Preparation And Properties Of Tin Oxide Low-E Film Glass

SnO₂:Sb+F film was deposited on large-area glass by spray pyrolysis using precursor solution prepared by dissolving SnCl₂·2H ₂O in alcohol with SbCl₃ and C₂HO₂F₃ as dopants. Phase structure and surface morphology of prepared film were characterized by XRD and SEM, respectively. Combined with spraying theory and practical experiences obtained from experiments, the film-depositing mechanism was discussed in detail. The relationship between preparing process, film microstructure and the resulted properties was analyzed. Results indicate that:1. In the process of depositing process parameters influence the properties of films by influencing the deposition mechanism. The mechanism was mainly determined by three factors: drop size, size distribution and substrate temperature. Namely during the depositing, they influence the evaporation behavior of the drop, emergence of surface defects and film growth.2. When the main elements in the solution were controlled at Sn:Sb:F=1:0.04:0.5, the optimal process parameters are: 550℃ of substrate temperature, 1.1 bar of hydraulic pressure, 3.5 bar of air pressure, 390mm of distance from nozzle to substrate, 50% of exhaust section and 2cm/s of the moving velocity for nozzle.3. Under the optimal process parameters, the standard samples exhibit tetrahedral rutile structure with thickness of approximately 288nm. The films were dense with pyramid-shaped particles, which were randomly distributed with diameter of 60-80nm.4. Based on National standards, the properties of the as-prepared films were measured and calculated. The sheet resistance of the film reached 25 Ω/â–¡ with resistivity of 7.5×10^-4Ω·cm, the average transmittance of visible light is 77.5%, the emission is 0.204, U =3.9W/m²Â· K, SHGC=0.703, SC=0.813.Since the large-area Low-E glass prepared by this simple process has passed the test of the National Quality Supervising and Inspection Center, our study, therefore, was proved to has achieved the goal of the stage for preindustrial experiments. On the next step, we focused on study for stage of industrial experiments, so that as to develop the production of on-line Low-E glass with hundred-percent patent property.