A wear-resistant zirconium aluminum silicon composite ceramic material and its preparation method

The wear-resistant zirconium aluminum silicon composite ceramic material prepared by using specific components and a multi-stage sintering process solves the problems of high brittleness and poor wear resistance of existing ceramic materials at high temperatures, and realizes the application of high-strength and low-defect ceramic materials, which are suitable for wear protection of industrial equipment and pipelines.

CN119977536BActive Publication Date: 2025-11-14HUNAN TAIXIN PORCELAIN IND CO LTD
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Patent Information

Application Number
CN202510155607.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-02-12
Publication Date
2025-11-14
Estimated Expiration
2045-02-12

AI Technical Summary

Technical Problem

Existing wear-resistant ceramic materials are brittle, have poor wear resistance, and have many surface defects at high temperatures, which limits their application in dynamic impact or load environments.

Method used

Wear-resistant zirconium aluminum silicon composite ceramic materials are prepared using raw materials such as alumina, zirconium frit, fused silica, zirconium diboride, lithium magnesium silicate, cerium oxide and yttrium oxide through a multi-stage process of low-temperature oxidation sintering, vacuum hot pressing sintering and high-temperature nitrogen sintering. The interaction of each component is used to improve the mechanical strength and toughness of the material.

Benefits of technology

The prepared wear-resistant zirconium aluminum silicon composite ceramic material has high fracture toughness and bending strength, and can maintain high strength and low defects in high temperature environment, making it suitable for wear protection of industrial equipment and pipelines.

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Abstract

This invention discloses a wear-resistant zirconium-aluminum-silicon composite ceramic material and its preparation method, relating to the field of wear-resistant alumina ceramic technology. The raw materials include the following parts by weight: 90 parts alumina, 15-40 parts fused silica, 10-30 parts zirconium frit, 2-8 parts zirconium diboride, 1-7 parts lithium magnesium silicate, 0.5-2.0 parts cerium oxide, and 0.3-1.5 parts yttrium oxide; the alumina includes micron-sized alumina, nano-sized alumina, and mesoporous alumina. The preparation method of the wear-resistant zirconium-aluminum-silicon composite ceramic material includes the following steps: S1. Mixing and ball-milling the raw materials according to the required proportions, and then sieving to obtain raw material powder; S2. Subjecting the raw material powder to low-temperature oxidation calcination, vacuum hot-pressing calcination, and high-temperature nitrogen calcination, respectively. The wear-resistant zirconium-aluminum-silicon composite ceramic material of this invention exhibits excellent fracture toughness and maintains good strength even at high temperatures.
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Description

Technical Field

[0001] This invention belongs to the field of wear-resistant alumina ceramic technology, specifically a wear-resistant zirconium aluminum silicon composite ceramic material and its preparation method. Background Technology

[0002] Wear-resistant ceramics are an industrial material with high hardness, excellent wear resistance, high temperature resistance, and corrosion resistance, and are widely used for wear protection of industrial equipment and pipelines. Its main component is alumina, typically made from alumina powder as raw material, formed by dry pressing or isostatic pressing, and then calcined in a high-temperature kiln above 1700℃. In addition, rare metal oxides are added as fluxes, and rubber or high-strength organic / inorganic binders are combined to enhance its performance.

[0003] Wear-resistant ceramics possess high hardness and wear resistance, but their brittleness limits their application in dynamic impact or load environments. Although wear-resistant ceramics themselves have good high-temperature resistance, their temperature resistance is still limited by the temperature resistance of the material itself and the binder. Furthermore, the softening of the material at high temperatures further exacerbates wear. Surface defects in wear-resistant ceramic components (such as microcracks and grain shedding) also accelerate the wear process. Summary of the Invention

[0004] This invention overcomes the problems of existing wear-resistant ceramics, such as high hardness but high brittleness, poor high-temperature resistance, and numerous surface defects. Therefore, this invention provides a wear-resistant zirconium-aluminum-silicon composite ceramic material and its preparation method. This wear-resistant zirconium-aluminum-silicon composite ceramic material possesses excellent mechanical strength, is not easily broken, and also exhibits good high-temperature resistance and few surface defects.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions.

[0006] This invention discloses a wear-resistant zirconium aluminum silicon composite ceramic material, comprising the following raw materials in parts by weight: 90 parts alumina, 15-40 parts fused silica, 10-30 parts zirconium frit, 2-8 parts zirconium diboride, 1-7 parts lithium magnesium silicate, 0.5-2.0 parts cerium oxide and 0.3-1.5 parts yttrium oxide;

[0007] Preferably, the wear-resistant zirconium aluminum silicon composite ceramic material comprises the following raw materials in parts by weight: 90 parts alumina, 20-35 parts fused silica, 12-25 parts zirconium frit, 2-5 parts zirconium diboride, 1-5 parts lithium magnesium silicate, 0.5-1.8 parts cerium oxide, and 0.3-1.2 parts yttrium oxide;

[0008] The alumina includes micron-sized alumina, nano-sized alumina, and mesoporous alumina.

[0009] The mass ratio of the micron-sized alumina to the nano-sized alumina to the mesoporous alumina is 50:15-30:0.5-5.

[0010] Preferably, the mass ratio of the micron-sized alumina to the nano-sized alumina to the mesoporous alumina is 50:25-30:1-3.5.

[0011] The main component of wear-resistant zirconium-aluminum-silicon composite ceramic materials is alumina. Nano-alumina possesses a high specific surface area and excellent thermal conductivity, which can improve the thermal conductivity of micron-sized alumina, thereby enhancing the thermal stability of the ceramic. However, nano-alumina is relatively brittle, and a high proportion may lead to a decrease in the mechanical properties of the ceramic. Zirconium frit contains a high content of zirconium silicate and has high hardness; zirconium diboride has low density and a moderate coefficient of thermal expansion, possessing high-temperature resistance and wear resistance. Both can provide high mechanical strength for wear-resistant zirconium-aluminum-silicon composite ceramic materials. However, zirconium diboride has a high melting point and small particle size, making it prone to agglomeration during sintering, and its coefficient of thermal expansion is higher than that of alumina, resulting in poor melting performance in alumina ceramics. The viscosity and fluidity of fused silica at high temperatures can increase the bonding strength between alumina and zirconium diboride, thereby improving the sintering performance of the ceramic. Cerium oxide and yttrium oxide can be used as toughening agents for wear-resistant zirconium-aluminum-silicon composite ceramic materials, improving the toughness of the material through grain boundary strengthening or particle strengthening. Cerium oxide and yttrium oxide can also interact with high surface energy mesoporous alumina to form a stable interface, thereby enhancing the mechanical properties of the material.

[0012] In this invention, the D50 of the micron-sized alumina is ≤10μm, and preferably, the D50 of the micron-sized alumina is 5-6μm.

[0013] In this invention, the D50 of the nano-alumina is ≤50nm; preferably, the D50 of the nano-alumina is 20-30nm.

[0014] In this invention, the average pore size of the mesoporous alumina is 6-8 nm, for example 7.19 nm.

[0015] In this invention, the specific surface area of ​​the mesoporous alumina is 140–150 m². 2 / g, for example 144.8m 2 / g.

[0016] In this invention, the total pore volume of the mesoporous alumina is 0.24–0.27 cm³. 3 / g, for example 0.260cm 3 / g.

[0017] In this invention, the zirconium diboride has a particle size of 100–200 nm.

[0018] In this invention, the zirconium ingot comprises the following chemical composition by mass fraction: 3-8% Al2O3, 12-20% CaO, 0.5-2% MgO, 1-4% K2O, 7-15% ZrO2, 6-10% ZnO and balance SiO2.

[0019] In this invention, the fracture toughness of the wear-resistant zirconium aluminum silicon composite ceramic material is 6.0–6.7 MPa·m. 1 / 2 .

[0020] In this invention, the flexural strength of the wear-resistant zirconium aluminum silicon composite ceramic material is 780-792 MPa.

[0021] This invention also discloses a method for preparing a wear-resistant zirconium aluminum silicon composite ceramic material, comprising the following steps:

[0022] S1. Mix the raw materials according to the required proportions, ball mill, and sieve to obtain raw material powder;

[0023] S2. The raw material powder is subjected to low-temperature oxidation calcination, vacuum hot pressing calcination and high-temperature nitrogen calcination to obtain wear-resistant zirconium aluminum silicon composite ceramic material.

[0024] In S1, the ball-to-material ratio of the ball mill is 4 to 5:1.

[0025] In S1, the ball milling time is 4 to 10 hours.

[0026] In S1, the mesh size of the sieve is 500 to 800 mesh.

[0027] In S2, the temperature of the low-temperature oxidation sintering is 750-900℃ and the time is 3-5h.

[0028] In S2, the atmosphere of the low-temperature oxidation sintering contains 15-20% oxygen by volume.

[0029] In S2, the main purpose of low-temperature oxidation sintering is to pre-sinter the alumina and zirconium frit. This process promotes the crystal transformation of alumina and removes impurities, thus avoiding porosity or grain boundary defects caused by impurity residues during subsequent high-temperature sintering. This significantly improves the density and purity of the wear-resistant zirconium-aluminum-silicon composite ceramic material. Furthermore, low-temperature oxidation sintering can activate the toughening agents cerium oxide and yttrium oxide, promoting their liquid phase formation, thereby effectively reducing the temperature requirements for subsequent sintering processes.

[0030] In S2, the vacuum hot pressing calcination temperature is 1000-1100℃ and the time is 3-5h.

[0031] In S2, the pressure of the vacuum hot pressing calcination is 20-30 MPa.

[0032] In S2, the vacuum degree of the vacuum hot pressing calcination is 1 to 5 Pa.

[0033] In S2, vacuum hot-pressing calcination is a hot-pressing sintering process performed under vacuum. During this process, physical pressure is applied to compress the interparticle gaps, thereby promoting material densification. Simultaneously, the vacuum environment effectively prevents the damage to easily oxidized components (such as zirconium diboride) caused by oxidation. Furthermore, the liquid phase formed by the gradual decomposition of fused silica and lithium magnesium silicate at high temperatures can be uniformly dispersed under vacuum conditions, further promoting grain growth and densification of the sintered body. Meanwhile, the zirconium silicate in the zirconium fused mass decomposes into zirconium oxide and silicon oxide at high temperatures, and the vacuum environment prevents excessive oxidation of zirconium oxide, thus enhancing the toughness of the wear-resistant zirconium-aluminum-silicon composite ceramic material.

[0034] In S2, the high-temperature nitrogen sintering temperature is 1500–1700℃ and the time is 5–8h;

[0035] In S2, the pressure of the nitrogen gas used in the high-temperature nitrogen sintering is 2-3 MPa.

[0036] In S2, high-temperature nitrogen sintering and the nitrogen environment inhibit excessive grain growth, maintain a fine-grained structure, and preserve the high strength and toughness of the wear-resistant zirconium aluminum silicon composite ceramic material.

[0037] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0038] Compared with the prior art, the beneficial effects of the present invention are:

[0039] 1. In the raw materials for preparing the wear-resistant zirconium aluminum silicon composite ceramic material of the present invention, alumina is the main component. Although nano-alumina can improve thermal stability, adding too much will reduce mechanical properties. Zirconium frit and zirconium diboride can improve mechanical strength, but zirconium diboride is prone to agglomeration and has poor melting performance. Fused silica can improve its sintering performance. Cerium oxide and yttrium oxide are used as toughening agents to enhance the toughness of the material through grain boundary or particle strengthening, and form a stable interface with mesoporous alumina to improve mechanical properties.

[0040] 2. The calcination process of this invention is divided into three stages: low-temperature oxidation calcination, vacuum hot-pressing calcination, and high-temperature nitrogen calcination. The main purpose of low-temperature oxidation calcination is to pre-calcine the alumina and zirconium frit to promote crystal transformation and remove impurities, thereby improving the density and purity of the material. Furthermore, it can activate toughening agents such as cerium oxide and yttrium oxide, and lower the sintering temperature. Vacuum hot-pressing calcination is a hot-pressing sintering process performed in a vacuum environment. By using physical pressure to compress the intergranular spaces, it avoids damage to easily oxidized components from the oxidizing environment, while simultaneously promoting liquid phase formation and enhancing the toughness of the material. High-temperature nitrogen calcination, through the nitrogen environment, inhibits excessive grain growth, maintains a fine-grained structure, and thus preserves the high strength and toughness of the material.

[0041] 3. The wear-resistant zirconium-aluminum-silicon composite ceramic material of the present invention exhibits high fracture toughness and flexural strength. In some preferred embodiments, its fracture toughness can reach 6.0–6.7 MPa·m. 1 / 2 Its flexural strength is 780-792 MPa. Attached Figure Description

[0042] Figure 1 The images show a comparison of the appearance of the wear-resistant zirconium aluminum silicon composite ceramic materials of Example 1 and Comparative Example 1. Detailed Implementation

[0043] To facilitate understanding of the present invention, the present invention will be described more fully and in detail below with reference to preferred embodiments, but the scope of protection of the present invention is not limited to the following specific embodiments.

[0044] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of the invention.

[0045] The "range" disclosed in this invention is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of a particular range. Ranges defined in this way can include or exclude endpoints and can be combined arbitrarily; that is, any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60-120 and 80-110 are listed for specific parameters, it is understood that ranges of 60-110 and 80-120 are also expected. Furthermore, if minimum range values ​​1 and 2 are listed, and if maximum range values ​​3, 4, and 5 are listed, then the following ranges are all expected: 1-3, 1-4, 1-5, 2-3, 2-4, and 2-5. In this invention, unless otherwise stated, the numerical range "ab" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" have been listed herein; "0-5" is merely a shortened representation of these numerical combinations. Furthermore, when a parameter is described as an integer greater than or equal to 2, it is equivalent to disclosing that the parameter is, for example, an integer such as 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0046] Unless otherwise specified, all embodiments and optional embodiments of the present invention can be combined with each other to form new technical solutions.

[0047] Unless otherwise specified, all technical features and optional technical features of this invention can be combined to form new technical solutions.

[0048] Unless otherwise specified, all steps of the present invention may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0049] Unless otherwise specified, the terms "comprising" and "including" as used in this invention can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0050] Unless otherwise specified, the term "or" is inclusive in this invention. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, the condition "A or B" is satisfied by any of the following conditions: A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or both A and B are true (or exist).

[0051] The raw materials used in the following examples are as follows:

[0052] Nano-alumina D50 = 20 nm; Micro-alumina D50 = 5 μm.

[0053] The mesoporous alumina has an average pore size of 7.19 nm and a specific surface area of ​​144.8 m². 2 / g, total pore volume is 0.260cm³ 3 / g.

[0054] The fused silica was purchased from Lianyungang Taosheng Fused Quartz Co., Ltd.

[0055] The magnesium lithium silicate was purchased from Shijiazhuang Lishang Mineral Products Processing Co., Ltd.

[0056] Zirconium diboride with a particle size of 100–200 nm was purchased from Zhejiang Zhitai Nanomaterials Co., Ltd.

[0057] The zirconium ingot has the following composition: 6.3% Al2O3, 16.3% CaO, 1.8% MgO, 3.3% K2O, 13.4% ZrO2, 7.1% ZnO and balance SiO2.

[0058] Example 1

[0059] 1. The wear-resistant zirconium-aluminum-silicon composite ceramic material of this embodiment is composed of the following raw materials in parts by weight: 90 parts alumina, 20 parts fused silica, 18 parts zirconium frit, 3.2 parts zirconium diboride, 2.3 parts lithium magnesium silicate, 0.87 parts cerium oxide and 0.62 parts yttrium oxide;

[0060] The mass ratio of micron-sized alumina to nano-sized alumina to mesoporous alumina in the alumina is 50:25:3.

[0061] 2. The preparation method of the wear-resistant zirconium aluminum silicon composite ceramic material in this embodiment is as follows:

[0062] S1. The above-mentioned raw materials are ball-milled for 8 hours at a ball-to-material ratio of 5:1, and then passed through a 600-mesh sieve to obtain raw material powder;

[0063] S2. After subjecting the raw material powder to low-temperature oxidation calcination, vacuum hot pressing calcination and high-temperature nitrogen calcination respectively, the powder is cooled in the furnace to obtain wear-resistant zirconium aluminum silicon composite ceramic material;

[0064] The low-temperature oxidation sintering temperature was 800℃ and the time was 3h, with the atmosphere containing 18% oxygen by volume.

[0065] The vacuum hot pressing calcination temperature was 1100℃, the time was 3h, the pressure was 25MPa, and the vacuum degree was 1Pa.

[0066] The high-temperature nitrogen sintering temperature was 1600℃, the time was 7h, and the nitrogen pressure was 2.5MPa.

[0067] The appearance diagram of the wear-resistant zirconium-aluminum-silicon composite ceramic material obtained in this embodiment is shown below. Figure 1 The left image shows a uniform appearance with no obvious defects.

[0068] Example 2

[0069] The difference between this embodiment and Embodiment 1 is as follows:

[0070] The wear-resistant zirconium aluminum silicon composite ceramic material of this embodiment is composed of the following raw materials in parts by weight: 90 parts alumina, 25 parts fused silica, 13 parts zirconium frit, 4.7 parts zirconium diboride, 3.6 parts lithium magnesium silicate, 1.20 parts cerium oxide and 0.43 parts yttrium oxide.

[0071] All other steps and parameters are the same as in Example 1.

[0072] Example 3

[0073] The difference between this embodiment and Embodiment 1 is as follows:

[0074] The mass ratio of micron-sized alumina to nano-sized alumina to mesoporous alumina in the alumina is 50:30:2.

[0075] All other steps and parameters are the same as in Example 1.

[0076] Example 4

[0077] The difference between this embodiment and Embodiment 1 is as follows:

[0078] The wear-resistant zirconium aluminum silicon composite ceramic material of this embodiment is composed of the following raw materials in parts by weight: 90 parts alumina, 28 parts fused silica, 13 parts zirconium frit, 5 parts zirconium diboride, 1.5 parts lithium magnesium silicate, 1.8 parts cerium oxide and 0.3 parts yttrium oxide.

[0079] The mass ratio of micron-sized alumina to nano-sized alumina to mesoporous alumina in the alumina is 50:30:3.5.

[0080] All other steps and parameters are the same as in Example 1.

[0081] Example 5

[0082] The difference between this embodiment and Embodiment 1 is as follows:

[0083] The low-temperature oxidation sintering temperature was 750℃ and the time was 4h, with the atmosphere containing 15% oxygen by volume.

[0084] The vacuum hot pressing calcination temperature was 1000℃, the time was 4h, the pressure was 30MPa, and the vacuum degree was 3Pa.

[0085] The high-temperature nitrogen sintering temperature was 1700℃, the time was 5h, and the nitrogen pressure was 3MPa.

[0086] All other steps and parameters are the same as in Example 1.

[0087] Comparative Example 1

[0088] The difference between this comparative example and Example 1 is as follows:

[0089] The wear-resistant zirconium-aluminum-silicon composite ceramic material of this comparative example is composed of the following raw materials in parts by weight: 90 parts alumina, 25 parts quartz powder, 16.4 parts zirconium frit, 3.8 parts zirconium diboride, 4.2 parts lithium magnesium silicate, 0.78 parts cerium oxide and 0.52 parts yttrium oxide.

[0090] Quartz powder was purchased from Lianyungang Haosen Mineral Products Co., Ltd., with a particle size distribution of 10–53 μm.

[0091] All other steps and parameters are the same as in Example 1.

[0092] The appearance diagram of the wear-resistant zirconium aluminum silicon composite ceramic material obtained in this comparative example is shown below. Figure 1 The image on the right.

[0093] Comparative Example 2

[0094] The difference between this comparative example and Example 1 is as follows:

[0095] The mass ratio of micron-sized alumina to nano-sized alumina in the alumina is 2:1, and it does not contain mesoporous alumina.

[0096] All other steps and parameters are the same as in Example 1.

[0097] Comparative Example 3

[0098] The difference between this comparative example and Example 1 is as follows:

[0099] The wear-resistant zirconium-aluminum-silicon composite ceramic material of this comparative example is composed of the following raw materials in parts by weight: 90 parts alumina, 30 parts fused silica, 15 parts zirconium frit, 4.3 parts lithium magnesium silicate, 1.0 part cerium oxide and 0.6 parts yttrium oxide.

[0100] Comparative Example 4

[0101] The difference between this comparative example and Example 1 is as follows:

[0102] This comparative example does not include a low-temperature oxidation sintering process;

[0103] The vacuum hot pressing calcination temperature was 1300℃, the time was 2h, the pressure was 30MPa, and the vacuum degree was 1Pa.

[0104] All other steps and parameters are the same as in Example 1.

[0105] Test case

[0106] The fracture toughness and flexural strength test results of the wear-resistant zirconium aluminum silicon composite ceramic materials prepared in the above embodiments and comparative examples are shown in Table 1.

[0107] The fracture toughness test method refers to GB / T 23806; the flexural strength test method refers to GB / T14390, and the test temperature is 1000℃.

[0108] Table 1

[0109] Project Number <![CDATA[Fracture toughness (MPa·m 1 / 2 )]]> Bending strength (MPa) Example 1 6.63 787 Example 2 6.55 784 Example 3 6.48 790 Example 4 6.27 786 Example 5 6.61 792 Comparative Example 1 4.88 678 Comparative Example 2 5.41 629 Comparative Example 3 3.63 527 Comparative Example 4 4.39 745

[0110] As shown in Table 1 and the attached figures: Comparative Example 1 used ordinary quartz powder instead of fused silica. Quartz powder has relatively poor bonding properties compared to fused silica, resulting in numerous surface defects in the final wear-resistant zirconium-aluminum-silicon composite ceramic material, such as pinholes and bulges. Comparative Example 2 did not add mesoporous alumina, relying solely on yttrium oxide and cerium oxide, resulting in poor toughening. Comparative Example 3 did not add zirconium diboride, which led to a decrease in the overall strength of the wear-resistant zirconium-aluminum-silicon composite ceramic material to varying degrees.

[0111] Unless otherwise specified, all raw materials, reagents, instruments, and equipment used in this invention can be purchased commercially or prepared using existing methods. The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this invention. It should be understood that the above descriptions are merely specific embodiments of this invention and are not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A wear-resistant zirconium aluminum silicon composite ceramic material, characterized in that, The raw materials include the following parts by weight: 90 parts alumina, 15-40 parts fused silica, 10-30 parts zirconium frit, 2-8 parts zirconium diboride, 1-7 parts lithium magnesium silicate, 0.5-2.0 parts cerium oxide, and 0.3-1.5 parts yttrium oxide; The alumina includes micron-sized alumina, nano-sized alumina, and mesoporous alumina; the mass ratio of micron-sized alumina to nano-sized alumina to mesoporous alumina is 50:15~30:0.5~5. The zirconium ingot comprises the following chemical composition by mass fraction: 3~8% Al2O3, 12~20% CaO, 0.5~2% MgO, 1~4% K2O, 7~15% ZrO2, 6~10% ZnO and balance SiO2.

2. The wear-resistant zirconium aluminum silicon composite ceramic material as described in claim 1, characterized in that, At least one of the following conditions a to e must be satisfied: a. The D50 of the micron-sized alumina is ≤10μm; b. The D50 of the nano-alumina is ≤50nm; c. The average pore size of the mesoporous alumina is 6~8 nm; d. The total pore volume of the mesoporous alumina is 0.24~0.27 cm³. 3 / g; e. The zirconium diboride has a particle size of 100~200 nm.

3. The wear-resistant zirconium aluminum silicon composite ceramic material as described in claim 1, characterized in that, At least one of the following conditions a to b must be met: a. The fracture toughness of the wear-resistant zirconium aluminum silicon composite ceramic material is 6.0~6.7 MPa·m. 1 / 2 ; b. The flexural strength of the wear-resistant zirconium aluminum silicon composite ceramic material is 780~792MPa.

4. The method for preparing the wear-resistant zirconium aluminum silicon composite ceramic material according to any one of claims 1 to 3, characterized in that, Includes the following steps: S1. Mix the raw materials according to the required proportions, ball mill, and sieve to obtain raw material powder; S2. The raw material powder is subjected to low-temperature oxidation calcination, vacuum hot pressing calcination and high-temperature nitrogen calcination to obtain wear-resistant zirconium aluminum silicon composite ceramic material.

5. The method for preparing the wear-resistant zirconium aluminum silicon composite ceramic material as described in claim 4, characterized in that, At least one of the following conditions a to c must be met: a. The ball-to-material ratio of the ball mill is 4~5:1; b. The ball milling time is 4~10 hours; c. The mesh size of the sieve is 500~800 mesh.

6. The method for preparing the wear-resistant zirconium aluminum silicon composite ceramic material as described in claim 4, characterized in that, At least one of the following conditions a to b must be met: a. The low-temperature oxidation calcination temperature is 750~900℃ and the time is 3~5h; b. The atmosphere of the low-temperature oxidation calcination contains 15-20% oxygen by volume.

7. The method for preparing the wear-resistant zirconium aluminum silicon composite ceramic material as described in claim 4, characterized in that, At least one of the following conditions a to c must be met: a. The vacuum hot pressing calcination temperature is 1000~1100℃ and the time is 3~5h; b. The pressure of the vacuum hot pressing calcination is 20~30MPa; c. The vacuum degree of the vacuum hot pressing calcination is 1~5 Pa.

8. The method for preparing the wear-resistant zirconium aluminum silicon composite ceramic material as described in claim 4, characterized in that, At least one of the following conditions a to b must be met: a. The high-temperature nitrogen calcination temperature is 1500~1700℃ and the time is 5~8h; b. The pressure of the nitrogen gas used in the high-temperature nitrogen calcination is 2~3 MPa.

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