Low emissivity glass

Abstract

The invention discloses low emissivity glass. The low emissivity glass contains a glass substrate, a first dielectric layer, a first barrier layer, a transition layer, a metal layer and a second barrier layer in turn from bottom to top, wherein preferably, a second dielectric layer can be plated on the second barrier layer; the transition layer is adopted to promote the growth of the metal layer and ensure that the metal layer can grow to form a continuous structure, thus the glass can have high infrared reflectivity and visible light transmittance; and the barrier layers can fully protect the metal layer to ensure that the high infrared reflectivity of the metal layer can be utilized. The low emissivity glass has low production cost and very good industrial application prospect; and the energy can be effectively saved.

Description

technical field [0001] The invention relates to a low-emissivity glass, which is a coated glass whose surface is coated with multi-layer nano-films so as to transmit visible light and reflect infrared light, ultraviolet light, especially infrared light. It can effectively save energy and is suitable for vehicles and vehicles. Glass used in construction. Background technique [0002] Glass is an indispensable part of buildings, automobiles and other means of transportation. It carries many important functions, such as beautifying the appearance of buildings and automobiles, lighting, bringing a wide view to the interior, and the role of heat preservation or heat insulation. However, the sunlight transmittance of ordinary glass is very high, and the infrared reflectance is very low. Most of the sunlight enters the room through the glass, thereby heating the objects; and when the indoor temperature is higher than the outside world, the heat of these indoor objects will pass thr...

AI Technical Summary

Problems solved by technology

Its disadvantages are: it can only deposit sunshade film but not heat insulation film; it can only deposit non-selective absorbing layer, that is, single-layer monochromatic film layer; due to the characteristics of chemical plating itself that is not easy to be controlled, it is difficult to guarantee that each batch of film The consistency of the thickness of the layer, so there are very few buildings that use gel film glass in large areas.

For the silver layer / dielectric layer structure, although the outer dielectric layer can protect the silver layer to prevent it from being corroded and lose its anti-radiation effect; however, due to the weak bonding force between the silver layer and the glass, it can be wiped gently fall off, so the silver layer is directly adjacent to the glass, and the low-emissivity layer is easy to fall off, which affects the long-term use of the glass

For the structure of dielectric layer / silver layer, because silver is easily oxidized in the air, it is not suitable as the top layer

Although the dielectric layer / silver layer / dielectric layer structure makes up for the shortcomings of the previous two structures, because the dielectric layer is generally composed of oxides, the oxygen in it and even the oxygen in the outer space will still destroy the silver layer at high temperatures. Oxidation increases the transmittance in the infrared and decreases the transmittance in the visible light, resulting in poor low-radiation effect and unstable performance; even if the dielectric layer is non-oxide, oxygen and other substances in the external space can still be released at high temperatures. Corrosion to silver, affecting its low radiation effect

Therefore, the above structures are not perfect. They have various unfavorable factors that affect the normal function of silver, resulting in unsatisfactory low-radiation effects.

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