Today we 500ml Milk Glass Bottle manufacturers come to summarize Glass Bottle-Sunlight Control Coating Production Technology.
Sunlight control coating production technology Almost all coating methods can produce solar control coated glass. At present, in China's actual production, mainly online CVD process and magnetron sputtering process are mainly used, such as vacuum evaporation method, sol. - A pattern in which the gel coating method is supplemented. Here we mainly introduce the production of siliceous film glass by an online CVD process.184.108.40.206 Production principle The online CVD preparation of siliceous film technology is based on silane and ethylene. The float bath provides a suitable temperature and reduction for the preparation of the siliceous film. Sexual atmosphere. Silane, ethylene, and nitrogen enter the reactor placed above the glass plate in a certain proportion and flow through the surface of the glass plate in a stable laminar flow. At this time, the silane is subjected to the special structure of the reactor and under the condition of reducing atmosphere. When the temperature exceeds 400 ° C, decomposition begins, and the formed product is amorphous silicon. When the temperature exceeds 600 ° C, polycrystalline silicon is formed. Polysilicon deposits on the surface of the glass to form a siliceous film layer, while hydrogen produced by the silane reaction is adsorbed by ethylene to form ethane and methane. These excess gases are discharged together with the excess siliceous powder of brown color from the venting holes on both sides of the reactor. The chemical reaction is as follows: the mixed gas flows to the glass plate in a laminar flow through the reactor and is diffused, adsorbed, and thermally decomposed. And hydrogen desorption, so as to deposit a polysilicon film on the glass plate. 220.127.116.11 On-line coating of siliceous film quality performance In order to improve the film quality of the online silicon-coated film glass, it is necessary to actively improve the wear resistance of the siliceous film layer. Improves the alkali resistance of the siliceous film layer, improves the appearance quality of the film layer, reduces the number of pinholes, and prolongs the coating cycle time.
The wear-resistant coated glass of the siliceous film layer is prone to film peeling after a period of use. In addition to the improper maintenance during use, there is a large possibility that the adhesion strength of the coated glass is problematic. The thickness of the coated glass film layer is generally about 50~80nm. There is an adhesion process between the film layer and the glass surface, and adhesion is the result of surface energy. The adhesion energy is Wab-adhesion energy in the formula; Ya--glass surface energy; surface energy of the siliceous film layer; interface energy between the face-to-face Yab-glass and the siliceous film layer. In order to increase the adhesion energy Wab, only increase Y, or reduce the interface energy Yab. The surface energy of the glass depends directly on the composition of the glass. In order to improve the surface energy of the glass, the aluminum content can be appropriately increased to form an acid center on the surface of the glass plate, and the activity is improved, thereby improving The surface energy of the glass is Ya. From the theory of adhesion energy, it is known that increasing the surface energy of the film layer requires changing the composition of the film layer, which can be achieved by adjusting the process parameters and increasing the amount of ethylene in the mixed gas. Because of its double bond structure, ethylene can break the hydrogen in the product after silane reaction to form C2H6 or CH4. It does not allow hydrogen to deposit on the film layer, thus reducing the presence of residual gas in the film layer. The composition is controlled, thereby increasing the surface energy Ya of the film layer, and reducing the contamination of the surface of the glass plate by the residual gas due to the reduction of hydrogen, avoiding the formation of a "separation layer" of the residual gas on the surface of the glass plate or destroying the continuous film layer. The structure also reduces the interfacial energy Yab between the siliceous film layer and the glass surface. In addition, the interfacial energy Yab is reduced, and the temperature of the reaction zone can be appropriately increased to dissolve the silicon atom after the silane reaction or Ions have a high initial energy on the glass surface, so that silicon atoms or ions are more easily diffused into the glass surface layer to reduce point defects and stress gradients, and enhance the chemical bonding of silicon atoms or ions to the surface layer of the glass with unsaturated bonds. Force and molecular attraction, thereby reducing the interface energy, increasing the viscosity (2) The alkali resistance of the siliceous film layer increases the proportion of ethylene.
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