High-strength corrosion-resistant silicon-based material and preparation method thereof

Abstract

The invention belongs to the technical field of ceramic materials, and particularly relates to a high-strength corrosion-resistant silicon-based material and a preparation method thereof. The low-temperature-resistant ceramic material is prepared from the following components in parts by weight: 50 to 55 parts of SiO2, 0.1 to 0.5 part of Al2O3, 2 to 6 parts of CaO, 2 to 6 parts of B2O3, 0.8 to 2.5 parts of TiO2, 0.5 to 1.5 parts of Co2O3, 5 to 15 parts of alkali metal oxide, 1 to 3 parts of zirconite tailings, 3.5 to 5.5 parts of ZnO and 0.1 to 1.5 parts of rare earth oxide. After the zinc oxide and the rare earth oxide are added, the defects of pores and the like of a ceramic layer are reduced, the compactness is improved, the contact area of corrosive liquid borne by microscopic particles is reduced, the loss amount caused by corrosion is reduced accordingly, meanwhile, the particles of the ceramic layer are more compact, crystal grains are refined, and the mechanical property of the enamel material is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of ceramic materials, and in particular relates to a high-strength, corrosion-resistant silicon-based material and a preparation method thereof. Background Art

[0002] With the advancement of modern science and technology, especially the rapid development of aerospace technology, the large-scale utilization of atomic energy, and the emergence of emerging industries such as ocean development, industrial production has placed increasingly higher demands on structural materials. In many aspects, traditional metals or alloys have been unable to meet the needs of practical applications.

[0003] Industrial production is placing increasingly stringent demands on material performance. Due to the increasingly demanding operating conditions of engineering machinery, ceramic production auxiliary equipment, and components, materials are required to possess properties such as high-temperature resistance, high-temperature oxidation resistance, vibration resistance, fatigue resistance, resistance to sudden temperature changes, and erosion resistance. This makes it difficult for simple metal materials to meet these requirements. Metal alloys offer high strength, good toughness, and thermal conductivity at high temperatures, but their poor oxidation resistance at high temperatures limits their use in these conditions.

[0004] Ceramic materials have good high-temperature oxidation resistance and wear resistance. Therefore, various functional ceramics are evenly coated on the surface of the base metal (or alloy) material using a certain process. The resulting composite material has both the good physical and mechanical properties of metals (or alloys) and the advantages of various functional materials, such as heat resistance, wear resistance, corrosion resistance, superconductivity and biological activity.

[0005] Metal-based ceramic coatings are applied to metal surfaces to protect and strengthen them, thereby increasing the lifespan and reliability of parts, improving the performance and quality of mechanical equipment, and saving materials and energy. Therefore, the research on metal-based ceramic coatings has broad prospects for development.

[0006] Vitreous enamel coating involves applying glass frit to a metal substrate and then firing it at high temperature, allowing the enamel layer to interact with the metal substrate, forming a dense coating that is firmly bonded to the substrate. Unlike conventional ceramic coatings, vitreous enamel coatings possess the properties of glass. Not only do they offer a smooth and aesthetically pleasing surface, they also possess exceptional corrosion resistance, wear resistance, high-temperature resistance, and electrical non-conductivity. These properties are difficult to achieve in other materials, leading to their widespread application in aerospace, chemical engineering, and other fields. Applying a vitreous enamel layer to a metal substrate effectively extends its service life and addresses the conflict between high-temperature alloys and their inherent high-temperature mechanical properties and corrosion resistance. Conventional vitreous enamel coatings are thin and primarily serve to protect the base metal; the high-temperature strength requirement is primarily borne by the base alloy. Because the base alloy and protective coating can be independently designed, alloy components coated with the protective coating can maintain sufficient high-temperature strength while also exhibiting excellent high-temperature corrosion resistance, particularly in applications requiring high-temperature corrosion resistance. To improve the corrosion resistance of ceramic coatings, CN107540226A mixes power plant fly ash and additives according to the formula ratio of enamel glaze, melts them at high temperature, and then quenches them with water. A certain ratio of clay, bentonite, borax, surface modifiers, and water are added and ground to produce an acid-resistant enamel slurry. By utilizing the high acid-resistant aluminum oxide and calcium oxide content in power plant fly ash, combined with raw materials such as quartz sand, an acid-resistant enamel glaze is formulated and produced for use in power plant air preheaters and other applications, achieving energy conservation and environmental protection across the entire industry chain. CN117700107A adds FCC waste catalyst as a functional filler to further improve its acid and alkali corrosion resistance. However, the type of FCC waste catalyst used is expensive, making it difficult to promote and use. While the use of fly ash improves the corrosion resistance of the product to a certain extent, the improvement is limited and cannot meet the requirements of use in harsh conditions. Summary of the Invention

[0007] In order to overcome the above-mentioned shortcomings, the present invention provides a high-strength, corrosion-resistant silicon-based material using zircon tailings as raw materials and a preparation method thereof. The high-acid-resistant alumina and zirconium oxide contained in zircon tailings are combined with raw materials such as rare earth oxides to configure a high-strength, corrosion-resistant silicon-based material, thereby achieving energy conservation and environmental protection for the entire industrial chain and having very good economic benefits.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 50-55 parts, Al2O3 0.1-0.5 parts, CaO 2-6 parts, B2O3 2-6 parts, TiO2 0.8-2.5 parts, Co2O3 0.5-1.5 parts, Na2O+K2O+Li2O 5-15 parts, zircon tailings 1-3 parts, ZnO 3.5-5.5 parts, rare earth oxide 0.1-1.5 parts; the rare earth oxide is composed of CeO2 and Y2O3 in a mass ratio of 1:(0.1-0.5).

[0009] During the production of zircon minerals, a large amount of solid waste zircon tailings and a very small amount of zircon sand are discharged. The Al2O3 content of zircon tailings is as high as 60%, and zircon tailings are relatively cheap compared to other raw materials. The rational use of waste mineral zircon tailings to synthesize corrosion-resistant silicon-based materials will greatly reduce production costs and is of great significance for saving energy, rationally utilizing existing resources and protecting the ecological environment. However, compared with high-value recycled materials such as FCC waste catalysts, silicon-based materials prepared from zircon tailings are not corrosion-resistant. In order to solve the above problems, the present invention adds a certain amount of zinc oxide and rare earth oxides.

[0010] Zinc ions are non-inert cations, with electron clouds that are easily deformed and unstable in coordination. In glass systems, zinc ions exist in two coordination states: tetrahedral and octahedral. Adding an appropriate amount of ZnO to frit glaze not only aids fluxing, improving the glaze's gloss, elastic modulus, and chemical stability, while reducing its tendency to crack, but also enhances the glaze's corrosion resistance. Specifically, the ZnO dosage is 4-5 parts; excessive ZnO addition can increase the frit's tendency to crystallize. Furthermore, when excessive zinc ions form tetrahedral coordination within the frit glaze system, they reduce the frit's density, leading to decreased corrosion resistance. Therefore, the present invention adds specific amounts of rare earth oxides, CeO2 and Y2O3, to ZnO. CeO2 itself is a high-melting-point oxide, making it a highly susceptible nucleation target for heterogeneous nucleation. New phases easily attach to the CeO2 surface to form nuclei, resulting in a higher crystalline content within the enamel coating and finer grains. Cerium is the only common tetravalent lanthanide element. Tetravalent cerium oxide can form a dense oxide layer, offering enhanced corrosion resistance. Yttrium and cerium belong to different element groups, with significantly different atomic radii. An appropriate amount of Y2O3 helps refine the glaze's grains and reduce interionic stress. Rare earth elements of varying atomic radii fill the intergranular spaces, increasing density and improving corrosion resistance to acids and alkalis. Specifically, a dosage of 0.5-1 part rare earth oxide can refine grains, prevent abnormal grain growth, and enhance density.

[0011] In general, after adding zinc oxide and rare earth oxides, the hardness of the enamel coating is improved. During the corrosion process, the corrosive liquid is difficult to embed into the enamel coating containing rare earth and other components. In addition, the defects such as pores in the porcelain layer are reduced, the density is improved, and the contact area of ​​the microscopic particles with the corrosive liquid is reduced, and the amount of loss caused by corrosion is reduced accordingly. At the same time, the particles in the porcelain layer are more compact, and the intermolecular cohesion is enhanced, which reduces the possibility of microcracks. In addition, the enamel coating with the addition of rare earths has a higher crystal phase content, finer grains, and improved fracture toughness. When subjected to stress, the flocculent structure in the coating buffers the stress through elastic deformation, greatly improving the mechanical properties of the enamel material.

[0012] In one embodiment, Na2O comprises 4-8 parts, K2O 0.5-3 parts, and Li2O 0.5-4 parts. The binding capacity of alkali metal cations with oxygen ions decreases with increasing ionic radius. The introduction of three different types of alkali metal oxides loosens the structure of the frit glaze, lowers its melting temperature, reduces its viscosity, and improves processing performance.

[0013] In one embodiment, the zircon tailings contain, by weight percentage, the following: Al2O3 58-65%, SiO2 28-35%, Fe2O3 0.1-1%, Na2O 0.02-0.1%, ZrO2 0.5-1.5%, MgO 0.1-0.5%, CaO 0.05-0.15%, TiO2 1-2%, Cr2O3 0.01-0.12%, K2O 0.01-0.08%, and a loss on ignition of 0.1-0.5%.

[0014] On the other hand, the present invention also provides a method for preparing a high-strength, corrosion-resistant silicon-based material, comprising the following steps: (1) Weigh each component by weight; (2) First, calcining the zircon tailings, and then mixing and crushing the calcined zircon tailings with other raw materials to obtain a premix; (3) The premix is ​​melted at high temperature, the molten material is put into cold water for quenching, and then taken out and dried to obtain a high-strength, corrosion-resistant silicon-based material.

[0015] In one embodiment, the specific process of calcining the zircon tailings in step (2) is as follows: calcining the zircon tailings at a high temperature of 1100-1150° C., then quenching the zircon tailings in cold water, taking them out and drying them to obtain calcined zircon tailings.

[0016] In one embodiment, the drying temperature is 100-120° C., and the drying time is 0.5-1 h.

[0017] In one embodiment, the high temperature melting temperature in step (3) is 1250°C-1450°C.

[0018] In one embodiment, the high-temperature melting time in step (3) is 1-2 hours.

[0019] Beneficial Effects: The rational utilization of waste zircon tailings to synthesize corrosion-resistant silicon-based materials will significantly reduce production costs and is of great significance for energy conservation, the rational use of existing resources, and ecological protection. However, silicon-based materials prepared from zircon tailings are not corrosion-resistant. The addition of zinc oxide and rare earth oxides addresses the reduced corrosion resistance caused by the addition of zircon tailings. Adding an appropriate amount of ZnO to frit glaze not only acts as a flux but also improves the glaze's corrosion resistance. However, excessive ZnO addition can increase the frit's tendency to crystallize. CeO2, a high-melting-point oxide, is a strong candidate for heterogeneous nucleation. New phases easily attach to the CeO2 surface to form nuclei, resulting in a higher crystalline phase content and finer grains within the enamel coating. Yttrium and cerium belong to different element groups and have significantly different atomic radii. An appropriate amount of Y2O3 promotes grain refinement within the glaze, reducing interionic stress. Rare earth elements of varying atomic radii fill the intergranular spaces, increasing density and improving corrosion resistance to acids and alkalis. DETAILED DESCRIPTION

[0020] Below in conjunction with specific embodiment, the present invention is described in further detail.Should be understood equally that following example system is used to further illustrate the present invention, and can not be interpreted as limiting the scope of protection of the present invention, some non-essential improvements and adjustments that those skilled in the art make according to the foregoing of the present invention all belong to protection scope of the present invention.The specific reaction temperature, time etc. of following example are also only an example in the appropriate range, and promptly those skilled in the art can make selection in the appropriate range by the description of this paper, and are not limited to the specific numerical value of example hereinafter.

[0021] The zircon tailings used in the following examples and comparative examples are the same, and contain, by weight percentage, the following: Al2O3 62.36%, SiO2 32.58%, Fe2O3 0.61%, Na2O 0.08%, ZrO2 1.01%, MgO 0.25%, CaO 0.08%, TiO2 1.41%, Cr2O3 0.08%, K2O 0.05%, and a loss on ignition of 0.41%.

[0022] The preparation methods of the high-strength, corrosion-resistant silicon-based materials described in the following examples and comparative examples are the same, comprising the following steps: (1) Weigh each component by weight; (2) The zircon tailings are calcined at a high temperature of 1130°C, then put into cold water for quenching, taken out and dried to obtain calcined zircon tailings, and then the calcined zircon tailings are mixed with other raw materials and crushed to obtain a premix; the drying temperature is 120°C and the drying time is 1 hour; (3) The premix is ​​melted at high temperature, the molten material is put into cold water for quenching, and then taken out and dried to obtain a high-strength, corrosion-resistant silicon-based material; the high-temperature melting temperature is 1340°C, and the high-temperature melting time is 1.5 hours.

[0023] Performance Testing: Using the same process, the high-strength, corrosion-resistant silicon-based materials prepared in the following examples and comparative examples were prepared into a glaze slurry. This slurry was then coated onto treated steel plates and calcined at high temperature to produce the enameled products. The products were then tested for acid resistance, alkali resistance, and impact resistance. The test method for corrosion resistance in 20% boiling hydrochloric acid for 168 hours followed GB / T 7989-2013; the test method for corrosion resistance in 0.1 mol / L sodium hydroxide at 80°C for 24 hours followed GB / T 7988-2013; and the test method for mechanical impact resistance followed GB / T 7990-2013.

[0024] Example 1 A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 50 parts, Al2O3 0.1 parts, CaO 2.8 parts, B2O3 3 parts, TiO2 0.8 parts, Co2O3 0.5 parts, Na2O 4 parts, Li2O 0.8 parts, K2O 0.8 parts, zircon tailings 1 part, ZnO 3.5 parts, rare earth oxide 0.6 parts; rare earth oxide is composed of CeO2 and Y2O3 with a mass ratio of 1:0.1. After testing, its acid corrosion resistance is 0.38g / (m 2 ·d), alkali corrosion resistance is 1.29g / (m 2 ·d), mechanical impact resistance is 0.326J.

[0025] Example 2 A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 55 parts, Al2O3 0.5 parts, CaO 5.5 parts, B2O3 5.5 parts, TiO2 2.5 parts, Co2O3 1.5 parts, Na2O 8 parts, Li2O 3.5 parts, K2O 3 parts, zircon tailings 3 parts, ZnO 5 parts, rare earth oxide 1.2 parts; rare earth oxide is composed of CeO2 and Y2O3 with a mass ratio of 1:0.5. After testing, its acid corrosion resistance is 0.21g / (m 2 ·d), alkali corrosion resistance is 1.10g / (m 2·d) Mechanical impact resistance is 0.332J.

[0026] Example 3 A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 53 parts, Al2O3 0.3 parts, CaO 4 parts, B2O3 4.2 parts, TiO2 1.4 parts, Co2O3 1 part, Na2O 6 parts, Li2O 2.5 parts, K2O 1.5 parts, zircon tailings 2 parts, ZnO 5.5 parts, rare earth oxide 1 part; the rare earth oxide is composed of CeO2 and Y2O3 in a mass ratio of 1:0.3. After testing, its acid corrosion resistance is 0.30g / (m 2 ·d), alkali corrosion resistance is 1.12g / (m 2 ·d), mechanical impact resistance is 0.327J.

[0027] Example 4 A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 50 parts, Al2O3 0.5 parts, CaO 2.8 parts, B2O3 5.5 parts, TiO2 0.8 parts, Co2O3 1.5 parts, Na2O 7.2 parts, Li2O 3.2 parts, K2O 0.9 parts, zircon tailings 1 part, ZnO 5 parts, rare earth oxide 0.6 parts; rare earth oxide is composed of CeO2 and Y2O3 with a mass ratio of 1:0.5. After testing, its acid corrosion resistance is 0.34g / (m 2 ·d), alkali corrosion resistance is 1.22g / (m 2 ·d), mechanical impact resistance is 0.341J.

[0028] Example 5 A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 53 parts, Al2O3 0.3 parts, CaO 4 parts, B2O3 4.2 parts, TiO2 1.4 parts, Co2O3 1 part, Na2O 6 parts, Li2O 2.5 parts, K2O 1.5 parts, zircon tailings 2 parts, ZnO 4.2 parts, rare earth oxide 0.1 parts; rare earth oxide is composed of CeO2 and Y2O3 with a mass ratio of 1:0.3. After testing, its acid corrosion resistance is 0.39g / (m 2 ·d), alkali corrosion resistance is 1.27g / (m 2 ·d) Mechanical impact resistance is 0.330J.

[0029] Example 6 A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 51 parts, Al2O3 0.2 parts, CaO 3.2 parts, B2O3 3.3 parts, TiO2 1 part, Co2O3 0.7 parts, Na2O 5 parts, Li2O 1.5 parts, K2O 1.2 parts, zircon tailings 1.5 parts, ZnO 4 parts, rare earth oxide 0.8 parts; rare earth oxide is composed of CeO2 and Y2O3 with a mass ratio of 1:0.2. After testing, its acid corrosion resistance is 0.25g / (m 2 ·d), alkali corrosion resistance is 1.11g / (m 2 ·d), mechanical impact resistance is 0.336J.

[0030] Example 7 A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 53 parts, Al2O3 0.3 parts, CaO 4 parts, B2O3 4.2 parts, TiO2 1.4 parts, Co2O3 1 part, Na2O 6 parts, Li2O 2.5 parts, K2O 1.5 parts, zircon tailings 2 parts, ZnO 4.2 parts, rare earth oxide 1.5 parts; rare earth oxide is composed of CeO2 and Y2O3 with a mass ratio of 1:0.3. After testing, its acid corrosion resistance is 0.23g / (m 2 ·d), alkali corrosion resistance is 1.09g / (m 2 ·d), mechanical impact resistance is 0.329J.

[0031] Example 8 A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 54 parts, Al2O3 0.4 parts, CaO 5 parts, B2O3 5 parts, TiO2 2 parts, Co2O3 1.2 parts, Na2O 7 parts, Li2O 3 parts, K2O 2.5 parts, zircon tailings 2.5 parts, ZnO 4.5 parts, rare earth oxide 1 part; the rare earth oxide is composed of CeO2 and Y2O3 in a mass ratio of 1:0.4. After testing, its acid corrosion resistance is 0.28g / (m 2 ·d), alkali corrosion resistance is 1.15g / (m 2 ·d), mechanical impact resistance is 0.343J.

[0032] Example 9 A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 52 parts, Al2O3 0.3 parts, CaO 3.3 parts, B2O3 4.2 parts, TiO2 1.8 parts, Co2O3 1.1 parts, Na2O 6.2 parts, Li2O 2.7 parts, K2O 1.4 parts, zircon tailings 2.2 parts, ZnO 4.1 parts, rare earth oxide 0.7 parts; rare earth oxide is composed of CeO2 and Y2O3 with a mass ratio of 1:0.2. After testing, its acid corrosion resistance is 0.26g / (m 2 ·d), alkali corrosion resistance is 1.08g / (m 2 ·d) Mechanical impact resistance is 0.335J.

[0033] Example 10 A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 53 parts, Al2O3 0.3 parts, CaO 4 parts, B2O3 4.2 parts, TiO2 1.4 parts, Co2O3 1 part, Na2O 6 parts, Li2O 2.5 parts, K2O 1.5 parts, zircon tailings 2 parts, ZnO 4.2 parts, rare earth oxide 1 part; the rare earth oxide is composed of CeO2 and Y2O3 in a mass ratio of 1:0.3. After testing, its acid corrosion resistance is 0.23g / (m 2 ·d), alkali corrosion resistance is 1.06g / (m 2 ·d) Mechanical impact resistance is 0.340J.

[0034] Comparative Example 1 A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 53 parts, Al2O3 0.3 parts, CaO 4 parts, B2O3 4.2 parts, TiO2 1.4 parts, Co2O3 1 part, Na2O 6 parts, Li2O 2.5 parts, K2O 1.5 parts, zircon tailings 2 parts, ZnO 0 parts, rare earth oxide 5.2 parts; rare earth oxide is composed of CeO2 and Y2O3 with a mass ratio of 1:0.3. After testing, its acid corrosion resistance is 0.47g / (m 2 ·d), alkali corrosion resistance is 1.69g / (m 2 ·d) Mechanical impact resistance is 0.328J.

[0035] Comparative Example 2 A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 53 parts, Al2O3 0.3 parts, CaO 4 parts, B2O3 4.2 parts, TiO2 1.4 parts, Co2O3 1 part, Na2O 6 parts, Li2O 2.5 parts, K2O 1.5 parts, zircon tailings 2 parts, ZnO 5.2 parts, rare earth oxide 0 parts. After testing, its acid corrosion resistance is 0.61g / (m 2 ·d), alkali corrosion resistance is 2.13g / (m 2 ·d), mechanical impact resistance is 0.276J.

[0036] Comparative Example 3 A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 53 parts, Al2O3 0.3 parts, CaO 4 parts, B2O3 4.2 parts, TiO2 1.4 parts, Co2O3 1 part, Na2O 6 parts, Li2O 2.5 parts, K2O 1.5 parts, zircon tailings 2 parts, ZnO 4.2 parts, rare earth oxide 1 part; the rare earth oxide is composed of La2O3 and Y2O3 in a mass ratio of 1:0.3. After testing, its acid corrosion resistance is 0.58g / (m 2 ·d), alkali corrosion resistance is 1.96g / (m 2 ·d), mechanical impact resistance is 0.295J.

[0037] Comparative Example 4 A high-strength, corrosion-resistant silicon-based material comprising the following components in parts by weight: SiO2 53 parts, Al2O3 0.3 parts, CaO 4 parts, B2O3 4.2 parts, TiO2 1.4 parts, Co2O3 1 part, Na2O 6 parts, Li2O 2.5 parts, K2O 1.5 parts, zircon tailings 2 parts, ZnO 4.2 parts, rare earth oxide 1 part; the rare earth oxide is composed of CeO2 and Y2O3 in a mass ratio of 1:1. After testing, its acid corrosion resistance is 0.43g / (m 2 ·d), alkali corrosion resistance is 1.64g / (m 2 ·d) Mechanical impact resistance is 0.316J.

[0038] As can be seen from the above examples, the addition of zinc oxide and rare earth oxides improves the density of the enamel coating. During corrosion, the corrosive solution is less likely to penetrate the interior of the enamel coating containing rare earth elements and other components. Furthermore, defects such as pores in the porcelain layer are reduced, resulting in improved density. The contact area between microparticles and the corrosive solution is reduced, and the amount of damage caused by corrosion is reduced. Furthermore, the porcelain particles are more compact, and the intermolecular cohesion is enhanced, reducing the likelihood of microcracks. Furthermore, the enamel coating with the addition of rare earth elements has a higher crystalline content, resulting in finer grains and improved fracture toughness. When subjected to stress, the flocculent structure in the coating buffers stress through elastic deformation, significantly improving the mechanical properties of the enamel material. Specifically, compared with Example 10, Comparative Examples 1 and 2, which lack either ZnO or rare earth oxides, have larger grain sizes, reduced density, and significantly decreased corrosion resistance. Comparative Example 3 replaces the rare earth cerium with the rare earth lanthanum. Due to differences in ionic radius and valence state, lanthanum cannot form a rare earth packing pattern with yttrium oxide with a different atomic radius, resulting in increased density and decreased porcelain layer performance. Comparative Example 4 proves that yttrium is a heavy rare earth, and its performance is quite different from that of cerium. When it is used in excessive amounts, the grain size increases, the gaps increase, and the negative effects on density and mechanics increase, resulting in reduced corrosion resistance and impact resistance of the porcelain layer.

[0039] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A high-strength, corrosion-resistant silicon-based material, characterized in that: In parts by weight, it contains the following ingredients: SiO2 50-55 parts, Al2O3 0.1-0.5 parts, CaO 2-6 parts, B2O3 2-6 parts, TiO2 0.8-2.5 parts, Co2O3 0.5-1.5 parts, Na2O+K2O+Li2O 5-15 parts, zircon tailings 1-3 parts, ZnO 3.5-5.5 parts, rare earth oxide 0.1-1.5 parts; The rare earth oxides are composed of CeO2 and Y2O3 in a mass ratio of 1: (0.1-0.5).

2. A high-strength, corrosion-resistant silicon-based material according to claim 1, characterized in that: Na2O is 4-8 parts, K2O is 0.5-3 parts, and Li2O is 0.5-4 parts.

3. The high-strength, corrosion-resistant silicon-based material according to claim 1, characterized in that: The zircon tailings contain, by weight percentage, the following: Al2O3 58-65%, SiO2 28-35%, Fe2O3 0.1-1%, Na2O 0.02-0.1%, ZrO2 0.5-1.5%, MgO 0.1-0.5%, CaO 0.05-0.15%, TiO2 1-2%, Cr2O3 0.01-0.12%, K2O 0.01-0.08%, and a loss on ignition of 0.1-0.5%.

4. The method for preparing a high-strength, corrosion-resistant silicon-based material according to claim 1, wherein: The steps include: (1) Weigh each component by weight; (2) First, calcining the zircon tailings, and then mixing and crushing the calcined zircon tailings with other raw materials to obtain a premix; (3) The premix is ​​melted at high temperature, the molten material is put into cold water for quenching, and then taken out and dried to obtain a high-strength, corrosion-resistant silicon-based material.

5. The method for preparing a high-strength, corrosion-resistant silicon-based material according to claim 4, wherein: The specific process of calcining the zircon tailings in step (2) is as follows: calcining the zircon tailings at a high temperature of 1100-1150° C., then quenching the zircon tailings in cold water, taking them out and drying them to obtain calcined zircon tailings.

6. The method for preparing a high-strength, corrosion-resistant silicon-based material according to claim 5, wherein: The drying temperature is 100-120° C., and the drying time is 0.5-1 h.

7. The method for preparing a high-strength, corrosion-resistant silicon-based material according to claim 4, wherein: The high-temperature melting temperature in step (3) is 1250°C-1450°C.

8. The method for preparing a high-strength, corrosion-resistant silicon-based material according to claim 4, wherein: The high-temperature melting time in step (3) is 1-2 hours.