Low-emissivity coated glass and manufacturing method thereof

Abstract

The invention relates to low-emissivity coated glass and a manufacturing method thereof. The low-emissivity coated glass comprises a glass substrate and coating films coated on the glass substrate, wherein the coating films comprise a plurality of dielectric medium combined layers and AZO medium unit layers which are respectively arranged between every two adjacent dielectric medium combined layer, wherein each AZO medium unit layer comprises a functional layer and an AZO medium barrier layer, and the AZO medium barrier layer is laid at two sides of the functional layer; or each AZO medium unit layer also comprises a barrier layer, and the barrier layer is laid between the AZO medium barrier layer and the functional layer; or each AZO medium unit layer comprises a functional layer, an AZO medium barrier layer and a barrier layer, and the barrier layer and the AZO medium barrier layer are respectively laid at two sides of the functional layer. The manufacturing method comprises the steps of a. setting the glass substrate; b. coating a dielectric medium combined layer on the glass substrate; c. coating an AZO medium unit layer on the dielectric medium combined layer; d. coating another dielectric medium combined layer on the AZO medium unit layer; and e. repeating the steps from step c to step d.

Description

technical field [0001] The invention relates to a coated glass, in particular to a low-radiation coated glass coated with an AZO dielectric barrier layer and having a temperable double-functional layer structure and a manufacturing method thereof. Background technique [0002] At present, there are two main methods of producing low-emissivity coated glass. One is on-line coating, which generally refers to spraying some chemical mist on the glass surface with higher temperature according to a certain ratio during the production process of float glass to form a compound film with a certain low-radiation function, and to make it It has good physical and chemical properties, so it is generally more suitable for promotion in the civilian market. The other is off-line coating. Generally, it refers to a coating method in which metallic silver or other metals and metal compounds with extremely low emissivity are plated on the glass surface by means of vacuum magnetron sputtering a...

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Problems solved by technology

[0006] 2. During the tempering heat treatment process, the oxygen in the high-temperature air can easily penetrate into the film layer, making the silver layer partially oxidized or even completely oxidized

Therefore, off-line ordinary double-silver low-e glass cannot be tempered after coating on the substrate like on-line low-e glass. Because the coated glass already has a predetermined size and shape, the effective placement rate of small pieces of glass is reduced, the processing efficiency is low, and the cost is high

[0008] For example, the double-silver product that can be tempered and heat-treated in the prior art has a general structure: glass / SiOx / ZnOx / Ag / NiCr / ZnO / Ag / NiCr / SnOx / SiNx, and the coated glass of this structure is In particular, when the temperature exceeds 600°C, the underlying dielectric layer (SiOx / ZnOx) is difficult to prevent the Na+ in the glass from diffusing into the film layer. In addition, although the Ag layer of this structural functional layer is embedded in the middle of the NiCr barrier layer, when the temperature is high, The interdiffusion between the film layers weakens its barrier effect, which makes it difficult to control the color of the glass, and even spots and atomization occur, which brings uncertainty to production and is prone to batch waste

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