METHOD FOR OBTAINING DENSE STRUCTURAL ZIRCONIUM CERAMICS FROM BADDELEYITE Russian patent published in 2022 - IPC C04B35/486 B82Y40/00 

FIELD: ceramics production.

SUBSTANCE: invention relates to the production of dense structural ceramics from zirconium dioxide. A molding nanopowder with a particle size of zirconium dioxide less than 20 nm, containing (wt.%): calcium oxide 2-5 and baddeleyite concentrate 98-95, is obtained after joint grinding of the components in an aqueous medium for 5 hours using beads from stabilized zirconium dioxide with a diameter of 1.5 mm at a ratio of the mass of the composition of powders of the initial components to the mass of distilled water 1:3, and to the mass of grinding bodies - 1:10 and drying the grinding product at a temperature of 80-90°C for a day at atmospheric pressure. The powder is pressed and sintered at a temperature of 1200-1300°C. In terms of hardness and Young's modulus, zirconium ceramics obtained from the indicated powder containing 2 wt.% CaO corresponds to engineering ceramics from synthetic zirconium dioxide stabilized with yttrium oxide, and surpasses it in terms of crack resistance.

EFFECT: invention allows to produce dense structural ceramics from zirconium dioxide.

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