Coated glass is also called reflective glass. Coated glass is a glass surface coated with one or more layers of metal, alloy or metal compound film to change the optical properties of the glass to meet certain specific requirements. Coated glass can be divided into the following categories according to the different characteristics of the product: heat reflective glass, low-emissivity glass (Low-E), conductive film glass, etc.
Classification
Heat-reflective glass is generally coated with one or more layers of thin films composed of metals or their compounds such as chromium, titanium or stainless steel on the glass surface, making the product rich in color, with appropriate transmittance for visible light, high reflectivity for infrared rays, and high absorption rate for ultraviolet rays. Therefore, it is also called sunlight control glass, which is mainly used in buildings and glass curtain walls; low-emissivity glass is a thin film system composed of multiple layers of silver, copper or tin or other metals or their compounds coated on the glass surface. The product has high transmittance for visible light, high reflectivity for infrared rays, and good heat insulation performance. It is mainly used in buildings and transportation vehicles such as automobiles and ships. Due to the poor strength of the film layer, it is generally made into hollow glass for use; conductive film glass is coated with conductive films such as indium tin oxide on the glass surface, which can be used for heating, defrosting, defogging, and as a liquid crystal display screen.
There are many methods for producing coated glass, mainly vacuum magnetron sputtering, vacuum evaporation, chemical vapor deposition, and sol-gel method. Magnetron sputtering coated glass can design and manufacture multi-layer complex film systems using magnetron sputtering technology. It can coat a variety of colors on a white glass substrate. The film layer has good corrosion resistance and wear resistance. It is one of the most produced and used products. There is a certain gap between the variety and quality of vacuum evaporation coated glass and magnetron sputtering coated glass, and it has been gradually replaced by vacuum sputtering. Chemical vapor deposition is to introduce reactive gas into the float glass production line to decompose on the hot glass surface and evenly deposit on the glass surface to form coated glass. The characteristics of this method are low equipment investment, easy regulation, low product cost, good chemical stability, and can be hot processed. It is one of the most promising production methods. The sol-gel method is simple to produce coated glass with good stability. The disadvantage is that the product light transmittance is too high and the decorative effect is poor.
