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A Brief Analysis Of The Weathering Problem Of Reflective Glass

The membrane structure is a multi-layer membrane structure, and the substrate is coated with metal film, metal-ceramic absorbing film and subtraction film.


And abroad more than 95% absorption and emission rate below 5%, compared to the domestic many companies claiming to absorption rate can achieve 93% emissivity can do below 7%, but since I found in the process of cooperation with some enterprises, the performance is limited to their highest indicators, bad stability and coating process. For the reasons, I would like to discuss the effects of equipment and process on optical performance, and briefly discuss the problem of weathering.

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The membrane structure is a multi-layer membrane structure, and the substrate is coated with metal film, metal-ceramic absorbing film and subtraction film. Metal coating is very easy, and gold plating is a ceramic absorbing film and a subtraction film, which has specific requirements for equipment and process. Take the tablet for example, there are two products on the market: blue titanium (TiON) and black nickel and chromium (CrNiON). It is considered that the weatherability of blue titanium products is better, which is related to materials, because CrO is relatively poor in thermal stability. For the nitrogen oxide coating, tend to be bubbled into Ar/O/N three kinds of gas, which Ar have the effect of sputter out particles, and the N/O gas and particle reaction sputtering out effect, generate need nitrogen absorption layer. For blue titanium coating, this kind of target material is easy to be poisoned, making the deposition process unstable. With the internal ventilation with gas and pull gas cavity, if uneven, unstable atmosphere, that there is no guarantee that the whole tablet coating uniformity, another process on a lot of manufacturers to enter the size and proportion of atmosphere, also does not have sufficient optimization, makes the film performance is relatively low. Generally speaking, the membrane layer is related to the thickness of the film and the proportion of chemical elements after determining the material.

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Weatherability is also a very important performance, the longer the use time, the smaller the attenuation, the more cost-effective the product. Many enterprises in China need to realize the importance of cleaning, and the clean surface is a sufficient but unnecessary condition. After the plate is cleaned, it is also necessary to ensure that it is not contaminated when entering the coating cavity. Coating after treatment is also very important, many manufacturers after coating, the plates tend to begin to process after processing, coating after heat treatment is very necessary, actually, of course, for different plate and coating materials, different heat treatment temperature.


Demand for tablet now, the market space is very big, but we hope to make the products superior performance, at least on the service life can reach tens of years, or is detrimental to the development of the industry as a whole.