阅读说明：本技术 用于光伏背板玻璃的高反射釉料和高反射涂釉背板玻璃 (High-reflection glaze for photovoltaic back plate glass and high-reflection glazed back plate glass ) 是由 李友情 邵世强 陈林 王润 徐小明 杨文金 于 2021-01-15 设计创作，主要内容包括：本申请属于光伏玻璃技术领域,提供一种用于光伏背板玻璃的高反射釉料和高反射涂釉背板玻璃,高反射釉料包括无机颜料,无机颜料包括基础玻璃熔剂和色剂,基础玻璃熔剂中碱金属氧化物在无机颜料中的重量百分含量为5％-10％,基础玻璃熔剂中碱土金属氧化物在无机颜料中的重量百分含量为0-2％。该高反射釉料用于在光伏背板玻璃上形成高反射釉层,通过减少高反射釉料中碱金属氧化物和碱土金属氧化物的含量能够提高高反射釉料的耐酸性腐蚀能力,解决双玻组件中高反射涂釉背板玻璃的高反射釉层被腐蚀脱落的问题。(The application belongs to the technical field of photovoltaic glass, and provides a high-reflection glaze material for photovoltaic back plate glass and high-reflection glazed back plate glass, wherein the high-reflection glaze material comprises inorganic pigment, the inorganic pigment comprises a basic glass fusing agent and a coloring agent, the weight percentage content of alkali metal oxide in the basic glass fusing agent in the inorganic pigment is 5% -10%, and the weight percentage content of alkali earth metal oxide in the basic glass fusing agent in the inorganic pigment is 0-2%. The high-reflection glaze is used for forming a high-reflection glaze layer on photovoltaic backboard glass, the acid corrosion resistance of the high-reflection glaze can be improved by reducing the content of alkali metal oxide and alkaline earth metal oxide in the high-reflection glaze, and the problem that the high-reflection glaze layer of the high-reflection glazed backboard glass in the double-glass component is corroded and falls off is solved.)

1. The high-reflection glaze for photovoltaic back plate glass is characterized by comprising inorganic pigments, wherein the inorganic pigments comprise a base glass fusing agent and a pigment agent, the weight percentage of alkali metal oxides in the base glass fusing agent in the inorganic pigments is 5-10%, and the weight percentage of alkali metal oxides in the base glass fusing agent in the inorganic pigments is 0-2%.

2. The high reflection glaze of claim 1 wherein the base glass flux further comprises SiO₂、B₂O₃、Al₂O₃And ZrO₂The inorganic pigment comprises, by weight, 10% -20%, 2% -5% and 1% -5%.

3. The high-reflection glaze according to claim 1 or 2, wherein the pigment comprises 42-55 wt% of titanium dioxide and 15-20 wt% of zinc oxide.

4. The high-reflective glaze according to claim 3 wherein the base glass fusing agent and the colorant are present in the inorganic pigment in amounts of 40% and 60% by weight, respectively.

5. The high-reflective glazing as claimed in claim 1 or 2, characterized in that said inorganic pigments further comprise additives.

6. The high-reflection glaze according to claim 5, wherein said additive is P₂O₅And V₂O₅The inorganic pigment comprises 1-3 wt% and 1-3 wt% of the inorganic pigment respectively.

7. The high-reflective glaze according to claim 1 or 2 wherein the high-reflective glaze further comprises varnish.

8. The high-reflective glaze according to claim 7 wherein the varnish is an aqueous acrylic resin or an aqueous polyester resin.

9. The high-reflection glaze according to claim 3, wherein the titanium dioxide is rutile titanium dioxide, and the granularity of the titanium dioxide is less than 20 μm.

10. A high-reflection glazed back glass comprising a back glass and a high-reflection glaze layer formed on the back glass, wherein the high-reflection glaze layer is formed by curing the high-reflection glaze material according to any one of claims 1 to 9.

Technical Field

The application belongs to the photovoltaic glass field, especially relates to a high reflection glaze and high reflection glazed backplate glass for photovoltaic backplate glass.

Background

Photovoltaic power generation is based on the principle of photovoltaic effect, and solar energy is directly converted into electric energy by a solar cell to generate power. Compared with a thermal power generation mode utilizing limited traditional fuel energy sources such as natural gas, coal and the like, the photovoltaic power generation mode does not cause environmental pollution and solar energy is inexhaustible energy, and the photovoltaic power generation mode occupies an increasingly important position in the aspect of energy supply. The photovoltaic glass mainly comprises a solar cell, a glass substrate, an encapsulation film and the like, wherein the solar cell is sealed and pressed into the glass substrate by the encapsulation film, and the solar cell converts solar energy into electric energy to generate electricity.

With the advance of technology, dual glass assembly gradually gets into people's field of vision. The double-glass assembly adopts the high-reflection glazed back plate glass to replace a traditional back plate, the high-reflection glazed back plate glass forms a high-reflection glaze layer on the back plate glass, sunlight penetrating through gaps of the solar cell pieces is reflected to the surface of the solar cell pieces by the aid of the high-reflection glaze layer, the sunlight can be secondarily utilized, and generating capacity and generating efficiency are improved.

However, when the high-reflection glazed back plate glass prepared by using the existing high-reflection glaze is applied to the dual-glass assembly, the high-reflection glaze layer of the high-reflection glazed back plate glass can be slowly corroded, and the high-reflection glaze layer can fall off, so that the dual-glass assembly is glued.

Disclosure of Invention

The application provides a high reflection glaze and high reflection glaze-coated backplate glass for photovoltaic backplate glass, can solve the problem that the high reflection glaze layer of the high reflection glaze-coated backplate glass among the prior art is corroded and drops.

In a first aspect, a high-reflection glaze for photovoltaic back panel glass is provided, which comprises inorganic pigments, wherein the inorganic pigments comprise a base glass fusing agent and a pigment agent, the weight percentage of alkali metal oxide in the base glass fusing agent in the inorganic pigments is 5% -10%, and the weight percentage of alkali earth metal oxide in the base glass fusing agent in the inorganic pigments is 0-2%.

The high-reflection glaze provided by the application is used for forming a high-reflection glaze layer on photovoltaic backboard glass to form high-reflection glazed backboard glass, the high-reflection glaze comprises inorganic pigment, the inorganic pigment comprises basic glass flux and a coloring agent, and the weight percentage of alkali metal oxide and alkaline earth metal oxide in the basic glass flux is 5% -10% and 0-2% respectively. The alkali metal oxide and the alkaline earth metal oxide can be separated from H in the acidic substance precipitated in the aging process of the packaging film⁺The ion reaction, this application has reduced the content of alkali metal oxide and the content of alkaline earth metal oxide, therefore the high reflection glaze layer is difficult to take place the reaction with the acid material that the packaging film released for the structure of high reflection glaze layer is more stable is difficult to receive the erosion of acid, has improved the ability of acid corrosion resistance of high reflection glaze.

Furthermore, the high reflection glazed backplate glass that the high reflection glaze that utilizes this application to prepare has better acid corrosion resistance's ability, and the high reflection glaze layer can not break away from with backplate glass for the adhesion of high reflection glazed backplate glass and other subassemblies is good, has guaranteed that dual glass assembly can not come unstuck, can reach predetermined life, brings better economic benefits.

Optionally, the base glass flux further comprises SiO₂、B₂O₃、Al₂O₃And ZrO₂The weight percentages of the inorganic pigment are respectively 10% -20%, 2% -5% and 1% -5%.

By adjusting the ratio of each component in the basic glass flux, the acid corrosion resistance can be improved, and other properties such as hardness, tensile strength, pressure resistance and the like can be balanced.

The pigment comprises 42-55% of titanium dioxide and 15-20% of zinc oxide by weight in inorganic pigment.

The pigment is a colorant of inorganic pigment, and the titanium dioxide is a main pigment, so that the high-reflection glaze material is white, the high-reflection glaze layer prepared by the high-reflection glaze material has higher reflectivity and better covering power, and the utilization rate of sunlight is improved. The zinc oxide is added in the high-reflection glaze as an auxiliary whitening agent, so that the high-reflection glaze layer has better covering power, and has a certain reflection effect, and the utilization rate of light can be improved, so that the power generation efficiency is improved.

Optionally, rutile titanium dioxide is selected as the titanium dioxide, and the granularity of the titanium dioxide is below 20 μm.

Optionally, the inorganic pigment further comprises an additive, wherein the additive is represented by P₂O₅And V₂O₅The weight percentage of the components in the inorganic pigment is 1 to 3 percent and 1 to 3 percent respectively.

The additive is added into the inorganic pigment, so that the high-reflection glaze has better performances in the aspects of covering power, reflectivity and the like.

Further, the high-reflection glaze also comprises varnish. The varnish is generally a polymer resin in a fluid state, and is classified into an aqueous varnish and an oil varnish according to application conditions.

The ink-regulating oil is selected from water-based ink-regulating oil, such as water-based acrylic resin or water-based polyester resin.

In a second aspect, there is provided a high-reflection glazed back plate glass, comprising a back plate glass and a high-reflection glaze layer formed on the back plate glass, wherein the high-reflection glaze layer is formed by curing the high-reflection glaze provided in the first aspect.

Since the high-reflection glazed back plate glass comprises the high-reflection glaze layer formed by curing the high-reflection glaze provided by the first aspect, the high-reflection glazed glass also has the corresponding technical effect of the high-reflection glaze, and the details are not repeated herein.

Drawings

FIG. 1 is a schematic structural view of a dual glass assembly, wherein (a) is a schematic layered structure and (b) is a schematic overall structure.

Reference numerals:

1. high-reflection glazed back plate glass; 2. packaging the film; 3. a solar cell sheet; 4. a glass substrate.

Detailed Description

In the description of the present application, it should be noted that the term "and/or" is only one kind of association relationship describing an associated object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone.

The weight of the related components mentioned in the description of the embodiments of the present application may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present application as long as it is scaled up or down according to the description of the embodiments of the present application. Specifically, the mass described in the specification of the embodiments of the present application may be a mass unit known in the chemical industry field such as μ g, mg, g, kg, etc.

The high-reflection glazed back plate glass comprises back plate glass and a high-reflection glaze layer formed on the back plate glass, wherein the high-reflection glaze layer is formed by curing high-reflection glaze materials and has high reflectivity, and the high-reflection glazed back plate glass is applied to a double-glass assembly, can reflect sunlight to a solar cell piece for secondary utilization, and improves the power generation efficiency and the power generation capacity.

When the applicant independently carries out a high-pressure accelerated aging test (PCT) on the high-reflection glazed backboard glass, the glaze layer does not fall off; when PCT is carried out after the high-reflection glazed back plate glass interlayer (namely the whole dual-glass assembly), the situation that the high-reflection glaze layer falls off is creatively found, the high-reflection glaze layer is separated from the back plate glass, so that the dual-glass assembly is separated from the back plate glass, the normal service life cannot be reached, and the dual-glass assembly is scrapped in advance.

Based on the creative discovery, the applicant deeply analyzes the reason of the glaze layer falling off and discovers that the EVA (polyethylene vinyl acetate) film and the POE (polyolefin elastomer) film which mainly encapsulate the solar cell piece are subjected to the aging processAcidic substances such as acetic acid and the like are released in the high-reflection glaze layer, so that the high-reflection glaze layer is corroded, the structure of the glaze layer is loosened, and the high-reflection glaze layer is separated from the back plate glass. The raw material of the high-reflection glaze material comprises a basic glass flux taking quartz as a main structure, wherein the quartz is a main component of a glass network, and in order to reduce the Si-O coordination number in the glass, play a role in breaking the network and reduce the melting temperature, alkali metal oxide and/or alkaline earth metal oxide are required to be added into the raw material, and the alkali metal oxide and/or alkaline earth metal oxide can be mixed with H in an acidic substance released by a packaging film⁺The ion exchange leads to the loosening of the glass structure, so that the high-reflection glaze layer can be peeled off when being corroded by acidic substances.

Based on the above creativity discovery, the applicant improves the acid corrosion resistance of the high-reflection glaze by reducing the addition amount of the alkali metal oxide and the alkaline earth metal oxide, the content of the alkali metal oxide and the alkaline earth metal oxide also influences the performances of the high-reflection glaze, such as expansion coefficient, hardness, tension resistance, pressure resistance and the like, and the acid corrosion resistance of the high-reflection glaze is improved while other performance requirements are met.

The embodiment of the application provides a high-reflection glaze material which is used for photovoltaic backboard glass and comprises an inorganic pigment, wherein the inorganic pigment comprises a basic glass fusing agent and a coloring agent, the basic glass fusing agent comprises alkali metal oxide and alkaline earth metal oxide, and the weight percentage of the alkali metal oxide and the alkaline earth metal oxide in the inorganic pigment is 5% -10% and 0-2% respectively. Illustratively, the alkali metal oxide may be present in an amount of 5%, 7% or 10% by weight; the alkaline earth metal oxide may be present in an amount of 0, 1% or 2% by weight.

The high-reflection glaze provided by the embodiment of the application is used for forming a high-reflection glaze layer on photovoltaic backboard glass to form high-reflection glazed backboard glass, the high-reflection glaze mainly comprises inorganic pigment, the inorganic pigment comprises a basic glass flux and a coloring agent, and the weight percentage of alkali metal oxide and alkaline earth metal oxide in the inorganic pigment in the basic glass flux is 5% -10% and 0-2% respectively. The alkali metal oxide and the alkaline earth metal oxide can be separated from H in the acidic substance precipitated in the aging process of the packaging film⁺Ion reaction, reduction of the present applicationThe content of alkali metal oxide and the content of alkaline earth metal oxide are reduced, so that the high-reflection glaze layer and the acidic substance released by the packaging film are not easy to react, the structure of the high-reflection glaze layer is stable and not easy to be corroded by acid, and the acid corrosion resistance of the high-reflection glaze is improved.

Furthermore, the high reflection glazed backplate glass that the high reflection glaze that utilizes this application to prepare has better acid corrosion resistance's ability, and the high reflection glaze layer can not break away from with backplate glass for the adhesion of high reflection glazed backplate glass and other subassemblies is good, has guaranteed that dual glass assembly can not come unstuck, can reach predetermined life, brings better economic benefits.

In the embodiment of the application, the inorganic pigment is an important component of the high-reflection glaze, and the inorganic pigment also comprises a basic glass flux and a toner, wherein the basic glass flux has the main function of combining the high-reflection glaze and the back plate glass, is melted at high temperature to form a glassy coating, and has the characteristics of corrosion resistance, good weather resistance and high viscosity; the color agent is mainly colored by high-reflection glaze, so that a glaze layer prepared by the glaze has good reflectivity, and the power generation efficiency of the dual-glass assembly can be improved. The acid corrosion resistance of the high-reflection glaze is improved by reducing the content of alkali metal oxide and alkaline earth metal oxide in the basic glass flux.

Optionally, the base glass flux further comprises SiO₂、B₂O₃、Al₂O₃And ZrO₂The weight percentages of the inorganic pigment are respectively 10% -20%, 2% -5% and 1% -5%. Illustratively, SiO₂May be 10%, 15% or 20% by weight, B₂O₃May be 10%, 15% or 20% by weight of Al₂O₃May be 2%, 3.5% or 5% by weight, ZrO₂The weight percentage content can be 1%, 3% or 5%.

By adjusting the ratio of each component in the basic glass flux, the acid corrosion resistance can be improved, and other properties such as hardness, tensile strength, pressure resistance and the like can be balanced.

Specifically, the colorant comprises titanium dioxide and zinc oxide, and the weight percentage of the titanium dioxide and the zinc oxide in the inorganic pigment is 42-55% and 15-20% respectively. Illustratively, the content of titanium dioxide can be 42%, 49% or 55%, and the content of zinc oxide can be 15%, 17% or 20%.

The pigment is a colorant of inorganic pigment, and the titanium dioxide is a main pigment, so that the high-reflection glaze material is white, the high-reflection glaze layer prepared by the high-reflection glaze material has high reflectivity and high covering power, and the utilization rate of sunlight is improved. The embodiment of the application improves the content of the titanium dioxide and can improve the reflectivity of the high-reflection glaze layer. The zinc oxide is added in the high-reflection glaze as an auxiliary whitening agent, so that the high-reflection glaze layer has better covering power, and has a certain reflection effect, and the utilization rate of light can be improved, so that the power generation efficiency is improved.

Optionally, rutile titanium dioxide is selected as the titanium dioxide, and the granularity of the titanium dioxide is below 20 μm.

The titanium dioxide with the granularity of less than 20 mu m and rutile type has good dispersion performance, can be dispersed in the varnish more uniformly, and enables the high-reflection glaze layer to have good weather resistance.

Optionally, the colorant further includes fluorine in an amount of 0-1% by weight of the inorganic pigment, and illustratively, the fluorine may be present in an amount of 0, 0.5% or 1% by weight.

Optionally, the inorganic pigment further comprises an additive, wherein the additive is represented by P₂O₅And V₂O₅The weight percentage of the components in the inorganic pigment is 1 to 3 percent and 1 to 3 percent respectively. Exemplarily, P₂O₅May be 1%, 2% and 3% by weight; v₂O₅May be present in amounts of 1%, 2% and 3% by weight.

The additive is added into the inorganic pigment, so that the high-reflection glaze has better performances in the aspects of covering power, reflectivity and the like.

Further, the high-reflection glaze also comprises varnish. The varnish is generally a polymer resin in a fluid state, and is classified into an aqueous varnish and an oil varnish according to application conditions. The inorganic pigment is uniformly dispersed in the varnish to jointly form the high-reflection glaze. In the examples of the present application, an aqueous varnish is selected, such as an aqueous acrylic resin, an aqueous polyester resin, or other aqueous varnishes commonly used in the art.

The inorganic pigment is generally a powdery substance, the varnish is generally an organic solvent, the inorganic pigment is dissolved in the varnish to form a high-reflection glaze, and the high-reflection glaze is formed on the back plate glass by a high-reflection glaze curing process.

Example one

The inorganic pigment comprises the following components in percentage by weight, based on the total weight of the inorganic pigment as 100 percent:

40% of basic glass flux;

60% of a color agent;

the ink mixing oil is water-based acrylic resin;

wherein SiO in the base glass flux₂、B₂O₃、Al₂O₃、ZrO₂The weight percentages of the alkali metal oxide and the alkaline earth metal oxide are respectively 13%, 5%, 2%, 7% and 0; the weight percentage content of titanium dioxide and zinc oxide in the colorant is 45 percent and 15 percent respectively.

Example two

The inorganic pigment comprises the following components in percentage by weight, based on the total weight of the inorganic pigment as 100 percent:

33% of basic glass flux;

65% of a color agent;

2% of an additive;

the ink mixing oil is water-based polyester resin;

wherein SiO in the base glass flux₂、B₂O₃、Al₂O₃、ZrO₂The weight percentages of the alkali metal oxide and the alkaline earth metal oxide are respectively 12%, 11%, 3%, 1%, 5% and 1%; the weight percentage content of the titanium dioxide and the zinc oxide in the toner is respectively 48 percentAnd 17%; in additives P₂O₅And V₂O₅The weight percentage of the components is 1 percent and 1 percent respectively.

EXAMPLE III

The inorganic pigment comprises the following components in percentage by weight, based on the total weight of the inorganic pigment as 100 percent:

28% of basic glass flux;

70% of a color agent;

2% of an additive;

the ink mixing oil is water-based acrylic resin;

wherein SiO in the base glass flux₂、B₂O₃、Al₂O₃、ZrO₂The weight percentages of the alkali metal oxide and the alkaline earth metal oxide are respectively 10%, 2%, 1%, 5% and 0; the weight percentage content of titanium dioxide and zinc oxide in the colorant is 50 percent and 20 percent respectively; in additives P₂O₅And V₂O₅The weight percentage of the components is 1 percent and 1 percent respectively.

Example four

The inorganic pigment comprises the following components in percentage by weight, based on the total weight of the inorganic pigment as 100 percent:

38% of basic glass flux;

58% of a color agent;

4% of an additive;

the ink mixing oil is water-based acrylic resin;

wherein SiO in the base glass flux₂、B₂O₃、Al₂O₃、ZrO₂The weight percentages of the alkali metal oxide and the alkaline earth metal oxide are respectively 12%, 10%, 3%, 1%, 10% and 2%; the weight percentage contents of titanium dioxide, zinc oxide and fluorine in the colorant are respectively 42%, 15% and 1%; in additives P₂O₅And V₂O₅The weight percentage of the components is 2 percent and 2 percent respectively.

When preparing the high-reflection glaze, the inorganic pigment is uniformly dispersed in the varnish, uniformly stirred and mixed to obtain the high-reflection glaze.

The embodiment of the application also provides high-reflection glazed back plate glass, which comprises back plate glass and a high-reflection glaze layer formed on the back plate glass, wherein the high-reflection glaze layer is formed by curing the high-reflection glaze.

The high-reflection glaze layer of the high-reflection glazed back plate glass provided by the embodiment of the application is formed by curing the high-reflection glaze, so that the high-reflection glazed back plate glass also has better acid corrosion resistance. This high reflection glaze layer of high reflection glaze-coated backplate glass can not break away from with backplate glass for the adhesion of high reflection glaze-coated backplate glass and other subassemblies is good, has guaranteed that dual glass assembly can not come unstuck, can reach predetermined life.

The preparation process of the high-reflection glazed back plate glass comprises the following steps:

(1) edging the backboard glass (patterned glass) with required specification by adopting a C-shaped edge;

(2) after edging, positioning and drilling by using a laser drilling machine, wherein the drilling surface is a suede surface;

(3) after drilling, the back plate glass is turned over by a turnover machine to enable the embossed surface of the back plate glass to face upwards and enters a cleaning machine for cleaning;

(4) after drying, entering a screen printing room, printing a high-reflection glaze material on the embossed surface of the back plate glass through a screen printing machine, and forming a high-reflection glaze layer through a curing furnace;

(5) and then passing through a toughening furnace, wherein the furnace temperature of the toughening furnace is 695-710 ℃, and the toughening time is 100-115 seconds, so as to form the high-reflection glazed back plate glass.

In the embodiment of the application, when the tempering is carried out in the step (5) of the preparation process, the temperature of the tempering furnace is increased by 5-10 ℃, so that the prepared glaze layer of the high-reflection glazed back plate glass has better adhesive force.

Optionally, the thickness of the high reflection glaze layer is 15-35 microns, and illustratively, the thickness of the high reflection glaze layer may be 15 microns, 25 microns, or 35 microns.

Optionally, the thickness of the back plate glass is 2.0-2.5 mm, and exemplarily, the thickness of the back plate glass may be 2.0 mm, 2.2 mm, or 2.5 mm.

The following description will be given with reference to specific examples.

EXAMPLE five

The embodiment provides high-reflection glazed back plate glass, and the preparation process comprises the following steps:

(1) edging, drilling and cleaning the back plate glass;

(2) selecting the high-reflection glaze provided by the first embodiment;

(3) printing the high-reflection glaze material in the step (2) on the embossing surface of the back plate glass through a screen printing machine, and curing in a curing furnace to form a high-reflection glaze layer on the back plate glass;

(4) and (4) placing the product obtained in the step (3) into a tempering furnace for tempering, wherein the furnace temperature is 710 ℃, and the tempering time is 115 seconds, so that the high-reflection glazed back plate glass is obtained.

EXAMPLE six

The embodiment provides high-reflection glazed back plate glass, and the preparation process comprises the following steps:

(1) edging, drilling and cleaning the back plate glass;

(2) selecting the high-reflection glaze provided by the second embodiment;

(3) printing the high-reflection glaze material in the step (2) on the embossing surface of the back plate glass through a screen printing machine, and curing in a curing furnace to form a high-reflection glaze layer on the back plate glass;

(4) and (4) placing the product obtained in the step (3) into a toughening furnace for toughening, wherein the furnace temperature is 695 ℃, and the toughening time is 100 seconds, so as to obtain the high-reflection glazing backplane glass.

EXAMPLE seven

The embodiment provides high-reflection glazed back plate glass, and the preparation process comprises the following steps:

(1) edging, drilling and cleaning the back plate glass;

(2) selecting the high-reflection glaze provided by the second embodiment;

(3) printing the high-reflection glaze material in the step (2) on the embossing surface of the back plate glass through a screen printing machine, and curing in a curing furnace to form a high-reflection glaze layer on the back plate glass;

(4) and (4) placing the product obtained in the step (3) into a toughening furnace for toughening, wherein the furnace temperature is 702 ℃, and the toughening time is 108 seconds, so as to obtain the high-reflection glazed back plate glass.

Example eight

The embodiment of the application provides high-reflection glazed back plate glass, and the preparation process of the high-reflection glazed back plate glass is basically the same as the steps of the fifth embodiment, and the difference is that: the high-reflection glaze provided in example three was selected in step (2).

Example nine

The embodiment of the application provides high-reflection glazed back plate glass, and the preparation process of the high-reflection glazed back plate glass is basically the same as the steps of the sixth embodiment, and the difference is that: the high-reflection glaze provided in example four was selected in step (2).

FIG. 1 is a schematic structural view of a dual glass assembly, wherein (a) is a schematic structural view of a layered structure of the dual glass assembly, and (b) is a schematic structural view of the entire dual glass assembly. As shown in fig. 1, the dual glass assembly includes a high-reflection glazed back plate glass 1, a glass substrate 4, two packaging films 2 and a solar cell 3, wherein the solar cell 3 is packaged by the two packaging films 2 and is located between the high-reflection glazed back plate glass 1 and the glass substrate 4.

Here, the highly reflective glazed back sheet glass 1 in fig. 1 is prepared by any one of the five to nine examples described above.

The high-reflection glazed back plate glass prepared by the high-reflection glaze material provided by the embodiment of the application through the process has good performance, the reflectivity of the high-reflection glaze layer is improved by 1-2%, the adhesive force of the high-reflection glaze layer is ensured to be in level 1, the acid corrosion resistance is met, and the high-reflection glaze layer cannot fall off after being soaked in acid with the concentration of 1mol/L for 24 hours.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.