A high-impact, high-transparency inorganic composite coating and its preparation method

Abstract

This invention discloses a high-impact, high-transparency inorganic composite coating and its preparation method. The inorganic composite coating comprises inorganic coating A and inorganic coating B. Inorganic coating A is coated on a base glass, and inorganic coating B is coated on top of inorganic coating A. Inorganic coating A comprises inorganic powder A and a film-forming agent, and inorganic coating B comprises inorganic powder B and a film-forming agent. The coefficients of thermal expansion among the base glass, inorganic coating A, and inorganic coating B exhibit a stepped relationship. Both inorganic powder A and inorganic powder B contain antimony oxide, and the raw material for inorganic coating B also contains cerium oxide. The inorganic composite coating of this invention possesses high impact resistance and high transparency.

Description

Technical Field

[0001] This invention relates to a high-impact, high-transparency inorganic composite coating and its preparation method, belonging to the field of inorganic coating technology. Background Technology

[0002] Inorganic composite coatings are stable coatings obtained by applying two or more different materials to glass and then tempering and shaping it. The materials consist of a mixture of inorganic powders and a film-forming agent. Glass coated with this inorganic composite coating is suitable for applications in construction, home appliances, automobiles, photovoltaics, and other fields, providing corresponding decorative properties or other special properties.

[0003] In the aforementioned applications, the inorganic composite coating needs to possess good impact resistance to withstand impacts and collisions caused by human or natural factors, thereby improving the safety of the operating environment and extending its service life. Furthermore, some application conditions require the coating to have good transmittance, increasing visible light transmittance, and to exhibit bright and vivid colors when blended with other pigments. Therefore, the coating also needs good transmittance to meet these requirements. However, existing inorganic coatings have poor impact resistance and cannot meet the requirements for high impact resistance; their poor transmittance also fails to meet the requirement for high visible light transmittance; and the addition of pigments results in a dull and lackluster coating color. Summary of the Invention

[0004] In response to at least one problem in the existing technology, the present invention provides an inorganic composite coating with high impact resistance and high transparency, and its preparation method is simple and environmentally friendly.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-impact-resistant and high-transparency inorganic composite coating, comprising an inorganic coating A and an inorganic coating B, wherein the inorganic coating A is coated on the base glass and the inorganic coating B is coated on the inorganic coating A;

[0006] The coefficient of thermal expansion of inorganic coating A is 7.5–8 × 10⁻⁶. -6 At / ℃, the coefficient of thermal expansion of inorganic coating B is 6.5~7.1*10. -6 / ℃; and both inorganic coating A and inorganic coating B contain antimony oxide in their raw materials, while inorganic coating B also contains cerium oxide in its raw materials.

[0007] Preferably, the inorganic coating A comprises inorganic powder A and a film-forming agent.

[0008] Preferably, inorganic powder A comprises silicon oxide, boron oxide, zinc oxide, magnesium oxide, barium oxide, titanium oxide, antimony oxide, and alkali metal oxides; wherein the mass percentage of antimony oxide is 1-2.5% of the mass of inorganic powder A, and the mass percentage of alkali metal oxides is 13-20% of the mass of inorganic powder A.

[0009] Preferably, in inorganic powder A, the alkali metal oxide is one or both of potassium oxide and sodium oxide, wherein potassium oxide accounts for 0-18% of the mass of inorganic powder A, and sodium oxide accounts for 0-16% of the mass of inorganic powder A.

[0010] Preferably, inorganic powder A comprises the following raw materials, by mass fraction: silicon oxide 33-53%, boron oxide 5-19%, sodium oxide 0-16%, zinc oxide 8-17%, magnesium oxide 0-6%, barium oxide 1-9%, potassium oxide 0-18%, titanium oxide 3-10%, and antimony oxide 1-2.5%; wherein the sum of the mass of sodium oxide and potassium oxide accounts for 13-20% of the mass of inorganic powder A.

[0011] Preferably, the inorganic coating B comprises inorganic powder B and a film-forming agent.

[0012] Preferably, inorganic powder B comprises silicon oxide, boron oxide, zinc oxide, magnesium oxide, barium oxide, titanium oxide, cerium oxide, antimony oxide, and alkali metal oxides; wherein, the mass percentage of cerium oxide is 0.5-1.5% of the mass of inorganic powder B, the mass percentage of antimony oxide is 1-2.5% of the mass of inorganic powder B, and the mass percentage of alkali metal oxides is 8-13% of the mass of inorganic powder B.

[0013] Preferably, in inorganic powder B, the alkali metal oxide is one or both of potassium oxide and sodium oxide, wherein potassium oxide accounts for 0-11% of the mass of inorganic powder B, and sodium oxide accounts for 0-13% of the mass of inorganic powder B.

[0014] Preferably, inorganic powder B comprises the following raw materials, by mass fraction: silicon oxide 36-52%, boron oxide 7-23%, sodium oxide 0-11%, zinc oxide 5-11%, magnesium oxide 0.5-6%, barium oxide 0-12%, potassium oxide 0-13%, titanium oxide 8-21%, cerium oxide 0.5-1.5%, and antimony oxide 1-2.5%; wherein the sum of the mass of sodium oxide and potassium oxide accounts for 8-13% of the mass of inorganic powder B.

[0015] Preferably, the inorganic composite coating can withstand an impact of a 500g steel ball from a height of at least 2.5m without breaking the glass printed with the inorganic composite coating, and the transparency of the glass printed with the inorganic composite coating is reduced by less than 2% compared with the transparency of the base glass.

[0016] This invention also provides a method for preparing a high-impact, high-transparency inorganic composite coating, comprising the following steps:

[0017] (1) Raw materials: Silicon oxide, boron oxide, zinc oxide, magnesium oxide, barium oxide, titanium oxide, antimony oxide and alkali metal oxide are mixed evenly according to the mass percentage to obtain mixed powder A; Silicon oxide, boron oxide, zinc oxide, magnesium oxide, barium oxide, titanium oxide, cerium oxide, antimony oxide and alkali metal oxide are mixed evenly according to the mass percentage to obtain mixed powder B.

[0018] (2) Inorganic powder preparation: Mixed powder A and mixed powder B were placed in a muffle furnace at 1200℃ and fired for 1 hour respectively. The mixture was melted evenly and clarified to form a uniform melt. After water quenching, inorganic slag was obtained. Then, it was wet-milled for 3 hours, dried, and sieved to obtain inorganic powder A and inorganic powder B respectively.

[0019] (3) Preparation of inorganic coating slurry: Add film-forming agent to inorganic powder A and mixed powder B respectively, stir evenly, and then coarsely grind and finely grind in sequence to obtain inorganic coating slurry A and inorganic coating slurry B respectively;

[0020] (4) Inorganic composite coating preparation: First, inorganic coating paste A is printed on the base glass by screen printing and dried to form inorganic coating A. Then, inorganic coating paste B is printed on inorganic coating A by screen printing and dried to form inorganic coating B, thus obtaining a semi-finished inorganic composite coating. Next, the semi-finished inorganic composite coating is tempered to obtain an inorganic composite coating.

[0021] Preferably, the drying temperature is 150–220°C.

[0022] Preferably, the tempering temperature is 680–720°C and the tempering time is 100–400 seconds.

[0023] The beneficial effects of the present invention are as follows: 1. The inorganic composite coating of the present invention includes inorganic coating A and inorganic coating B, which have high impact resistance and high transparency. It is attached to glass through overprinting and tempering processes. The preparation process is simple, environmentally friendly and low cost.

[0024] 2. In the inorganic composite coating of the present invention, inorganic coating B achieves a lower coefficient of expansion by adding cerium oxide, and the coefficients of expansion of inorganic coatings A and B are specially designed to form a gradient of expansion coefficients with the base glass, thereby achieving high impact resistance.

[0025] 3. In the inorganic composite coating of the present invention, by controlling the addition ratio of alkali metal and antimony oxide in the inorganic coatings A and B, the coating has extremely high transparency.

[0026] 4. The inorganic composite coating of the present invention has the characteristics of high impact resistance and high transparency. It can be matched with a variety of pigments to produce bright colors and can be widely used in construction, home appliances, automobiles, photovoltaics and other fields. Detailed Implementation

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Unless otherwise specified, the experimental methods in the following examples are conventional methods, and the experimental reagents and materials involved are conventional chemical reagents and materials unless otherwise specified.

[0029] Example

[0030] A high-impact, high-transparency inorganic composite coating is prepared by the following steps:

[0031] (1) Raw materials: According to mass fraction: silicon oxide, boron oxide, zinc oxide, magnesium oxide, barium oxide, titanium oxide, antimony oxide and alkali metal oxide are mixed evenly according to mass percentage to obtain mixed powder A; silicon oxide, boron oxide, zinc oxide, magnesium oxide, barium oxide, titanium oxide, cerium oxide, antimony oxide and alkali metal oxide are mixed evenly according to mass percentage to obtain mixed powder B.

[0032] (2) Inorganic powder preparation: After raising the temperature of the muffle furnace to 1200℃, mixed powder A and mixed powder B are placed in the muffle furnace and fired for 1 hour respectively. The melt is uniform and clear to form a uniform melt. The melt is poured into deionized ice water for water quenching to obtain inorganic slag. Then, the inorganic slag is added to water and wet-milled for 3 hours in a high-speed ball mill. After drying, it is passed through a 300 mesh screen to obtain inorganic powder A and inorganic powder B respectively.

[0033] (3) Preparation of inorganic coating slurry: Add appropriate amount of film-forming agent to inorganic powder A and mixed powder B respectively, stir evenly, first coarsely grind by sand mill, and then finely grind by three-roll mill to obtain inorganic coating slurry A and inorganic coating slurry B respectively. In inorganic coating slurry A: the amount of film-forming agent added is 25-30% of the weight of inorganic powder A. In inorganic coating slurry B: the amount of film-forming agent added is 25-30% of the weight of inorganic powder B.

[0034] (4) Preparation of inorganic composite coating: Select a base glass with a size of 100*100mm and a thickness of 4mm. Print inorganic coating paste A on the base glass by screen printing. Dry it at a temperature of 150-220℃ to form coating A. Then print inorganic coating paste B on coating A by screen printing. Dry it at a temperature of 150-220℃ to form coating B. Obtain a semi-finished inorganic composite coating. Then place the semi-finished inorganic composite coating at a temperature of 680-720℃ for tempering for 100-400s to obtain the inorganic composite coating.

[0035] Preliminary Example: Inorganic Powder Preparation

[0036] 1. Different inorganic powders A are prepared according to step (1) of the embodiment of the present invention, and their raw material formulations are shown in Table 1.

[0037] Table 1 Raw material formulation for inorganic powder A

[0038]

[0039] The inorganic powder A (A-1 to A-9) was prepared into inorganic coating slurry A (A-1 to A-9) according to the preparation steps (2) and (3) of the embodiment. Then, it was printed on the base glass to form inorganic coating A according to the preparation step (4) of the embodiment. The coefficient of expansion was measured as shown in Table 2.

[0040] Table 2. Coefficient of thermal expansion and mass fraction of alkali metal oxides for inorganic coating A

[0041]

[0042] 2. Different inorganic powders B are prepared according to step (1) of the embodiment of the present invention. The raw material formula of inorganic powder B is shown in Table 3.

[0043] Table 3 Inorganic Powder B Raw Material Formulation

[0044]

[0045] The inorganic powder B (B-1 to B-11) was prepared into inorganic coating slurry B (B-1 to B-11) according to the preparation steps (2) and (3) of the embodiment. Then, it was printed on the base glass to form inorganic coating B according to the preparation step (4) of the embodiment. The coefficient of expansion was measured as shown in Table 4.

[0046] Table 4. Coefficient of thermal expansion and mass fraction of alkali metal oxides of inorganic coating B

[0047]

[0048] As can be seen from Tables 1-4, both alkali metal oxides and cerium oxide affect the coefficient of thermal expansion of inorganic coatings. Generally, the coefficient of thermal expansion of inorganic coatings increases with the increase of alkali metal oxide content and decreases with the decrease of alkali metal oxide content. However, the coefficient of thermal expansion will not change much when the alkali metal content is moderate. The addition of cerium oxide to inorganic coatings will further promote the decrease of the coefficient of thermal expansion of inorganic coatings.

[0049] Preparation of Inorganic Composite Coatings in Examples 1-7 and Comparative Examples 1-16

[0050] Inorganic powders A (A-1 to A-9) and B (B-1 to B-10) from the preliminary example were combined to prepare an inorganic composite coating according to the preparation steps (2), (3), and (4) of the example. The glass containing the inorganic composite coating prepared in Examples 1 to 7 and Comparative Examples 1 to 16 was observed. It was found that the glass containing the inorganic composite coating prepared in Comparative Examples 2, 6, 9, and 15 had impurities in color, and the color was yellowish or brownish. The glass containing the inorganic composite coating prepared in the rest was pure white without impurities. The performance of the inorganic composite coating was tested. The coating combination and performance of the inorganic composite coating are shown in Table 5.

[0051] Effect test: Inorganic composite coatings were prepared in Examples 1-7 and Comparative Examples 1-16, with 11 copies prepared for each comparative example or example using the same method.

[0052] 1. Transmittance performance test: First, the transmittance of the base glass is measured. Then, the base glass coated with an inorganic composite coating is printed on the glass plate, and the transmittance is tested with a densitometer. The transmittance is compared with that of the base glass, and the difference in transmittance is calculated. Each inorganic composite coating has 3 samples, and the average value is taken.

[0053] 2. Impact resistance test: Place 8 samples on a steel frame with rubber pads, and impact the center point of the glass surface with a 500g steel ball. Start the impact from a height of 0.1m above the glass. If the glass does not break after one impact, increase the height by 0.1m and continue the impact until the glass breaks. The height at which at least 6 out of the 8 glass samples can pass through is the impact resistance height of the coating.

[0054] Table 5. Coating combinations and properties of inorganic composite coatings

[0055]

[0056]

[0057] In Table 5 above, it should be noted that: in Comparative Example 1, inorganic powder A-1 is used instead of inorganic powder B for inorganic coating B; in Comparative Example 2, inorganic powder A-4 is used instead of inorganic powder B for inorganic coating B; and in Comparative Example 10, inorganic powder B-2 is used instead of inorganic powder A for inorganic coating A.

[0058] According to Tables 1-5 above, in Examples 1 to 7, the coefficients of thermal expansion, alkali metal content, and cerium oxide content of inorganic powders A and B are within suitable ranges. Prepared from bottom to top in the order of base glass - inorganic coating A - inorganic coating B, the impact height of a 500g steel ball on the glass printed with the inorganic composite coating is not less than 2.5m. This is because, in the order of base glass - coating A - coating B, the coefficient of thermal expansion and alkali metal content both show a stepwise decrease. During subsequent tempering, the components at the interfaces of base glass - coating A and coating A - coating B diffuse into each other, further stabilizing this stepwise trend, thus making the steel... After tempering, the compressive stress on the surface of the glass coating gradually increases. When the steel ball impacts the glass surface, a stress-resistance situation is presented, which greatly improves the impact resistance of the inorganic composite coating. At the same time, when the antimony oxide content in inorganic powders A and B is within a certain range, the transmittance of the glass printed with the inorganic composite coating is increased. Moreover, the transmittance of the glass printed with the inorganic composite coating is reduced by no less than 2% relative to the transmittance of the base glass. This is because the appropriate amount of antimony oxide has a decolorizing effect during the firing of inorganic powders, so that the tempered coating is free of impurities. In addition, controlling the amount of alkali metal added can improve the melting performance of inorganic powders, making them more transparent.

[0059] Compared to Example 1, in Comparative Example 1, the inorganic coating B used inorganic powder A-1 with a relatively large coefficient of thermal expansion and a high content of alkali metal oxides. This resulted in the inorganic coating B having the same coefficient of thermal expansion as inorganic coating A, and close to the coefficient of thermal expansion of the base glass. There was no step-like reduction in diffusion. Because the difference between the coefficient of thermal expansion of inorganic coating B and the base glass was small, the compressive stress after tempering was insufficient. Although it had a certain impact resistance with an impact height of less than 2m, it did not have a significant advantage compared to existing inorganic coatings. In addition, the inorganic composite coatings in Comparative Examples 2, 3, 5, and 8 also showed that the difference between the coefficient of thermal expansion of inorganic coating A and inorganic coating B was small, and the step-like reduction in the coefficient of thermal expansion was small, which affected the impact resistance of the inorganic composite coating.

[0060] Compared to Example 1, in Comparative Example 10, inorganic coating A used inorganic powder B-2 with a smaller coefficient of thermal expansion and lower alkali metal oxide content, resulting in inorganic coating A having the same coefficient of thermal expansion as inorganic coating B, but a significantly different coefficient of thermal expansion compared to the base glass. While there was a gradient in the coefficient of thermal expansion, the gradient was too large, leading to a significant difference in shrinkage between the inorganic composite coating and the base glass after tempering. This resulted in poor adhesion between the inorganic composite coating and the base glass, causing glass cracking and poor impact resistance of the inorganic composite coating. In Comparative Example 12, inorganic coating A used inorganic powder A-5 with a larger coefficient of thermal expansion and higher alkali metal oxide content, failing to create a gradient in the coefficient of thermal expansion and affecting the impact resistance of the inorganic composite coating. Furthermore, the large difference in the coefficient of thermal expansion between inorganic coating A and inorganic coating B in Comparative Examples 4 and 9 also indicates a large gradient in the coefficient of thermal expansion, further affecting the impact resistance of the inorganic composite coating.

[0061] Compared to Example 1, although the coefficients of thermal expansion of inorganic powder A-4 used in inorganic coating A of Comparative Example 11 and inorganic powder A-9 used in inorganic coating A of Comparative Example 16 are closer to the coefficients of thermal expansion of the base glass, and the difference between them is small and forms a gradient, inorganic powder A-4 has a lower content of alkali metal oxides. After tempering, this results in poorer adhesion between the inorganic composite coating and the base glass, affecting the impact resistance of the inorganic composite coating. Meanwhile, Comparative Example 14 further shows that the coefficient of thermal expansion of inorganic coating A is small compared to that of the base glass, and the lower content of alkali metal oxides in inorganic coating A does not improve the impact resistance of the inorganic composite coating. Moreover, compared to Comparative Example 11 and Comparative Example 16, inorganic powder A-4 does not contain antimony oxide, resulting in a significant decrease in the transmittance of the inorganic composite coating. In addition, Comparative Examples 2 and 9 also further show that the absence of antimony oxide in the inorganic powder affects the transmittance of the inorganic composite coating.

[0062] Compared to Example 1, in Comparative Example 6, the antimony oxide content in inorganic coating B-8 of inorganic coating B was less than 1%, and in Comparative Example 15, the antimony oxide content in inorganic coating A-8 of inorganic coating A was less than 1%. Although these methods achieved a decolorizing effect and improved the transparency of the inorganic coating, the excessively low antimony oxide content resulted in a poor decolorizing effect, leading to yellowing or browning discoloration. In contrast, in Comparative Example 12, the antimony oxide content in inorganic coating B-5 of inorganic coating B was greater than 2.5%, and in Comparative Example 13, the antimony oxide content in inorganic coating A-6 of inorganic coating A was greater than 2.5%. Excessive antimony oxide content leads to significant opacity in the coating, resulting in a sharp decrease in the transmittance of the inorganic composite coating relative to the base glass. Furthermore, Comparative Example 7 also shows that the antimony oxide content in inorganic coating B-9 is greater than 2.5%, affecting the transmittance of the inorganic composite coating. Moreover, it was found that compared to Comparative Example 13, increasing the content of alkali metal oxides in Comparative Example 12 can increase the transmittance of the inorganic composite coating, but it still cannot offset the opacity caused by excessive antimony oxide content. It also results in an excessively large coefficient of thermal expansion of the inorganic coating, thus affecting its impact resistance.

[0063] In summary, the inorganic powder A selected in this invention comprises the following raw materials, by mass fraction: silicon oxide 33-53%, boron oxide 5-19%, sodium oxide 0-16%, zinc oxide 8-17%, magnesium oxide 0-6%, barium oxide 1-9%, potassium oxide 0-18%, titanium oxide 3-10%, and antimony oxide 1-2.5%, wherein the sum of the masses of sodium oxide and potassium oxide accounts for 13-20% of the mass of inorganic powder A; the inorganic powder B selected in this invention comprises the following raw materials, by mass fraction: silicon oxide 36-52%, boron oxide 7-23%, sodium oxide 0-11%, zinc oxide 5-11%, magnesium oxide 0.5-6%, and antimony oxide... The inorganic composite coating, prepared by this invention, comprises 0-12% barium, 0-13% potassium oxide, 8-21% titanium oxide, 0.5-1.5% cerium oxide, and 1-2.5% antimony oxide; with the sum of the masses of sodium oxide and potassium oxide accounting for 8-13% of the mass of inorganic powder B. It is adhered to glass through overprinting and tempering processes. This invention exhibits high impact resistance and high transparency. The preparation process is simple, environmentally friendly, and low-cost. In this invention, inorganic coating B achieves a lower coefficient of thermal expansion by adding cerium oxide. The coefficients of thermal expansion of inorganic coatings A and B are specially designed to form a suitable gradient between the base glass, inorganic coating A, and inorganic coating B, achieving high impact resistance. Furthermore, by controlling the proportions of alkali metal oxides and antimony oxide in the formulations of inorganic coatings A and B, the coating achieves extremely high transparency, allowing for vibrant color development when matched with various pigments, and making it widely applicable in construction, home appliances, automobiles, photovoltaics, and other fields.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit and essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-impact, high-transparency inorganic composite coating, characterized in that, It includes inorganic coating A and inorganic coating B, wherein inorganic coating A is coated on base glass and inorganic coating B is coated on inorganic coating A; The coefficient of thermal expansion of the inorganic coating A is 7.5~8. 10 -6 The coefficient of thermal expansion of the inorganic coating B is 6.5~7.1 at / ℃. 10 -6 / ℃; and both inorganic coating A and inorganic coating B contain antimony oxide in their raw materials, while inorganic coating B also contains cerium oxide in its raw materials; The inorganic coating A and inorganic coating B form an expansion coefficient gradient with the base glass; The raw materials for the inorganic coating A include inorganic powder A and a film-forming agent; the inorganic powder A comprises silicon oxide, boron oxide, zinc oxide, magnesium oxide, barium oxide, titanium oxide, antimony oxide, and alkali metal oxides; wherein, the mass percentage of antimony oxide is 1-2.5% of the mass of inorganic powder A, and the mass percentage of alkali metal oxides is 13-20% of the mass of inorganic powder A; The raw materials for the inorganic coating B include inorganic powder B and a film-forming agent; the inorganic powder B comprises silicon oxide, boron oxide, zinc oxide, magnesium oxide, barium oxide, titanium oxide, cerium oxide, antimony oxide, and alkali metal oxides; wherein, the mass percentage of cerium oxide is 0.5-1.5% of the mass of inorganic powder B, the mass percentage of antimony oxide is 1-2.5% of the mass of inorganic powder B, and the mass percentage of alkali metal oxides is 8-13% of the mass of inorganic powder B.

2. The high-impact, high-transparency inorganic composite coating according to claim 1, characterized in that, In inorganic powder A, the alkali metal oxide is one or both of potassium oxide and sodium oxide, wherein the potassium oxide accounts for 0-18% of the mass of inorganic powder A, and the sodium oxide accounts for 0-16% of the mass of inorganic powder A.

3. The high-impact, high-transparency inorganic composite coating according to claim 1, characterized in that, The inorganic powder A comprises the following raw materials, by mass fraction: silicon oxide 33-53%, boron oxide 5-19%, sodium oxide 0-16%, zinc oxide 8-17%, magnesium oxide 0-6%, barium oxide 1-9%, potassium oxide 0-18%, titanium oxide 3-10%, and antimony oxide 1-2.5%; wherein the sum of the masses of sodium oxide and potassium oxide accounts for 13-20% of the mass of inorganic powder A.

4. The high-impact, high-transparency inorganic composite coating according to claim 1, characterized in that, In inorganic powder B, the alkali metal oxide is one or both of potassium oxide and sodium oxide, wherein the potassium oxide accounts for 0-11% of the mass of inorganic powder B, and the sodium oxide accounts for 0-13% of the mass of inorganic powder B.

5. The high-impact, high-transparency inorganic composite coating according to claim 1, characterized in that, The inorganic powder B comprises the following raw materials, by mass fraction: silicon oxide 36-52%, boron oxide 7-23%, sodium oxide 0-11%, zinc oxide 5-11%, magnesium oxide 0.5-6%, barium oxide 0-12%, potassium oxide 0-13%, titanium oxide 8-21%, cerium oxide 0.5-1.5%, and antimony oxide 1-2.5%; wherein the sum of the masses of sodium oxide and potassium oxide accounts for 8-13% of the mass of inorganic powder B.

6. The high-impact, high-transparency inorganic composite coating according to claim 1, characterized in that, The inorganic composite coating can withstand an impact of a 500g steel ball from a height of at least 2.5m without breaking the glass printed with the inorganic composite coating, and the transparency of the glass printed with the inorganic composite coating is reduced by less than 2% compared with the transparency of the base glass.

7. A method for preparing a high-impact, high-transparency inorganic composite coating as described in claim 1, characterized in that, Includes the following steps: (1) Raw materials: Silicon oxide, boron oxide, zinc oxide, magnesium oxide, barium oxide, titanium oxide, antimony oxide and alkali metal oxide are mixed evenly according to the mass percentage to obtain mixed powder A; Silicon oxide, boron oxide, zinc oxide, magnesium oxide, barium oxide, titanium oxide, cerium oxide, antimony oxide and alkali metal oxide are mixed evenly according to the mass percentage to obtain mixed powder B. (2) Preparation of inorganic powder: Mixed powder A and mixed powder B are placed in a muffle furnace at 1200℃ and fired for 1 hour respectively. The mixture is melted evenly and clarified to form a uniform melt. After water quenching, inorganic slag is obtained. Then, it is wet-milled for 3 hours, dried and sieved to obtain inorganic powder A and inorganic powder B respectively. (3) Preparation of inorganic coating slurry: Add film-forming agent to inorganic powder A and mixed powder B respectively, stir evenly, and then coarsely grind and finely grind in sequence to obtain inorganic coating slurry A and inorganic coating slurry B respectively; (4) Preparation of inorganic composite coating: First, inorganic coating paste A is printed on the base glass by screen printing and dried to form inorganic coating A. Then, inorganic coating paste B is printed on inorganic coating A by screen printing and dried to form inorganic coating B, thus obtaining a semi-finished inorganic composite coating. Next, the semi-finished inorganic composite coating is tempered to obtain an inorganic composite coating.

8. The method for preparing a high-impact, high-transparency inorganic composite coating according to claim 7, characterized in that, The drying temperature is 150~220℃; the tempering temperature is 680~720℃ and the time is 100~400s.

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