溶胶-凝胶SiO_2在变色薄膜中的应用

Application of sol-gel SiO_2 in optically variable film

变色薄膜是一种非常有用的光学产品。用溶胶 凝胶SiO2 作为变色薄膜中的介质层 (Cr/SiO2 /Al)能明显提高产品的质量和生产效率。本文介绍了溶胶 凝胶SiO2 薄膜的制作方法 ,提出了用酸性催化控制SiO2 溶胶过程 ;用网线辊涂布的方法形成薄膜 ,连同烘烤后处理完成SiO2 凝胶过程。文章还对SiO2

Optically variable film is an optical product that is of great use to prevent counterfeiting of value document or commodity. SiO 2 coating is an important optical medium between both metal coatings i.e. Cr/SiO 2/Al. It can raise the product quality and production efficiency with SiO 2 coating. The coating was deposited by sol gel technology. The silicate dioxide solution was catalyzed by a acid (HCl). The sol gel process was completed in roll coating and thermal treatment. In this paper had discussed optical property and prepare of the coating.