Equipment and method for detecting chemical resistance stability of glass substrate

Abstract

The invention discloses equipment and a method for detecting the chemical stability of a glass substrate, relates to the technical field of glass performance detection, and aims to solve the problems of high requirements on the shape and size of a sample, complicated operation, low efficiency and large error in the conventional glass substrate detection. The equipment comprises a container body, the periphery of the container body is provided with an edge interlayer and a built-in heating assembly, the bottom of the container body is provided with a bottom interlayer and a built-in stirring assembly, a clamping assembly is arranged in the container body and used for fixing a glass substrate, and the top of the container body is provided with a feeding port and an exhaust port and connected with a pressure adjusting assembly; the clamping assembly is of a four-edge closed structure, and the upper and lower surfaces of the glass substrate are exposed to adapt to corrosion detection. The method does not need to carry out complex polishing treatment on a sample, is adaptive to glass substrates of various shapes, is convenient to operate, high in efficiency and small in error, can accurately reflect the actual chemical corrosion resistance of the glass substrate, and is suitable for glass substrate quality detection in the fields of display panels, optical instruments and the like.

Description

Technical Field

[0001] This invention relates to the field of glass performance testing technology, and more specifically, to an apparatus and method for testing the chemical stability of glass substrates. Background Technology

[0002] Glass substrates have wide applications in many fields, such as display manufacturing and optical instruments. However, in actual use, glass substrates are subject to corrosion from surrounding media (such as water, acids, alkalis, salts, and other chemicals), and their ability to resist this corrosion, i.e., chemical stability, is crucial. Existing methods for testing the chemical stability of glass have certain limitations. For example, while surface methods can reflect the characteristics of the glass surface and the material itself, they have high requirements for sample shape and size, and are demanding on the quality of the glass surface. For irregularly shaped or poorly surfaced glass, or samples with defects such as bubbles, it is difficult to accurately calculate the surface area, thus limiting the scope of application. Powder methods, although simple and effective and not requiring specific sample shape and surface quality, are affected by factors such as particle size and uniformity, glass thermal history, and the ratio of corrosive liquid to sample weight. Furthermore, traditional powder testing methods are time-consuming.

[0003] Therefore, there is an urgent need to design a new device and method to detect the chemical stability of glass substrates more efficiently and accurately. Summary of the Invention

[0004] The present invention aims to solve the problems of existing glass substrate testing methods, such as high requirements for sample shape and size, cumbersome operation, low efficiency, and large error.

[0005] To address the aforementioned problems, this invention provides an apparatus for testing the chemical stability of glass substrates, comprising a container body, a side interlayer disposed around the container body and a heating component disposed within the side interlayer, a bottom interlayer disposed at the bottom of the container body and a stirring component disposed within the bottom interlayer, a clamping component disposed within the container body for fixing the glass substrate to be tested, and an inlet and an outlet disposed at the top of the container body, the inlet being fitted with a sealing cap, and the outlet being connected to a pressure regulating component for controlling the pressure within the container body.

[0006] The present invention provides a device for testing the chemical stability of glass substrates, which, compared with the prior art, has, but is not limited to, the following beneficial effects: To address the shortcomings of existing glass substrate testing methods, such as high requirements for sample shape and size, cumbersome operation, low efficiency, and large errors, this device incorporates a heating component built into the side interlayer. This component can utilize resistance wire heating or microwave heating, enabling precise temperature control within a range of room temperature to 300℃. It provides excellent heating uniformity, ensuring a stable temperature environment for the glass sample during the reaction. A stirring component, a magnetic stirrer, is installed in the bottom interlayer. The magnetic stirring motor is located in the bottom interlayer, while the rotor is located within the container body. The rotor rotates with the motor, generating a rotating magnetic field. The rotor is pulled synchronously by this magnetic field to achieve stirring. The stirring speed can be adjusted according to different experimental requirements, ensuring proper contact between the glass sample and the chemical reaction. The reagents are thoroughly mixed to ensure the uniformity and consistency of the reaction. The clamping component is placed inside the container body, which ensures that the corroded surface of the sample is the standard test surface, facilitating the calculation of corrosion per unit area. Simultaneously, the inlet at the top of the container body is equipped with a sealing cap, and the vent is connected to a pressure regulating component via a pipe. The sealing cap ensures the container body is airtight, the heating component controls the reaction temperature, the stirring component ensures uniform mixing of the reagents, the clamping component fixes the glass substrate, and the pressure regulating component maintains stable pressure inside the container to prevent reagent boiling and leakage. This device is simple, highly operable, and can overcome the limitations of existing methods for testing the chemical stability of glass, providing a more accurate assessment of the chemical resistance of glass substrates.

[0007] Furthermore, the clamping assembly has a four-sided closed structure and is made of acid and alkali resistant material. The clamping assembly is used to expose the upper and lower surfaces of the glass substrate.

[0008] Furthermore, the clamping assembly includes a lower clamping frame and an upper clamping plate, the upper clamping plate being fitted against the inner wall of the lower clamping frame, and the outer walls of both the lower clamping frame and the upper clamping plate having corrosion openings that match the size of the exposed portion.

[0009] Furthermore, the top of the lower clamping frame and the bottom of the upper clamping plate are both provided with rounded chamfers.

[0010] Furthermore, a temperature control module is provided on the outside of the container body for controlling the internal temperature of the container body. A heating button and a stirring button are also provided on the outside of the container body.

[0011] Furthermore, the container body is made of corrosion-resistant alloy or special glass, and has a removable polytetrafluoroethylene liner inside.

[0012] This invention also provides a method for testing the chemical resistance stability of glass substrates, comprising the following steps: S1: Cut the glass substrate to be tested into fragments suitable for the clamping components, wash with ultrapure water, dry at 100℃-150℃ to constant weight, and cool to room temperature for later use; select chemical reagents according to the testing requirements and prepare reagent solutions of different concentration gradients. S2: Weigh the initial mass m0 of the dried glass substrate in step S1 using a weighing device, and fix the glass substrate by clamping components to fully expose the upper and lower surfaces to be etched of the glass substrate. S3: Inject the reagent solution prepared in step S1 into the container body, set the reaction temperature through the temperature control module, start the heating component and stirring component, and after the temperature stabilizes, put the clamping component with the glass substrate fixed into the container body to carry out the corrosion reaction. S4: After the reaction is complete, turn off the heating and stirring components. After the container body cools to room temperature, release the pressure, take out the glass substrate, rinse the glass substrate repeatedly with ultrapure water, dry the rinsed glass substrate at 100℃-150℃ to constant weight, and weigh the mass m1 after etching using a weighing device. S5: Calculate the unit area mass loss rate of the glass substrate according to the formula.

[0013] Furthermore, in step S2, the exposed portion of the upper and lower surfaces of the glass substrate within the clamping assembly has dimensions of 40.00mm × 60.00mm.

[0014] Furthermore, the formula for calculating the unit area mass loss rate in step S7 is ws = (initial mass of glass sample m0 - mass of glass sample after corrosion m1). 10000 / (40 60 2).

[0015] Furthermore, the chemical reagents in step S2 include hydrochloric acid, hydrofluoric acid, and sodium hydroxide solution, and the reaction temperature in step S4 is adjusted according to the type of reagent, with a reaction time of 20 min to 24 h. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a device for testing the chemical resistance stability of a glass substrate according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the clamping assembly in a device for testing the chemical resistance stability of a glass substrate according to an embodiment of the present invention; Figure 3 This is a schematic flowchart of a method for testing the chemical resistance stability of a glass substrate according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Container body; 2. Side interlayer; 3. Bottom interlayer; 4. Vent; 5. Clamping assembly; 51. Lower clamping frame; 52. Upper clamping plate; 53. Corrosion port; 6. Temperature control module; 7. Heating button; 8. Stirring button. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0019] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] It should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, parts, or groups of features, integers, steps, or parts.

[0023] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0024] See Figures 1-2 An apparatus for testing the chemical stability of a glass substrate according to an embodiment of the present invention includes a container body 1, a side interlayer 2 provided around the container body 1, and a heating component provided in the side interlayer 2, a bottom interlayer 3 provided at the bottom of the container body 1, and a stirring component provided in the bottom interlayer 3, a clamping component 5 provided in the container body 1 for fixing the glass substrate to be tested, and a feed inlet and an exhaust outlet 4 provided at the top of the container body 1, a sealing cap provided in the feed inlet, and a pressure regulating component connected to the exhaust outlet 4 for controlling the pressure inside the container body 1.

[0025] In this embodiment, addressing the problems of existing glass substrate testing methods, such as high requirements for sample shape and size, cumbersome operation, low efficiency, and large errors, the device incorporates a heating component built into the side interlayer 2. This heating component can employ resistance wire heating or microwave heating, enabling precise temperature control within a range of room temperature to 300°C. It provides excellent heating uniformity, ensuring a stable temperature environment for the glass sample during the reaction. A stirring component, a magnetic stirrer, is installed in the bottom interlayer 3. The magnetic stirring motor is located in the bottom interlayer 3, while the rotor is located in the container body 1. The rotor rotates with the motor, generating a rotating magnetic field. The rotor, pulled by this magnetic field, rotates synchronously to achieve stirring. The stirring speed can be adjusted according to different experimental requirements, ensuring proper contact between the glass sample and the magnetic field. The chemical reagents are thoroughly mixed to ensure the uniformity and consistency of the reaction. The clamping component 5 is placed inside the container body 1. With the help of the clamping component 5, the corroded surface of the sample to be tested can be used as the standard test surface, which is convenient for calculating the corrosion amount per unit area. At the same time, the feed port at the top of the container body 1 is equipped with a sealing cap, and the exhaust port 4 is connected to the pressure regulating component through a pipe. The sealing cap ensures that the container body 1 is sealed, the heating component regulates the reaction temperature, the stirring component ensures that the reagents are mixed evenly, the clamping component 5 fixes the glass substrate, and the pressure regulating component maintains the pressure inside the container to prevent the reagent from boiling and leaking. This device is simple, highly operable, and can make up for the limitations of existing methods for testing the chemical stability of glass, and more accurately test the chemical resistance stability of glass substrates.

[0026] Optional, please refer to Figure 2 The clamping component 5 has a four-sided closed structure and is made of acid and alkali resistant material. The clamping component 5 is used to expose the upper and lower surfaces of the glass substrate.

[0027] In this embodiment, the clamping component 5 is a four-sided closed frame structure made of acid and alkali resistant PVDF. When clamped, it is completely attached to the surface of the glass substrate, with only the upper and lower surfaces exposed through the corrosion port 53, and the rest sealed and isolated. After the glass substrate is clamped, only the upper and lower surfaces of a fixed area come into contact with the chemical reagent, avoiding side corrosion from affecting the test results. At the same time, there is no need to consider the original shape of the sample, and it can be adapted to irregular or defective glass substrates.

[0028] Optional, please refer to Figure 2 The clamping assembly 5 includes a lower clamping frame 51 and an upper clamping plate 52. The upper clamping plate 52 is fitted to the inner wall of the lower clamping frame 51. The outer walls of both the lower clamping frame 51 and the upper clamping plate 52 are provided with corrosion openings 53 that match the size of the exposed portion.

[0029] In this embodiment, the lower clamping frame 51 has a groove structure, and the upper clamping plate 52 has a flat plate structure. The two are precisely matched in size, and the etching port 53 is consistent with the size of the exposed surface. After the upper clamping plate 52 is inserted into the lower clamping frame 51, it fits completely without any loose gaps. In use, the glass substrate is placed in the groove of the lower clamping frame 51, and the upper clamping plate 52 is covered to align the upper and lower surfaces of the glass substrate with the etching port 53, ensuring that the exposed area is fixed. Furthermore, the lower clamping frame 51 and the upper clamping plate 52 can be clamped with a clamp to ensure that the glass substrate fits tightly with the lower clamping frame 51 and the upper clamping plate 52, effectively preventing reagent leakage from the clamping gaps.

[0030] Optional, please refer to Figure 2 The top of the lower clamping frame 51 and the bottom of the upper clamping plate 52 are both provided with rounded chamfers.

[0031] In this embodiment, the inner edge of the top of the lower clamping frame 51 and the outer edge of the bottom of the upper clamping plate 52 are both machined with a 30° rounded chamfer, and the chamfer surface is smooth and burr-free; during assembly, the rounded chamfer guides the upper clamping plate 52 to quickly and smoothly embed into the lower clamping frame 51, making the operation more convenient.

[0032] Optional, please refer to Figure 1 A temperature control module 6 is provided on the outside of the container body 1 to control the internal temperature of the container body 1. A heating button 7 and a stirring button 8 are also provided on the outside of the container body 1.

[0033] In this embodiment, the temperature control module 6 is installed on the middle of the outer side of the container body 1 and is an LCD touch screen. The heating button 7 and the stirring button 8 are waterproof buttons and are electrically connected to the driving circuits of the heating component and the stirring component, respectively. The target reaction temperature and the holding time are set by the temperature control module 6. Pressing the heating button 7 starts the heating component and pressing the stirring button 8 starts the stirring component. The actual temperature is displayed in real time, which is convenient for operators to monitor.

[0034] Optionally, the container body 1 is made of corrosion-resistant alloy or special glass, and has a removable polytetrafluoroethylene liner inside.

[0035] In this embodiment, the container body 1 is made of stainless steel corrosion-resistant alloy material, with an internal polytetrafluoroethylene (PTFE) liner of 5mm thickness. The liner is detachably connected to the container body 1 via buckles, and its surface is smooth and free of scratches. The corrosion-resistant alloy material ensures the strength of the container body 1, while the PTFE liner is chemically inert, preventing reactions with the acid and alkali reagents used in the test and preventing secondary reactions between the glass sample and the container wall, thus ensuring accurate test results. The liner is removable for easy cleaning and replacement, leaving no reagent residue contamination and adapting to different types of reagent testing. The container body 1 is temperature and pressure resistant and can operate continuously at 300℃ and 0.5MPa, resulting in better performance.

[0036] This invention also provides a method for testing the chemical resistance stability of glass substrates, comprising the following steps: S1: Cut the glass substrate to be tested into fragments that fit the clamping component 5, wash with ultrapure water, dry at 100℃-150℃ to constant weight, and cool to room temperature for later use; select chemical reagents according to the testing requirements and prepare reagent solutions of different concentration gradients. S2: Weigh the initial mass m0 of the glass substrate after drying in step S1 using a weighing device, and fix the glass substrate by clamping assembly 5 so that the upper and lower surfaces to be etched on the glass substrate are fully exposed. S3: Inject the reagent solution prepared in step S1 into container body 1, set the reaction temperature through temperature control module 6, start the heating component and stirring component, and after the temperature stabilizes, put the clamping component 5 with the glass substrate fixed into container body 1 to carry out the corrosion reaction. S4: After the reaction is complete, turn off the heating and stirring components. After the container body 1 cools to room temperature, release the pressure, take out the glass substrate, rinse the glass substrate repeatedly with ultrapure water, dry the rinsed glass substrate at 100℃-150℃ to constant weight, and weigh the mass m1 after etching using a weighing device. S5: Calculate the unit area mass loss rate of the glass substrate according to the formula.

[0037] Optionally, in step S2, the exposed portion of the upper and lower surfaces of the glass substrate inside the clamping assembly 5 has a size of 40.00mm × 60.00mm.

[0038] Optionally, the formula for calculating the unit area mass loss rate in step S7 is ws = (initial mass of glass sample m0 - mass of glass sample after corrosion m1). 10000 / (40 60 2).

[0039] Optionally, the chemical reagents in step S2 include hydrochloric acid, hydrofluoric acid, and sodium hydroxide solution, and the reaction temperature in step S4 is adjusted according to the type of reagent, with a reaction time of 20 min to 24 h.

[0040] The following detailed description of the method for testing the chemical resistance stability of glass substrates proposed in this disclosure is provided through specific embodiments.

[0041] Example 1

[0042] Step 1: Cut the selected production line glass substrate into 50mm pieces. Six 80mm sample pieces were cleaned with ultrapure water to remove surface impurities and dust, then dried in an oven at 100℃-150℃ to constant weight, and cooled to room temperature for later use. Three solutions were prepared: 5%wt hydrochloric acid solution, 10%wt hydrofluoric acid solution, and 5%wt sodium hydroxide solution, with 500mL of each solution for parallel experiments. Step Two: Take the glass sample from Step One, weigh its initial mass m0 after drying using an analytical balance, and clamp it with clamping component 5, ensuring that clamping component 5 completely adheres to the glass sample to be tested, and that the exposed upper and lower surfaces of clamping component 5 completely cover the glass sample, guaranteeing a fixed size and area of ​​the corroded glass sample, with the exposed portion measuring 40.00mm × 60.00mm; then, add different concentrations and types of chemical reagents prepared in Step One to the reaction vessel of this equipment; set the experimental temperature of the reaction vessel, turn on the heating device, and start the stirring device to ensure thorough mixing of the reagents and a uniform temperature field. Specific temperatures are shown in Table 1. Step 3: Add the chemical reagents of different concentrations and types prepared in Step 1 into container body 1; set the experimental temperature of the reaction container, turn on the heating component, and start the stirring component to ensure that the reagents are fully mixed and the temperature field is uniform. See Table 1 for specific temperatures. After the temperature reaches the experimental temperature, put the clamped glass sample into the reaction container to carry out the reaction. Step 4: After the reaction is complete, turn off the heating and stirring components. After the container body 1 cools to room temperature, open the exhaust port 4 to release the pressure, take out the glass substrate, rinse the glass substrate repeatedly with ultrapure water, dry the rinsed glass substrate at 100℃-150℃ to constant weight, and weigh the mass m1 of the dried glass sample after etching using an analytical balance. Step 5: According to the formula ws = (initial mass of glass sample m0 - mass of glass sample after corrosion m1) 10000 / (40 60 2) Calculate the mass loss rate per unit area of ​​the glass substrate.

[0043] The statistical data is shown in Table 1.

[0044] Table 1

[0045] Data comparison shows that it meets the requirements of the national standard "GB / T31958-2023 Substrate Glass for Amorphous Silicon Thin Film Transistor Liquid Crystal Displays": 10%HF / 22℃ / 20min weight loss ≤6.2mg / cm2; 5%NaOH / 95℃ / 24h weight loss ≤1.8mg / cm2; 5%HCl / 95℃ / 24h weight loss ≤0.9mg / cm2.

[0046] Comparative Example 1

[0047] The glass substrates selected from the production line were subjected to chemical stability tests using three different chemical solutions. The tests were conducted according to the specific requirements and operating methods outlined in GB / T31958-2023, "Substrate Glass for Amorphous Silicon Thin Film Transistor Liquid Crystal Displays." The specific testing steps are as follows: Step 1: Cut the selected production line glass substrate into 50mm pieces. Six 80mm sample pieces were prepared. The four sides of each sample piece were manually sanded and polished using a glass grinding and polishing machine to ensure that there were no burrs, cracks, or chipping. After the edge sanding and polishing of the sample pieces was completed, the roughness of the glass sample pieces was tested according to the method of GB / T32642 "Measurement Method of Surface Roughness of Flat Panel Display Substrate Glass" and recorded in Table 2. Step 2: Clean the sample with ultrapure water to remove impurities and dust from the surface. Then, place it in an oven and dry it at 100℃-150℃ until constant weight. After cooling to room temperature, weigh the initial mass m0, length, width and thickness of the sample, and record them in Table 3. After the measurement is completed, set it aside for later use. Step 3: Prepare 500 mL of each of the following solutions: 5% wt hydrochloric acid solution, 10% wt hydrofluoric acid solution, and 5% wt sodium hydroxide solution, for parallel experiments. Step 4: After placing the etching solution into the container, adjust the temperature of the water bath to meet the test requirements. Step 5: Place the samples from Step 1 into the containers in the constant temperature water bath according to the test requirements, keep them for a fixed time, then remove them, wash them with ultrapure water, dry them, and weigh them (m1). Repeat this process to complete the corrosiveness test of the remaining chemical solutions.

[0048] The statistical data are shown in Tables 2 and 3.

[0049] Table 2

[0050] Table 3

[0051] Comparative Example 2

[0052] The glass substrates selected from the production line were subjected to chemical stability tests using three different chemical solutions. The tests were conducted according to the specific requirements and operating methods outlined in GB / T31958-2023, "Substrate Glass for Amorphous Silicon Thin Film Transistor Liquid Crystal Displays." The specific testing steps are as follows: Step 1: Cut the selected production line glass substrate into 50mm pieces. Six 80mm sample pieces were prepared. The four sides of each sample piece were automatically polished on the production line using a precision chemical polishing process to ensure that there were no burrs, cracks, or chipping. After the edge polishing of the sample pieces was completed, the roughness of the glass sample pieces was tested according to the method of GB / T32642 "Measurement Method of Surface Roughness of Flat Panel Display Substrate Glass" and the results were recorded in Table 4. Step 2: Clean the sample with ultrapure water to remove impurities and dust. Then place it in an oven and dry it at 100℃-150℃ until constant weight. After cooling to room temperature, weigh the initial mass m0, length, width and thickness of the sample, and record them in Table 5. After the measurement is completed, set it aside for later use. Step 3: Prepare 500 mL of each of the following solutions: 5% wt hydrochloric acid solution, 10% wt hydrofluoric acid solution, and 5% wt sodium hydroxide solution, for parallel experiments. Step 4: After placing the etching solution into the container, adjust the temperature of the water bath to meet the test requirements. Step 5: Place the samples from Step 1 into the containers in the constant temperature water bath according to the test requirements, keep them for a fixed time, then remove them, wash them with ultrapure water, dry them, and weigh them (m1). Repeat this process to complete the corrosiveness test of the remaining chemical solutions.

[0053] The statistical data are shown in Tables 4 and 5.

[0054] Table 4

[0055] Table 5

[0056] The examples and comparative data are shown below: The chemical stability weight loss of the glass substrates on the production line under the three chemical etching solutions all met the standard requirements. In Comparative Example 1 and Comparative Example 2, the method of "GB / T31958-2023 Substrate Glass for Amorphous Silicon Thin Film Transistor Liquid Crystal Display" was used for testing. However, the edge of the sample in Comparative Example 1 was manually polished by a grinding and polishing machine, while the edge of the sample in Comparative Example 2 was subjected to a precision chemical polishing process. The surface roughness of Comparative Example 1 after polishing was significantly greater than that of Comparative Example 2 after polishing. The roughness of the sample edges after manual polishing is relatively large, which affects the accuracy of dimensional changes. As a result, the observed data shows that some data differs relatively greatly. In contrast, the sample treated with precision chemical polishing has a lower roughness, and the data is relatively stable and basically consistent with the data in Example 1.

[0057] Through the examples and comparative examples, and the verification of the comparative examples, the method of the present invention arrives at the same conclusion, which can verify the effectiveness of the present invention.

[0058] Furthermore, Example 1 eliminates the need for sample polishing and grinding, making it suitable for glass substrates of various shapes and surface conditions. Its sealed design prevents reagent leakage, resulting in safety and applicability far exceeding traditional methods. Secondly, the detection method in Example 1 is more closely aligned with the actual usage conditions of glass substrates, providing accurate data support for product quality assessment. In contrast, the results of powder method detection are out of touch with actual applications, and the adaptability of surface method is limited.

[0059] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. An apparatus for testing the chemical stability of glass substrates, characterized in that, The container includes a container body (1), which has a side interlayer (2) around its perimeter and a heating component in the side interlayer (2). The container body (1) has a bottom interlayer (3) at its bottom and a stirring component in the bottom interlayer (3). The container body (1) has a clamping component (5) for fixing the glass substrate to be tested. The container body (1) also has an inlet and an exhaust port (4) at its top. The inlet is fitted with a sealing cap, and the exhaust port (4) is connected to a pressure regulating component for controlling the pressure inside the container body (1).

2. The apparatus for testing the chemical stability of glass substrates according to claim 1, characterized in that, The clamping component (5) is a four-sided closed structure and is made of acid and alkali resistant material. The clamping component (5) is used to expose the upper and lower surfaces of the glass substrate.

3. The apparatus for testing the chemical stability of glass substrates according to claim 2, characterized in that, The clamping assembly (5) includes a lower clamping frame (51) and an upper clamping plate (52). The upper clamping plate (52) is in contact with the inner wall of the lower clamping frame (51). The outer walls of the lower clamping frame (51) and the upper clamping plate (52) are both provided with corrosion openings (53) that match the size of the exposed part.

4. The apparatus for testing the chemical stability of glass substrates according to claim 3, characterized in that, The top of the lower clamping frame (51) and the bottom of the upper clamping plate (52) are both provided with rounded chamfers.

5. The apparatus for testing the chemical stability of glass substrates according to claim 1, characterized in that, A temperature control module (6) is provided on the outside of the container body (1) for controlling the internal temperature of the container body (1). A heating button (7) and a stirring button (8) are also provided on the outside of the container body (1).

6. The apparatus for testing the chemical stability of glass substrates according to claim 1, characterized in that, The container body (1) is made of corrosion-resistant alloy or special glass, and has a removable polytetrafluoroethylene liner inside.

7. A method for testing the chemical resistance stability of glass substrates, based on the equipment for testing the chemical resistance stability of glass substrates according to any one of claims 1-6, characterized in that, Includes the following steps: S1: Cut the glass substrate to be tested into fragments that fit the clamping assembly (5), wash with ultrapure water, dry at 100℃-150℃ to constant weight, and cool to room temperature for later use; select chemical reagents according to the testing requirements and prepare reagent solutions with different concentration gradients. S2: Weigh the initial mass m0 of the glass substrate after drying in step S1 using a weighing device, and fix the glass substrate by clamping assembly (5) so that the upper and lower surfaces to be etched on the glass substrate are fully exposed. S3: Inject the reagent solution prepared in step S1 into the container body (1), set the reaction temperature through the temperature control module (6), start the heating component and stirring component, and after the temperature stabilizes, put the clamping component (5) with the glass substrate fixed into the container body (1) to carry out the corrosion reaction. S4: After the reaction is completed, turn off the heating and stirring components. After the container body (1) cools to room temperature, release the pressure, take out the glass substrate, rinse the glass substrate repeatedly with ultrapure water, dry the rinsed glass substrate at 100℃-150℃ to constant weight, and weigh the mass m1 after corrosion using a weighing device. S5: Calculate the unit area mass loss rate of the glass substrate according to the formula.

8. The method for testing the chemical resistance stability of a glass substrate according to claim 7, characterized in that, In step S2, the exposed dimensions of the upper and lower surfaces of the glass substrate inside the clamping assembly (5) are 40.00mm × 60.00mm.

9. The method for testing the chemical resistance stability of a glass substrate according to claim 8, characterized in that, The formula for calculating the unit area mass loss rate in step S7 is ws = (initial mass of glass sample m0 - mass of glass sample after corrosion m1). 10000 / (40 60 2).

10. The method for testing the chemical resistance stability of a glass substrate according to claim 7, characterized in that, The chemical reagents in step S2 include hydrochloric acid, hydrofluoric acid, and sodium hydroxide solution. The reaction temperature in step S4 is adjusted according to the type of reagent, and the reaction time is 20 min to 24 h.

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