Antioxidant low-e glass
By setting a double-sided coating structure of non-metallic nitride and ITO layers on the upper and lower surfaces of Low-E glass, the problem of balancing summer heat insulation and winter heat preservation is solved, achieving two-way thermal management and low cost, which is suitable for outdoor curtain wall projects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINYI GLASS (TIANJIN) CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-19
AI Technical Summary
Existing Low-E glass cannot meet the needs of both summer heat insulation and winter heat preservation, and it is also expensive and has poor oxidation resistance.
The structure employs a double-sided coating, comprising a bottom dielectric layer, a transparent conductive low-emissivity functional layer, and a top dielectric layer, which are a non-metallic nitride layer and an ITO layer, with thicknesses of 40-120nm and 80-160nm, respectively, used on the upper and lower surfaces of the glass substrate to achieve bidirectional thermal management.
It achieves the effect of reflecting short-wave solar radiation in summer to reduce outdoor heat entry and reflecting long-wave thermal radiation indoors in winter to reduce heat loss. It has a simple membrane structure and low cost, and is widely used in outdoor curtain wall projects.
Smart Images
Figure CN224377927U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of coated glass technology, specifically relating to an anti-oxidation LOW-E glass. Background Technology
[0002] Low-emissivity glass, also known as Low-E glass, is a glass product with a multi-layered coating consisting of metals or other compounds, including a conductive low-emissivity film. Low-emissivity glass has high transmittance of visible light and high reflectivity of infrared light, providing excellent thermal insulation.
[0003] The most common Low-E glass on the market is single-coated, double-coated, or triple-coated glass with silver coating on one side. This type of glass is difficult to meet the needs of heat insulation in summer and heat preservation in winter. In addition, the cost of silver-coated glass is relatively high and its oxidation resistance is poor.
[0004] While some silver-free coated glasses have been disclosed in the prior art, their film structures are complex and mostly single-sided, making it difficult to simultaneously meet the needs of summer heat insulation and winter heat preservation. For example, Chinese patent CN221662804 U discloses a low-heat-conductivity, high-shading silver-free Low-E coated glass, comprising a glass substrate and sequentially stacked layers on the glass substrate: a bottom dielectric layer, a second dielectric layer, a first transparent conductive low-emissivity functional layer, a third dielectric layer, a second transparent conductive low-emissivity functional layer, a fourth dielectric layer, and an upper dielectric layer. The silver-free Low-E coated glass disclosed in this patent has a complex film structure and is single-sided, making it difficult to simultaneously meet the needs of summer heat insulation and winter heat preservation. Summary of the Invention
[0005] To solve the above-mentioned technical problems, this utility model provides an anti-oxidation LOW-E glass with low-emissivity film on both its upper and lower surfaces. It has a bidirectional thermal management function, which can reflect short-wave solar radiation to reduce the entry of outdoor heat in summer and reflect long-wave indoor thermal radiation to reduce the loss of indoor heat in winter. Its film structure is simple and low in cost.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] An anti-oxidation LOW-E glass includes a glass substrate and low-emissivity film layers disposed on the upper and lower surfaces of the glass substrate. The low-emissivity film layers include a bottom dielectric layer, a transparent conductive low-emissivity functional layer, and a top dielectric layer stacked sequentially. The bottom dielectric layer is disposed on the surface of the glass substrate.
[0008] The underlying dielectric layer is a non-metallic nitride layer.
[0009] The thickness of the underlying dielectric layer is 40-120 nm.
[0010] The transparent conductive low-emissivity functional layer is an ITO layer.
[0011] The thickness of the transparent conductive low-emissivity functional layer is 80-160 nm.
[0012] The top dielectric layer is a non-metallic nitride layer.
[0013] The thickness of the top dielectric layer is 50-120 nm.
[0014] The glass substrate is float glass of various colors.
[0015] In the anti-oxidation LOW-E glass provided by this invention, the bottom dielectric layer is closely attached to the surface of the glass substrate. As a transition layer between the glass and subsequent functional layers, it enhances the bonding strength between the transparent conductive low-emissivity functional layer and the glass substrate through chemical bonding or physical adsorption, preventing film peeling. It also isolates metal ions from the glass substrate from diffusing into the functional layers, preventing ion migration from affecting the performance of the transparent conductive low-emissivity functional layer. Furthermore, it fills microscopic defects on the glass surface, providing a smooth substrate and ensuring uniform deposition of subsequent functional layers. The transparent conductive low-emissivity functional layer, located above the bottom dielectric layer, is the core functional layer. It effectively reflects far-infrared thermal radiation, especially from indoor environments, reducing heat loss through the glass and maintaining indoor warmth in winter. Simultaneously, it allows visible and near-infrared light from the solar spectrum to pass through, achieving an energy-saving effect of "transmitting light but not heat." The top dielectric layer, as the outermost layer, prevents the conductive layer from being scratched, worn, or chemically corroded, extending the film's lifespan.
[0016] The anti-oxidation LOW-E glass provided by this utility model, through the combination and thickness control of the bottom dielectric layer, the transparent conductive low-emissivity functional layer, and the top dielectric layer, and through double-sided coating, can make the light transmittance of the anti-oxidation LOW-E glass between 65% and 85%, the reflectivity between 4% and 30%, and the sheet resistance between 4 and 20 Ω / sq, and the color adjustable range is large.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] The anti-oxidation LOW-E glass provided by this utility model has a low-emissivity film layer on both the upper and lower surfaces, which has a two-way thermal management function. It can reflect short-wave solar radiation to reduce the entry of outdoor heat in summer, and reflect long-wave indoor thermal radiation to reduce the loss of indoor heat in winter.
[0019] The anti-oxidation Low-E glass provided by this invention can be coated on float glass substrates of any color. When the transparent conductive low-emissivity functional layer is selected as an ITO layer, it can completely replace various models of Low-E glass containing silver or copper, and is widely used in outdoor curtain wall projects. In particular, when used in combination with insulated glass and laminated glass, it can achieve better energy-saving, safety, and aesthetic effects. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of the antioxidant LOW-E glass in this utility model, wherein 10 is a glass substrate, 201 is a bottom dielectric layer, 202 is a transparent conductive low-emissivity functional layer, and 203 is a top dielectric layer. Detailed Implementation
[0021] This utility model provides an anti-oxidation LOW-E glass, comprising a glass substrate and low-emissivity film layers disposed on the upper and lower surfaces of the glass substrate. The low-emissivity film layers include a bottom dielectric layer, a transparent conductive low-emissivity functional layer, and a top dielectric layer stacked sequentially. The bottom dielectric layer is disposed on the surface of the glass substrate.
[0022] The underlying dielectric layer is a non-metallic nitride layer with a thickness of 40-120 nm.
[0023] The transparent conductive low-emissivity functional layer is an ITO layer with a thickness of 80-160 nm.
[0024] The top dielectric layer is a non-metallic nitride layer with a thickness of 50-120 nm.
[0025] The glass substrate is float glass of various colors.
[0026] The anti-oxidation LOW-E glass provided by this utility model, through the combination and thickness control of the bottom dielectric layer, the transparent conductive low-emissivity functional layer, and the top dielectric layer, and through double-sided coating, can make the light transmittance of the anti-oxidation LOW-E glass between 65% and 85%, the reflectivity between 4% and 30%, and the sheet resistance between 4 and 20 Ω / sq. Moreover, the color can be adjusted over a wide range, and it can be widely used in outdoor curtain wall projects.
[0027] The present invention will now be described in detail with reference to the embodiments.
[0028] Example 1
[0029] An anti-oxidation LOW-E glass includes a glass substrate and low-emissivity film layers disposed on the upper and lower surfaces of the glass substrate. The low-emissivity film layers include a bottom dielectric layer, a transparent conductive low-emissivity functional layer, and a top dielectric layer stacked sequentially. The bottom dielectric layer is disposed on the surface of the glass substrate. The various film layers are shown in Table 1.
[0030] Table 1
[0031]
[0032]
[0033] Example 2
[0034] An anti-oxidation LOW-E glass includes a glass substrate and low-emissivity film layers disposed on the upper and lower surfaces of the glass substrate. The low-emissivity film layers include a bottom dielectric layer, a transparent conductive low-emissivity functional layer, and a top dielectric layer stacked sequentially. The bottom dielectric layer is disposed on the surface of the glass substrate. The various film layers are shown in Table 2.
[0035] Table 2
[0036]
[0037] Example 3
[0038] An anti-oxidation LOW-E glass includes a glass substrate and low-emissivity film layers disposed on the upper and lower surfaces of the glass substrate. The low-emissivity film layers include a bottom dielectric layer, a transparent conductive low-emissivity functional layer, and a top dielectric layer stacked sequentially. The bottom dielectric layer is disposed on the surface of the glass substrate. The various film layers are shown in Table 3.
[0039] Table 3
[0040]
[0041] Comparative Example 1
[0042] An anti-oxidation LOW-E glass includes a glass substrate and low-emissivity film layers disposed on the upper and lower surfaces of the glass substrate. The low-emissivity film layers include a bottom dielectric layer, a transparent conductive low-emissivity functional layer, and a top dielectric layer stacked sequentially. The bottom dielectric layer is disposed on the surface of the glass substrate. The various film layers are shown in Table 4.
[0043] Table 4
[0044]
[0045]
[0046] The performance of the antioxidant LOW-E glass in the above embodiments and comparative examples is shown in Table 5.
[0047] Table 5
[0048]
[0049] The above detailed description of an antioxidant LOW-E glass with reference to the embodiments is illustrative rather than limiting. Several embodiments can be listed according to the defined scope. Therefore, changes and modifications without departing from the overall concept of this utility model should be within the protection scope of this utility model.
Claims
1. An antioxidant LOW-E glass, characterized in that, The invention includes a glass substrate and low-emissivity film layers disposed on the upper and lower surfaces of the glass substrate. The low-emissivity film layers include a bottom dielectric layer, a transparent conductive low-emissivity functional layer, and a top dielectric layer stacked sequentially. The bottom dielectric layer is disposed on the surface of the glass substrate.
2. The oxidization resistant LOW-E glass according to claim 1, characterized in that, The underlying dielectric layer is a non-metallic nitride layer.
3. The oxidization resistant LOW-E glass according to claim 1, characterized in that, The thickness of the bottom dielectric layer is 40-120 nm.
4. The oxidization resistant LOW-E glass according to claim 1, characterized in that, The transparent conductive low-emissivity functional layer is an ITO layer.
5. The oxidization resistant LOW-E glass according to claim 1, characterized in that, The thickness of the transparent conductive low-emissivity functional layer is 80-160 nm.
6. The antioxidant LOW-E glass according to claim 1, characterized in that, The top dielectric layer is a non-metallic nitride layer.
7. The oxidization resistant LOW-E glass according to claim 1, characterized in that, The thickness of the top dielectric layer is 50-120 nm.
8. The oxidization resistant LOW-E glass according to claim 1, characterized in that, The glass substrate is float glass.