CN117209165A - Curved steel three-silver glass, preparation method thereof and flat-curved integrated three-silver sandwich hollow glass - Google Patents

Abstract

The invention discloses a curved steel three-silver glass and a preparation method thereof, as well as a flat-bent integrated three-silver laminated hollow glass. The bent steel three-silver glass includes a first glass substrate and a bent steel coating layer. The bent steel coating layer is compounded on the surface of the first glass substrate; the bent steel coating layer includes a first dielectric combination layer and a first Ag protection layer from the inside to the outside. layer, the first Ag layer, the second Ag protective layer, the first crystal bed dielectric layer, the second dielectric combination layer, the second Ag layer, the third Ag protective layer, the second crystal bed dielectric layer, the third dielectric combination layer, The third Ag layer, the fourth Ag protection layer, the third crystal bed dielectric layer, and the fourth dielectric combination layer; the second dielectric combination layer and the third dielectric combination layer are oxide combination layers, and the oxide combination layer is At least two types of ZnSnO layers, ZnAlO layers, and ZnSnO and ZnAlO composite layers. The flat and curved integrated three-silver laminated insulating glass of the present invention is extremely matched in performance and color.

Description

Bent steel three-silver glass and its preparation method, flat-bent integrated three-silver laminated insulating glass

Technical field

The invention belongs to the field of glass, and in particular relates to a curved steel three-silver glass and a preparation method thereof, as well as a flat-bent integrated three-silver laminated hollow glass.

Background technique

Triple silver glass is coated glass with a multi-layer composite film structure. The coating contains three independent silver layers and has good energy-saving effects. With the deepening of the global dual-carbon consensus, the global demand for low-carbon and high-energy-saving products has gradually formed a new trend. The curtain wall design of major cities in the world therefore prefers more energy-saving double silver/triple silver glass products. In order to show its design originality, its design The exterior wall energy-saving glass products are also becoming more and more unique in shape. Some key projects are often designed with a streamlined and curved appearance to reflect the individual differences in their own design appearance and convey their related design concepts. In order to increase safety, sandwich coated products are used, so there are many flat and curved coated sandwich products, and some curved products involve single and double curved coated sandwich products. Under the current technical conditions, the flat and curved matching effect of high-performance double silver and triple silver coating products is not ideal, and the matching effect of triple silver is even worse. Most of them have obvious color differences visible to the naked eye at small angles outdoors, reflected color indoors, and transmitted color.

In order to reduce this difference, the following two methods are usually used:

First, for the same process, the same film of the temperable film system is used. For example, three-silver products use a steel-resistant three-silver film to achieve the same color. However, in practical applications, there are deformation problems after the three-silver steel is tempered, which is inconsistent with the deformation of uncoated laminated white glass sheets. Quality problems such as glue opening and bubbles after interlayering often occur. The solution is often to use a vacuum process, but this production efficiency is very low and the manufacturing cost is very high. It is only applied to bent steel products that have to be vacuumed.

Secondly, for matching different processes, such as three-silver flat products, energy-saving requirements are often lowered on curved products, and single-silver or double-silver products are used to match flat three-silver products. Although the differences have improved in outdoor observation, production and processing The difficulty is reduced, but the energy saving performance is significantly reduced, which does not meet the energy saving requirements.

At present, tempered three-silver insulating glass products are relatively mature in domestic applications and are mainly used in high-transparency areas (areas where the visible light transmittance in insulating glass is ≥ 60%). Moreover, their processing and wear resistance are not good, so subsequent development is difficult. Tempering, hot-dipping, and interlayering cause great quality risks. In the medium and low transmittance area (the area where the visible light transmittance in insulating glass is 40-55%), effective application is often not possible due to poor matching.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention proposes a bent steel three-silver glass and a preparation method thereof, as well as a flat-bent integrated three-silver laminated insulating glass. The second dielectric combination layer and the third dielectric combination layer of the bent steel three-silver glass are pure oxides. layer, which can effectively solve the problem of poor wear resistance after tempering; the curved steel three-silver glass is matched with the flat steel three-silver glass to form a flat-curved integrated three-silver laminated insulating glass that is extremely matched in performance and color. .

In order to solve the above technical problems, the first aspect of the present invention provides a curved steel triple silver glass, which includes a first glass substrate and a curved steel coating layer, and the curved steel coating layer is compounded on the first glass substrate. surface;

The bent steel coating layer includes a first dielectric combination layer, a first Ag protective layer, a first Ag layer, a second Ag protective layer, a first crystal bed dielectric layer, a second dielectric combination layer, and a second Ag protective layer in order from the inside to the outside. layer, a third Ag protective layer, a second crystal bed dielectric layer, a third dielectric combination layer, a third Ag layer, a fourth Ag protective layer, a third crystal bed dielectric layer, and a fourth dielectric combination layer;

The second dielectric combination layer and the third dielectric combination layer are oxide combination layers, and the oxide combination layer is at least two of a ZnSnO layer, a ZnAlO layer, and a ZnSnO and ZnAlO composite layer.

Specifically, compared with the SiN layer contained in the intermediate dielectric layer of the traditional bent steel (non-planar tempered) triple silver glass, the intermediate dielectric layer (the second dielectric combination layer and the third dielectric combination layer) of the bent steel triple silver glass of the present invention ) uses pure oxide to solve the problem of poor wear resistance after tempering. The main reason is: after tempering, the nitride and oxide will recrystallize, part of the oxygen enters the nitride, and part of the nitrogen enters the oxide, forming a nitrogen oxide with a higher degree of roughness, and the rougher it is, the greater the friction The greater the force, the problem of poor wear resistance and easy film removal will occur.

Wherein, the ZnSnO and ZnAlO composite layers are alternately provided with ZnSnO layers and ZnAlO layers.

As a further improvement of the above solution, the first dielectric combination layer is at least two of a SiZrN layer, a SiN layer, and a ZnAlO layer, and the innermost layer of the bent steel coating layer is a SiZrN layer.

Specifically, in order to enhance the bonding force between the film layer and the glass substrate, the innermost layer of the film layer is transitioned using SiZrN, which is similar to the main material of glass. Zr zirconium easily absorbs hydrogen, nitrogen and oxygen, and Zr has a very low affinity for oxygen. powerful. After the coated glass is cleaned with high-purity water by a coating cleaning machine, there are often residual contaminant layers such as suction cup marks and foam stripes that are difficult to see on the surface. After tempering, this part of the oxygen easily crosses the dielectric base layer and enters the internal metal Ag layer, forming an oxidation of the Ag layer. , the appearance defects of the tempered glass appear. The affinity of zirconium to oxygen is very strong, and the innermost layer is made of SiZrN. When tempered and heated, it can absorb this part of the oxygen, thereby eliminating product defects caused by the unclean glass surface after tempering.

As a further improvement of the above solution, the fourth dielectric combination layer is a nitride layer or an oxide layer, and the outermost layer of the bent steel coating layer is an oxide layer; the nitride layer is a SiZrN layer and/or SiN layer, the oxide layer is a SiZrO layer and/or a ZrO layer.

Specifically, the outermost layer is set as an oxide layer, which is beneficial to the subsequent processing requirements of the steelable triple silver film, such as cutting, tempering, interlayering, hollowing, etc., and is also beneficial to improving the anti-oxidation, anti-scratch and other properties of the glass. .

Wherein, when the nitride layer is a SiZrN layer and a SiN layer, the SiZrN layer and the SiN layer are arranged alternately; when the oxide layer is a SiZrO layer and a ZrO layer, the SiZrO layer and the ZrO layer are arranged alternately.

As a further improvement of the above solution, the first Ag protective layer, the second Ag protective layer, the third Ag protective layer and the fourth Ag protective layer are all Ti layers and/or NiCr layers.

As a further improvement of the above solution, the first crystal bed dielectric layer, the second crystal bed dielectric layer and the third crystal bed dielectric layer are all AZO layers.

Preferably, the thickness of the first dielectric combination layer is 20-50 nm.

Preferably, the thickness of the second dielectric combination layer is 40-70 nm.

Preferably, the thickness of the third dielectric combination layer is 40-80 nm respectively.

Preferably, the thickness of the fourth dielectric combination layer is 15-55 nm.

Preferably, the thickness of the first Ag layer is 5-12 nm.

Preferably, the thickness of the second Ag layer and the third Ag layer is 5-20 nm.

Preferably, the thickness of the first Ag protective layer and the second Ag protective layer is 0.5-3 nm.

Preferably, the thickness of the third Ag protective layer and the fourth Ag protective layer are both 1-8 nm.

Preferably, the thickness of the first crystal bed dielectric layer, the second crystal bed dielectric layer and the third crystal bed dielectric layer is 5-20 nm.

A second aspect of the present invention provides a method for preparing the above-mentioned bent steel triple silver glass, which includes the following steps:

Coating the surface of the first glass substrate to form a first dielectric combination layer, a first Ag protective layer, a first Ag layer, a second Ag protective layer, and a first crystal layer in sequence from the inside to the outside. Bed dielectric layer, second dielectric combination layer, second Ag layer, third Ag protective layer, second crystal bed dielectric layer, third dielectric combination layer, third Ag layer, fourth Ag protective layer, third crystal bed medium layer and the fourth dielectric combination layer; and then tempered to obtain the bent steel three-silver glass.

As a further improvement of the above solution, the coating uses a magnetron sputtering process, and the second dielectric combination layer and the third dielectric combination layer use argon and oxygen sputtering.

Preferably, the target materials sputtered by the second dielectric combination layer and the third dielectric combination layer are ZnSn and ZnAl, using AC rotating targets, and the sputtering gas pressure is 3×10 ^-3 to 5×10 ^-3 mbar. Argon and oxygen sputtering were used.

Preferably, the target materials of the first dielectric combination layer are SiZr, SiAl and ZnAl, an AC rotating target is used, the sputtering gas pressure is 3×10 ^-3 to 5×10 ^-3 mbar, and argon and nitrogen, or argon are used. gas and oxygen sputtering.

Preferably, the target materials of the fourth dielectric combination layer are SiZr, SiAl, ZrO and SiZrO, an AC rotating target is used, and the sputtering gas pressure is 3×10 ^-3 to 5×10 ^-3 mbar, in which SiZr and SiAl use argon. gas and nitrogen sputtering; ZrO and SiZrO are sputtered with argon and oxygen.

Preferably, the target material of the first Ag layer, the second Ag layer and the third Ag layer is Ag, a DC planar target is used, the sputtering gas pressure is 2×10 ^-3 to 3×10 ^-3 mbar, and argon gas is used. Sputter.

Preferably, the target materials of the first Ag protective layer, the second Ag protective layer, the third Ag protective layer and the fourth Ag protective layer are NiCr and Ti, a DC planar target is used, and the sputtering gas pressure is 2×10 ^-3 to 3×10 ^-3 mbar, using argon sputtering.

Preferably, the target material of the first crystal bed dielectric layer, the second crystal bed dielectric layer and the third crystal bed dielectric layer is AZO, an AC rotating target is used, and the sputtering gas pressure is 3×10 ^-3 to 5×10 ^-3 mbar with argon sputtering.

The third aspect of the present invention provides a flat-bent integrated three-silver laminated insulating glass, which includes flat steel (flat tempered) three-silver glass and curved steel three-silver glass. The flat steel three-silver glass and the curved steel three-silver glass There is a hollow interlayer in the middle of the glass, and the three-silver curved steel glass is the above-mentioned three-silver curved steel glass.

As a further improvement of the above solution, the flat steel three-silver glass includes a second glass substrate and a flat steel coating layer, and the flat steel coating layer is compounded on the surface of the second glass substrate;

The flat steel coating layer includes multiple film layers in sequence from the inside to the outside, wherein: the innermost layer is a SiZrN layer, the outermost layer is a SiZrO layer or a ZrO layer; the middle dielectric layer is a combination layer of nitride and oxide.

As a further improvement of the above solution, the flat steel coating layer includes SiZrN layer, ZnAlO layer, Ag layer, NiCr/Ti layer, AZO layer, SiZrN/SiNx layer, ZnSnO/ZnAlO layer, Ag layer, NiCr/ Ti layer, AZO layer, SiZrN/SiN layer, ZnSnO/ZnAlO layer, Ag layer, NiCr/Ti layer, AZO layer, SiZrN/SiN layer, ZrO/SiZrO layer; where SiZrN/SiN layer means SiZrN layer and/or SiN layer , NiCr/Ti layer represents NiCr layer and/or Ti layer, ZnSnO/ZnAlO represents ZnSnO layer and/or ZnAlO layer.

In addition to the NiCr/Ti layer, oxidation-assisted sputtering is used to enable the coated product to more highly restore the film state after the coating is tempered. The flat steel coating layer is also coated using the magnetron sputtering process. The coating process of each layer (including the corresponding target material, sputtering pressure and sputtering gas) is basically the same as the above-mentioned bent steel coating layer. At the same time, the second glass substrate and the first glass substrate are made of the same material.

The above technical solution of the present invention has at least the following technical effects or advantages compared with the existing technology:

(1) The present invention greatly improves the wear resistance, surface defects and processing performance of the tempered glass by arranging the structure of the curved steel coating layer of the curved steel triple silver glass and matching the specific film material. Among them: the middle dielectric layer (such as the second dielectric combination layer and the third dielectric combination layer) is made of pure oxide, does not contain SiZrN/SiN, and can achieve wear resistance reaching national standards and meet subsequent processing requirements; the innermost layer is made of The transition to SiZrN, which is similar to the main material of glass, can effectively overcome surface defects such as watermarks on the glass surface, foam stripes on the spacer, and suction cup marks; the outermost layer uses a SiZrO layer and/or a ZrO layer, which is beneficial to improving the film's durability. Subsequent processing performance, and improve the oxidation resistance and scratch resistance of the glass.

(2) When preparing the flat steel three-silver glass of the present invention, the flat steel process film layers NiCr layer and Ti layer adopt an oxygen-assisted sputtering process, which can make the product highly restored to the film state after coating and tempering.

(3) The flat-curved integrated triple-silver laminated insulating glass made of the curved steel triple-silver glass and the flat steel triple-silver glass of the present invention is extremely matched in terms of performance and color, and has strong processing resistance.

Description of the drawings

Figure 1 is a schematic structural diagram of the bent steel three-silver glass according to Embodiment 1 of the present invention;

Figure 2 is a schematic structural diagram of flat steel three-silver glass according to Embodiment 2 of the present invention.

Among them: 100 represents the first glass substrate, 201 represents the first dielectric combination layer, 202 represents the first Ag protective layer, 203 represents the first Ag layer, 204 represents the second Ag protective layer, 205 represents the first crystal bed dielectric layer, 206 represents the second dielectric combination layer, 207 represents the second Ag layer, 208 represents the third Ag protective layer, 209 represents the second crystal bed dielectric layer, 210 represents the third dielectric combination layer, 211 represents the third Ag layer, and 212 represents the third There are four Ag protective layers, 213 represents the third crystal bed dielectric layer, and 214 represents the fourth dielectric combination layer.

300 represents the second glass substrate, 401 represents the first film layer, 402 represents the second film layer, 403 represents the third film layer, 404 represents the fourth film layer, 405 represents the fifth film layer, 406 represents the sixth film layer, 407 represents the seventh film layer, 408 represents the eighth film layer, 409 represents the ninth film layer, 410 represents the tenth film layer, 411 represents the eleventh film layer, 412 represents the twelfth film layer, 413 represents the thirteenth film layer, 414 represents the fourteenth film layer, 415 represents the fifteenth film layer, 416 represents the sixteenth film layer, and 417 represents the seventeenth film layer.

Detailed ways

The present invention will be described in detail below with reference to examples to facilitate those skilled in the art to understand the present invention. It is necessary to specifically point out here that the examples are only used to further illustrate the present invention and cannot be understood as limiting the protection scope of the present invention. Those skilled in the art can make non-essential improvements and modifications to the present invention based on the above-mentioned content of the invention. The adjustment should still fall within the protection scope of the present invention. At the same time, the raw materials mentioned below that are not described in detail are all commercially available products; the process steps or preparation methods that are not mentioned in detail are all process steps or preparation methods known to those skilled in the art.

Example 1: Bent steel triple silver glass

As shown in FIG. 1 , the bent steel three-silver glass of this embodiment includes a first glass substrate 100 and a bent steel coating layer. The bent steel coating layer is compounded on the surface of the first glass substrate 100 .

Among them: the bent steel coating layer includes the first dielectric combination layer 201 (composed of SiZrN layer and ZnAlO layer, and the innermost layer is SiZrN layer), the first Ag protective layer 202 (composed of NiCr layer and Ti layer) from the inside to the outside. Composite), first Ag layer 203 (Ag layer), second Ag protective layer 204 (composited of NiCr layer and Ti layer), first crystal bed dielectric layer 205 (AZO layer), second dielectric combination layer 206 (composed of ZnSnO layer, ZnAlO layer, ZnAlO layer), second Ag layer 207 (Ag layer), third Ag protective layer 208 (composed of NiCr layer and Ti layer), second crystal bed dielectric layer 209 (AZO layer), the third dielectric combination layer 210 (composed of a ZnSnO layer, a ZnAlO layer, and a ZnAlO layer), the third Ag layer 211 (Ag layer), and the fourth Ag protective layer 212 (composed of a NiCr layer and a Ti layer Composite), the third crystal bed dielectric layer 213 (AZO layer), the fourth dielectric combination layer 214 (composed of SiZrN layer, SiN layer, ZrO layer and SiZrO layer, and the outermost layer is a ZrO layer and a SiZrO layer ).

A method for preparing bent steel triple silver glass, which is characterized in that it includes the following steps:

Magnetron sputtering technology is used to plate the curved steel coating layer on the surface of the first glass substrate 100 (6mm white glass). The specific coating process of the curved steel coating layer is shown in Table 1; after the coating is completed, it is tempered. Finally, Aubertech's GSTR spectral transmittance and reflectance online scanning spectrometric measurement system was used to test the tempered color. The results are shown in Table 2.

Among them: when the sputtering gas is Ar+N ₂ , the sputtering atmosphere flow ratio Ar:N ₂ =800:700sccm; when the sputtering gas is Ar+O ₂ , the sputtering atmosphere flow ratio Ar: O ₂ =500:1000sccm; when the target material is ZnSn+ZnAl, the film thickness ratio of ZnSnO and ZnAlO formed is 0.5-2:1; when the target material is SiZr+SiAl, the film thickness ratio of SiZrN and SiN formed The film thickness ratio is 0.5-2:1; when the target material is NiCr+Ti, the film thickness ratio of NiCr and Ti formed is 0.5-2:1.

Table 1:

Table 2:

It can be seen from Table 2 that the bent steel triple silver glass produced in this example is blue.

Example 2: Flat steel triple silver glass

The flat steel three-silver glass in this embodiment includes a second glass substrate 300 and a flat steel coating layer, and the flat steel coating layer is compounded on the surface of the second glass substrate 300 .

Among them: the flat steel coating layer includes the first film layer 401 (SiZrN layer), the second film layer 402 (ZnAlO) layer, the third film layer 403 (Ag layer), and the fourth film layer 404 (made of NiCr layer) from the inside to the outside. and Ti layer), the fifth film layer 405 (AZO layer), the sixth film layer 406 (composed of SiZrN layer and SiN layer), the seventh film layer 407 (composited of ZnSnO layer and ZnAlO layer) ), the eighth film layer 408 (Ag layer), the ninth film layer 409 (composed of NiCr layer and Ti layer), the tenth film layer 410 (AZO layer), the eleventh film layer 411 (composed of SiZrN layer and SiN layer composite), the twelfth film layer 412 (composed of ZnSnO layer and ZnAlO layer), the thirteenth film layer 413 (Ag layer), the fourteenth film layer 414 (composited of NiCr layer and Ti layer ), the fifteenth film layer 415 (AZO layer), the sixteenth film layer 416 (composed of a SiZrN layer and a SiN layer), the seventeenth film layer 417 (composed of a ZrO layer and a SiZrO layer) .

A method for preparing flat steel triple silver glass, which is characterized in that it includes the following steps:

A flat steel coating layer is plated on the surface of the second glass substrate 300 (6 mm white glass) using magnetron sputtering technology. The specific coating process of the flat steel coating layer is shown in Table 3; after the coating is completed, it is tempered. The color after tempering is shown in Table 4. Moreover, the flow ratios of different sputtering gases and the film thickness ratios of the composite target materials are the same as those in Example 1.

table 3:

Table 4:

It can be seen from Table 4 that the flat steel three-silver glass prepared in this example also appears blue, that is, the curved steel three-silver glass prepared in Example 1 and Example 2 has a good matching degree with the flat steel three-silver glass prepared under different processes. The colors of curved steel and flat steel triple silver glass are very close, and their properties are basically the same.

Example 3: Flat and curved integrated three-silver laminated insulating glass

The bent steel three-silver glass prepared in Example 1 and the flat steel three-silver glass prepared in Example 2 were laminated and hollowed out to obtain the flat-bent integrated three-silver laminated insulating glass of this embodiment.

The flat and curved integrated three-silver laminated insulating glass prepared in this example was tested for thermal performance (according to the standard JGJ151-2008). The test results were: the visible light transmittance Tv was 51, the external reflectivity was 17, and the internal reflectivity was 21, the shading coefficient Sc is 0.29, and the light-to-heat ratio is 2.01. It can be seen from this that the flat-bent integrated three-silver laminated insulating glass produced in this embodiment achieves excellent energy-saving effects.

Comparative example 1

The only difference between Comparative Example 1 and Embodiment 1 is that the second dielectric combination layer of Comparative Example 1 is a composite film layer composed of SiN, ZnSnO and ZnAlO.

Comparative example 2

The only difference between Comparative Example 2 and Example 1 is that the third dielectric combination layer of Comparative Example 2 is a composite film layer composed of SiN, ZnSnO and ZnAlO.

The bent steel triple silver glass samples prepared in Example 1 and Comparative Examples 1-2 were subjected to a wear resistance test (according to the standard GB-T18915.2-2013). It was found that the samples of Comparative Examples 1-2 had better wear resistance before and after the test. The absolute values of the difference in visible light transmittance are 16% and 17% respectively, both greater than 4%, that is, the wear resistance does not meet the national standards; and the absolute value of the difference in visible light transmittance of the sample of Example 1 before and after the test It is 3.2%, less than 4%, in line with national standards.

Comparative example 3

The only difference between Comparative Example 3 and Example 1 is that the innermost layer of the bent steel coating layer of Comparative Example 3 is a SiN layer.

The results showed that the curved steel three-silver glass prepared in Comparative Example 3 had surface defects after tempering, such as watermarks on the original glass, foam strips on the spacers, suction cup marks, etc., which all appeared to varying degrees. However, the Example 1, these surface defects do not appear.

Comparative example 4

The only difference between Comparative Example 4 and Example 2 is that the NiCr+Ti layer in the flat steel coating layer of Comparative Example 4 is sputtered by Ar.

The color changes of the flat steel three-silver glass prepared in Comparative Example 4 after tempering are shown in Table 5.

table 5:

It can be seen from Table 4 and Table 5 that for flat steel three-silver tempered glass, adding a certain amount of oxygen into the protective layer NiCr/Ti plays a significant role in matching the color of the final product.

For those of ordinary skill in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention without having to go through creative work. Therefore, simple improvements made by those skilled in the art to the present invention based on the disclosure of the present invention should be within the protection scope of the present invention. The above-mentioned embodiments are preferred embodiments of the present invention. All processes similar to those of the present invention and equivalent changes should fall within the protection scope of the present invention.

Claims (10)

1. A kind of bent steel three-silver glass, characterized in that it includes a first glass substrate and a bent steel coating layer, and the bent steel coating layer is compounded on the surface of the first glass substrate; The bent steel coating layer includes a first dielectric combination layer, a first Ag protective layer, a first Ag layer, a second Ag protective layer, a first crystal bed dielectric layer, a second dielectric combination layer, and a second Ag protective layer in order from the inside to the outside. layer, a third Ag protective layer, a second crystal bed dielectric layer, a third dielectric combination layer, a third Ag layer, a fourth Ag protective layer, a third crystal bed dielectric layer, and a fourth dielectric combination layer; The second dielectric combination layer and the third dielectric combination layer are oxide combination layers, and the oxide combination layer is at least two of a ZnSnO layer, a ZnAlO layer, and a ZnSnO and ZnAlO composite layer. 2. The bent steel three-silver glass according to claim 1, wherein the first dielectric combination layer is at least two of a SiZrN layer, a SiN layer, and a ZnAlO layer, and the last layer of the bent steel coating layer is The inner layer is SiZrN layer. 3. The bent steel three-silver glass according to claim 1, wherein the fourth dielectric combination layer is a nitride layer and an oxide layer, and the outermost layer of the bent steel coating layer is an oxide layer. ; The nitride layer is a SiZrN layer and/or SiN layer, and the oxide layer is a SiZrO layer and/or ZrO layer. 4. The bent steel triple silver glass according to claim 1, characterized in that the first Ag protective layer, the second Ag protective layer, the third Ag protective layer and the fourth Ag protective layer All are Ti layer and/or NiCr layer. 5. The bent steel triple silver glass according to claim 1, characterized in that the first crystal bed dielectric layer, the second crystal bed dielectric layer and the third crystal bed dielectric layer are all AZO layers. 6. The bent steel triple silver glass according to any one of claims 1 to 5, characterized in that the thickness of the second dielectric combination layer is 40-70nm; and/or the thickness of the third dielectric combination layer The thicknesses are 40-80nm respectively. 7. A method for preparing the bent steel triple silver glass according to any one of claims 1 to 6, characterized in that it includes the following steps: Coating the surface of the first glass substrate to form a first dielectric combination layer, a first Ag protective layer, a first Ag layer, a second Ag protective layer, and a first crystal layer in sequence from the inside to the outside. Bed dielectric layer, second dielectric combination layer, second Ag layer, third Ag protective layer, second crystal bed dielectric layer, third dielectric combination layer, third Ag layer, fourth Ag protective layer, third crystal bed medium layer and the fourth dielectric combination layer; and then tempered to obtain the bent steel three-silver glass. 8. The preparation method of bent steel three-silver glass according to claim 7, characterized in that the coating adopts a magnetron sputtering process, and the second dielectric combination layer and the third dielectric combination layer adopt argon gas. and oxygen sputtering. 9. A flat-bent integrated three-silver laminated insulating glass, characterized in that it includes flat steel three-silver glass and curved steel three-silver glass, with a hollow interlayer between the flat steel three-silver glass and the curved steel three-silver glass. , the bent steel triple silver glass is the bent steel triple silver glass according to any one of claims 1 to 6. 10. The flat and curved integrated three-silver laminated insulating glass according to claim 9, characterized in that the flat steel three-silver glass includes a second glass substrate and a flat steel coating layer, and the flat steel coating layer is compounded with the the surface of the second glass substrate; The flat steel coating layer includes multiple film layers in sequence from the inside to the outside, wherein: the innermost layer is a SiZrN layer, the outermost layer is a SiZrO layer or a ZrO layer; the middle dielectric layer is a combination layer of nitride and oxide.