The Research On Optical Properties And Applications Of Online Low-E Glass

Low emissivity coated glass is also known as Low-E glass. It has high infrared reflectivity at wavelength of 2.5μm-25μm, and a high transmittance in visible range. It is a kind of excellent environmentally friendly energy glass. With the study on Low-E glass, people had known its material structure, optical properties, and its potential applications are also being slowly excavated. The purpose of this work is to develop the manufacture technology, production capability and the application of Low-E glass. Based on the optical characteristics, the optical constants of Low-E glass and the optical mechanism were studied. Then, the surface plasmon resonance properties of Low-E glass and low emissivity glass with self-cleaning properties were studied, respectively. This thesis includes five parts.In the first part, we introduce the concept of Low-E glass, low emissivity principle, the kinds of Low-E glass and production processes, etc. Then,the current study situation were discussed in detail. Finally, our research topic and main research contents are given.In the second part, the Lorentz two-oscillator model and Cauchy model were used to characterize the dispersion characteristics of functional layer and transition layer of online Low-E glass. The theoretical model measuring the optical constants of Low-E glass were established by ellipsometry. Then, the optical constants of functional layer and transition layer of online Low-E glass in visible-near infrared region were analyzed. The constants of each layer of Low-E glass were obtained by fitting the ellipsometric data. Moreover, the fitting results were confirmed by experiment.In the third part, we found that the optical constants of functional layer of Low-E glass were similar to the optical constants of metal by the study of the second chapter. It can be used as the material to excite the surface plasmon resonance, theoretically. We designed a simulation model. Then, the transfer matrix method was used to simulate the spectra. It can be found that functional layer of Low-E glass can excite surface plasmon resonance. Compared to metal, its excitation wavelength is different.In the fourth part, TiO2 films were coated on the surface of Low-E glass, using the magnetron sputtering method. Low-E glasses with self-cleaning properties were designed. The experimental parameters were optimized. Then, the low-emissivity properties and self-cleaning properties were characterized.In the fifth part, the conclusions and potentially developments of the work were given.In a word, we systematically discussed the optical mechanism and application prospect of Low-E glass. And this work will offer the certain meaning for the development and applications.