Double-sided coated glass

Abstract

The invention discloses double-sided coated glass. The double-sided coated glass comprises a glass substrate, a first coating layer and a second coating layer, the first coating layer is arranged on the front surface of the glass substrate and sequentially comprises an anti-reflection layer, an ultraviolet reflection layer and a middle and far infrared reflection layer from the glass substrate to the outside; the second coating layer is arranged on the back surface of the glass substrate and sequentially comprises a near-infrared reflecting layer and a near-infrared regulation and control layer from the glass substrate to the outside, and the near-infrared regulation and control layer is used for regulating and controlling the reflectivity of the near-infrared reflecting layer. According to the design of the front anti-reflection layer of the double-sided coated glass, through continuous transition of the particle size and the refractive index of nanoparticles, the visible light reflectivity is remarkably reduced, and the light transmittance of the glass is kept to be 85% or above and is superior to that of existing composite coated glass; meanwhile, through the synergistic effect of the ultraviolet reflecting layer, the middle and far infrared reflecting layer and the back near-infrared reflecting layer, the ultraviolet blocking rate can be larger than or equal to 99%, the comprehensive infrared blocking rate can be larger than or equal to 90%, and the technical problem that light transmission and blocking performance of traditional glass are difficult to consider at the same time is solved.

Description

Technical Field

[0001] This invention relates to the field of glass coating technology, and specifically to a double-sided coated glass. Background Technology

[0002] Glass is widely used as an important light-transmitting material in fields such as greenhouse construction and automobiles. In these scenarios, glass needs to maintain a high light transmittance to meet the lighting requirements, while also effectively blocking infrared and ultraviolet rays from sunlight to improve environmental comfort and reduce the hazards of light radiation.

[0003] Ultraviolet rays in sunlight can damage human skin and accelerate the aging and fading of furniture and fabrics; infrared rays are the main carriers of heat transfer, and a large amount of them entering indoor or vehicle interiors can lead to an increase in ambient temperature. Therefore, glass that combines high light transmittance with efficient blocking of infrared and ultraviolet rays has become a hot research and development topic in the industry.

[0004] In existing technologies, ordinary transparent glass can achieve a light transmittance of over 85%, but its ultraviolet (UV) blocking rate is less than 10%, and its infrared (IR) blocking rate is only about 20%, which is insufficient to meet practical needs. To improve its functionality, various functional coated glasses have emerged in existing technologies: for example, glass with a single-layer metal oxide coating can block infrared rays, but this often comes with a decrease in light transmittance; laminated glass containing UV absorbers can increase the UV blocking rate to over 90%, but it has virtually no blocking effect on infrared rays; some multi-layer composite coated glasses can simultaneously block both types of rays, but in pursuit of blocking effect, the film thickness is often excessively increased, causing the light transmittance to drop below 55%, and interference fringes are easily generated between film layers due to refractive index mismatch, seriously affecting the visual effect. In addition, existing coating technologies mostly focus on single-sided glass treatment, making it difficult to balance the requirements of light transmittance and blocking. How to achieve efficient blocking of infrared and UV rays without significantly affecting the light transmittance of the glass has become an urgent problem to be solved by existing glass materials. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention designs a double-sided coated glass, comprising: a glass substrate, a first coating layer, and a second coating layer; the first coating layer is disposed on the front side of the glass substrate and includes, in sequence from the glass substrate outwards: an anti-reflection layer, an ultraviolet reflective layer, and a mid- to far-infrared reflective layer; the second coating layer is disposed on the back side of the glass substrate and includes, in sequence from the glass substrate outwards: a near-infrared reflective layer and a near-infrared modulation layer, wherein the near-infrared modulation layer is used to regulate the reflectivity of the near-infrared reflective layer.

[0006] Preferably, the antireflective layer is a SiO2-TiO2 gradient composite film of composite nanoparticles, wherein the particle size of the composite nanoparticles increases from 20nm to 80nm, the refractive index transitions continuously from 1.46 to 1.98, and the thickness is 80nm-120nm.

[0007] Preferably, the ultraviolet reflective layer consists of 8-10 alternating layers of SiO2 and TiO2 films, wherein the thickness of each layer is λ / 5n-λ / 3n; where λ is the center wavelength of the ultraviolet light, ranging from 300nm to 320nm, and n is the refractive index, wherein the refractive index of SiO2 is 1.45 and the refractive index of TiO2 is 2.45.

[0008] Preferably, the mid- and far-infrared reflective layer comprises, from the glass substrate outwards, a Si3N4 film layer and an Al2O3 film layer, wherein the thickness of the Si3N4 film layer is 70nm-120nm and the thickness of the Al2O3 film layer is 50nm-80nm.

[0009] Preferably, the reflection angle corresponding to the peak value of the mid- and far-infrared reflective layer is 60°-70°.

[0010] Preferably, the near-infrared reflective layer is an In2O3-SnO2 composite film with a thickness of 15nm-20nm and a resistivity of no more than 2×10⁻⁶. -4 Ω·cm.

[0011] Preferably, the near-infrared modulation layer is a graphene film layer, on which a positive electrode and a negative electrode are disposed, and the positive electrode and the negative electrode are used to apply a bias voltage that can be adjusted between -3V and 3V.

[0012] Preferably, the reflectivity of the near-infrared control layer is adjusted within the range of 40%-90% by biasing the near-infrared reflective layer.

[0013] Preferably, an antireflection protective layer is provided on the outer side of the near-infrared modulation layer. The antireflection protective layer is a SiO2 film layer of nanoporous particles with a particle size of 50nm-80nm, a porosity of 30%-40%, and a film thickness of 100nm-150nm.

[0014] Preferably, the front of the glass substrate faces outdoors, and a hydrophobic layer is provided on the outer side of the mid- and far-infrared reflective layer; the back of the glass substrate faces indoors.

[0015] Compared with the closest prior art, the beneficial effects of the present invention are as follows:

[0016] 1. The antireflective layer on the front side of the double-sided coated glass of this invention adopts a SiO2-TiO2 gradient composite film design. Through the continuous transition of nanoparticle size and refractive index, the visible light reflectivity is significantly reduced, and the light transmittance of the glass is maintained at more than 85%, which is superior to existing composite coated glass. At the same time, through the synergistic effect of the ultraviolet reflective layer, the mid-far-infrared reflective layer and the near-infrared reflective layer on the back side, the ultraviolet blocking rate can be ≥99% and the comprehensive infrared blocking rate can be ≥90%, which solves the technical problem that traditional glass cannot achieve both light transmittance and blocking properties.

[0017] 2. The double-sided coated glass of this invention features a mid-to-far infrared reflective layer on the front side. Through a specific thickness ratio of Si3N4 and Al2O3 films, a reflection peak is formed at an incident angle of 60°-70°, which can effectively block outdoor mid-to-far infrared radiation from entering the room in summer. The near-infrared reflective layer on the back side is combined with a graphene control layer. By applying a bias voltage of -3V to 3V, the near-infrared reflectivity can be dynamically adjusted within a range of 40%-90%. High reflection is achieved during high temperatures in summer to reduce indoor heat gain, while low reflection is achieved during low temperatures in winter to allow infrared radiation to enter for heating. This achieves energy saving by adapting to the outside temperature and reducing energy input.

[0018] 3. The ultraviolet reflection layer on the front side of the double-sided coated glass of this invention adopts an alternating film system of 8-10 layers of SiO2 film and TiO2 film. Through the multi-layer interference effect, combined with the absorption characteristics of the glass substrate itself, it can completely block ultraviolet rays incident from different angles, avoiding damage to human skin and aging of furniture and fabrics.

[0019] 4. The hydrophobic layer on the front side of the double-sided coated glass of this invention reduces the contact angle of the glass surface, providing a self-cleaning function and reducing dust adhesion; the anti-reflective protective layer on the back side adopts a nanoporous SiO2 film structure, which enhances light transmittance and protects the graphene control layer from external corrosion. At the same time, through refractive index matching design, each film layer effectively eliminates interference fringes, improving visual clarity compared to traditional multi-layer coated glass. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the double-sided coated glass of the present invention.

[0021] Figure label:

[0022] 1-Glass substrate, 2-First coating layer, 21-Antireflective layer, 22-Ultraviolet reflective layer, 23-Mid-far infrared reflective layer, 24-Hydrophobic layer, 3-Second coating layer, 31-Near infrared reflective layer, 32-Near infrared modulation layer, 33-Antireflective protective layer. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0024] like Figure 1As shown, this invention provides a double-sided coated glass, comprising: a glass substrate 1, a first coating layer 2, and a second coating layer 3; the first coating layer 2 is disposed on the front side of the glass substrate 1, and sequentially includes, from the glass substrate 1 outwards: an anti-reflection layer 21, an ultraviolet reflective layer 22, and a mid-to-far-infrared reflective layer 23; the second coating layer 3 is disposed on the back side of the glass substrate 1, and sequentially includes, from the glass substrate 1 outwards: a near-infrared reflective layer 31 and a near-infrared modulation layer 32, wherein the near-infrared modulation layer 32 is used to regulate the reflectivity of the near-infrared reflective layer 31. The design of the front anti-reflection layer of the double-sided coated glass, through the continuous transition of nanoparticle size and refractive index, significantly reduces visible light reflectivity, keeping the glass transmittance above 85%, which is superior to existing composite coated glass; simultaneously, through the synergistic effect of the ultraviolet reflective layer, the mid-to-far-infrared reflective layer, and the back near-infrared reflective layer, an ultraviolet blocking rate ≥99% and an infrared comprehensive blocking rate ≥90% can be achieved, solving the technical problem that traditional glass cannot simultaneously achieve both light transmittance and blocking properties.

[0025] In a preferred embodiment, the antireflective layer 21 is a SiO2-TiO2 gradient composite film layer with composite nanoparticles. The particle size of the composite nanoparticles gradually increases from 20 nm to 80 nm, the refractive index transitions continuously from 1.46 to 1.98, and the thickness is 80 nm to 120 nm. The front antireflective layer of the double-sided coated glass adopts the SiO2-TiO2 gradient composite film layer design. Through the continuous transition of nanoparticle size and refractive index, the visible light reflectivity is significantly reduced, keeping the glass transmittance above 85%, which is superior to existing composite coated glass. At the same time, through the synergistic effect of the ultraviolet reflective layer, the mid-far-infrared reflective layer, and the back near-infrared reflective layer, the ultraviolet blocking rate can be ≥99%, and the comprehensive infrared blocking rate can be ≥90%, solving the technical problem that traditional glass cannot simultaneously achieve both light transmittance and blocking properties.

[0026] In a preferred embodiment, the ultraviolet reflective layer 22 consists of 8-10 alternating layers of SiO2 and TiO2 films, with each layer having a thickness of λ / 5n-λ / 3n; where λ is the center wavelength of the ultraviolet light, ranging from 300nm to 320nm, and n is the refractive index, with SiO2 having a refractive index of 1.45 and TiO2 having a refractive index of 2.45. The front ultraviolet reflective layer of the double-sided coated glass employs an alternating system of 8-10 layers of SiO2 and TiO2 films. Through multi-layer interference effects, combined with the absorption characteristics of the glass substrate itself, it can comprehensively block ultraviolet rays incident from different angles, preventing damage to human skin and aging of furniture and fabrics.

[0027] In a preferred embodiment, the mid- and far-infrared reflective layer 23 comprises a Si3N4 film and an Al2O3 film layer from the glass substrate 1 outwards, wherein the thickness of the Si3N4 film layer is 70nm-120nm and the thickness of the Al2O3 film layer is 50nm-80nm.

[0028] In a preferred embodiment, the reflection angle corresponding to the peak value of the mid- and far-infrared reflective layer 23 is 60°-70°.

[0029] In a preferred embodiment, the near-infrared reflective layer 31 is an In2O3-SnO2 composite film with a thickness of 15nm-20nm and a resistivity of no more than 2×10⁻⁶. -4 Ω·cm.

[0030] In a preferred embodiment, the near-infrared modulation layer 32 is a graphene film layer, on which a positive electrode and a negative electrode are disposed, the positive electrode and the negative electrode being used to apply a bias voltage adjustable between -3V and 3V.

[0031] In a preferred embodiment, the near-infrared control layer 32 adjusts the reflectivity of the near-infrared reflective layer 31 within the range of 40%-90% by biasing. The mid-to-far-infrared reflective layer on the front side of the double-sided coated glass forms a reflection peak at an incident angle of 60°-70° through a specific thickness ratio of Si3N4 and Al2O3 films, which can effectively block outdoor mid-to-far-infrared radiation from entering the room in summer. The near-infrared reflective layer on the back side is combined with the graphene control layer, and the near-infrared reflectivity can be dynamically adjusted by applying a bias voltage of -3V to 3V, with an adjustment range of 40%-90%. High reflection in high summer temperatures reduces indoor heat gain, while low reflection in low winter temperatures allows infrared radiation to enter for heating, achieving energy saving by adapting to the outside temperature and reducing energy input.

[0032] In a preferred embodiment, an antireflection protective layer 33 is provided on the outer side of the near-infrared modulation layer 32. The antireflection protective layer 33 is a SiO2 film layer of nanoporous particles with a particle size of 50nm-80nm, a porosity of 30%-40%, and a film thickness of 100nm-150nm.

[0033] In a preferred embodiment, the front of the glass substrate 1 faces outdoors, and a hydrophobic layer 24 is provided on the outer side of the mid- and far-infrared reflective layer 23; the back of the glass substrate 1 faces indoors. The hydrophobic layer on the front of the double-sided coated glass can reduce the contact angle of the glass surface, has a self-cleaning function, and reduces dust adhesion; the anti-reflective protective layer on the back adopts a nanoporous SiO2 film structure, which enhances light transmittance and protects the graphene control layer from external corrosion. At the same time, through refractive index matching design, each film layer effectively eliminates interference fringes, and the visual clarity is improved compared with traditional multi-layer coated glass.

[0034] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, the terms "upper" and "lower" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "upper" or "lower" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the pending application of the present invention.

Claims

1. A double-sided coated glass, characterized in that, include: Glass substrate (1), first coating layer (2), and second coating layer (3); The first coating layer (2) is disposed on the front side of the glass substrate (1), and includes, in sequence from the glass substrate (1) outward: an anti-reflection layer (21), an ultraviolet reflection layer (22) and a mid- and far-infrared reflection layer (23); The second coating layer (3) is disposed on the back side of the glass substrate (1) and includes, in sequence from the glass substrate (1): a near-infrared reflective layer (31) and a near-infrared control layer (32). The near-infrared control layer (32) is used to control the reflectivity of the near-infrared reflective layer (31).

2. The double-sided coated glass as described in claim 1, characterized in that, The antireflective layer (21) is a SiO2-TiO2 gradient composite film of composite nanoparticles. The particle size of the composite nanoparticles increases from 20nm to 80nm, the refractive index transitions continuously from 1.46 to 1.98, and the thickness is 80nm-120nm.

3. The double-sided coated glass as described in claim 1, characterized in that, The ultraviolet reflective layer (22) consists of 8-10 alternating layers of SiO2 film and TiO2 film, wherein the thickness of each layer is λ / 5n-λ / 3n; Where λ is the center wavelength of ultraviolet light, ranging from 300nm to 320nm, and n is the refractive index, where the refractive index of SiO2 is 1.45 and the refractive index of TiO2 is 2.

45.

4. The double-sided coated glass as described in claim 1, characterized in that, The mid- and far-infrared reflective layer (23) includes a Si3N4 film and an Al2O3 film layer from the glass substrate (1) outwards, wherein the thickness of the Si3N4 film layer is 70nm-120nm and the thickness of the Al2O3 film layer is 50nm-80nm.

5. The double-sided coated glass as described in claim 1, characterized in that, The reflection angle corresponding to the peak value of the mid- and far-infrared reflective layer (23) is 60°-70°.

6. The double-sided coated glass as described in claim 1, characterized in that, The near-infrared reflective layer (31) is an In2O3-SnO2 composite film with a thickness of 15nm-20nm and a resistivity of no more than 2×10⁻⁶. -4 Ω·cm.

7. The double-sided coated glass as described in claim 1, characterized in that, The near-infrared modulation layer (32) is a graphene film layer, on which a positive electrode and a negative electrode are disposed. The positive electrode and the negative electrode are used to apply a bias voltage that can be adjusted between -3V and 3V.

8. The double-sided coated glass as described in claim 7, characterized in that, The near-infrared modulation layer (32) adjusts the reflectivity of the near-infrared reflective layer (31) within the range of 40%-90% by biasing.

9. The double-sided coated glass as described in claim 1, characterized in that, An anti-reflection protective layer (33) is provided on the outside of the near-infrared modulation layer (32). The anti-reflection protective layer (33) is a SiO2 film of nanoporous particles with a particle size of 50nm-80nm, a porosity of 30%-40%, and a film thickness of 100nm-150nm.

10. The double-sided coated glass according to any one of claims 1-9, characterized in that, The glass substrate (1) faces outdoors, and a hydrophobic layer (24) is provided on the outer side of the mid- and far-infrared reflective layer (23); the back of the glass substrate (1) faces indoors.

Images