Study On Preparation Of SnO₂ Coated Low-Emission Glass For Building Doors And Windows

With the continuous development of society,China's urbanization construction is also continuously progressing,and the use of corresponding glass has become more and more important in the development of buildings.However,for ordinary glass,it has a relatively high transmittance to sunlight,and at the same time,the reflectance of infrared rays is relatively low,so the thermal insulation effect in the building interior is not ideal.The effective use of Low-E glass by doors and windows in buildings can not only optimize the optical performance,but also effectively improve the indoor temperature,improve the comfort of the indoor crowd,and also play a role in energy conservation and environmental protection.In the development process of the past two decades,the manufacturing technology of low-radiation glass for building doors and windows has gradually made great progress.In order to improve the performance,the improvement of the glass insulation film preparation method has become a new building door and window glass technology.Important direction of development.Based on the requirements of light transmittance and heat insulation performance of glass films for building doors and windows,this paper uses spray pyrolysis,electrostatic spraying,spin coating and other process technologies to prepare SnO₂-coated Low-Emission films on ordinary glass substrates.Appropriate preparation parameters were obtained through variable temperature analysis experiments such as temperature,spraying method,and spraying time.The visible-light transmittance and infrared-light transmittance of the film were measured using UV-visible spectrophotometers and self-made thermal insulation devices.Performance such as temperature,morphology,and thermal insulation temperature difference.The SnO₂ Low-Emission film was prepared by electrostatic spraying and spray pyrolysis respectively.The comparison of the sample performance of the two preparation methods shows that the optical properties of the samples prepared by spray pyrolysis are better,and the surface of the sample film is smoother.Chemical properties are more stable.The effect of substrate temperature on the properties of SnO₂-coated Low-Emissivity films was investigated.The results show that the temperature of the glass substrate surface has a significant effect on the performance of the Low-Emissivity film during the coating process.During the spraying process,when the surface temperature of the glass plate substrate is high,the deposition rate of the atomizing solution can be effectively increased.But at the same time,when the surface temperature of the glass substrate is high,the diffusion rate of metal ions after atomization will also be increased,which will have a significant impact on the properties of the sprayed Low-Emission film.The square resistance of the film gradually decreases with the increase of the substrate temperature.When the temperature reaches 450 ?,the square resistance reaches the minimum,and when the temperature is continuously increased,the square resistance of the film is almost unchanged,stable between 200-300?.By comparison with the standard XRD pattern,it can be seen that when the diffraction angles are 26.37°?33.49°?37.52°? 52.28°,it can be found that the XRD diffraction pattern of the film has several extremely obvious diffraction peaks.It can be seen that the SnO₂ thin film sample is a tetragonal SnO₂ thin film,and the structure of the SnO₂ thin film has not changed significantly.The surface thin film has good crystallinity.The optical properties of SnO₂ Low-Emission films were analyzed.It can be seen that the light transmittance of the film decreases continuously with time.The growth rate of the thin film light transmittance curve shows an increasing trend when the spraying time reaches5 minutes.When the spraying time reaches 10 min and 15 min,the light transmittance shows a state of increasing first and then approaching relaxation.After testing and calculation,it can be known that the maximum visible light transmittance of the coated SnO₂ coated glass is72.41%.Compared with the glass before coating,the visible light transmittance of the glass after coating decreases by about 8%.The chemical properties of thin-film glass were tested.By analyzing the visible light transmittance curve before and after corrosion of the sample,the visible light transmittance before and after the corrosion of the sample has no obvious band,and the transmittance is stable at about 70%,which indicates that the SnO₂ film has a certain chemical stability.