High-strength high-temperature-resistant fireproof industrial glass and preparation method thereof

Abstract

The invention discloses high-strength high-temperature-resistant fireproof industrial glass and a preparation method thereof, and relates to the technical field of glass manufacturing. The industrial glass is prepared from the following raw materials: silicon dioxide, boric oxide, aluminum oxide, sodium oxide, potassium oxide, niobium phosphate, a composite reinforcing component and a clarifying agent, the composite reinforcing component is prepared from hafnium oxide, gadolinium oxide and zinc oxide; the clarifying agent is obtained by mixing cerium dioxide and tin oxide. The preparation method of the industrial glass comprises the following steps: preparing functional components, melting glass, forming a glass substrate, and preparing the industrial glass. The prepared industrial glass is high in strength, good in high-temperature stability and excellent in fireproof performance.

Description

Technical Field

[0001] This invention relates to the field of glass manufacturing technology, specifically to a high-strength, high-temperature resistant, fire-resistant industrial glass and its preparation method. Background Technology

[0002] Industrial glass is widely used in fields such as industrial production, building curtain walls, rail transportation, and special kilns because it has functions such as light transmission and observation, and isolation and protection. However, its requirements for mechanical strength, high temperature stability and fire resistance are becoming increasingly stringent.

[0003] Currently, conventional industrial glass, such as soda-lime silicate glass, while low in cost and with good light transmittance, suffers from weak mechanical strength and poor impact resistance. It is prone to breakage under external impact or vibration, failing to meet the requirements for protection of industrial equipment and use in heavy-duty environments. Existing high-temperature resistant glass, primarily based on quartz glass, can withstand high temperatures, but its manufacturing cost is high, it is brittle, difficult to process, and has poor fire resistance. In fire scenarios, it is prone to shattering due to sudden temperature increases, failing to effectively prevent the spread of flames and high-temperature smoke. Prior art, disclosed in CN110590171B, describes a high-strength high-temperature resistant glass for laboratory use and its preparation method. This prior art focuses primarily on improving the mechanical strength and high-temperature resistance of the glass for laboratory applications, without addressing fire resistance, thus failing to meet the needs of industrial applications. The prior art disclosed in CN110627383A is a method for preparing transparent fireproof gel and composite fireproof glass. This prior art takes "building fire protection" as its core objective and focuses on fire resistance and transparency. However, it has significant shortcomings in mechanical strength and high-temperature stability and cannot meet the comprehensive performance requirements of industrial glass.

[0004] In summary, although the existing technical solutions have improved certain properties of industrial glass to some extent, the following technical problems still exist: low strength, poor high-temperature stability, and insufficient fire resistance. Summary of the Invention

[0005] In order to solve the above-mentioned problems in the prior art, the present invention provides a high-strength, high-temperature resistant, fireproof industrial glass and its preparation method, and achieves the following objectives: to prepare industrial glass with high strength, good high-temperature stability, and excellent fire resistance.

[0006] To achieve the above objectives, the following technical solution is adopted: A high-strength, high-temperature resistant, fireproof industrial glass, by weight, comprises the following raw materials: 70-85 parts silicon dioxide, 5-15 parts boron oxide, 5-10 parts aluminum oxide, 2-5 parts sodium oxide, 1-3 parts potassium oxide, 4-8 parts niobium phosphate, 1-2 parts composite reinforcing component, and 1.5-2.5 parts clarifying agent.

[0007] This invention also provides a method for preparing high-strength, high-temperature resistant, fire-resistant industrial glass, including the steps of preparing functional components, glass melting, glass substrate forming, and obtaining industrial glass. Preparation of the functional components: Hafnium oxide, gadolinium oxide, and zinc oxide are added to a ball mill, anhydrous ethanol is added, and the mixture is ball-milled; then, after drying and grinding, a composite reinforcing component is obtained; cerium dioxide and tin oxide are mixed evenly to obtain a clarifying agent.

[0008] Furthermore, the mass ratio of hafnium oxide, gadolinium oxide, and zinc oxide is (1-2):(2-6):(1-3); the amount of anhydrous ethanol used is 1.5 times the total mass of hafnium oxide, gadolinium oxide, and zinc oxide; and the mass ratio of cerium dioxide and tin oxide is (5-6):(3-4).

[0009] Further, dried hafnium oxide, gadolinium oxide, and zinc oxide are added to a planetary ball mill along with anhydrous ethanol. The mixture is then ball-milled at a ball-to-material ratio (mass ratio) of 5:1 for 2-3 hours at a speed of 300-400 rpm. After ball milling, the mixture is dried at 80-100℃ until constant weight is achieved, and then ground until all components pass through a 300-400 mesh sieve to obtain the composite reinforcing component. Dried cerium dioxide and tin oxide are then mixed uniformly to obtain a clarifying agent.

[0010] The glass melting process involves uniformly mixing silica, boron oxide, aluminum oxide, sodium oxide, potassium oxide, niobium phosphate, composite reinforcing components, and clarifying agents, followed by melting using a gradient heating method; then cooling and holding at that temperature to obtain a glass melt.

[0011] Furthermore, the gradient heating method is as follows: First, the temperature is raised from room temperature to 600-700℃ at a heating rate of 5-8℃ / min, and held for 1-1.5 hours; then the temperature is raised to 1200-1300℃ at a heating rate of 8-10℃ / min, and held for 1.5-2 hours; finally, the temperature is raised to 1550-1650℃ at a heating rate of 5-8℃ / min, and held for 2-3 hours.

[0012] Furthermore, silica, boron oxide, aluminum oxide, sodium oxide, potassium oxide, niobium phosphate, composite reinforcing components, and clarifying agents are mixed evenly and added to an electrically heated glass melting furnace. The mixture is then melted using a gradient heating method. After melting, the temperature is lowered to 1500-1550℃ and held for 1-1.5 hours to obtain the glass melt.

[0013] The glass substrate forming process involves pouring molten glass into a preheated graphite mold and then placing it together in a heat-preserving furnace for heat preservation; then cooling and heat preservation until the temperature drops to room temperature to obtain the glass substrate.

[0014] Further, the graphite mold is preheated to 800-1000℃, the molten glass is poured into the mold, and the mold and the molten glass are placed together in a holding furnace preheated to 1000-1100℃ and held for 30-60 minutes. After holding, the temperature is lowered to 500-550℃ at a rate of 5-10℃ / h and held for 2-3 hours. Then, the temperature is lowered to room temperature at a rate of 20-30℃ / h to obtain the glass substrate.

[0015] The industrial glass is prepared by: mixing potassium nitrate, lithium nitrate, and cesium nitrate evenly, heating and stirring to obtain ion exchange molten salt; immersing the glass substrate in the ion exchange molten salt and maintaining the temperature for reaction; after the reaction is completed, cooling to room temperature, washing, and drying to obtain industrial glass.

[0016] Furthermore, the mass ratio of potassium nitrate, lithium nitrate, and cesium nitrate is (12-16):(1-2):(1-2).

[0017] Furthermore, the washing process involves rinsing the glass surface 3-4 times with deionized water, followed by rinsing 1-2 times with anhydrous ethanol. The drying process involves a temperature of 120-130℃ and a drying time of 1-1.5 hours.

[0018] Further, potassium nitrate, lithium nitrate, and cesium nitrate are mixed evenly and heated to 450-500℃ at a rate of 5-10℃ / min. The mixture is then stirred at 450-500℃ for 15-20 minutes at a speed of 100-200 rpm to obtain an ion-exchange molten salt. The glass substrate is then immersed in the ion-exchange molten salt at a controlled temperature of 400-450℃ for 4-6 hours. After the reaction is completed, the substrate is cooled to room temperature, washed, and dried to obtain industrial glass.

[0019] The beneficial effects of this invention are as follows: (1) The high-strength, high-temperature resistant, fireproof industrial glass of the present invention has high mechanical strength. The prepared industrial glass has a hardness of 720-728 Hv, a bending strength of 651-677 MPa, and a minimum fracture height of 75-80 cm.

[0020] (2) The high-strength, high-temperature resistant, fireproof industrial glass of the present invention has excellent high-temperature stability. In the alternating hot and cold immersion cycle test, the prepared industrial glass did not crack after 41-48 hot and cold cycles.

[0021] (3) The high-strength, high-temperature resistant, fire-resistant industrial glass of the present invention has excellent fire resistance. The fire resistance limit of the prepared industrial glass is 107-124 min. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0023] Example 1: A high-strength, high-temperature resistant, fireproof industrial glass and its preparation method A high-strength, high-temperature resistant, fireproof industrial glass, by weight, comprises the following raw materials: 70 parts silicon dioxide, 15 parts boron oxide, 5 parts aluminum oxide, 5 parts sodium oxide, 1 part potassium oxide, 4 parts niobium phosphate, 1 part composite reinforcing component, and 1.5 parts clarifying agent.

[0024] A method for preparing high-strength, high-temperature resistant, fire-resistant industrial glass includes the following steps: Step 1: Preparation of functional components Dry hafnium oxide, gadolinium oxide, and zinc oxide were added to a planetary ball mill at a mass ratio of 1:2:1. Anhydrous ethanol was added at a ratio of 1.5 times the total mass of hafnium oxide, gadolinium oxide, and zinc oxide. The mixture was then ball-milled at a ball-to-material ratio of 5:1 for 2 hours at a speed of 400 rpm. After ball milling, the mixture was dried at 80°C until constant weight was achieved. Finally, it was ground until all the components passed through a 300-400 mesh sieve to obtain the composite reinforcing component.

[0025] Dry cerium dioxide and tin oxide are mixed evenly to obtain a clarifying agent, with a mass ratio of cerium dioxide to tin oxide of 5:3.

[0026] Step 2: Glass Melting Silica, boron oxide, aluminum oxide, sodium oxide, potassium oxide, niobium phosphate, composite reinforcing components, and clarifying agents were mixed evenly and added to an electrically heated glass melting furnace. Melting was carried out using a gradient heating method: first, the temperature was raised from room temperature to 600℃ at a rate of 5℃ / min and held for 1.5 hours; then, the temperature was raised to 1200℃ at a rate of 8℃ / min and held for 2 hours; finally, the temperature was raised to 1550℃ at a rate of 5℃ / min and held for 3 hours. After melting, the temperature was lowered to 1500℃ and held for 1.5 hours to obtain the glass melt.

[0027] Step 3: Glass substrate molding The graphite mold is preheated to 800℃, and the glass melt is poured into the graphite mold. The mold and the melt are placed together in a holding furnace preheated to 1000℃ and held for 60 minutes. After the holding period, the temperature is lowered to 500℃ at a rate of 5℃ / h and held for 3 hours. Then the temperature is lowered to room temperature at a rate of 20℃ / h to obtain the glass substrate.

[0028] Step 4: Obtaining industrial glass Potassium nitrate, lithium nitrate, and cesium nitrate were mixed evenly in a mass ratio of 12:1:1. The mixture was heated to 450°C at a rate of 5°C / min. The mixture was then held at 450°C and stirred for 20 min at a speed of 100 rpm to obtain an ion-exchange molten salt. The glass substrate is immersed in ion-exchange molten salt at a controlled temperature of 400℃ for 6 hours. After the reaction is completed, it is cooled to room temperature, washed, and dried to obtain industrial glass.

[0029] The washing process involves rinsing the glass surface three times with deionized water, followed by rinsing once with anhydrous ethanol. The drying process is carried out at 120°C for 1.5 hours.

[0030] Example 2: A high-strength, high-temperature resistant, fireproof industrial glass and its preparation method A high-strength, high-temperature resistant, fireproof industrial glass, by weight, comprises the following raw materials: 80 parts silicon dioxide, 10 parts boron oxide, 8 parts aluminum oxide, 4 parts sodium oxide, 2 parts potassium oxide, 6 parts niobium phosphate, 1.5 parts composite reinforcing component, and 2 parts clarifying agent.

[0031] A method for preparing high-strength, high-temperature resistant, fire-resistant industrial glass includes the following steps: Step 1: Preparation of functional components Dry hafnium oxide, gadolinium oxide, and zinc oxide were added to a planetary ball mill in a mass ratio of 1.5:4:2. Anhydrous ethanol was added, with the amount of anhydrous ethanol being 1.5 times the total mass of hafnium oxide, gadolinium oxide, and zinc oxide. The mixture was ball-milled at a ball-to-material ratio (mass ratio) of 5:1 for 2.5 hours at a speed of 400 rpm. After ball milling, the mixture was dried at 90°C until constant weight was achieved. Then, it was ground until all of the mixture passed through a 300-400 mesh sieve to obtain the composite reinforcing component.

[0032] Dry cerium dioxide and tin oxide are mixed evenly to obtain a clarifying agent, with a mass ratio of cerium dioxide to tin oxide of 5:4.

[0033] Step 2: Glass Melting Silica, boron oxide, aluminum oxide, sodium oxide, potassium oxide, niobium phosphate, composite reinforcing components, and clarifying agents were mixed evenly and added to an electrically heated glass melting furnace. Melting was carried out using a gradient heating method: first, the temperature was raised from room temperature to 650°C at a rate of 7°C / min and held for 1.5 hours; then, it was raised to 1250°C at a rate of 9°C / min and held for 2 hours; finally, it was raised to 1600°C at a rate of 6°C / min and held for 2.5 hours. After melting, the temperature was lowered to 1550°C and held for 1.5 hours to obtain the glass melt.

[0034] Step 3: Glass substrate molding The graphite mold is preheated to 900℃, and the molten glass is poured into the graphite mold. The mold and the molten glass are then placed together in a holding furnace preheated to 1100℃ and held for 60 minutes. After holding, the temperature is lowered to 500℃ at a rate of 10℃ / h and held for 2.5 hours. Then, the temperature is lowered to room temperature at a rate of 25℃ / h to obtain the glass substrate.

[0035] Step 4: Obtaining industrial glass Potassium nitrate, lithium nitrate, and cesium nitrate were mixed evenly in a mass ratio of 14:1.5:1.5. The mixture was heated to 500°C at a rate of 10°C / min. The mixture was then held at 500°C and stirred for 20 min at a speed of 200 rpm to obtain an ion-exchange molten salt. The glass substrate is immersed in ion-exchange molten salt at a controlled temperature of 450°C for 5 hours. After the reaction is completed, it is cooled to room temperature, washed, and dried to obtain industrial glass.

[0036] The washing process involves rinsing the glass surface four times with deionized water, followed by rinsing twice with anhydrous ethanol. The drying process is carried out at 125°C for 1.5 hours.

[0037] Example 3: A high-strength, high-temperature resistant, fireproof industrial glass and its preparation method A high-strength, high-temperature resistant, fireproof industrial glass, by weight, comprises the following raw materials: 85 parts silicon dioxide, 5 parts boron oxide, 10 parts aluminum oxide, 2 parts sodium oxide, 3 parts potassium oxide, 8 parts niobium phosphate, 2 parts composite reinforcing component, and 2.5 parts clarifying agent.

[0038] A method for preparing high-strength, high-temperature resistant, fire-resistant industrial glass includes the following steps: Step 1: Preparation of functional components Dry hafnium oxide, gadolinium oxide, and zinc oxide were added to a planetary ball mill in a mass ratio of 2:6:3. Anhydrous ethanol was added, with the amount of anhydrous ethanol being 1.5 times the total mass of hafnium oxide, gadolinium oxide, and zinc oxide. The mixture was ball-milled at a ball-to-material ratio (mass ratio) of 5:1 for 3 hours at a speed of 300 rpm. After ball milling, the mixture was dried at 100℃ until constant weight was achieved. Then, it was ground until all of the mixture passed through a 300-400 mesh sieve to obtain the composite reinforcing component.

[0039] Dry cerium dioxide and tin oxide are mixed evenly to obtain a clarifying agent, with a mass ratio of cerium dioxide to tin oxide of 6:4.

[0040] Step 2: Glass Melting Silica, boron oxide, aluminum oxide, sodium oxide, potassium oxide, niobium phosphate, composite reinforcing components, and clarifying agents were mixed evenly and added to an electrically heated glass melting furnace. Melting was carried out using a gradient heating method: first, the temperature was raised from room temperature to 700℃ at a rate of 8℃ / min and held for 1 hour; then, it was raised to 1300℃ at a rate of 10℃ / min and held for 1.5 hours; finally, it was raised to 1650℃ at a rate of 8℃ / min and held for 2 hours. After melting, the temperature was lowered to 1550℃ and held for 1 hour to obtain the glass melt.

[0041] Step 3: Glass substrate molding The graphite mold is preheated to 1000℃, and the glass melt is poured into the graphite mold. The mold and the melt are placed together in a holding furnace preheated to 1100℃ and held for 30 minutes. After the holding period, the temperature is lowered to 550℃ at a rate of 10℃ / h and held for 2 hours. Then the temperature is lowered to room temperature at a rate of 30℃ / h to obtain the glass substrate.

[0042] Step 4: Obtaining industrial glass Potassium nitrate, lithium nitrate, and cesium nitrate were mixed evenly in a mass ratio of 16:2:2. The mixture was heated to 500°C at a rate of 10°C / min. The mixture was then held at 500°C and stirred for 15 min at a speed of 200 rpm to obtain an ion-exchange molten salt. The glass substrate is immersed in ion-exchange molten salt at a controlled temperature of 450°C for 4 hours. After the reaction is completed, it is cooled to room temperature, washed, and dried to obtain industrial glass.

[0043] The washing process involves rinsing the glass surface four times with deionized water, followed by rinsing twice with anhydrous ethanol. The drying process is carried out at 130°C for 1 hour.

[0044] Comparative Example 1 An industrial glass, by weight, comprises the following raw materials: 80 parts silicon dioxide, 10 parts boron oxide, 8 parts aluminum oxide, 4 parts sodium oxide, 2 parts potassium oxide, 6 parts niobium phosphate, and 2 parts clarifying agent.

[0045] A method for preparing industrial glass includes the following steps: Step 1: Preparation of functional components Dry cerium dioxide and tin oxide are mixed evenly to obtain a clarifying agent, with a mass ratio of cerium dioxide to tin oxide of 5:4.

[0046] Step 2: Glass Melting Silica, boron oxide, aluminum oxide, sodium oxide, potassium oxide, niobium phosphate, and a clarifying agent were mixed evenly and added to an electrically heated glass melting furnace. Melting was carried out using a gradient heating method: first, the temperature was raised from room temperature to 650°C at a rate of 7°C / min and held for 1.5 hours; then, it was raised to 1250°C at a rate of 9°C / min and held for 2 hours; finally, it was raised to 1600°C at a rate of 6°C / min and held for 2.5 hours. After melting, the temperature was lowered to 1550°C and held for 1.5 hours to obtain the glass melt.

[0047] Step 3: Glass substrate molding This step is the same as the "glass substrate forming" step in Example 2.

[0048] Step 4: Obtaining industrial glass This step is the same as the "Preparation of Industrial Glass" step in Example 2.

[0049] Comparative Example 2 An industrial glass, by weight, comprises the following raw materials: 80 parts silicon dioxide, 10 parts boron oxide, 8 parts aluminum oxide, 4 parts sodium oxide, 2 parts potassium oxide, 1.5 parts composite reinforcing component, and 2 parts clarifying agent.

[0050] A method for preparing industrial glass includes the following steps: Step 1: Preparation of functional components This step is the same as the "Preparation of Functional Components" step in Example 2.

[0051] Step 2: Glass Melting Silica, boron oxide, aluminum oxide, sodium oxide, potassium oxide, composite reinforcing components, and clarifying agents were mixed evenly and added to an electrically heated glass melting furnace. Melting was carried out using a gradient heating method: first, the temperature was raised from room temperature to 650°C at a rate of 7°C / min and held for 1.5 hours; then, the temperature was raised to 1250°C at a rate of 9°C / min and held for 2 hours; finally, the temperature was raised to 1600°C at a rate of 6°C / min and held for 2.5 hours. After melting, the temperature was lowered to 1550°C and held for 1.5 hours to obtain the glass melt.

[0052] Step 3: Glass substrate molding This step is the same as the "glass substrate forming" step in Example 2.

[0053] Step 4: Obtaining industrial glass This step is the same as the "Preparation of Industrial Glass" step in Example 2.

[0054] Example 4 Performance Test (I) Hardness tests were conducted on the industrial glasses prepared in Examples 1-3 and Comparative Examples 1-2, according to the test methods specified in GB / T 37900-2019. The glass samples were square specimens with a side length of 40 mm and a thickness of 1 mm. Bending strength tests were conducted on the prepared industrial glasses, with samples prepared as specimens 100 mm long, 15 mm wide, and 1 mm thick, using a universal testing machine with a span of 50 mm. Impact resistance tests were conducted on the prepared industrial glasses, with glass specimens 0.55 mm thick. A 64 g steel ball was dropped from 30 cm, with the height increased by 5 cm at each drop, and three specimens were tested at each height. The lowest breakage height was recorded. Specific test results are shown in Table 1.

[0055] Table 1 As shown in Table 1, the industrial glass prepared in Examples 1-3 has a hardness of 720-728 Hv, a bending strength of 651-677 MPa, and a minimum fracture height of 75-80 cm, all of which are significantly improved compared to the comparative examples, proving that the industrial glass prepared by the present invention has high mechanical strength.

[0056] (ii) High-temperature stability tests were conducted on the industrial glasses prepared in Examples 1-3 and Comparative Examples 1-2. The glass samples were heated to 600°C, held at that temperature for 30 minutes, and then rapidly immersed in 25°C water for cooling. This cycle was repeated until cracks appeared in the samples, and the maximum number of cycles without cracks was recorded. The specific test results are shown in Table 2.

[0057] Table 2 As shown in Table 2, the industrial glass prepared in Examples 1-3 did not crack after 41-48 cycles of alternating hot and cold immersion, proving that the industrial glass prepared by the present invention has excellent high-temperature stability.

[0058] (III) The fire resistance performance of the industrial glass prepared in Examples 1-3 and Comparative Examples 1-2 was tested. The fire resistance limit test was carried out according to the test method specified in GB / T15763.1-2009, and the time when the glass lost its integrity or heat insulation was recorded. The specific test results are shown in Table 3.

[0059] Table 3 As shown in Table 3, the fire resistance limit of the industrial glass prepared in Examples 1-3 is 107-124 min, which is significantly improved compared with the comparative examples, proving that the industrial glass prepared by the present invention has excellent fire resistance performance.

[0060] Obviously, there are many other possible implementation methods under the concept of this invention. It should be stated here that any changes made under the inventive concept of this invention will fall within the protection scope of this invention.

Claims

1. A method of making a high-strength, high-temperature-resistant, fire-resistant, industrial glass, characterized in that: The preparation of the functional component, glass melting, glass substrate forming, and the preparation of industrial glass; The raw materials used include: silicon dioxide, boron oxide, aluminum oxide, sodium oxide, potassium oxide, niobium phosphate, composite reinforcing component, clarifier; The preparation of the functional component: hafnium oxide, gadolinium oxide, and zinc oxide are added to a ball mill, anhydrous ethanol is added, and ball milling is performed; then, after drying and grinding, a composite reinforcing component is obtained; cerium dioxide and tin oxide are mixed uniformly to obtain a clarifier; The glass melting: silicon dioxide, boron oxide, aluminum oxide, sodium oxide, potassium oxide, niobium phosphate, composite reinforcing component, and clarifier are uniformly mixed, and gradient heating is used for melting; then, after cooling and holding, a glass melt is obtained; The glass substrate forming: the glass melt is cast into a preheated graphite mold, and then both are placed in a holding furnace for holding; then, after cooling and holding, the temperature is reduced to room temperature to obtain a glass substrate; The preparation of industrial glass: potassium nitrate, lithium nitrate, and cesium nitrate are uniformly mixed, heated and stirred to obtain an ion exchange molten salt; the glass substrate is immersed in the ion exchange molten salt for holding and reaction; after the reaction is completed, the temperature is cooled to room temperature, and after washing and drying, industrial glass is obtained.

2. The method of claim 1, wherein the high-strength, high-temperature-resistant, fire-resistant industrial glass is prepared by the steps of: The weight parts of the raw materials used are: silicon dioxide 70-85 parts, boron oxide 5-15 parts, aluminum oxide 5-10 parts, sodium oxide 2-5 parts, potassium oxide 1-3 parts, niobium phosphate 4-8 parts, composite reinforcing component 1-2 parts, and clarifier 1.5-2.5 parts. ​ 3. The method of claim 1, wherein the high-strength, high-temperature-resistant, fire-resistant industrial glass is prepared by the steps of: The mass ratio of hafnium oxide, gadolinium oxide, and zinc oxide is (1-2):(2-6):(1-3). ​ 4. The method of claim 1, wherein the high-strength, high-temperature-resistant, fire-resistant industrial glass is prepared by the steps of: The amount of anhydrous ethanol used is 1.5 times the total mass of hafnium oxide, gadolinium oxide, and zinc oxide. ​ 5. The method of claim 1, wherein the high-strength, high-temperature-resistant, fire-resistant industrial glass is prepared by the steps of: The ball milling: the ball-to-material ratio is 5:1, the ball milling time is 2-3 h, and the rotation speed is 300-400 rpm. ​ 6. The method of claim 1, wherein the high-strength, high-temperature-resistant, fire-resistant industrial glass is prepared by the steps of: The drying: the temperature is 80-100℃, and the material after ball milling is dried to a constant weight. ​ 7. The method of claim 1, wherein the high-strength, high-temperature-resistant, fire-resistant industrial glass is prepared by the steps of: The mass ratio of cerium dioxide and tin oxide is (5-6):(3-4). ​ 8. The method of claim 1, wherein the high-strength, high-temperature-resistant, fire-resistant industrial glass is prepared by the steps of: The gradient heating method: first, the temperature is increased from room temperature to 600-700℃ at a rate of 5-8℃ / min, and held for 1-1.5h; then, the temperature is increased to 1200-1300℃ at a rate of 8-10℃ / min, and held for 1.5-2h; finally, the temperature is increased to 1550-1650℃ at a rate of 5-8℃ / min, and held for 2-3h. ​ 9. The method of claim 1, wherein the high-strength, high-temperature-resistant, fire-resistant industrial glass is prepared by the steps of: The washing: the glass surface is first rinsed with deionized water for 3-4 times, and then rinsed with anhydrous ethanol for 1-2 times; the drying: the temperature is 120-130℃, and the drying time is 1-1.5h. ​ 10. The method of claim 1, wherein the high-strength, high-temperature-resistant, fire-resistant industrial glass is prepared by the steps of: The mass ratio of potassium nitrate, lithium nitrate, and cesium nitrate is (12-16):(1-2):(1-2). ​

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