Preparation,Coating And Characterization Of Porous Glass

With the continuous development of coated glass industry,the demand for coated glass will be higher and higher, the industry standard is more and more stringent,therefore,the development of superior performance coated glass has become a hot spot in today's research. In order to improve the visible light transmittance of coated glass and improve the film binding capacity of coated glass, two new type of plating substrates were developed and coated,and the performance of these two kinds of new coated glass was studied.A glass with a honeycomb surface was prepared by a reverse micellar solution etching technology. The honeycomb surface might reduce the light reflection and increase the average transmittance of visible light by nearly 7%. The chemical etching technology is environment friendly due to the avoidance of the use of HF or fluosilicate. In order to improve visible light transmittance of the coated glass, the glass was used as a substrate for coating. CeO2 / TiO2 films were deposited on the honeycomb surface glass and raw glass by radio frequency magnetron sputtering. A series of optimization experiments were carried out to obtain a coated glass with a high visible transmittance and a high TV cut-off. The samples were characterized by UV-Vis spectrophotometer, SEM, XRD and XPS. When the UV cut-off ratios were 99% for both the honeycomb surface glass and the raw glass, the average transmittance of visible was 85% for the coated honeycomb surface glass, and only 79% for the coated raw glass under the same coating conditions. In addition,the porous structure on the glass surface also improved the contact area between the film and the substrate. Therefore, the binding force between film and substrate was increased by about 2 times.In order to improve the adhesion between the film and the substrate, Herein, we proposed a reverse micelle solution etching technology to generate sphere segment shaped pits on glass surface. The opening diameter of the pits is micrometer-sized. to improve the substrate roughness, thereby increasing the adhesion of film to glass. As deposition is carried out on the etched surface, the coating materials would be embedded into these sphere segment shaped pits and result in a wavy 3D film. Since the contact surface with the etched glass is greatly increased compared to the coating on the flat glass,the adhesion of film to glass might be substantially enhanced.Etching technology increases the glass substrate roughness of about 9 to 20 times,the adhesion of film to glass increased by 3 to 4 times,,not only enhanced the adhesion of the membrane and the substrate, but also strengthen the interaction between films in multilayer coatings. Etching of the deposited glass produces a more dense film. Meanwhile, the hardness and Young's modules of films on the etched glass were also increased compared to those films on the glass without etching.