[China Glass Net] The development of the double silver film system is to obtain a set of double silver film products with stable process, excellent optical parameters, good mechanical properties and good oxidation resistance. According to the actual production experience, the author believes that the following problems should be noted in the development process and actual production process of the Double Silver Low-E film system:
(1) Determine reasonable target parameters. The radiance of double silver Low-E can generally be 0.05 or even lower, and the surface resistance can generally be less than 3 Ω. This parameter mainly depends on the thickness of the Ag layer; the transmittance of double silver Low-E coated glass is generally Between 50% and 70%; considering the color after installation to the curtain wall, the glass surface color ag of the double silver Low-E coated glass is generally between 0 and -5, and the glass surface bg is generally between -5 and -10. between. The important principle for selecting the appropriate target parameters is to be both beneficial to the process and to give the architect and the owner a comfortable visual effect in future use.
(2) The overall structure design of the membrane layer is reasonable. The film structure is the core technical index of double silver Low-E coated glass. Only when the membrane structure is designed reasonably, can the coated glass with excellent physical and chemical properties and stable performance be developed. In addition, the ratio and total amount of process gas and reaction gas of different targets may affect process stability, film stress, film acid resistance, film wear resistance, production efficiency, and production energy conservation.
(3) Pay attention to the influence of the thickness and uniformity of the single layer film on the overall performance of the double silver Low-E film structure. The number of double-silver Low-E films is more than that of single-silver Low-E, and the sensitivity of each film layer to the physical and chemical properties of the final product is different. In addition, in the double silver Low-E, the thickness uniformity of the single layer film has a significant influence on the color uniformity of the final product, so the thickness uniformity of the single layer film should be adjusted first before the double silver process is debugged and Understand the thickness range of a single layer film. Wherein, the uniformity of the single layer of the non-metal dielectric layer can generally be measured by the uniformity of the bf value of the color parameter of the coated glass film; and the uniformity of the single layer of the metal film layer including Ag and NiCr can generally be passed. The uniformity of the T value of the coated glass transmittance is measured.
(4) In the initial commissioning stage, it is necessary to summarize the influence of each film layer on the physical and chemical properties of the product, especially the influence of each film layer on the color and mechanical properties of the coated glass. This work will play an important role in the later accurate adjustment. Guiding significance.
(5) Accurate debugging according to the target parameters. At this stage, we are to achieve the target parameters and excellent physical and chemical properties through the monitoring of process conditions and the adjustment of process parameters on the basis of the above work. Therefore, the key tasks at this stage should include: commissioning process parameter records, commissioning sample performance test results, and final process parameters.
(6) Performance testing and verification of product stability through continuous production. This stage of work is of great significance: First, through the performance test, you can understand the performance indicators of the fixed double-silver Low-E products. The test method can be carried out with reference to the national standard. At the same time, it also provides the direction for the improvement and improvement of the subsequent product performance. A performance short board was improved. Because of the complexity of the double-silver Low-E membrane system, the performance of the final product has high requirements on equipment conditions, process parameters, vacuum conditions, etc. Only through continuous production verification, membrane systems with reproducible realization can be followed. Really put into production.
(7) Pay attention to the user's usage and provide technical support in time. To consider the current status of the domestic glass deep processing industry, the actual technical conditions and processing strength of the various processing plants vary greatly. Therefore, the author suggests a glass processing enterprise that produces dual-silver Low-E capability, and prepares a detailed "processing guide" for the newly developed double-silver Low-E coating product, and gives processing requirements for the processing conditions of the downstream glass deep processing plant. Give technical support when necessary. In this way, the double-silver Low-E coated glass will be more widely promoted in domestic construction, and it can also save more energy for the whole society.
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