METHOD FOR OBTAINING CONCENTRATED HYDROSOL OF ZIRCONIUM DIOXIDE Russian patent published in 2018 - IPC C01G25/02 C01F17/00 B01J13/00 

FIELD: materials science.

SUBSTANCE: invention relates to material engineering and can be used in production of structural and building elements in machine building, functional heat-shielding coatings, in medicine for production of implants in bone tissue, filling material, in production of ceramic fuel cells, films for production of miniature electromechanical systems, electronic and optical instruments, sensors and energy converters, cutting tools, catalysts. To obtain concentrated hydrosol of zirconium of composition (1-x)ZrO₂/xY₂O₃, where x=0.03–0.08 as the starting materials for the hydrolysis, filtered solutions of zirconium oxychloride and yttrium nitrate are used. Hydrolysis of the salts is carried out with an aqueous solution of ammonia of concentration 0.1224–2.0601 mol/l at room temperature and intensive stirring at pH≤1.4.

EFFECT: invention makes it possible to obtain hydrosols that retain aggregative and sedimentation resistance for 1 year, with exception of the stage of gel peptization.

1 cl, 1 tbl, 14 ex