PROBLEM TO BE SOLVED: To provide a surface modification zirconia particulate fluid dispersion having a high refractive index, high transparency and high handling ability, and a producing method thereof.SOLUTION: There is provided a zirconia particulate fluid dispersion containing an organic acid comprising an organic acid, zirconia particulates with a mean dispersion particle size of 1-20 nm, and a dispersant, wherein there is 0.001-0.05 g organic acid per 1 msurface area of zirconia particulates; and a production method thereof.SELECTED DRAWING: None
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