Elaboration et caractérisation d'un revetement synthétisé par voie sol/ gel

Abstract

Abstract: Transparent materials such as glasses attract considerable interest in various fields due to their unique and versatile properties. The surface quality of these materials is crucial because it influences their mechanical and optical properties, due to their contact with the environment. In our study, different SiO2-Al2O3 coatings were prepared using TEOS, MTES as silica source, and aluminum nitrate as alumina precursor, different percentages of alumina were studied. Then the coatings were deposited by dip-drawing and treated at 500 °C. SiO2-Al2O3 sols were treated at (500, 600, 700 °C). The coatings were characterized optically by UV-VIS, by FTIR, and mechanically by micro indentation. Transparent and homogeneous coatings were obtained. The results show that SiO2-Al2O3 coatings can increase the optical transmission ranging from 90.4 for raw glass to more than 94% after coatings. The FTIR results provide a good understanding of the effect of processing temperatures on the hydrolysis and condensation reaction.