometrically required amount for neutralising zirconium (IV) hydroxide carbonate, annealing is carried out by evaporation at temperature 140-150°C, first until achieving ratio of the initial volume of the mixture to the evaporated volume equal to 2:1, and then in the presence of citric acid, and the annealing process is carried out in four steps: first at temperature 280-300°C, then at temperature 400-420°C, then at temperature 600-620°C, after which the product is ground and then annealed at temperature 760-780°C.

EFFECT: compared to existing techniques, the method is simple and does not require use of toxic reagents.

2 ex