Device and method for detecting slump of raw material for glass substrate

Abstract

The invention discloses a slump detection method of a raw material for a glass substrate. The slump detection method comprises the following steps: performing high-temperature pre-melting treatment on the raw material; performing annealing and heat preservation treatment on the raw materials after high-temperature melting; and carrying out slump analysis treatment on the annealed, insulated and hardened raw materials. According to the method, the problems that in the period of developing new raw materials or switching the raw materials, due to the fact that the test period is long, the temperature environment for melting frits in a high-temperature smelting furnace is different from that of an actual production line melting process, the process system of a production line cannot be completely copied, and the characteristics of the raw materials cannot be completely reflected can be solved. By means of the device and the detection method, the range of raw materials for glass substrate production can be expanded, stable production of the glass substrate is further guaranteed from the aspects of quality improvement and risk management and control, and meanwhile development of large-size glass substrates with increasing requirements is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of raw material detection for glass substrates, and in particular to a slump detection device and method for raw material detection for glass substrates. Background Art

[0002] With the vigorous development of the display panel industry at home and abroad, domestic display panel technology has also developed rapidly. Substrate glass is the key glass material for thin-film transistor displays, and as an important component of the panel, it has become particularly important. In the production of substrate glass, various raw materials involved in the batching play an important role. It is precisely because of the different types or proportions of raw materials used that the performance of the glass substrate is different. Therefore, in the process of production batching, how to choose the appropriate raw materials or whether the raw materials are suitable for the melting process of the production line during the switching process is a key issue in the adjustment of the production line process.

[0003] At present, there is no quick and easy method that can fully reflect the melting diffusion of raw materials under high temperature conditions. In the existing process production, switching to raw materials from new manufacturers often relies on the design of the material to conduct melting experiments. The number of bubbles in the glass frit finally melted in the high-temperature furnace reflects the quality of the raw materials. Not only is the test cycle long, but there are also disadvantages: the temperature environment of the high-temperature furnace melting frit is different from the actual production line melting process, and the process system of the production line cannot be completely replicated, so that the characteristics of the raw materials cannot be fully reflected. Summary of the invention

[0004] In order to make up for the problem that there is currently no quick and simple detection method that can fully reflect the melting diffusivity of raw materials under high temperature conditions, and to address the shortcomings of the existing technology, in order to solve the problem that during the development of new raw materials or the switching of raw materials, due to the long test cycle, the temperature environment of the high-temperature furnace melting the frit is different from the actual production line melting process, and the process system of the production line cannot be completely replicated, so that the characteristics of the raw materials cannot be fully reflected. The present invention provides a slump detection device and method for raw materials for glass substrates. Specifically, the slump of the raw materials in the high-temperature molten state is detected by a designed detection device or detection method to reflect the melting condition of the raw materials under the condition of adapting to the melting process temperature of the production line.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A method for detecting the slump of raw materials for glass substrates comprises the following steps:

[0007] S1. The raw materials are subjected to high-temperature pre-melting treatment, the melting point range of the raw materials of the experimental object is determined, and the high-temperature pre-melting treatment is performed according to the temperature rise curve of the set high-temperature lifting furnace. During the high-temperature pre-melting treatment, the raw materials are loaded through the carrying unit. After the high-temperature pre-melting treatment, the raw materials are naturally cooled and taken out of the high-temperature lifting furnace;

[0008] S2. The raw materials after high-temperature melting are subjected to annealing and heat preservation treatment. The bearing unit loaded with the raw materials is placed in a resistance furnace for annealing and heat preservation treatment to eliminate the stress effect of the raw materials during the high-temperature melting process and prevent overcooling and cracking;

[0009] S3. Perform slump analysis on the raw materials after annealing and heat preservation hardening. Place the supporting unit loaded with the raw materials on the detection unit, and peel off the raw materials and the supporting unit to perform slump analysis on the molten and sintered raw materials on the detection unit to determine the melting effect of the experimental raw materials.

[0010] As a further solution of the present invention: In step S1, the specific heating strategy steps for performing high temperature pre-melting treatment according to the heating curve of the high temperature lifting furnace are as follows:

[0011] 1) The high-temperature lifting furnace heats the raw materials of the experimental object from room temperature to 1000°C for 3 hours and keeps them at 1000°C for 1 hour;

[0012] 2) Raise the temperature from 1000°C to 1100°C for 10 minutes and keep at 1100°C for 1 hour;

[0013] 3) Raise the temperature from 1100°C to 1200°C for 10 minutes and keep at 1200°C for 1 hour;

[0014] 4) Raise the temperature from 1200°C to 1300°C for 10 minutes and keep at 1300°C for 1 hour;

[0015] 5) Raise the temperature from 1300°C to 1400°C for 10 minutes and keep at 1400°C for 1 hour;

[0016] 6) Raise the temperature from 1400°C to 1500°C for 10 minutes and keep at 1500°C for 1 hour;

[0017] 7) Raise the temperature from 1500°C to 1600°C for 10 minutes and keep at 1600°C for 1 hour;

[0018] 8) Raise the temperature from 1600°C to 1650°C in 5 minutes and keep at 1650°C for 1 hour.

[0019] As a further solution of the present invention: the heating frequency of the high temperature lifting furnace in the specific heating strategy steps 1) to 8) is 10°C / min.

[0020] As a further solution of the present invention: when the raw materials are loaded through the carrying unit in step S1, the raw materials are filled in the loading container included in the carrying unit, and the loading container is a cylindrical structure formed by two half-open shells through a buckle-type opener hinge.

[0021] As a further solution of the present invention: in step S2, the insulation temperature during the annealing and insulation treatment in the resistance furnace is 730°C±20°C, and the insulation treatment time is 1 hour.

[0022] As a further solution of the present invention: when the carrying unit loaded with raw materials is placed on the detection unit in step S3, the detection unit includes a circular stainless steel evaluation plate, the loading container is placed on the stainless steel evaluation plate, the loading container is hingedly opened to allow the raw materials to be peeled off and exposed at the center of the stainless steel evaluation plate, and a slump analysis is performed through the slump grading area on the stainless steel evaluation plate to determine the melting effect of the experimental raw materials.

[0023] As a further solution of the present invention: the center of the stainless steel evaluation plate is set as a bearing unit placement area, and a slump level 2 area, a slump level 3 area and a slump level 4 area are radiated outward with increasing radius.

[0024] A raw material slump detection device for glass substrates comprises a bearing unit and a detection unit, wherein the bearing unit comprises a loading container for filling the raw material of the experimental object, and the loading container is a cylindrical structure formed by two half-open shells through a buckle-type opener hinge; the detection unit comprises a stainless steel evaluation plate, the center of the stainless steel evaluation plate is set as a bearing unit placement area, and a 2nd level slump area, a 3rd level slump area and a 4th level slump area are radiated outward in increasing radius from the bearing unit placement area;

[0025] Among them, when the loading container places the raw materials that have been melted at high temperature and annealed and hardened on the stainless steel evaluation plate, the loading container peels off the raw materials and exposes them at the center of the stainless steel evaluation plate. The stainless steel evaluation plate analyzes the slump of the raw materials in the 2nd slump zone, the 3rd slump zone, or the 4th slump zone to determine the melting effect of the experimental raw materials.

[0026] As a further solution of the present invention: the loading container is provided with a snap handle for opening or closing the two half-open shells.

[0027] As a further solution of the present invention: a container split center line is set at the bottom of the loading container, and a cross scale positioning line is set through the center position of the stainless steel evaluation plate.

[0028] Beneficial effects of the present invention:

[0029] (1) The slump detection method or device for raw materials for glass substrates of the present application evaluates the degree of melting by detecting the slump of the raw materials after high-temperature melting. The raw materials in the loading container are pre-melted at high temperature. The raw materials after high-temperature melting will harden when cooled. The hardened raw materials will have different diffusion ranges due to the influence of the shape of the external fixed loading container and the degree of melting, and then the part that has not diffused and contacted the melt will cause collapse. The slump range is then detected by a stainless steel evaluation plate to evaluate the high-temperature melting diffusivity of the raw materials.

[0030] (2) This application can solve the problem that during the development of new raw materials or the switching of raw materials, due to the long test cycle, the temperature environment of the high-temperature furnace for melting the frit is different from the actual production line melting process, and the process system of the production line cannot be completely replicated, so that the characteristics of the raw materials cannot be fully reflected. Through the device and detection method of the present invention, the range of raw materials for glass substrate production can be expanded, and the stable production of glass substrates can be further guaranteed from the perspective of quality improvement and risk control. At the same time, it is also beneficial to the development of large-size glass substrates that are increasingly in demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] Figure 1 is a flow chart of a method for detecting the slump of raw materials for a glass substrate of the present invention;

[0033] Figure 2 It is a schematic diagram of the structure of the bearing unit of the raw material slump detection device for glass substrate of the present invention;

[0034] Figure 3 The present invention is a schematic diagram of the structure of a detection and evaluation unit of a slump detection device for raw materials for a glass substrate.

[0035] In the figure: 1. snap handle; 2. loading container; 3. center line of container split; 4. snap-on opener and closeer; 5. stainless steel evaluation plate; 51. load-bearing unit placement area; 52. level 2 slump area; 53. level 3 slump area; 54. level 4 slump area; 55. cross scale positioning line. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in the description of the present invention, the meaning of "multiple" and "several" is at least two, for example two, three, etc., unless otherwise clearly and specifically defined.

[0038] See also Figure 1 As shown, the present invention is a method for detecting the slump of raw materials for glass substrates, comprising the following steps:

[0039] S1. The raw materials are subjected to high-temperature pre-melting treatment. The melting point range of the raw materials of the experimental object is determined. The high-temperature pre-melting treatment is performed according to the temperature rise curve of the set high-temperature lifting furnace. During the high-temperature pre-melting treatment, the raw materials are loaded through the carrying unit. After the high-temperature pre-melting treatment, the raw materials are naturally cooled and taken out of the high-temperature lifting furnace.

[0040] In this step, the specific heating strategy steps for high-temperature pre-melting treatment according to the heating curve of the high-temperature lifting furnace are as follows: 1) The high-temperature lifting furnace heats the raw materials of the experimental object from room temperature to 1000°C for 3 hours, and keeps them at 1000°C for 1 hour; 2) Heats from 1000°C to 1100°C for 10 minutes, and keeps them at 1100°C for 1 hour; 3) Heats from 1100°C to 1200°C for 10 minutes, and keeps them at 1200°C for 1 hour; 4) Heats from 1200°C to 1300°C for 10 minutes, and keeps them at 1300°C for 1 hour; 5) Heats from 1300°C to 1400°C , it takes 10 minutes, and keep it at 1400℃ for 1 hour; 6) raise the temperature from 1400℃ to 1500℃, it takes 10 minutes, and keep it at 1500℃ for 1 hour; 7) raise the temperature from 1500℃ to 1600℃, it takes 10 minutes, and keep it at 1600℃ for 1 hour; 8) raise the temperature from 1600℃ to 1650℃, it takes 5 minutes, and keep it at 1650℃ for 1 hour; In this step, the maximum temperature of the raw materials for high-temperature pre-melting treatment is close to the melting point temperature of the raw materials, and when the melting point temperature of the raw materials is too high, 1650℃ can be used as the upper limit temperature, and at the same time, the melting conditions of the same type of raw materials from different sources can be compared.

[0041] The specific heating strategy steps 1) to 8) have a heating frequency of 10°C / min for the high-temperature lifting furnace; so that the present application utilizes a high-temperature lifting furnace to control the heating of raw materials at different temperatures, and then performs high-temperature melting and sintering.

[0042] When the raw materials are loaded through the carrying unit in this step, the raw materials are filled in the loading container 2 included in the carrying unit. The loading container 2 is a cylindrical structure formed by two half-open shells hinged by a buckle type opener and closer 4.

[0043] S2. The raw materials after high-temperature melting are subjected to annealing and heat preservation treatment. The carrier unit loaded with the raw materials is placed in a resistance furnace for annealing and heat preservation treatment to eliminate the stress influence during the high-temperature melting process of the raw materials and prevent explosion caused by overcooling.

[0044] In this step, the insulation temperature during annealing and insulation treatment in the resistance furnace is 730°C ± 20°C, and the insulation treatment time is 1 hour.

[0045] S3. Perform slump analysis on the raw materials after annealing and heat preservation hardening. Place the supporting unit loaded with the raw materials on the detection unit, and peel off the raw materials and the supporting unit to perform slump analysis on the molten and sintered raw materials on the detection unit to determine the melting effect of the experimental raw materials.

[0046] In this step, when the carrying unit loaded with raw materials is placed on the detection unit, the detection unit includes a circular stainless steel evaluation plate 5, and a loading container 2 is placed on the stainless steel evaluation plate 5. The loading container 2 is hinged to open the raw materials at the center of the stainless steel evaluation plate 5 so that they are peeled off and exposed. The slump analysis is performed through the slump grading area on the stainless steel evaluation plate 5 to determine the melting effect of the experimental raw materials.

[0047] When the stainless steel evaluation plate 5 is designed, the center of the stainless steel evaluation plate 5 is set as a bearing unit placement area 51, and the second-level slump area 52, the third-level slump area 53 and the fourth-level slump area 54 are radiated outward in increasing radius from the bearing unit placement area 51.

[0048] like Figure 2 and Figure 3 As shown, the present invention also provides a slump detection device for raw materials for glass substrates, including a bearing unit and a detection unit, the bearing unit includes a loading container 2 for filling the raw materials of the experimental object, the loading container 2 is a cylindrical structure formed by two half-open shells hinged by a buckle type opener and closer 4; the detection unit includes a stainless steel evaluation plate 5, the center position of the stainless steel evaluation plate 5 is set as a bearing unit placement area 51, and radiates outward from the bearing unit placement area 51 to the outside with increasing radius in sequence to form a 2nd level slump area 52, a 3rd level slump area 53 and a 4th level slump area 54.

[0049] Among them, when the loading container 2 places the raw materials that have been melted at high temperature and annealed and hardened on the stainless steel evaluation plate 5, the loading container 2 peels off the raw materials and exposes them at the center of the stainless steel evaluation plate 5. The stainless steel evaluation plate 5 analyzes the collapse of the raw materials in the second slump area 52, the third slump area 53, or the fourth slump area 54 to determine the melting effect of the experimental raw materials.

[0050] The loading container 2 is provided with a snap handle 1 for opening or closing the two half-open shells, so that the loading container 2 can be opened or closed by hinges of the snap handle 1 .

[0051] A container split center line 3 is set at the bottom of the loading container 2, and a cross scale positioning line 55 is set through the center position of the stainless steel evaluation plate 5, so that the container split center line 3 can quickly correspond to the cross scale positioning line 55 to ensure that the loading container 2 is placed at the center position of the stainless steel evaluation plate 5.

[0052] The slump detection method or device for raw materials for glass substrates of the present application evaluates the degree of melting by detecting the slump of the raw materials after high-temperature melting. The detection principle is: the raw materials are subjected to high-temperature pre-melting treatment, and the surface of the raw materials that contact the high temperature will first melt, and then the melted raw materials will erode and diffuse from the outside to the inside. When the temperature rises to a certain required temperature, the raw materials will gradually melt into a liquid state. At this time, the shape of the raw materials after melting will be affected by the shape of the external loading container 2. Once the raw materials after high-temperature melting are cooled, they will harden. The hardened raw materials will have different diffusion ranges due to the influence of the shape of the external fixed loading container 2 and the degree of melting, and then the parts that have not diffused and contacted the melt will cause collapse. The slump range is detected by the stainless steel evaluation plate 5 to evaluate the high-temperature melting diffusivity of the raw materials.

[0053] This application can solve the problem that during the development of new raw materials or switching of raw materials, due to the long test cycle, the temperature environment of the high-temperature furnace melting the frit is different from the actual production line melting process, and the process system of the production line cannot be completely replicated, so that the characteristics of the raw materials cannot be fully reflected. Through the device and detection method of the present invention, the range of raw materials for glass substrate production can be expanded, and the stable production of glass substrates can be further guaranteed from the perspective of quality improvement and risk control, which is also beneficial to the development of large-size glass substrates that are increasingly in demand.

[0054] The following will describe in detail the application of slump detection of raw materials for glass substrates in conjunction with specific examples 1 and 2.

[0055] Example 1

[0056] The raw materials of the experimental object of this embodiment are selected from quartz sand for slump detection and verification. Quartz sand from manufacturers A, B and C are selected for slump detection experiments respectively. The detection device and detection method provided by the present invention are specifically:

[0057] Determine the refractory temperature of quartz sand to be 1750℃, set the heating curve of the high-temperature lifting furnace with an upper limit temperature of 1650℃, set the high-temperature resistance furnace to 730℃, and keep it warm for standby use.

[0058] The program setting of the high temperature lifting furnace heating curve is as follows: 1) It takes 3 hours to heat from room temperature to 1000℃, and keep it at 1000℃ for 1 hour; 2) It takes 10 minutes to heat from 1000℃ to 1100℃, and keep it at 1100℃ for 1 hour; 3) It takes 10 minutes to heat from 1100℃ to 1200℃, and keep it at 1200℃ for 1 hour; 4) It takes 10 minutes to heat from 1200℃ to 1300℃, and keep it at 1300℃ Keep warm for 1 hour; 5) Raise the temperature from 300℃ to 1400℃ for 10 minutes, and keep warm at 1400℃ for 1 hour; 6) Raise the temperature from 1400℃ to 1500℃ for 10 minutes, and keep warm at 1500℃ for 1 hour; 7) Raise the temperature from 1500℃ to 1600℃ for 10 minutes, and keep warm at 1600℃ for 1 hour; 8) Raise the temperature from 1600℃ to 1650℃ for 5 minutes, and keep warm at 1650℃ for 1 hour.

[0059] Open the loading container 2 of the loading unit, load the quartz sand to be tested, and fill the loading container 2 completely. Close the buckle handle 1 to completely close the loading container 2, and put it into the high-temperature lifting furnace with the temperature rising program set for high-temperature melting.

[0060] After the programmed temperature rise is completed, the loading container 2 containing the quartz sand is taken out and placed in a high-temperature resistance furnace which has been kept at 730° C. for stress relief and heat preservation for 1 hour.

[0061] After the cold zone is removed, the loading container 2 is placed at the center of the crosshairs of the stainless steel evaluation plate 5, and the loading container 2 is hinged open to expose the molten and sintered raw materials inside.

[0062] Observe the collapse edge range of the raw materials and determine the melting effect of the experimental raw materials;

[0063] Refer to the above steps, gradually complete all the samples to be tested, and record the slump grade. The specific slump grade of quartz sand corresponding to the manufacturer is shown in Table 1.

[0064] Table 1 Quartz sand corresponding to the manufacturer's slump grade

[0065] factory Manufacturer A Manufacturer B C Manufacturer Slump grade Level 2 Level 4 Level 3

[0066] Comparative Example 1

[0067] In order to verify that the detection device and detection method of the present invention can accurately analyze the melting effect of raw materials and better prove the accuracy of the results of Example 1, a comparison is made using the commonly used and relatively complex melting sample experiment. In the melting sample experiment, the batch melting experiment is carried out according to the quartz sand of three manufacturers, and then the glass bubbles and transparency after melting, cooling and annealing are compared. The specific implementation steps are as follows:

[0068] Quartz sand is mixed according to the production material formula, and the rest of the raw materials are used in the production line, and then melted into glass liquid in a high-temperature furnace. Specific material ratio:

[0069] Components SiO2 Al2O3 CaO MgO SrO B2O3 content / % 63.0 16.0 6.5 2.0 3.0 9.5

[0070] The high-temperature curve of the molten sample of the high-temperature lifting furnace is set as follows: ① heating from room temperature to 1200℃, which takes 2 hours; ② heating from 1200℃ to 1560℃, which takes 40 minutes; ③ keeping at 1560℃ for 3 hours; ④ heating from 1560℃ to 1650℃, which takes 20 minutes, and keeping at 1650℃ for 2 hours; ⑤ cooling from 1650℃ to 1580℃, which takes 20 minutes.

[0071] When the temperature drops to 1580°C, take out the precious metal crucible containing the molten glass and pour the molten glass onto the mold while it is still hot; when the molten glass cools down to a glass body, take it out and observe whether there are any unmelted materials and bubbles inside the glass body, and obtain the test data shown in Table 2.

[0072] Table 2 Test data

[0073]

[0074] By comparing the data in Table 2, it is found that the number of bubbles and transparency of manufacturer A are significantly better than those of manufacturers B and C, indicating that under the same conditions, the quartz sand of manufacturer A is easier to melt, has better diffusivity and a smaller collapse range at the same temperature, which confirms the data test results in Table 1 in Example 1.

[0075] Example 2

[0076] In this embodiment, the raw material of the experiment object is alumina for slump detection and verification. Alumina from manufacturers D, E, and F are selected for slump tests respectively. The detection device and detection method provided by the present invention are used to specifically:

[0077] The melting point of alumina is determined to be 2054°C, and the heating curve of the high-temperature lifting furnace is set with an upper limit temperature of 1650°C. The high-temperature resistance furnace is set to heat up to 730°C and keep warm for standby use.

[0078] The program setting of the high temperature lifting furnace heating curve is as follows: 1) It takes 3 hours to heat from room temperature to 1000℃, and keep it at 1000℃ for 1 hour; 2) It takes 10 minutes to heat from 1000℃ to 1100℃, and keep it at 1100℃ for 1 hour; 3) It takes 10 minutes to heat from 1100℃ to 1200℃, and keep it at 1200℃ for 1 hour; 4) It takes 10 minutes to heat from 1200℃ to 1300℃, and keep it at 1300℃ Keep warm for 1 hour; 5) Raise the temperature from 300℃ to 1400℃ for 10 minutes, and keep warm at 1400℃ for 1 hour; 6) Raise the temperature from 1400℃ to 1500℃ for 10 minutes, and keep warm at 1500℃ for 1 hour; 7) Raise the temperature from 1500℃ to 1600℃ for 10 minutes, and keep warm at 1600℃ for 1 hour; 8) Raise the temperature from 1600℃ to 1650℃ for 5 minutes, and keep warm at 1650℃ for 1 hour.

[0079] Open the loading container 2 of the loading unit, load the alumina to be tested, fill the loading container 2 completely, close the buckle handle 1, close the loading container 2 completely, and put it into the high-temperature lifting furnace with the temperature rising program set for high-temperature melting.

[0080] After the programmed temperature rise is completed, the loading container 2 containing the alumina is taken out and placed in a high-temperature resistance furnace which has been kept at 730° C. for stress relief and heat preservation for 1 hour.

[0081] After the cold zone is removed, the loading container 2 is placed at the center of the crosshairs of the stainless steel evaluation plate 5, and the loading container 2 is hinged open to expose the molten and sintered raw materials inside.

[0082] Observe the collapse edge range of the raw materials and determine the melting effect of the experimental raw materials.

[0083] Refer to the above steps, gradually complete all the samples to be tested, and record the slump grade. The specific slump grade of alumina corresponding to the manufacturer is shown in Table 3.

[0084] Table 3 Slump grade of alumina corresponding to the manufacturer

[0085] factory D Manufacturer E Manufacturer FManufacturer Slump grade Level 3 Level 4 Level 4

[0086] Comparative Example 2

[0087] In order to verify that the detection device and detection method of the present invention can accurately analyze the melting effect of raw materials and better prove the accuracy of the results of Example 2, a comparison is made using the commonly used and relatively complex melting sample experiment. In the melting sample experiment, the batch melting experiment is carried out according to the aluminum oxide of three manufacturers, and then the glass bubbles and transparency after melting, cooling and annealing are compared. The specific implementation steps are as follows:

[0088] Alumina is mixed according to the production material formula, and the rest of the raw materials are used in the production line, and then melted into glass liquid in a high-temperature furnace. Specific material ratio:

[0089] Components SiO2 Al2O3 CaO MgO SrO B2O3 content / % 63.0 16.0 6.5 2.0 3.0 9.5

[0090] The high-temperature curve of the molten sample of the high-temperature lifting furnace is set as follows: ① heating from room temperature to 1200℃, which takes 2 hours; ② heating from 1200℃ to 1560℃, which takes 40 minutes; ③ keeping at 1560℃ for 3 hours; ④ heating from 1560℃ to 1650℃, which takes 20 minutes, and keeping at 1650℃ for 2 hours; ⑤ cooling from 1650℃ to 1580℃, which takes 20 minutes.

[0091] When the temperature drops to 1580°C, take out the precious metal crucible containing the molten glass and pour the molten glass onto the mold while it is still hot; when the molten glass cools down to a glass body, take it out and observe whether there are any unmelted materials and bubbles inside the glass body, and obtain the test data shown in Table 4.

[0092] Table 4 Test data

[0093]

[0094] By comparing the data in Table 4, it is found that the number of bubbles and transparency of manufacturer D are significantly better than those of manufacturers E and F, indicating that under the same conditions, the alumina of manufacturer D is easier to melt, has better diffusivity and a smaller slump range at the same temperature, which confirms the data detection results in Table 3 in Example 2.

[0095] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A method for detecting the slump of raw materials for glass substrates, characterized in that: The following steps are involved: S1. The raw materials are subjected to high-temperature pre-melting treatment, the melting point range of the raw materials of the experimental object is determined, and the high-temperature pre-melting treatment is performed according to the temperature rise curve of the set high-temperature lifting furnace. During the high-temperature pre-melting treatment, the raw materials are loaded through the carrying unit. After the high-temperature pre-melting treatment, the raw materials are naturally cooled and taken out of the high-temperature lifting furnace; S2. The raw materials after high-temperature melting are subjected to annealing and heat preservation treatment. The bearing unit loaded with the raw materials is placed in a resistance furnace for annealing and heat preservation treatment to eliminate the stress effect of the raw materials during the high-temperature melting process and prevent overcooling and cracking; S3. Perform slump analysis on the raw materials after annealing and heat preservation hardening. Place the supporting unit loaded with the raw materials on the detection unit, and peel off the raw materials and the supporting unit to perform slump analysis on the molten and sintered raw materials on the detection unit to determine the melting effect of the experimental raw materials.

2. The method for detecting the slump of raw materials for glass substrates according to claim 1, characterized in that: The specific heating strategy steps for performing high temperature pre-melting treatment according to the heating curve of the high temperature lifting furnace in step S1 are as follows: 1) The high-temperature lifting furnace heats the raw materials of the experimental object from room temperature to 1000°C for 3 hours and keeps them at 1000°C for 1 hour; 2) Raise the temperature from 1000°C to 1100°C for 10 minutes and keep at 1100°C for 1 hour; 3) Raise the temperature from 1100°C to 1200°C for 10 minutes and keep at 1200°C for 1 hour; 4) Raise the temperature from 1200°C to 1300°C for 10 minutes and keep at 1300°C for 1 hour; 5) Raise the temperature from 1300°C to 1400°C for 10 minutes and keep at 1400°C for 1 hour; 6) Raise the temperature from 1400°C to 1500°C for 10 minutes and keep at 1500°C for 1 hour; 7) Raise the temperature from 1500°C to 1600°C for 10 minutes and keep at 1600°C for 1 hour; 8) Raise the temperature from 1600°C to 1650°C in 5 minutes and keep at 1650°C for 1 hour.

3. The method for detecting the slump of raw materials for glass substrates according to claim 2, characterized in that: The specific heating strategy steps 1) to 8) have a heating frequency of 10°C / min for the high temperature lifting furnace.

4. The method for detecting the slump of a raw material for a glass substrate according to claim 1, wherein: When the raw materials are loaded through the carrying unit in step S1, the raw materials are filled into the loading container (2) included in the carrying unit. The loading container (2) is a cylindrical structure formed by two half-open shells hinged by a buckle-type opener (4).

5. The method for detecting the slump of a raw material for a glass substrate according to claim 1, wherein: In step S2, the insulation temperature for annealing and heat preservation treatment in the resistance furnace is 730°C±20°C, and the insulation treatment time is 1 hour.

6. The method for detecting the slump of a raw material for a glass substrate according to claim 4, wherein: When the carrying unit loaded with the raw materials is placed on the detection unit in step S3, the detection unit comprises a circular stainless steel evaluation plate (5), the loading container (2) is placed on the stainless steel evaluation plate (5), the loading container (2) is hingedly opened to allow the raw materials to be peeled off and exposed at the center of the stainless steel evaluation plate (5), and the slump analysis is performed through the slump grading area on the stainless steel evaluation plate (5) to determine the melting effect of the experimental raw materials.

7. The method for detecting the slump of a raw material for a glass substrate according to claim 6, wherein: The center of the stainless steel evaluation plate (5) is set as a bearing unit placement area (51), and a 2nd level slump area (52), a 3rd level slump area (53) and a 4th level slump area (54) are radiated outward in increasing radius from the bearing unit placement area (51).

8. A slump detection device for raw materials for glass substrates, characterized in that: The invention comprises a load-bearing unit and a detection unit, wherein the load-bearing unit comprises a loading container (2) for filling the raw materials of the experimental object, and the loading container (2) is a cylindrical structure formed by two half-open shells hinged by a buckle-type opener and closeer (4); the detection unit comprises a stainless steel evaluation plate (5), the center of the stainless steel evaluation plate (5) is set as a load-bearing unit placement area (51), and a 2nd level slump area (52), a 3rd level slump area (53) and a 4th level slump area (54) are radiated outward in increasing radius from the load-bearing unit placement area (51); When the loading container (2) places the raw materials after high-temperature melting and annealing and heat-insulating hardening on the stainless steel evaluation plate (5), the loading container (2) peels off the raw materials to expose them at the center of the stainless steel evaluation plate (5), and the stainless steel evaluation plate (5) analyzes the raw materials according to the slump of the raw materials in the second slump area (52) or the third slump area (53) or the fourth slump area (54), so as to determine the melting effect of the experimental raw materials.

9. The slump detection device for a raw material for a glass substrate according to claim 8, characterized in that: The loading container (2) is provided with a snap handle (1) for opening or closing the two half-open shells.

10. The slump detection device for a raw material for a glass substrate according to claim 8, characterized in that: A container split center line (3) is arranged at the bottom of the loading container (2), and a cross scale positioning line (55) is arranged passing through the center position of the stainless steel evaluation plate (5).

Images