Obtaining antireflecting coatings from mesoporous silicon dioxide on silicate glass at lowered temperatures of baking of gel

Abstract

Silicon dioxide sol with oligoethers can be used to obtain antireflecting coatings on silicate glass at various baking temperatures of the coating: 400, 300, and 200°C. At an optimal concentration of 4.0 mass % of oligoether based on PPG-725 in a sol, the maximum light transmission of 99.7%, and the refractive index of the nanoporous coating of 1.23 do not depend on the baking temperature in the range from 200 to 400°C. Silicon dioxide sol with a 4.0 mass % of ALM-10 give a maximum light transmission of 99.7% and a refractive index of the nanoporous coating of 1.23 at a baking temperature of 300–400°C. A maximum light transmission of the glass with a coating of 98.7% and the refractive index of 1.27 at an optimal concentration of 8.0 mass % of oligoether based on PEG-200 were obtained at baking temperatures of 300–400°C.