Method for producing zirconia colloids
AssigneesEssilor International (Compagnie Generale d'Optique), Shanghai University
InventorsLiyi Shi, Stephanie Pega, Xavier Panchout, Yves Leclaire, Shuai Yuan, Zhuyi Wang, Yin Zhao, Jian Zhao
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Abstract
The present invention pertains to a method for producing a colloidal suspension of zirconia particles, comprising the following successive steps: a) subjecting a mixture of zirconium oxychloride and an alkali metal halide in an aqueous solvent to hydrothermal treatment at a temperature above 150° C., so as to obtain a suspension in the form of a two-phase mixture comprising a slurry and a supernatant, b) without first peptizing it, desalting said suspension so as to form a colloidal suspension of zirconia.
Claims16
A method for producing a colloidal suspension of zirconia particles, comprising the following successive steps:
- (a) subjecting a mixture of zirconium oxychloride and an alkali metal halide AX in an aqueous solvent to hydrothermal treatment at a temperature above 150° C., so as to obtain a suspension in the form of a two-phase mixture comprising a slurry and a supernatant, and
- (b) desalting said suspension, without first peptizing said suspension, so as to form a colloidal suspension of zirconia.
Dependencies are inferred from the claim text.