Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 22, Issue 1-2, Pages 139-150Publisher
SPRINGER
DOI: 10.1023/A:1011232807842
Keywords
sol-gel; antireflective multilayers; low temperature processing; TiO2 films
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TiO2 sol-gel thin films have attracted a large attention for applications which require high refractive index transparent layers. In this work, sol-gel TiO2 layers were prepared by Aerosol-gel deposition followed by a thermal treatment procedure in air. Depending on the experimental conditions, abrasion resistant and high refractive index layers could be obtained after post-treatment at only 110 degreesC. In this paper, the experimental parameters which allow the preparation of functional TiO2 sol-gel layers at such low temperature are discussed. It is concluded that the preparation of high refractive index and mechanically resistant TiO2 layers can be interpreted in terms of competition between polycondensation and densification mechanisms. This result allows to envisage the sol-gel processing at low temperature of multilayer antireflective coatings.
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