Analysis of Weatherability of Coated Glass
Coated glass is coated with one or more layers of metal, alloy or metal compound film on the glass surface to change the optical properties of the glass to meet certain requirements. And more than 95% absorption rate and 5% below the emissivity, although many domestic companies known as the absorption rate can be 93% emissivity can be less than 7%, but from my cooperation with some enterprises found that these properties Limited to their highest indicators, and the coating process is not stable. The reason, I would like to talk about both the equipment and the process of the impact on the optical performance, to explore the next weatherability problem.
Coated glass, the film structure is a multi-layer structure, the substrate in turn coated with metal film, metal - ceramic absorption film and anti-reflective film. Metal coating is very easy, and metallized ceramic absorption film and anti-reflective film, the equipment and processes have specific requirements. To flat, for example, there are two products on the market: blue titanium (TiON) and black nickel, chromium (CrNiON). Personally think that blue titanium products will be better weather resistance, which is related to the material, because the CrO thermal stability is relatively poor. For these nitroxide coatings, Ar / O / N are often introduced into three gases, where Ar acts as a sputtering particle and the N / O gas reacts with the sputtered particles to produce the desired Nitrogen oxide absorption layer. For the blue titanium coating, this target is relatively easy to poison, making the deposition process is unstable. This is related to the internal access to the gas and the extraction of gas, if the atmosphere is uneven, unstable, it can not guarantee the uniformity of the entire flat coating, while many manufacturers on the atmosphere of the size and proportion of the input, nor the full optimization, Making the film performance is relatively low. In general, the film after the determination of the material, and the thickness of the film and the proportion of chemical elements.
Weatherability is also a very important product performance, the longer the use of time, the smaller the attenuation, the higher the cost of the product. Many domestic enterprises need to recognize the importance of cleaning, the composition of the clean surface is a strong but full of necessary conditions. After the plate is cleaned, it is necessary to ensure that it will not be contaminated when entering the coating cavity. After the coating is also very important to deal with, may be a lot of manufacturers in the coating, the plate is often started after the process of processing, in fact, after the heat treatment is very necessary, of course, for different plates and coating materials, heat treatment temperature is not the same The
Now for the demand for coated glass, the market space is very large, but we hope that the enterprise to do the superior performance of products, at least in life can reach decades, or for the development of the industry is also unfavorable.