Zirconia-zircon composite material, its preparation method and application

Abstract

The present invention discloses a zirconia-zircon composite material, its preparation method and application, relating to the technical field of refractory materials. The technical solution is as follows: It includes raw materials with the following mass percentages. Taking the total mass of the remaining raw materials except the organic binder as 100%, the organic binder is calculated as a percentage of the total mass of the remaining raw materials: zircon powder 82-88%, desilicated zircon powder 8-14%, zirconium pyrophosphate 1-6%, titanium dioxide 0.5-1%, organic binder 1.5-4.5%; in the desilicated zircon powder, ZrO2 > 98wt.%, and the purity of zirconium pyrophosphate > 99wt.%. The apparent porosity of the zirconia-zircon composite material of the present invention is < 14%, the bulk density is ≥ 4.05g / cm 3 , the cold compressive strength is 210-385MPa, and the compression creep rate at 1300°C and 0.5MPa for 50h is less than -0.01%. It has good workability and can be used for the support components of overflow bricks for liquid crystal glass.

Description

Technical Field

[0001] The invention relates to the technical field of refractory materials, and in particular to a zirconium oxide-zircon composite material and a preparation method and application thereof. Background Art

[0002] Overflow bricks are key functional materials in the liquid crystal glass manufacturing system. Their support structure is mainly used to bear the weight of the overflow bricks, prevent them from deformation or collapse due to their own weight and external forces, and ensure the stability of the overflow bricks in the working state. At present, the support structure is divided into two parts, namely, a rigid overflow brick support frame and a flexible overflow brick support device. The rigid overflow brick support frame is mostly made of imported heat-resistant steel. The flexible overflow brick support device can be placed at the far and near ends of the overflow brick to support the overflow brick and fit with the lower surface of the far and near ends of the overflow brick. The fitting surface of the flexible overflow brick support device is processed into a wire groove by groove engraving. A heating wire is provided in the wire groove, which can heat the two ends of the overflow brick to avoid crystallization at the far and near ends. This requires the flexible overflow brick support device to have the characteristics of easy processing, high temperature resistance, and not easy to deform.

[0003] Chinese invention patent CN118684491A discloses a method for preparing low expansion and high thermal shock zirconium oxide products, which uses fused high-purity zirconium oxide particles with a particle size of 0-3mm as aggregate, adds MgO as a stabilizer, uses high-purity monoclinic zirconium oxide fine powder with a particle size of less than 45μm, zircon fine powder and high-purity zirconium oxide micropowder with a particle size of less than 2μm as a matrix, uses magnesium oxide, basic magnesium carbonate or magnesium hydroxide with a particle size of less than 45μm as an additive, uses water-based resin, phenolic resin or polyvinyl alcohol solution as a binder, and after mixing, molding and drying, it is fired at a temperature of 1650-1750℃. This patent adds large-particle aggregates, has low compressive strength, and has particles peeling off during grooving. In addition, the fired high-zirconium bricks are conductive at high temperatures and cannot be used to install heating wires.

[0004] Chinese invention patent CN108727019A discloses zircon bricks and their preparation method. The raw materials include 40-60% by mass of dense zircon clinker and 40-60% by mass of matrix material. The matrix material includes the following raw materials by mass: 75-88% zircon sand, 10-20% zirconium dioxide, 1-3% titanium dioxide, 0.5-2% stabilizer, 0.1-0.8% binder; 150-250MPa cold isostatic pressing is adopted, and sintering is carried out at 1500-1630℃ for 6-20h. The products are suitable for contacting glass parts with high thermal stress or high glass quality requirements in alkali-free glass fiber melting furnaces. The patent also adds large aggregate particles, low compressive strength, and particles are easy to peel off during grooving.

[0005] Chinese invention patent CN116986897A discloses sintered high-zirconium bricks and their preparation method, including the following raw materials in weight percentage: ZrO2 76-88wt.%; ZA eutectic 5-10wt.%; Y2O3 2-8wt.%; MgO 2-6wt.%; CaO 2-4wt.%; CeO2 0.4-1.2wt.%; SrO 0.3-1wt.%. This patent is suitable for the liquid level position of the glass melting pool, with low porosity, high volume density, and good thermal shock resistance, but the main matrix is ​​ZrO2 or yttrium-stabilized zirconium, which has high strength and can conduct electricity at high temperatures, and cannot be used for groove installation of heating wires.

[0006] The paper "Study on the Processing Mechanism of CePO4 / Ce-ZrO2 Machinable Ceramics" in Journal of the Chinese Ceramic Society Vol.31No.4 compared the indentation crack propagation morphology of materials before and after the addition of CePO4 and analyzed the grinding and cutting processes. It was found that the fracture form of the larger CePO4 particles in CePO4 / Ce-ZrO2 is micro-lamellar fracture; the weak bonding interface between CePO4 and ZrO2 particles forms discontinuous cracking. The existence of these two mechanisms causes a large number of thousands of micro-cracks to form during material processing or before destruction to disperse the energy of crack propagation. The final removal of the material during processing is achieved by connecting these micro-cracks, making the material machinable while reducing processing damage. Nanomaterials 12Ce-ZrO2 (average particle size 0.06μm) and CePO4 (average particle size 0.04μm) were used as raw materials, and the mass fractions (the same below) were 0, 15%, 25%, and 50%. After ball milling, drying, dry pressing, and isostatic pressing (200MPa), the test pieces were sintered at 1550℃ in a silicon-molybdenum rod electric kiln for 24 hours, and achieved good mechanical processing properties. However, the melting point of CePO4 is only 1255℃, so it cannot be used for high-temperature support structures.

[0007] In view of the shortcomings of the existing technology, it is necessary to provide a new flexible overflow brick support device to solve the problems of existing materials being high in hardness, high in brittleness, low in processing efficiency, easy to cause waste due to missing corners and edges, and high in compressive creep rate affecting service life. Summary of the invention

[0008] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a zirconium oxide-zircon composite material and a preparation method and application thereof, which has an apparent porosity of less than 14% and a bulk density of ≥4.05g / cm 3 The room temperature compressive strength is in the range of 210-385MPa, the compressive creep rate at 1300℃ and 0.5MPa for 50h is less than -0.01%, and it has good processability and can be used as the supporting parts of liquid crystal glass overflow bricks.

[0009] The technical solution of the present invention is:

[0010] In a first aspect, the present invention provides a zirconia-zircon quartz composite material, comprising raw materials in the following mass percentages, wherein the total mass of the raw materials other than the organic binder is counted as 100%, and the organic binder is counted as a percentage of the total mass of the other raw materials: zircon quartz powder 82-88%, desilicated zircon powder 8-14%, zirconium pyrophosphate 1-6%, titanium dioxide 0.5-1%, organic binder 1.5-4.5%; in the desilicated zircon powder, ZrO2 > 98 wt.%, and the purity of zirconium pyrophosphate > 99 wt.%.

[0011] Preferably, in the zircon quartz powder, ZrO2 > 65 wt.%, SiO2 < 34 wt.%, Al2O3 < 0.2 wt.%, Fe2O3 < 0.1 wt.%, and the particle size < 320 mesh.

[0012] Preferably, the particle size of the desilicated zircon powder < 320 mesh.

[0013] Preferably, the median diameter D of the zirconium pyrophosphate 50 < 5 μm.

[0014] Preferably, in the titanium dioxide, TiO2 > 98.5 wt.%, and the particle size < 320 mesh.

[0015] Preferably, the organic binder is a composition of phenolic resin, carboxymethyl cellulose and polyvinyl alcohol with a mass ratio of 1:1:1.

[0016] In a second aspect, the present invention provides a preparation method of the above zirconia-zircon quartz composite material, comprising the following steps:

[0017] S1 Wet ball milling: Add the organic binder into the ball milling equipment, add water for pre-grinding; then add the zircon quartz powder, desilicated zircon powder, zirconium pyrophosphate, and titanium dioxide into the ball milling equipment for grinding to obtain a slurry;

[0018] S2 Granulation: Spray granulate the slurry, sieve the obtained granulated powder;

[0019] S3 Molding: Load the granulated powder into a mold, perform isostatic pressing to obtain a green body;

[0020] S4 Sintering: Sinter the green body at 1500-1600 °C for 12-36 h, with a heating rate of 3-6 °C / h; when the temperature is cooled to 1000 °C after sintering, the cooling rate is 3-4 °C / h, and continue to cool, with a cooling rate of 5-7 °C / h, then the zirconia-zircon quartz composite material is obtained.

[0021] Preferably, in step S1, the median diameter D of the slurry 50 = 3-6 μm.

[0022] Preferably, in step S3, the isostatic pressing pressure is 120 - 200 MPa.

[0023] In a third aspect, the present invention provides the application of the above zirconia-zirconolite composite material. The zirconia-zirconolite composite material is processed into an overflow brick support brick by grooving: using a cutting and grinding tool to process the zirconia-zirconolite composite material into a cube, and then processing a number of parallel grooves on four side faces of the cube to obtain the overflow brick support brick.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The zirconia-zirconolite composite material of the present invention has the characteristics of apparent porosity < 14%, bulk density ≥ 4.05 g / cm 3 , cold compressive strength in the range of 210 - 385 MPa, and the compressive creep rate at 1300 °C and 0.5 MPa for 50 h is less than -0.01%, and has good machinability, and can be used for the support components of liquid crystal glass overflow bricks.

[0026] 2. Compared with the existing zirconolite products, the zirconia-zirconolite composite material of the present invention will not show the phenomenon of edge chipping during grooving processing, and the qualified rate of the grooving processing of the product reaches 100%. The preparation method of the present invention is simple, feasible, scientific and reasonable, and is convenient for large-scale industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of an overflow brick support brick with edge chipping phenomenon in the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0028] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0029] In the following examples and comparative examples, the zirconolite powder used includes the following components by mass percentage: 0.15 wt.% of Al2O3, 0.06 wt.% of Fe2O3, 32.95 wt.% of SiO2, 66.2 wt.% of ZrO2, and the rest are trace impurities such as K2O, Na2O, CaO, and MgO; the particle size of the zirconolite powder < 320 mesh. The desiliconized zircon powder used includes the following components by mass percentage: 0.25 wt.% of Al2O3, 0.3 wt.% of SiO2, 99.25 wt.% of ZrO2, and the rest are trace impurities such as TiO2, CaO, and MgO; the particle size of the desiliconized zircon powder < 320 mesh. The purity of the zirconium pyrophosphate powder used is 99.4 wt.%, in which the ZrO2 content is 50.3 wt.%, the P2O5 content is about 49.1 wt.%, and there are basically no other impurity components, and the median diameter D of the powder50 = 4 μm. In the titanium dioxide used as the sintering promoter, the TiO₂ content is 99.1 wt.%, the particle size is < 320 mesh, and the crystal form is rutile. The yttrium-stabilized zirconia used includes the following components by mass percentage: 5.3 wt.% of Y₂O₃, 0.2 wt.% of Al₂O₃, 0.06 wt.% of Fe₂O₃, 94.4 wt.% of ZrO₂, and the rest are trace impurities such as K₂O, Na₂O, CaO, and MgO; the particle size is < 320 mesh.

[0030] The preparation method of the zirconia-zirconolite composite material in the following examples includes the following steps:

[0031] S1 Wet ball milling: Weigh the organic binder and add it to the ball milling equipment, add water and pre-grind for 5 min; then weigh and add zirconolite powder, desilicated zircon powder, zirconium pyrophosphate, and titanium dioxide to the ball milling equipment for grinding to obtain slurry.

[0032] S2 Granulation: Spray granulate the slurry to obtain granulated powder with uniform components and particles, and use it after passing through a 100-mesh sieve.

[0033] S3 Molding: Load the granulated powder into a mold, seal and evacuate the mold, and then put it into a cold isostatic pressing equipment to obtain a green body.

[0034] S4 Sintering: Put the green body into a kiln and sinter at 1500 - 1600 °C for 12 - 36 h, with a heating rate of 3 - 6 °C / h; when the temperature is cooled to 1000 °C after sintering, the cooling rate is 3 - 4 °C / h, and continue to cool, with a cooling rate of 5 - 7 °C / h, then the zirconia-zirconolite composite material is obtained.

[0035] The prepared zirconia-zirconolite composite material is processed into an overflow brick support brick by grooving: Use a cutting and grinding tool to process the zirconia-zirconolite composite material into a cube of 200 mm × 200 mm × 200 mm, and then use a CNC machining center to process a number of grooves with a parallel interval of 4 mm on four sides of the cube. When grooving, use a diamond saw blade with a diameter of 150 mm and a thickness of 3 mm, control the rotation speed of the diamond saw blade at 1000 r / min, and control the feeding speed of the cube at 0.35 m / s; use water as the grinding fluid to cool the diamond saw blade, and fix the grinding depth at 8 mm, then the overflow brick support brick is obtained.

[0036] The formulations and process parameters of the zirconia-zirconolite composite materials in Examples 1 - 9 and Comparative Examples 1 - 10 are shown in Tables 1 - 3:

[0037] Table 1 Formulations and process parameters of the zirconia-zirconolite composite materials in Examples 1 - 9

[0038]

[0039] Table 2 Formulations and Process Parameters of Zirconia-Zircon Composite Materials for Comparative Examples 1-5

[0040]

[0041] Table 3 Formulations and Process Parameters of Zirconia-Zircon Composite Materials for Comparative Examples 6-10

[0042]

[0043] Perform performance tests on the overflow brick support bricks processed from Examples 1-9 and Comparative Examples 1-10. Among them, the apparent porosity and bulk density are tested according to "GB / T 2997-2015 Test Methods for Bulk Density, Apparent Porosity and True Porosity of Dense Shaped Refractory Products"; the cold crushing strength is tested according to "GB / T 5072-2023 Refractory Materials - Test Method for Cold Crushing Strength at Ambient Temperature"; the compressive creep rate is tested according to "GB / T 5073-2005 Refractory Materials - Compressive Creep Test Method". Among them, if the detected value is negative, it indicates that the product shows an expansion direction during the detection process; if the detected value is positive, it indicates that the product shows a compression direction during the detection process; Machinability test: Process 28 grooves on one side of each overflow brick support brick. If there is a chamfering defect as shown in Figure 1 the figure, when the chamfering size a + b < 3 mm, the number is not counted; when 3 mm ≤ a + b ≤ 8 mm and the number of chamfering does not exceed 2, the overflow brick support brick is judged to be qualified. The test results are shown in Tables 4-6:

[0044] Table 4 Performance Test Results of Overflow Brick Support Bricks Processed from Examples 1-9

[0045]

[0046] Table 5 Performance Test Results of Overflow Brick Support Bricks Processed from Comparative Examples 1-5

[0047]

[0048] Table 6 Performance Test Results of Overflow Brick Support Bricks Processed from Comparative Examples 6-10

[0049]

[0050] As can be seen from Table 4, for the overflow brick support bricks processed from Examples 1-9 using zirconia-zircon composite materials, the apparent porosity is 11.4 - 13.6%, and the bulk density is 4.05 - 4.2 g / cm 3, the normal temperature compressive strength is stably within the range of 210 - 285 MPa; the 50-hour compressive creep rate at 1300 °C and 0.5 MPa is below -0.008%, which is significantly reduced compared with Comparative Examples 1 - 5. Moreover, after processing, there is no edge defect with a + b ≥ 3 mm, and the products meet the qualified requirements at one time after processing, without any defective products.

[0051] Comparing Example 1 and Comparative Example 1, Comparative Example 1 does not add desiliconized zircon powder, and the apparent porosity of the overflow brick support brick processed is 0.2%, and the bulk density is 4.41 g / cm 3 , and the normal temperature compressive strength reaches 463 MPa. The high strength of the overflow brick support brick results in 3 edge defects with a + b > 3 mm after processing, so it is determined as a defective product. Although the overflow brick support brick in Comparative Example 1 has a high density, the compressive creep rate is -0.016%, indicating that adding zirconium pyrophosphate alone has a certain effect on reducing the compressive creep rate. However, for the zirconia-zirconolite composite material prepared without adding desiliconized zircon powder, it has a high density and high hardness at normal temperature, making it difficult to process.

[0052] Comparing Example 1 and Comparative Example 2, too little desiliconized zircon powder is added in Comparative Example 2, resulting in the apparent porosity of the overflow brick support brick processed reaching 1.3%, and the bulk density is 4.37 g / cm 3 , and the normal temperature compressive strength reaches 396 MPa. The high strength results in 2 edge defects with a + b > 3 mm after processing. Although the overflow brick support brick in Comparative Example 2 has a relatively high density, the compressive creep rate is -0.02%, indicating that when the addition amount of desiliconized zircon powder is too small, its role in reducing the compressive creep rate and improving the processing performance is very limited, and it still has the problem of being difficult to process due to high density and high hardness.

[0053] Comparing Example 1 and Comparative Example 3, too much desiliconized zircon powder is added in Comparative Example 3, resulting in the apparent porosity of the overflow brick support brick processed reaching 18.5%, and the bulk density is 3.76 g / cm 3 , and the normal temperature compressive strength reaches 355 MPa. The high strength results in 3 edge defects with a + b > 3 mm after processing, and the compressive creep rate is -0.022%. It shows that too much desiliconized zircon powder reduces the density of the product, but the problems of high hardness and brittleness brought by the chemical properties of ZrO2 itself are only limitedly improved; at the same time, the role of the added zirconium pyrophosphate in reducing the compressive creep rate is also very limited.

[0054] Comparing Example 3 and Comparative Example 4, zirconium pyrophosphate is not added in Comparative Example 4, resulting in the apparent porosity of the overflow brick support brick processed reaching 16%, and the bulk density is 4.11 g / cm 3 , and the normal temperature compressive strength reaches 420 MPa. The high strength and the compressive creep rate is -0.034%. It shows that when only desiliconized zircon powder is added without adding zirconium pyrophosphate, the obtained products still have problems such as high hardness, brittleness, poor processing performance, and a relatively high compressive creep rate.

[0055] Comparing Example 3 with Comparative Example 5, the amount of zirconium pyrophosphate added in Comparative Example 5 is too little, resulting in the apparent porosity of the processed overflow brick supporting brick reaching 15.6% and the bulk density being 4.09 g / cm 3 The room temperature compressive strength reaches 394MPa, with high strength and a compressive creep rate of -0.03%. This shows that when the amount of zirconium pyrophosphate added is too small, it has a limited effect on improving the processing performance of overflow bricks and supporting bricks, and has a small effect on improving the compressive creep rate.

[0056] Comparing Example 3 with Comparative Example 6, in Comparative Example 6, excessive zirconium pyrophosphate was added, resulting in the processed overflow brick supporting brick having an apparent porosity of 15.2% and a bulk density of 4.07 g / cm 3 The compressive strength at room temperature is only 160MPa, which is relatively low. The overflow bricks and supporting bricks after processing have no defects, but the compressive creep rate is relatively high. It is speculated that excessive zirconium pyrophosphate will cause excessive crystal growth during high-temperature sintering, resulting in easy lamellar fracture. Excessive zirconium pyrophosphate can improve processing performance, but it is not good for the compressive creep rate.

[0057] Comparing Example 8 with Comparative Example 7, the zircon powder added in Comparative Example 7 is too little, resulting in the processed overflow brick support brick having an apparent porosity of 15.4% and a bulk density of 4.03 g / cm 3 The room temperature compressive strength is only 178MPa, the compressive creep rate is -0.028%, the strength is low, and the overflow brick support brick after processing has no defects. This shows that adding too little zircon powder will reduce the volume density and compressive strength, because the problems of high hardness and brittleness caused by the characteristics of ZrO2 itself are reduced by reducing the amount of zircon powder added. At the same time, under the joint action of zirconium pyrophosphate, the product has good machinability, but it has little effect on improving the compressive creep rate.

[0058] Comparing Example 9 with Comparative Example 8, the addition of excessive zircon powder in Comparative Example 8 resulted in the processed overflow brick supporting brick having an apparent porosity of only 1.6% and a bulk density of 4.33 g / cm 3 The room temperature compressive strength is as high as 440MPa, which is too high. After processing, there are 3 edges with a+b>3mm, and the compressive creep rate is -0.024%. This shows that although zirconium pyrophosphate is added to Comparative Example 8, excessive addition of zircon powder will increase the room temperature compressive strength and affect the processing performance and compressive creep rate of the overflow brick support brick.

[0059] Comparing Example 1 with Comparative Example 9, in Comparative Example 9, yttrium-stabilized zirconia was used instead of desiliconized zirconium powder. The apparent porosity of the processed overflow brick support brick was 12.3%, and the volume density reached 4.15 g / cm 3, the room temperature compressive strength is as high as 355 MPa. After processing, there are 2 edges with a + b > 3 mm missing, and the compressive creep rate is -0.01%. It shows that using yttrium-stabilized zirconia instead of desilicated zircon powder, Y2O3 in it can stabilize the phase transformation of ZrO2 as a solid solution, inhibit its polymorphic transformation during heating and cooling, enable the product to obtain good apparent porosity and bulk density, improve the strength and stability of the product, and the compressive creep rate of the product is good, but it will deteriorate the processing performance of the product.

[0060] Comparing Example 2 and Comparative Example 10, Comparative Example 10 uses yttrium-stabilized zirconia instead of zirconium pyrophosphate. The apparent porosity of the overflow brick support brick processed is 14.1%, and the bulk density reaches 4.1 g / cm 3 , the room temperature compressive strength is as high as 350 MPa. After processing, there are 2 edges with a + b > 3 mm missing, and the compressive creep rate is -0.013%. It shows that Comparative Example 10 uses yttrium-stabilized zirconia instead of zirconium pyrophosphate. Y2O3 in it can stabilize the phase transformation of ZrO2 as a stabilizer, can improve the strength of the product, and the compressive creep rate is good, but the increase in strength increases the processing difficulty of the product and increases the processing defects of the product.

Claims

1. A zirconium oxide-zircon composite material, characterized in that: The invention comprises the following raw materials in percentage by mass, wherein the total mass of the raw materials other than the organic binder is taken as 100%, and the organic binder is taken as the percentage of the total mass of the remaining raw materials: zircon powder 82-88%, desiliconized zirconium powder 8-14%, zirconium pyrophosphate 1-6%, titanium dioxide 0.5-1%, and organic binder 1.5-4.5%; ZrO2 in the desiliconized zirconium powder is greater than 98wt.%, and the purity of zirconium pyrophosphate is greater than 99wt.%.

2. The zirconium oxide-zircon composite material according to claim 1, characterized in that: In the zircon powder, ZrO2>65wt.%, SiO2<34wt.%, Al2O3<0.2wt.%, Fe2O3<0.1wt.%, and particle size<320 mesh.

3. The zirconium oxide-zircon composite material according to claim 1, characterized in that: The particle size of the desiliconized zirconium powder is less than 320 meshes.

4. The zirconium oxide-zircon composite material according to claim 1, characterized in that: The median diameter D of the zirconium pyrophosphate 50 <5μm.

5. The zirconium oxide-zircon composite material according to claim 1, characterized in that: In the titanium dioxide, TiO2>98.5wt.%, and particle size<320 mesh.

6. The zirconium oxide-zircon composite material according to claim 1, characterized in that: The organic binder is a composition of phenolic resin, carboxymethyl cellulose and polyvinyl alcohol in a mass ratio of 1:1:

1.

7. The method for preparing the zirconium oxide-zircon composite material according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1 wet ball milling: add an organic binder into a ball mill and add water for pre-grinding; then add zircon powder, desiliconized zirconium powder, zirconium pyrophosphate and titanium dioxide into the ball mill for grinding to obtain slurry; S2 granulation: spray granulate the slurry, and sieve the granulated powder; S3 molding: the granulated powder is loaded into a mold and isostatically pressed to obtain a green body; S4 sintering: sinter the green body at 1500-1600°C for 12-36h, with a heating rate of 3-6°C / h; after sintering, cool to 1000°C at a cooling rate of 3-4°C / h, and continue cooling at a cooling rate of 5-7°C / h to obtain a zirconium oxide-zircon composite material.

8. The method for preparing the zirconium oxide-zircon composite material according to claim 7, characterized in that: In step S1, the median diameter D of the mud 50 =3-6μm.

9. The method for preparing the zirconium oxide-zircon composite material according to claim 7, characterized in that: In step S3, the isostatic pressing pressure is 120-200 MPa.

10. Use of the zirconium oxide-zircon composite material according to any one of claims 1 to 6, characterized in that: The zirconia-zircon composite material is processed into an overflow brick support brick by grooving: the zirconia-zircon composite material is processed into a cube using a cutting and grinding tool, and then a plurality of parallel grooves are respectively processed on the four sides of the cube to obtain an overflow brick support brick.

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