Patent ID: 7749567

Claim:
A process for producing a layered article comprising a substrate and an inorganic particle layer formed thereon, the process comprising: preparing a mixed inorganic particle dispersion comprising a liquid dispersion medium containing inorganic particles (A) and inorganic particles (B), the mixed inorganic particle dispersion being characterized by conditions (1), (2) and (3) provided below; applying the mixed inorganic particle dispersion to a substrate, and removing the liquid dispersion medium from the mixed inorganic particle dispersion applied to form an inorganic particle layer on the substrate; wherein: condition (1): the inorganic particles (A) have an average particle diameter Da of from 1 to 20 nm, the inorganic particles (B) have an average particle diameter Db of from 30 to 300 nm, and Da≦0.15×Db; condition (2): 0.01≦Va/(Va+Vb)≦0.40 and 0.60≦Vb/(Va+Vb)≦0.99, wherein Va and Vb are, respectively, a fraction of the volume of the inorganic particles (A) and a fraction of the volume of the inorganic particles (B) based on the sum of the volumes of the inorganic particles (A) and (B) used for preparing the mixed inorganic particle dispersion liquid; and condition (3): 0.01≦(Wa+Wb)/Wt≦0.20, wherein Wa and Wb are the weight of the inorganic particles (A) and the weight of the inorganic particles (B) in the mixed inorganic particle dispersion liquid, respectively, and Wt is the weight of the mixed inorganic particle dispersion liquid.