Performance Of Low-E Glass Vacuum Technology And Vehicle Preparation

The vacuum plate glass is a new transparent and energy-saving material with excellent insulation and soundproof performance in the21st century. Low-E glass has excellent low radiation function, and its average infrared reflectivity was larger than60%. Based on the experimental research of the automotive Low-E vacuum glass, it will play a huge role in the field of automobile energy-saving.Based on the experimental research of the large industrialization vacuum glass and vacuum magnetron sputtering coating double silver Low-E glass, the technological parameter of the automotive Low-E vacuum glass was studied in this paper. The automotive Low-E vacuum glass samples were successful developed for laboratory research, and provided early technical basis for its industrialization and generalization.By analyzing the simulation of automotive Low-E vacuum glass heat sealing with ANSYS, the numerical solution of stress and residual stress under vacuum in the process of automotive Low-E vacuum glass heat sealing has been got, which provided prophase theoretical support and analysis for automotive Low-E vacuum glass heat sealing.The automotive Low-E vacuum glass was prepared on the basis of the vacuum magnetron sputtering coating double silver Low-E glass and through improved technological preparation. Through the testing instruments of SEM, EDS, XRD, optical property and nanoindentation, the effect of Low-E film’s chemical composition, morphology, optical and mechanical properties were researched under vacuum conditions with different temperature from420℃to520℃, and the appropriate parameters such as temperature were obtained. The automotive Low-E vacuum glass was successfully prepared on this basis, the sealing property was researched through the instruments above, and the influence of high-temperature solder sealing on Low-E film was obtained.(1) By analyzing the heat insulation’s performance of automotive Low-E vacuum glass, its heat insulation performance was excellent. The largest heat transmission area which was fixed by the window frame was within the scope the15mm glass edge.(2) By analyzing the simulation of the sealing process in high-temperture of automotive Low-E vaccum glass with ANSYS,it find that the stress of glass is very small in high-temperture,the glass is not damage,the stress of stilts is337.5MPa,the residual stress is nearly zero of the automotive Low-E vaccum glass under the vacuum state.(3) The surface qualities of Low-E film were effectively improved by high-temperature solder sealing in a certain temperature range, the Crystallization of spots through the process of film build were refining and the grain density was enhanced. The overall performance of Low-E film was optimized with the improvement of sealing temperature from the range of420℃to500℃, its reflectivity even exceed the standard accessories (gem accessories) especially for a particular wavelength of infrared, but the relative optimization rate was low. The film layer would flaw at the representative of Oxidation spot and microscopic crack while the sealing temperature over500℃, and the overall performance would decrease. So the sealing temperature finally set480℃.(4) Low-E film’s HIT and EIT had certain fluctuations with the improvement of sealing temperature through nanoindentation, but the difference was little. The main reason was that the dual effects of annealing and optimization on the vacuum plate glass cancel each other out during the process of high-temperature sealing, but the bonding strength between film and glass was distinctly increased.(5) The automotive Low-E vacuum glass sealing layer,under the sealing temperature of480℃, was studied by microstructure and EDS. The results showed that the solder was completely molted, the sealing layer was excellent stable and the hard solder points was uniformly distributed on the soft substrate in the sealing layer.(6) The phase was mainly of PbTiO3and NaNbO3after high-temperature sealing instead of PbTiO3before by XRD, and the sealing strength, fatigue strength and chemical stability of vacuum glass sealing were improved...