New antireflection coatings on silicate glass, deposited from a silicon dioxide sol containing a nonionogenic surfactant and an oligoether based on ethylene oxide

On the hardness of transparent coatings deposited on silicate glass from silicon dioxide sols with addition of titanium and zirconium oxides

“…For example, thin (80-200 nm) transparent fi lms of mesoporous silicon dioxide with low refractive index (1.20-1.23) on silicate glass or optical quartz exhibit a good antirefl ection effect: the maximum optical transmittance of a sample without an antirefl ection coating in the visible spectral range 400-800 nm is 91.0-92.0%, and that of a sample with single-layer double-side coating is 99.0-99.9% [6]. It has been shown recently [7][8][9] that addition to a silicon dioxide sol of organic compounds that are not surfactants, namely, organic acids, organic acid derivatives, synthetic carbon-chain polymers, statistical copolymers, and oligomers based on ethylene oxide or propylene oxide make it possible to obtain fi lm coatings on glass and quartz with a pronounced antirefl ection effect.…”