High-temperature-resistant and impact-resistant heat-absorbing and heat-preserving composite ceramic tile, and preparation method and application thereof

Abstract

The application discloses a kind of high-temperature-resistant impact-resistant heat-absorbing heat-insulating composite ceramic brick and its preparation method and application, the ceramic composite brick includes heat-insulating layer and heat-absorbing layer;The main component of the heat-insulating layer is vacuum nanometer heat-insulating ceramic particles and alloy metal particles containing one or more of tungsten, cobalt, molybdenum or vanadium elements;The main component of the heat-absorbing layer is 3N grade and above high-purity alumina and black pigment;The components of the heat-insulating layer and the heat-absorbing layer are filled in the same mold in sections, and then are pressed to form a composite.The heat-insulating layer not only has excellent heat-insulating performance, but also has good toughness and impact resistance;The heat-absorbing layer can quickly absorb heat and accumulate heat, the temperature rising speed in the furnace is increased by more than 30%, the set temperature is quickly reached, the heat-insulating performance is increased by more than 2 times, and has good practical value and important energy-saving and environmental protection social value.

Description

Technical Field

[0001] This invention relates to a high-temperature resistant, impact-resistant, heat-absorbing and heat-insulating composite ceramic brick, its preparation method, and its application. Background Technology

[0002] High-temperature furnaces, also known as muffle furnaces, are commonly used heating equipment, primarily applied in metallurgy, heat treatment, materials science, and chemical engineering. In industrial applications, high-temperature furnaces are used for the heat treatment of alloy steel products and metal parts, such as normalizing, quenching, and annealing. Furthermore, they are also used for the high-temperature sintering of diamond cutting blades, demonstrating a very wide range of applications.

[0003] The internal temperature of high-temperature furnaces can reach over 2000℃. Therefore, the inner liner material needs to possess properties such as high-temperature resistance, corrosion resistance, and chemical erosion resistance to ensure stability and service life under high-temperature environments. Existing inner liner materials for high-temperature furnaces include high-temperature fiber materials, stainless steel, refractory metals, and ceramic materials. Among these, ceramic materials have received widespread attention due to their excellent high-temperature resistance and corrosion resistance. However, the high brittleness of ceramic materials makes them prone to damage during operation, which is one of the biggest obstacles to their application as inner liner materials for high-temperature furnaces.

[0004] Furthermore, a common drawback of existing high-temperature furnaces is that they require a long time to reach the set temperature during operation, and their heat preservation effect is poor, resulting in significant heat leakage and high energy consumption. For example, according to practical statistics, incinerators using radiant heating take approximately 2.6 to 2.8 hours to reach a set temperature of 1600℃, and approximately 2.8 to 3.5 hours to reach a set temperature of 1800℃.

[0005] According to Planck's law of radiation, black objects absorb more heat and will heat up faster or more readily under light radiation, thus improving energy conversion efficiency and heat retention. However, most existing ceramic bricks for high-temperature furnaces are white and cannot retain heat effectively. This is because existing ceramic colorants can only withstand relatively low temperatures, around 1200–1300℃. For example, Chinese patent document CN112143256A discloses a high-temperature resistant black ceramic colorant, its preparation process, and ceramic bricks using it. This high-temperature resistant black ceramic colorant comprises 40–45% iron oxide, 52–56% chromium oxide, 3–5% cobalt oxide, and 1–2% composite mineralizer, which can improve the color development of the high-temperature resistant black ceramic colorant and withstand sintering temperatures of 1220–1260℃. This clearly cannot meet the temperature requirements for use in high-temperature furnaces.

[0006] Therefore, how to quickly reach the preset temperature inside the high-temperature furnace and how to achieve better heat preservation performance during operation are urgent problems to be solved, and they are also of great significance to achieving the goal of energy conservation and environmental protection. Summary of the Invention

[0007] To address the problems of existing high-temperature furnace ceramic liner being brittle and easily broken, taking a long time to reach the set temperature, having poor heat retention during operation, and existing ceramic bricks not being heat-retaining and unsuitable for high-temperature furnace use, this invention provides a high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick, its preparation method, and its application. The ceramic components are improved to withstand high temperatures while enhancing heat retention performance. Simultaneously, a heat-absorbing layer is prepared using a preferred black pigment. The combination of these two components creates a high-temperature resistant ceramic brick suitable for use in high-temperature furnaces, achieving high temperature resistance, impact resistance, rapid heat absorption and heating, and excellent heat retention. The specific technical solution is as follows:

[0008] First, the present invention provides a high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick, comprising an insulation layer and a heat-absorbing layer; the main components of the insulation layer are vacuum nano-insulating ceramic particles and alloy metal particles containing one or more of tungsten, cobalt, molybdenum, or vanadium; the main components of the heat-absorbing layer are high-purity alumina of grade 3N or higher and black pigment; the components of the insulation layer and the heat-absorbing layer are filled into the same mold in sections and then pressed to form the high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick.

[0009] The aforementioned high-temperature resistant, impact-resistant, heat-absorbing and heat-insulating ceramic composite bricks are made of one or more of silicon carbide, corundum, alumina, or zirconium oxide.

[0010] Preferably, in the aforementioned high-temperature resistant, impact-resistant, heat-absorbing and heat-insulating ceramic composite brick, the amount of alloy metal particles is 2 to 15% of the weight of the vacuum nano-insulating ceramic particles.

[0011] The aforementioned high-temperature resistant, impact-resistant, heat-absorbing and heat-insulating ceramic composite bricks contain black pigments, which are one or more of manganese iron black, copper chromium black, cobalt black, iron oxide black, and graphite; the amount of black pigment used is 1.5 to 3.5% of the weight of high-purity alumina.

[0012] Preferably, in the aforementioned high-temperature resistant, impact-resistant, heat-absorbing and heat-insulating ceramic composite brick, the black pigment is a mixture of manganese iron black and graphite, with a mixing weight ratio of 2:1; the amount of black pigment used is 2% of the weight of high-purity alumina.

[0013] In the aforementioned high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick, the heat insulation layer and the heat absorption layer are bonded together by a ceramic binder, the amount of which accounts for 10% of the weight of the main components of the heat insulation layer and the heat absorption layer, respectively; the thickness ratio of the heat insulation layer to the heat absorption layer is 1 to 3:1.

[0014] Secondly, this invention provides a method for preparing the aforementioned high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick, comprising the following steps:

[0015] 1) Preparation of insulation layer materials

[0016] Vacuum nano-insulating ceramic particles are mixed evenly with alloy metal particles containing one or more of tungsten, cobalt, molybdenum or vanadium, and a ceramic binder is added. The mixture is then mixed evenly and used as insulation material for later use.

[0017] 2) Preparation of heat-absorbing layer material

[0018] First, mix high-purity alumina of grade 3N and above with black pigment evenly, then add ceramic binder and mix evenly to make it the heat-absorbing layer material for later use.

[0019] 3) Pressing

[0020] The insulation material is first added into the prefabricated composite brick mold, then the heat-absorbing material is added, and then the mold is pressed to form a ceramic composite brick blank.

[0021] 4) Sintering

[0022] The pressed ceramic composite brick blank is left to stand and solidify. After demolding, a high-temperature resistant, impact-resistant, heat-absorbing and heat-insulating ceramic composite brick is obtained.

[0023] In the aforementioned method for preparing high-temperature resistant, impact-resistant, heat-absorbing and heat-insulating ceramic composite bricks, the pressing pressure in step 3) is greater than 1 ton per square centimeter.

[0024] In the aforementioned method for preparing high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite bricks, the standing time in step 4) is more than 48 hours.

[0025] In addition, the present invention provides an application of the aforementioned high-temperature resistant, impact-resistant, heat-absorbing and heat-insulating ceramic composite brick, which is used to make the inner liner material of a high-temperature furnace, and when in use, its heat-insulating layer faces the furnace wall and its heat-absorbing layer faces the furnace cavity.

[0026] The beneficial effects of this invention are:

[0027] 1) The ceramic composite brick of the present invention has a heat insulation layer and a heat absorption layer. The heat insulation layer is made of vacuum nano-insulating ceramic particles and alloy metal particles containing one or more of tungsten, cobalt, molybdenum or vanadium. It not only has excellent heat insulation performance, but also good toughness and impact resistance. It greatly improves the high brittleness of ceramic materials, solves the problem of easy damage during operation, greatly improves the service life and heat insulation effect of high temperature furnace, avoids heat leakage, and has good energy saving and environmental protection effects.

[0028] 2) The ceramic composite brick of this invention contains a heat-absorbing layer composed of high-purity alumina of grade 3N or higher and black pigment. When in use, the heat-absorbing layer faces the furnace cavity, enabling rapid heat absorption, accelerating energy conversion efficiency, achieving a heat-concentrating effect, and allowing the furnace temperature to quickly reach the set temperature. Tests show that at a set temperature of 1600℃, it takes approximately 1-2 hours to reach the set temperature; at a set temperature of 1800℃, it takes approximately 1.5-2.5 hours, representing a more than 30% increase in heating rate and nearly a doubling of the heat preservation effect.

[0029] 3) The black pigment of the heat-absorbing layer of the present invention is one or more of manganese iron black, copper chromium black, cobalt black, iron oxide black, and graphite. This not only enables it to withstand the high temperature of the high-temperature furnace, but also improves the toughness of the heat-absorbing layer when mixed with high-purity alumina, thereby improving the performance and service life of the high-temperature furnace. Furthermore, the amount of pigment used is controlled to be 1.5 to 3.5% of the weight of high-purity alumina, so that the ceramic composite brick has good heat absorption and heat retention effects while avoiding affecting its mechanical properties at high temperatures. Attached Figure Description

[0030] Figure 1 This is a physical image of the high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick of the present invention. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments and accompanying drawings.

[0032] Example 1

[0033] This embodiment addresses the problems of existing high-temperature furnace ceramic liner being brittle and easily damaged; long time required to reach the set temperature inside the furnace; poor heat preservation during operation; and existing ceramic bricks not concentrating heat and being unsuitable for use in high-temperature furnaces. It proposes a high-temperature resistant, impact-resistant, heat-absorbing and heat-insulating ceramic composite brick, its preparation method, and its application.

[0034] The ceramic composite brick described in this embodiment uses an improved ceramic composition to prepare an insulating layer, which can withstand high temperatures while enhancing its insulation performance. Simultaneously, a heat-absorbing layer is prepared using a preferred black pigment. The insulating and heat-absorbing layers are then combined to create a high-temperature resistant ceramic brick. This brick is suitable for use in high-temperature furnaces, achieving high temperature resistance, impact resistance, rapid heat absorption and heating, and excellent insulation performance. Specifically:

[0035] The high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick described in this embodiment includes an insulation layer and a heat-absorbing layer. The insulation layer is mainly composed of vacuum nano-insulating ceramic particles and alloy metal particles containing one or more of tungsten, cobalt, molybdenum, or vanadium. The heat-absorbing layer is mainly composed of high-purity alumina of grade 3N or higher and black pigment. The components of the insulation layer and the heat-absorbing layer are filled into the same mold in sections and then pressed to form the high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick.

[0036] The vacuum nano-insulating ceramic particles are prepared from one or more of silicon carbide, corundum, alumina, or zirconium oxide; the amount of alloy metal particles is 2-15% of the weight of the vacuum nano-insulating ceramic particles. The black pigment is one or more of manganese iron black, copper chromium black, cobalt black, iron oxide black, and graphite; its amount is 1.5-3.5% of the weight of high-purity alumina. Preferably, the black pigment is a mixture of manganese iron black and graphite, with a mixing weight ratio of 2:1; the amount of black pigment is 2% of the weight of high-purity alumina.

[0037] The high-temperature resistant, impact-resistant, heat-absorbing and heat-insulating ceramic composite brick described in this embodiment is bonded to the heat-insulating layer and the heat-absorbing layer by a ceramic binder. The main component of the ceramic binder is silica sol, and its usage accounts for 10% of the weight of the main component of the heat-insulating layer and the main component of the heat-absorbing layer, respectively.

[0038] In this embodiment, the thickness ratio of the insulation layer to the heat-absorbing layer of the high-temperature resistant, impact-resistant, heat-absorbing and insulating ceramic composite brick is 1 to 3:1.

[0039] The preparation method of the high-temperature resistant, impact-resistant, heat-absorbing and heat-insulating ceramic composite brick described in this embodiment includes the following steps:

[0040] 1) Preparation of insulation layer materials

[0041] Vacuum nano-insulating ceramic particles are uniformly mixed with alloy metal particles containing one or more of tungsten, cobalt, molybdenum, or vanadium, and a ceramic binder is added. The mixture is then thoroughly mixed to create an insulation layer material for later use. The vacuum nano-insulating ceramic particles are commercially available and have a particle size of 20-30 mesh. The alloy metal particles containing one or more of tungsten, cobalt, molybdenum, or vanadium are also commercially available and have a particle size of 320-330 mesh.

[0042] 2) Preparation of heat-absorbing layer material

[0043] First, mix high-purity alumina of grade 3N and above (including purity of 99.9%, 99.99% and 99.999%) with black pigment evenly, then add ceramic binder and mix evenly. This mixture will be used as the heat-absorbing layer material for later use.

[0044] 3) Pressing

[0045] The insulation material is first added to the prefabricated composite brick mold, then the heat-absorbing material is added, and then the mold is pressed to form a ceramic composite brick blank; the pressing pressure is greater than 1 ton per square centimeter.

[0046] 4) Consolidation

[0047] The pressed ceramic composite brick blank is left to stand for more than 48 hours to solidify. After demolding, a high-temperature resistant, impact-resistant, heat-absorbing and heat-insulating ceramic composite brick is obtained.

[0048] When the high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick described in this embodiment is used as the inner liner material of a high-temperature furnace, its heat-insulating layer faces the furnace wall, and its heat-absorbing layer faces the furnace cavity.

[0049] The insulation layer of this ceramic composite brick is made of vacuum nano-insulating ceramic particles and alloy metal particles containing one or more of the elements tungsten, cobalt, molybdenum, or vanadium. It not only possesses excellent insulation performance but also good toughness and impact resistance, significantly improving the high brittleness of ceramic materials and solving the problem of easy damage during operation. This greatly extends the service life and insulation effect of high-temperature furnaces, prevents heat leakage, and has good energy-saving and environmental protection effects. Its heat-absorbing layer is composed of high-purity alumina of 3N grade or higher and black pigment. When in use, the heat-absorbing layer faces the furnace cavity, enabling rapid heat absorption, accelerating energy conversion efficiency, achieving a heat-concentrating effect, and allowing the furnace temperature to quickly reach the set temperature. Tests show that at a set temperature of 1600℃, it takes approximately 1-2 hours to reach the set temperature; at a set temperature of 1800℃, it takes approximately 1.5-2.5 hours, increasing the heating rate by more than 30% and improving the insulation effect by 2 times or more. Furthermore, the black pigment in the heat-absorbing layer is one or more of manganese iron black, copper chromium black, cobalt black, iron oxide black, and graphite. This not only enables it to withstand the high temperatures of the high-temperature furnace, but also, when mixed with high-purity alumina, improves the toughness of the heat-absorbing layer, thereby enhancing the performance and service life of the high-temperature furnace. Moreover, the amount of pigment used is controlled to be 1.5% to 3.5% of the weight of high-purity alumina, which ensures that the ceramic composite brick has good heat absorption and heat retention effects while avoiding affecting its mechanical properties at high temperatures.

[0050] Example 2

[0051] This embodiment describes the preparation of a high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick according to the method of Example 1. Details are as follows:

[0052] Take 50 kg of 25-mesh vacuum nano-insulating ceramic particles made of silicon carbide (purchased from Shandong Jingang New Material Co., Ltd.). Take 5 kg of 325-mesh tungsten and cobalt alloy metal particles (1% tungsten and 0.5% cobalt, purchased from Henan Sicheng Grinding Technology Co., Ltd.). Mix the two evenly, then add the ceramic binder silica sol (purchased from Shandong Kehan ​​Silicon Source New Material Co., Ltd.), and mix evenly again to obtain the insulation layer material for later use.

[0053] Take 30 kg of high-purity alumina with a purity of 99.99% (purchased from Guangzhou Xinxi Metallurgical Chemical Co., Ltd.), add 4 kg of manganese iron black and 2 kg of graphite mixed black pigment (manganese iron black purchased from Foshan Zhengnian New Materials Co., Ltd., graphite purchased from Qingdao Yuanshengrun Graphite New Materials Co., Ltd.), mix evenly, then add the ceramic binder silica sol (purchased from Shandong Kehan ​​Silicon Source New Materials Co., Ltd.), mix evenly again to obtain the heat-absorbing layer material, for later use.

[0054] First, the insulation material is added to the pre-made composite brick mold, filling it to a thickness of 150mm; then, an 80mm layer of heat-absorbing material is added, and then pressed using an NP QT6-15B multi-functional fully automatic brick making machine (Langfang Nianpeng Machinery Equipment Processing Co., Ltd.), with a pressure of 3 tons per square centimeter, to form a ceramic composite brick blank; the pressed ceramic composite brick blank is left to stand for 2 days, and then demolded to obtain a high-temperature resistant, impact-resistant, heat-absorbing and insulating ceramic composite brick (composite brick 1), with specifications of 230mm (length) × 114mm (width) × 65mm (height). Figure 1 As shown. It should be noted that the specifications of composite bricks can be customized according to actual needs. The thickness of the insulation layer, the thickness of the heat absorption layer, and the specifications of the brick body are not considered as constraints.

[0055] Example 3

[0056] This embodiment examines the effect of the heat-absorbing layer on the heat retention and insulation performance of a high-temperature furnace using the composite brick prepared in Example 2. The composite brick used in this embodiment is the one prepared in Example 2; a furnace brick without a heat-absorbing layer (comparative brick 1) is used as a comparison. The specific formulation of comparative brick 1 is completely consistent with the insulation layer formulation in Example 2, and its preparation process is the same as in Example 2, except that the heat-absorbing layer material is replaced with the insulation layer material.

[0057] After preparation, the inner liner of the coal chemical gasification furnace was prepared using composite brick 1 and control brick 1 prepared in Example 2, with one end of the heat-absorbing layer facing the furnace cavity. A commercially available coal chemical gasification furnace (with a ceramic inner liner) (manufactured by Henan Yugong Environmental Protection Technology Co., Ltd.) was used as a control. Both furnaces were used for coal conversion treatment to examine the time to reach the preset temperature and the heat preservation performance during operation.

[0058] The specific results of the investigation are shown in Table 1.

[0059] Table 1: Analysis of the heat retention and insulation performance of gasifiers made from different ceramic bricks

[0060]

[0061] As can be seen from the results in Table 1, under the same condition of reaching the set temperature of 1600℃, the composite brick of the present invention requires 112 minutes, while the existing gasification furnace requires 162 minutes, resulting in a 30.86% improvement in usage time; under the same condition of reaching the set temperature of 1800℃, the composite brick of the present invention requires 127 minutes, while the existing gasification furnace requires 189 minutes, resulting in a 32.80% improvement in usage time; and although the time required to reach the set temperature is reduced for the heat-absorbing brick without a heat-absorbing layer, the effect is not significant. This fully demonstrates that the present invention meets the heat-gathering effect of the heat-absorbing layer of the heat-insulating brick.

[0062] Data on insulation performance shows that existing gasifiers reach a furnace surface temperature of over 200°C when the set temperature is reached, and the temperature reaches 250°C after maintaining the set temperature for 24 hours. In contrast, the gasifier using the composite bricks of this invention has a furnace surface temperature below 100°C when the set temperature is reached, and the temperature remains below 100°C even after maintaining the set temperature for 24 hours. This fully demonstrates that the composite bricks of this invention have excellent insulation performance.

[0063] Example 4

[0064] This embodiment examines the effect of the black dye and its dosage in the heat-absorbing layer on the heat-gathering and heat-insulating performance of the furnace, based on the composite brick prepared in Example 2. In addition to the composite brick prepared in Example 2, this embodiment also includes composite control bricks with different black dyes and dosages, as detailed in Table 2. These control bricks differ from those in Example 2 only in the black dye and dosage; the remaining components, preparation methods, and brick specifications are identical to those in Example 2.

[0065] Table 2: Formulation of different black dyes and dosages in the heat-absorbing layer (unit: kg)

[0066]

[0067] The composite bricks prepared in Example 2 and the comparative bricks 2-7 were used to prepare the inner lining of the coal chemical gasification furnace. Seven furnaces were used for coal conversion treatment, and the time required to reach the preset temperature was investigated. The specific results are shown in Table 3.

[0068] Table 3: Analysis of the heating performance of ceramic bricks with different black pigments in the heat-absorbing layer on the gasifier.

[0069]

[0070] As shown in Table 1, the composite bricks using a mixture of manganese iron black and graphite as the blackbody material for the heat-absorbing layer all require less than 120 minutes to reach the set temperature of 1600℃ and less than 140 minutes to reach the set temperature of 1800℃. The best effect is achieved when the mass ratio of manganese iron black to graphite is 2:1. However, using only one pigment as the blackbody material reduces the heat-gathering effect. This is because graphite has a high thermal conductivity, which can quickly conduct heat from the heat source to the entire material, while manganese iron black has a high heat capacity, which can absorb and store more heat. When graphite and manganese iron black are combined, the gasification furnace can quickly reach the preset temperature and maintain stability.

[0071] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered exemplary and not restrictive in all respects. Furthermore, it should be understood that although this specification describes embodiments, it does not encompass only one technical solution. This descriptive method is merely for clarity, and those skilled in the art should consider the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick, characterized in that: Includes an insulation layer and a heat-absorbing layer; The main components of the insulation layer are vacuum nano-insulating ceramic particles and alloy metal particles containing one or more of the elements tungsten, cobalt, molybdenum or vanadium. The heat-absorbing layer is mainly composed of high-purity alumina of grade 3N and above and black pigment; The components of the insulation layer and the heat absorption layer are filled into the same mold in sections and then pressed and solidified to form the high-temperature resistant, impact-resistant, heat-absorbing and heat-insulating ceramic composite brick. The black pigment is a mixture of manganese iron black and graphite, with a mixing weight ratio of 2:1; the amount of black pigment used is 2% of the weight of high-purity alumina.

2. The high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick according to claim 1, characterized in that: The vacuum nano-insulating ceramic particles are prepared from one or more of silicon carbide, corundum, alumina, or zirconium oxide.

3. The high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick according to claim 2, characterized in that: The amount of alloy metal particles used is 2 to 15% of the weight of the vacuum nano-insulating ceramic particles.

4. The high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick according to claim 1, characterized in that: The black pigment is one or more of manganese iron black, copper chromium black, cobalt black, iron oxide black, and graphite; its dosage is 1.5 to 3.5% of the weight of high-purity alumina.

5. The high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick according to claim 1, characterized in that: The insulation layer and the heat-absorbing layer are bonded together by a ceramic binder, and the amount of the binder accounts for 10% of the weight of the main components of the insulation layer and the heat-absorbing layer, respectively; the thickness ratio of the insulation layer to the heat-absorbing layer is 1 to 3:

1.

6. A method for preparing a high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick according to any one of claims 1-5, characterized in that: Includes the following steps: 1) Preparation of insulation layer materials Vacuum nano-insulating ceramic particles are mixed evenly with alloy metal particles containing one or more of tungsten, cobalt, molybdenum or vanadium, and a ceramic binder is added. The mixture is then mixed evenly and used as insulation material for later use. 2) Preparation of heat-absorbing layer material First, mix high-purity alumina of grade 3N and above with black pigment evenly, then add ceramic binder and mix evenly to make it the heat-absorbing layer material for later use. 3) Pressing The insulation material is first added into the prefabricated composite brick mold, then the heat-absorbing material is added, and then the mold is pressed to form a ceramic composite brick blank. 4) Consolidation The pressed ceramic composite brick blank is left to stand and solidify. After demolding, a high-temperature resistant, impact-resistant, heat-absorbing and heat-insulating ceramic composite brick is obtained.

7. The method for preparing high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite bricks according to claim 6, characterized in that: The pressure of the compact described in step 3) is greater than 1 ton per square centimeter.

8. The method for preparing high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite bricks according to claim 6, characterized in that: The settling time mentioned in step 4) is more than 48 hours.

9. The application of a high-temperature resistant, impact-resistant, heat-absorbing, and heat-insulating ceramic composite brick according to any one of claims 1-5, characterized in that: It is used to make the inner liner material of high-temperature furnaces, and when in use, its insulation layer faces the furnace wall and its heat-absorbing layer faces the furnace cavity.

Images