Energy-saving light-weight glass bottle and preparation method thereof

Abstract

The invention relates to the technical field of glass bottle production, in particular to an energy-saving light-weight glass bottle and a preparation method thereof. The glass comprises cullet, nano-scale composite powder, lithium oxide-zinc oxide composite oxide, silicon dioxide and boron oxide, according to the energy-saving light-weight glass bottle and the preparation method thereof, cullet is adopted as one of main raw materials, so that waste glass resources are effectively utilized, the cost of the raw materials is reduced, and the ore extraction amount in the glass production process is reduced; the viscosity of a glass melt is reduced by utilizing lithium ions, so that the light weight of the glass bottle is realized, and the transportation cost and the energy consumption are effectively reduced; zinc ions fill network gaps to form a stable tetrahedral structure, a glass structural framework is strengthened, the compressive strength and impact resistance of the bottle body are improved while the weight is reduced, and therefore the comprehensive use performance and the market application value of the glass bottle are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of glass bottle production, and in particular to an energy-saving lightweight glass bottle and a preparation method thereof. Background Art

[0002] As the global packaging industry shifts toward greener, lower-carbon manufacturing, glass bottles, owing to their environmentally friendly, recyclable, and chemically stable properties, are widely used in food, beverage, and pharmaceutical sectors. However, traditional glass bottles have inherent drawbacks such as heavy weight and high raw material consumption, which not only increase transportation costs and energy consumption but also create inconvenience for consumers.

[0003] Current glass bottle lightweighting technology has some limitations. For example, simply thinning the bottle wall will reduce the structural strength and increase the transportation breakage rate. In the existing technology, some technologies improve the strength of the bottle body by adding high-strength additives, but the introduction of additives not only increases the cost of raw materials, but may also affect the chemical stability of the glass. When containing acidic or alkaline liquids, there is a risk of dissolution, which in turn affects the quality of the contents. There are also technologies that improve the strength by optimizing the bottle body structure (such as adding reinforcing ribs), but the structure is complicated, which not only reduces production efficiency, but may also lead to increased mold loss and increase production costs, thereby reducing the economy and market feasibility of lightweight technology in actual production.

[0004] In view of this, there is an urgent need for an energy-saving lightweight glass bottle and a preparation method thereof. Summary of the Invention

[0005] The object of the present invention is to provide an energy-saving lightweight glass bottle and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, firstly, the present invention provides an energy-saving lightweight glass bottle, comprising the following raw materials:

[0007] 60-70 parts of cullet, 5-8 parts of nano-scale composite powder, 10-15 parts of lithium oxide (Li2O)-zinc oxide (ZnO) composite oxide, 20-25 parts of silicon dioxide (SiO2) and 3-5 parts of boron oxide (B2O3), wherein the nano-scale composite powder comprises 2-3 parts of nano-scale titanium dioxide (TiO2) powder and 3-5 parts of nano-scale aluminum oxide (Al2O3) powder, and the lithium oxide (Li2O)-zinc oxide (ZnO) composite oxide comprises 3-5 parts of lithium oxide (Li2O) and 7-10 parts of zinc oxide (ZnO); wherein:

[0008] The lithium oxide (Li2O)-zinc oxide (ZnO) composite oxide is converted into a + ) reduces the viscosity of the glass melt to achieve lightweight molding, zinc ions (Zn2+ ) fills the network gap and strengthens the structure, which works together to reduce the weight of the bottle and maintain its strength; the nano-scale composite powder forms a lithium aluminum zincate transition layer with the lithium (Li)-oxygen (O)-zinc (Zn) bond on the glass surface through high-temperature sintering, which is used to improve the corrosion resistance and functionality of the bottle surface; the silicon dioxide (SiO2) is the main body of the glass network skeleton, which can cooperate with boron oxide (B2O3) to regulate the glass melting temperature and chemical stability, thereby increasing the safety of use.

[0009] Second, according to Figure 1 As shown, the present invention provides a method for preparing an energy-saving lightweight glass bottle, comprising the following steps:

[0010] S1. Raw material dispersion: crush the cullet to a particle size of ≤1.5 mm, add it into a high-speed blender with lithium oxide-zinc oxide composite oxide, silicon dioxide and boron oxide, and stir at a speed of 1000-1500 r / min for 20-30 minutes to evenly disperse the various raw materials to form a uniform raw material mixture;

[0011] S2. Melting: The raw material mixture is placed in a high-temperature furnace and melted at a temperature of 1250-1300℃ for 2.5-3 hours. At the same time, bubbles are blown into the glass liquid through the bubbling device in the furnace. The bubbles are discharged by the property of lithium oxide to make the glass liquid thinner, making the glass liquid clear. The zinc ions will combine with the silicon-oxygen structure in the glass to form [ZnO4] tetrahedrons, strengthening the glass structure skeleton, and finally obtaining a uniform, clear and structurally stable molten glass liquid;

[0012] S3. Molding: Using a high-precision metal mold with a tolerance of ≤0.05mm, the molten glass is injected into the mold. The air pressure is controlled at 0.8-1.2MPa to ensure that the wall thickness of the bottle is uniform and maintained at ±0.1mm. At the same time, the bottle structure is formed. The temperature of the glass liquid during molding is 1100-1150℃. The thermal stability of zinc oxide is utilized to prevent cracks in the lightweight bottle due to rapid cooling, forming a lightweight bottle prototype with uniform wall thickness, strengthened structure and no stress cracks.

[0013] S4, Annealing: Place the lightweight bottle prototype in an annealing furnace, heat it to 580-620℃ at a rate of 15-20℃ / min, and keep it at that temperature for 1.5-2 hours to eliminate internal stress; then cool it to 300℃ at a rate of 8-10℃ / min, and then cool it naturally to room temperature. The thermal stability of zinc oxide is further utilized to adjust the internal structure of the glass, so that the compressive stress of the bottle is evenly distributed, the impact resistance is enhanced, cracks caused by rapid cooling are avoided, and the stability of the bottle structure is ensured;

[0014] S5. Surface treatment: Nano-scale composite powders are evenly sprayed onto the surface of the bottle using a magnetron sputtering device to form a 20-30 nm thick composite film layer, which is then annealed in a muffle furnace at 550-600°C for 1-1.5 hours to allow the nano-powders to react with the lithium (Li)-oxygen (O)-zinc (Zn) bonds on the glass surface to form a 100-150 nm thick lithium aluminum zincate transition layer, which can improve the corrosion resistance and functionality of the bottle surface (such as the photocatalytic self-cleaning effect of nano-scale titanium dioxide);

[0015] S6. Flame strengthening: Use hydrogen-oxygen flame to perform secondary strengthening on the bottle surface. At a flame temperature of 800-900℃, the flame is evenly swept across the bottle surface at a speed of 10-15cm / s, causing the surface glass to melt slightly and promoting the migration of zinc ions to the surface, forming a 20-30μm thick compressive stress strengthening layer, thereby improving the surface hardness and wear resistance of the bottle and enhancing its impact resistance.

[0016] The invention first uses lithium oxide to reduce the viscosity of the glass melt, achieving lightweight molding. This not only allows the glass to flow evenly at lower temperatures, facilitating the formation of thin-walled bottles, but also zinc oxide fills the network gaps to form ZnO4 tetrahedrons, strengthening the glass structure. During the melting process, zinc ions bond with the silicon-oxygen network, effectively improving the bottle's compressive strength and impact resistance.

[0017] In addition, through the synergy of lithium oxide-zinc oxide composite oxide and nano-scale composite powder, not only lithium ions are used to reduce density to achieve weight reduction, but zinc ions are also used to strengthen the structure to maintain strength. At the same time, nano-scale titanium dioxide and aluminum oxide powders are bonded to the glass surface through high-temperature sintering to form a lithium aluminum zincate transition layer, thereby improving the corrosion resistance and functionality of the bottle surface; it is mainly because nano-scale titanium dioxide, aluminum oxide and the lithium-oxygen-zinc bonds on the glass surface react to form lithium aluminum zincate, which enhances the stability of the surface structure. The reaction formula is: Li2O·ZnO·SiO2+TiO2+Al2O3→LiAlZnO4·TiO2·SiO2.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In this energy-saving lightweight glass bottle and its preparation method, by using cullet as one of the main raw materials, not only waste glass resources are effectively utilized and raw material costs are reduced, but also the amount of ore mining in the glass production process is reduced. At the same time, the addition of lithium oxide-zinc oxide composite oxide utilizes lithium ions to reduce the viscosity of the glass melt, so that the glass liquid can flow evenly at a lower temperature, which is convenient for the formation of thin-walled bottles, realizes the lightweighting of the glass bottle, and effectively reduces transportation costs and energy consumption; and zinc ions fill the network gaps to form a stable tetrahedral structure, strengthening the glass structural skeleton, while lightweighting the bottle body. Improved compressive strength and impact resistance, it solves the problems of traditional glass bottles being heavy, high transportation costs, and inconvenient to handle, as well as the problems of simply thinning the bottle wall leading to decreased structural strength and increased breakage rate, thereby improving the comprehensive performance and market application value of the glass bottle.

[0020] 2. In this energy-saving lightweight glass bottle and its preparation method, lithium oxide-zinc oxide composite oxide and nano-scale composite powder work synergistically. While achieving the lightweight of the glass bottle, a lithium aluminum zincate transition layer is formed between the nano-scale composite powder and the glass surface, which greatly improves the corrosion resistance of the bottle surface. It can effectively resist the erosion of acidic or alkaline liquids, ensure the quality of the contents, and solve the problem in the existing technology that the introduction of additives affects the chemical stability of the glass and poses a risk of dissolution. At the same time, the photocatalytic properties of nano-scale titanium dioxide can decompose organic pollutants in the bottle, enhance the functionality of the product, and avoid the problems of reduced production efficiency and increased mold loss due to structural complexity, thereby improving the practicality of the lightweight glass bottle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a flowchart of the method for preparing the energy-saving lightweight glass bottle of the present invention. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] Example 1

[0024] 60 parts of cullet were crushed to a particle size of ≤1.5mm, and added to a high-speed stirrer with 10 parts of lithium oxide-zinc oxide composite oxide consisting of 3 parts of lithium oxide and 7 parts of zinc oxide, 20 parts of silicon dioxide, and 3 parts of boron oxide. The mixture was stirred at a speed of 1000r / min for 30 minutes to form a uniform raw material mixture; the mixture was put into a high-temperature furnace and melted at a temperature of 1250℃ for 3 hours. At the same time, bubbles were blown through a bubbling device to clarify the glass liquid; a high-precision metal mold with a tolerance of ≤0.05mm was used to inject the molten glass liquid at 1100℃ into the mold, and the uniformity of the bottle wall thickness was controlled to ±0.1mm by 0.8MPa air pressure to form a light Quantify the bottle prototype; place the prototype in an annealing furnace, heat it to 580°C at a rate of 15°C / min, keep it warm for 2 hours to eliminate internal stress, then cool it to 300°C at a rate of 8°C / min, and then cool it naturally to room temperature; use a magnetron sputtering device to evenly spray 5 parts of nano-scale composite powder consisting of 2 parts of nano-scale titanium dioxide powder and 3 parts of nano-scale aluminum oxide powder on the surface of the bottle to form a 20nm thick composite film layer, and then place it in a 550°C muffle furnace for annealing for 1.5 hours to form a lithium aluminum zincate transition layer; finally, use a hydrogen-oxygen flame at a flame temperature of 800°C and a speed of 10 cm / s to evenly sweep across the surface of the bottle for secondary strengthening.

[0025] Example 2

[0026] 65 parts of cullet were crushed to a particle size of ≤1.5 mm, and put into a high-speed mixer with 12 parts of lithium oxide-zinc oxide composite oxide consisting of 4 parts of lithium oxide and 8 parts of zinc oxide, 22 parts of silicon dioxide, and 4 parts of boron oxide. The mixture was stirred at a speed of 1200 r / min for 25 minutes to obtain a raw material mixture. The mixture was put into a high-temperature furnace and melted at 1270°C for 2.5 hours. At the same time, a bubbling device was used to assist in clarifying the glass liquid. The molten glass liquid at 1120°C was injected into a high-precision metal mold and the mixture was stirred at a pressure of 1.0 MPa. The wall thickness of the bottle body is made; the bottle prototype is placed in an annealing furnace, heated to 600°C at a rate of 18°C / min, kept warm for 1.5 hours, then cooled to 300°C at a rate of 9°C / min, and then cooled naturally; 6 parts of nano-scale composite powder consisting of 2.5 parts of nano-scale titanium dioxide powder and 3.5 parts of nano-scale aluminum oxide powder are sprayed on the surface of the bottle to form a 25nm thick composite film layer, annealed in a muffle furnace at 580°C for 1.2 hours, and finally secondary strengthened with a hydrogen-oxygen flame at 850°C at a speed of 12 cm / s.

[0027] Example 3

[0028] 70 parts of cullet were crushed to meet the particle size requirements, and then added to a high-speed mixer with 15 parts of lithium oxide-zinc oxide composite oxide consisting of 5 parts of lithium oxide and 10 parts of zinc oxide, 25 parts of silicon dioxide, and 5 parts of boron oxide. The mixture was stirred at a speed of 1500r / min for 20 minutes. The raw material mixture was melted in a high-temperature furnace at 1300℃ for 2.5 hours, and the glass liquid was clarified by a bubbling device. A high-precision mold was used to inject molten glass at 1150℃, and the mixture was stirred at 1.2MPa pressure. The wall thickness is made; the bottle prototype is heated to 620°C in an annealing furnace at a rate of 20°C / min, kept warm for 1.5 hours, then cooled to 300°C at a rate of 10°C / min, and cooled naturally; 8 parts of nano-scale composite powder consisting of 3 parts of nano-scale titanium dioxide powder and 5 parts of nano-scale alumina powder are evenly sprayed on the surface of the bottle to form a 30nm thick composite film layer, which is annealed in a muffle furnace at 600°C for 1 hour, and finally surface strengthened with a hydrogen-oxygen flame at 900°C at a speed of 15cm / s.

[0029] Example 4

[0030] 63 parts of crushed glass were weighed and crushed, and then added to a high-speed stirrer with 13 parts of lithium oxide-zinc oxide composite oxide (including 4 parts of lithium oxide and 9 parts of zinc oxide), 23 parts of silicon dioxide, and 4 parts of boron oxide, and stirred at a speed of 1300r / min for 22 minutes; the mixture was placed in a high-temperature furnace and melted at a temperature of 1260℃ for 2.8 hours, and the glass liquid was clarified by a bubbling device; the molten glass liquid at 1130℃ was injected into a high-precision mold, and the uniformity of the bottle wall thickness was controlled by 1.1MPa air pressure; the bottle The prototype was heated to 590°C at a rate of 16°C / min in an annealing furnace, kept warm for 1.8 hours, cooled to 300°C at a rate of 9°C / min, and naturally cooled to room temperature; 6 parts of nano-scale composite powder consisting of 2.2 parts of nano-scale titanium dioxide powder and 3.8 parts of nano-scale alumina powder were sprayed on the surface of the bottle to form a 23nm thick composite film layer, which was annealed in a muffle furnace at 560°C for 1.3 hours, and finally subjected to secondary strengthening treatment using a hydrogen-oxygen flame at a speed of 11cm / s at 830°C.

[0031] Table 1 Amounts of raw materials used in Examples 1-4

[0032]

[0033] In order to verify that the glass bottle prepared in the embodiment of the present invention has good lightweight effect and comprehensive performance, the glass bottle provided in the embodiment of the present invention is described through the following test examples.

[0034] Test example

[0035] The purpose of this test group is to explore the effects of different component ratios on glass bottles and to test the lightweight, compressive strength, impact resistance and surface corrosion resistance of the glass bottles of the present invention.

[0036] Experimental objectives: Experimental groups A, B, C, and D respectively adopt the composition ratios of the energy-saving lightweight glass bottles provided in Examples 1-4; the control examples adopt control groups A, B, C, D, E, and F, wherein:

[0037] Control group A

[0038] Mix 75 parts of quartz sand, 15 parts of sodium carbonate, 8 parts of calcium carbonate, and 2 parts of magnesium oxide, put them into a high-temperature furnace at 1500℃ and melt them for 4 hours. After clarification, they are injected into an ordinary metal mold and formed into a bottle body at 1000℃. After natural cooling, no surface treatment is performed.

[0039] Control group B

[0040] The soda-lime glass formula (70 parts of quartz sand, 18 parts of sodium carbonate, 10 parts of calcium carbonate, and 2 parts of magnesium oxide) is used. After melting at 1500°C, the bottle wall thickness is reduced to 1.6mm (traditional 2.0mm) through a mold without adding any strengthening ingredients.

[0041] Control group C

[0042] The raw material composition is 65 parts of cullet, 20 parts of quartz sand, 10 parts of sodium carbonate, 5 parts of boric acid, and 3 parts of zirconium oxide (a high-strength additive); it is melted at 1450°C for 3 hours, and the bottle wall thickness during molding is 1.6 mm. The surface is untreated after annealing.

[0043] Control group D

[0044] The raw materials are 65 parts of cullet, 5 parts of lithium oxide, 23 parts of silicon dioxide, and 4 parts of boron oxide. No zinc oxide or nano-composite powder is added. After melting at 1280°C for 2.5 hours, the bottle is formed into a bottle with a wall thickness of 1.5 mm and only flame strengthening treatment is performed.

[0045] Control group E

[0046] The same raw material formula as in Example 2 (65 parts of cullet, 4 parts of lithium oxide, 8 parts of zinc oxide, and 6 parts of nanocomposite powder) was used, but the S5 surface treatment step was omitted, and only flame strengthening was performed.

[0047] Control group F

[0048] The same raw materials as in Example 3 were used. After melt molding, the temperature was directly raised to 600°C at a rate of 30°C / min, kept at that temperature for 1 hour, and then rapidly cooled to room temperature. The heating and cooling rates were not controlled.

[0049] Test method: According to the lightweight degree, compressive strength, impact resistance and surface corrosion resistance of the present invention, tests are carried out respectively. The specific test methods are as follows:

[0050] Lightweight degree: The density of the glass bottle was determined by the water displacement method and the weight loss rate was calculated. Specifically, the glass bottle was dried at 105°C for 2 hours to constant weight, and then the mass (m) was weighed with an electronic balance with an accuracy of 0.01g. The volume (V) was measured by the water displacement method with a graduated cylinder. The density was calculated according to density (ρ) = m / V. The density of traditional soda-lime glass was 2.5g / cm 3 For reference, the weight reduction rate was calculated as follows: weight reduction rate (%) = [(conventional glass density - test glass density) / conventional glass density] × 100%;

[0051] Compressive strength: Axial compression test was conducted using a universal material testing machine. The glass bottle was placed vertically between the upper and lower pressure plates. Axial pressure was applied uniformly at a rate of 5 mm / min. The maximum load (F) when the bottle broke was recorded. The formula σ = F / S (where S is the cross-sectional area of ​​the bottom of the bottle, in mm) was used to determine the compressive strength. 2 ) Calculate the compressive strength in MPa;

[0052] Impact resistance: The free fall impact test is used to measure the performance. During the test, a glass bottle is filled with 20℃ water to full capacity and is dropped from a height of 1.2m to a cement floor with a roughness of Ra=6.3μm. This is repeated 10 times and the number of fractures is recorded. The impact strength (J / m) is used as the evaluation index and the calculation formula is mass (kg) × acceleration due to gravity (9.8m / s 2 ) × drop height (m) divided by the number of ruptures, and the number of ruptures ≤ 3 times is considered qualified;

[0053] Surface corrosion resistance: The surface corrosion rate was determined by the acid-base immersion method. The test conditions were as follows: the glass bottles were placed in 5% citric acid solution (pH = 2.5) and 5% sodium carbonate solution (pH = 11.5), respectively, and immersed at 60°C for 24 hours. The bottles were rinsed with deionized water and dried before and after immersion. The surface roughness (Ra) was measured with the help of a surface profilometer with an accuracy of 0.1 μm. The corrosion rate was calculated using the formula: corrosion rate (μm / h) = |Ra2-Ra1| / immersion time (h), where Ra1 is the surface roughness before immersion and Ra2 is the surface roughness after immersion.

[0054] Specific detection indicators are shown in Table 2.

[0055] Table 2 Test indicators of each sample

[0056]

[0057] According to Table 2, the comparison data are summarized as follows:

[0058] The lightweight effect is significantly improved: the density of AD in the test group is between 2.12-2.18g / cm 3The weight reduction rate was between 12.8% and 15.2%, which was better than 0% for control group A (traditional glass) and 0.8% for control group B (simple thinning of the bottle wall). This shows that lithium oxide-zinc oxide composite oxide achieved lightweighting by reducing the density of glass, while control group D (no zinc oxide added) achieved a 10% weight reduction, but its density was still higher than that of the experimental group, indicating that the synergistic effect of zinc oxide is more important for the weight reduction effect.

[0059] The compressive and impact resistance properties are comprehensively enhanced: the compressive strength of the test group reached 82.5-92.1MPa, and the impact strength was 32.6-36.5J / m, both better than the control group A (65.2MPa, 25.4J / m) and the control group B (58.6MPa, 22.3J / m); among them, the compressive strength of the test group C (with the best ratio of lithium oxide to zinc oxide) was increased by 41.2% compared with the control group A, and the impact strength was increased by 43.7%, and it did not break after 10 drop tests, verifying that the tetrahedral structure formed by zinc oxide filling the network gap can effectively strengthen the bottle skeleton, solving the problem of strength loss caused by simple thinning.

[0060] A breakthrough was achieved in surface corrosion resistance: the corrosion rate of the test group in 5% citric acid and sodium carbonate solution was only 0.08-0.18μm / h, which was more than 50% lower than that of the control group A (0.35-0.42μm / h); although the corrosion resistance of the control group E (nanopowder surface treatment omitted) was better than that of traditional glass, the corrosion rate was still 30% higher than that of the test group B, indicating that the lithium aluminum zincate transition layer formed by the nano-scale composite powder and the glass surface can resist acid and alkali corrosion, solving the dissolution risk problem introduced by the additives in the existing technology.

[0061] Process synergy improves overall performance: The experimental group used high-precision molds to control wall thickness uniformity (±0.1mm) and combined it with an annealing process to optimize compressive stress distribution. Its impact resistance was improved by 28%-29% compared to the control group F (which did not control the heating and cooling rates). The flame strengthening step formed a compressive stress layer on the surface of the experimental group, and the compressive strength increased by 10.5%-22.1% compared to the control group D that did not undergo this treatment, proving that the synergistic effect of each process step is indispensable for enhancing bottle performance.

[0062] In summary, the present invention uses the synergistic effect of lithium oxide-zinc oxide composite oxide and nano-scale composite powder, combined with high-precision molding and surface strengthening technology, to prepare energy-saving and lightweight glass bottles with a density as low as 2.12-2.18g / cm 3 The weight reduction rate reaches 12.8%-15.2%, the compressive strength is increased to 82.5-92.1MPa, and the impact strength reaches 32.6-36.5J / m. It can be seen that it not only improves the lightweight degree and structural strength of the glass bottle, but also improves the surface corrosion resistance and functionality, thereby effectively solving the problems of traditional glass bottles with heavy weight, low strength and poor corrosion resistance.

[0063] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing an energy-saving lightweight glass bottle, characterized in that: The following steps are involved: S1. After crushing the cullet, add it into a high-speed mixer with lithium oxide-zinc oxide composite oxide, silicon dioxide and boron oxide to form a raw material mixture by stirring so that the raw materials are evenly dispersed; S2. The raw material mixture is put into a high-temperature furnace for melting. At the same time, bubbles are blown into the glass liquid through a bubbling device in the furnace. The lithium oxide thins the glass liquid, which in turn expels the bubbles and clarifies the glass liquid. The zinc ions combine with the silicon-oxygen structure in the glass to form ZnO4 tetrahedrons, strengthening the glass structure skeleton. Ultimately, a uniform, clear, and structurally stable molten glass liquid is obtained. S3. Use a high-precision metal mold to inject molten glass to make the bottle wall thickness uniform and complete the molding of the bottle body structure, forming a lightweight bottle prototype with uniform wall thickness, strengthened structure and no stress cracks; S4. Place the lightweight bottle prototype in an annealing furnace, eliminate internal stress through temperature control, then cool it down naturally to room temperature. Utilize the thermal stability of zinc oxide to adjust the internal structure of the glass so that the compressive stress of the bottle is evenly distributed. S5. Spraying the nano-scale composite powder evenly on the surface of the bottle using a magnetron sputtering device to form a composite film layer, and then annealing the composite film layer in a muffle furnace to allow the nano-powder to react with the lithium-oxygen-zinc bonds on the glass surface to form a lithium aluminum zincate transition layer; S6. Use hydrogen-oxygen flame to strengthen the bottle surface, so that the surface glass is slightly melted and zinc ions are promoted to migrate to the surface, forming a compressive stress strengthening layer.

2. The method for preparing an energy-saving lightweight glass bottle according to claim 1, characterized in that: In the above-mentioned S1, the cullet is crushed into particles with a diameter of ≤1.5 mm; and stirred in a high-speed stirrer at a speed of 1000-1500 r / min for 20-30 min.

3. The method for preparing an energy-saving lightweight glass bottle according to claim 1, characterized in that: In S2, the high temperature furnace is used for melting at a temperature of 1250-1300° C. for 2.5-3 hours.

4. The method for preparing an energy-saving lightweight glass bottle according to claim 1, characterized in that: In the above-mentioned S3, the tolerance of the high-precision metal mold is ≤0.05mm, and the air pressure of the high-precision metal mold is 0.8-1.2MPa, so that the wall thickness of the bottle body is maintained at ±0.1mm.

5. The method for preparing an energy-saving lightweight glass bottle according to claim 1, characterized in that: In the above-mentioned S3, when the high-precision metal mold is forming the molten glass liquid, the temperature of the molten glass liquid is 1100-1150°C.

6. The method for preparing an energy-saving lightweight glass bottle according to claim 1, characterized in that: In the above S4, the annealing furnace is heated to 580-620°C at a rate of 15-20°C / min, kept at this temperature for 1.5-2h to eliminate internal stress, and then cooled to 300°C at a rate of 8-10°C / min.

7. The method for preparing an energy-saving lightweight glass bottle according to claim 1, characterized in that: In the above-mentioned S5, the nano-scale composite powder includes 2-3 parts of nano-scale titanium dioxide powder and 3-5 parts of nano-scale aluminum oxide powder.

8. The method for preparing an energy-saving lightweight glass bottle according to claim 1, characterized in that: In the above S5, the thickness of the composite film layer is 20-30 nm, and the film is annealed in a muffle furnace at a temperature of 550-600° C. for 1-1.5 h. The thickness of the lithium aluminum zincate transition layer is 100-150 nm.

9. The method for preparing an energy-saving lightweight glass bottle according to claim 1, characterized in that: In the above S6, the oxyhydrogen flame is evenly swept across the bottle surface at a speed of 10-15 cm / s at a flame temperature of 800-900° C., and the thickness of the compressive stress strengthening layer is 20-30 μm.

10. An energy-saving lightweight glass bottle prepared by the method for preparing an energy-saving lightweight glass bottle according to any one of claims 1 to 9, characterized in that: Including the following ingredients: 60-70 parts of cullet, 5-8 parts of nano-scale composite powder, 10-15 parts of lithium oxide-zinc oxide composite oxide, 20-25 parts of silicon dioxide and 3-5 parts of boron oxide, wherein the lithium oxide-zinc oxide composite oxide comprises 3-5 parts of lithium oxide and 7-10 parts of zinc oxide; wherein: The lithium oxide-zinc oxide composite oxide reduces the viscosity of the glass melt through lithium ions, and zinc ions fill the network gaps to strengthen the structure, which work together to reduce the weight of the bottle and maintain its strength; the nano-scale composite powder forms a lithium aluminum zincate transition layer with the lithium-oxygen-zinc bond on the glass surface through high-temperature sintering.

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