A crystalline silicon integrated inorganic superlattice thermal energy powder, a preparation method and application method thereof

Abstract

This application relates to the field of metal surface treatment materials, specifically disclosing a silicon-integrated inorganic supercrystalline thermal energy powder and its preparation and application methods. The silicon-integrated inorganic supercrystalline thermal energy powder comprises raw material A and raw material B. Raw material A includes the following: magnesium oxide, sodium fluoroaluminate, sodium polyphosphate, zinc oxide, crystalline tin tetrachloride, silicon dioxide, and boric acid. Raw material B includes the following raw materials in parts by weight: spodumene, lithium carbonate, titanium dioxide, zinc silicate, sodium carbonate, antimony trioxide, albite, fluorite, boric acid, sodium hydroxide, and yttrium oxide. The inorganic supercrystalline thermal energy powder of this application has advantages such as corrosion resistance and oxidation resistance, good thermal stability, no damage from thermal cycling, high hardness, wear resistance and high temperature resistance, energy saving, water scale reduction, and the ability to replace organosilicon high-temperature resistant special coatings, baking paints, enamel paints, and ceramic floor glazes.

Description

Technical Field

[0001] This application relates to the field of metal surface treatment materials, and more specifically, it relates to a crystalline silicon integrated inorganic supercrystalline thermal energy powder and its preparation and application methods. Background Technology

[0002] In recent years, corrosion prevention has risen from the level of avoiding economic losses to the level of low-carbon energy conservation and resource protection. Globally, corrosion causes more than US$2.2 trillion in losses every year. If effective protective measures are adopted, 25-40% of corrosion losses can be recovered each year. Corrosion problems of metals account for two-thirds of all corrosion prevention measures. Therefore, in-depth research and technological innovation in metal corrosion prevention are imperative.

[0003] Taking the petrochemical industry as an example, the investment in heat exchange equipment accounts for 40% of the total investment in plant construction. In actual use, the heat exchanger is exposed to a complex environment, such as high temperature environment, acid environment, and dusty gas environment. Therefore, problems such as high temperature oxidation, acid corrosion, wear, perforation, and dust accumulation are inevitable during use, which seriously affect the efficiency and life of the heat exchanger. As a result, tens of thousands of heat exchangers are scrapped every year due to corrosion and scaling.

[0004] To address the aforementioned problems, there are two main solutions: one is to use high-temperature and corrosion-resistant metal materials, and the other is to apply a protective treatment to the surface of the heat exchanger tubes. Due to economic reasons, most companies cannot afford expensive corrosion-resistant materials, so the second method is more commonly used. Applying anti-corrosion coatings is an important way to solve the corrosion problem of heat exchangers, offering advantages such as low cost, simple application, convenient maintenance and touch-up, and wide applicability.

[0005] Corrosion-resistant coatings include ceramic coatings and enamel coatings. Although ceramic coatings have a low oxygen diffusion coefficient, due to the significant difference in thermophysical properties between them and the metal substrate, and poor interfacial bonding, they are prone to peeling off along the interface between the coating and the substrate during thermal cycling. Furthermore, the thermal expansion coefficients of the coating and the substrate metal cannot be coordinated, resulting in inconsistent deformation between the coating and the substrate metal, which in turn causes cracks in the coating.

[0006] In the prior art, Chinese invention patent application document with application number CN 201310654081.2 discloses a preparation technology of nanocrystalline enamel. The method involves melting 30 parts of quartz sand, 22 parts of borax, 20 parts of feldspar powder, 10 parts of soda ash, 8 parts of sodium fluorosilicate, 12 parts of zirconium silicate, 8 parts of titanium dioxide, 5 parts of tricalcium phosphate, 3 parts of nickel oxide, and 2 parts of aluminum fluoride at 1300-1500℃ to prepare enamel frit. The homogeneous enamel frit is then mixed with a grinding material in the form of 92 parts of enamel frit, 7 parts of kaolin, and 1 part of bentonite, and mixed with 80-300 mesh enamel pre-grinding dry powder. This mixture is then coated onto the surface of a metal workpiece and fired at 760℃ to produce nanocrystalline enamel.

[0007] Although the above enamel coatings can undergo a chemical reaction with the base metal during sintering to achieve a tight bond at the interface, due to their own composition and crystallization process, it is difficult to achieve a thermal expansion coefficient that is suitable for different types or models of metals. Moreover, the above enamel glazes need to be crystallized at 720℃, which requires a relatively high glazing temperature. Summary of the Invention

[0008] In order to lower the crystallization temperature of the anti-corrosion coating and make it have a larger coefficient of linear expansion, so that it is suitable for the thermal expansion coefficients of different metals, this application provides a crystalline silicon integrated inorganic supercrystalline thermal energy powder and its preparation and application methods.

[0009] In a first aspect, this application provides an integrated crystalline silicon inorganic supercrystalline thermal energy powder, which adopts the following technical solution: an integrated crystalline silicon inorganic supercrystalline thermal energy powder, comprising raw material A and raw material B, wherein raw material A comprises the following parts by weight: 15.5-17.2 parts of magnesium oxide, 9.2-10.1 parts of sodium fluoroaluminate, 7.9-10 parts of sodium polyphosphate, 11-12 parts of zinc oxide, 7-7.5 parts of crystalline tin tetrachloride, 28-31 parts of silicon dioxide, and 22.7-24.5 parts of boric acid;

[0010] Raw material B comprises the following parts by weight: 10.5-11.7 parts spodumene, 2.8-3.6 parts lithium carbonate, 5.8-6.5 parts titanium dioxide, 4.5-5.2 parts zinc silicate, 4.86-5.3 parts sodium carbonate, 8.5-9.7 parts antimony trioxide, 17.8-19.1 parts albite, 12.7-13.5 parts fluorite, 21.8-22.7 parts boric acid, 4-4.5 parts sodium hydroxide, and 1.9-2.4 parts yttrium oxide.

[0011] Any small crack in the coating will reduce its corrosion resistance and may even accelerate corrosion. Therefore, the coefficient of thermal expansion of the coating must not be less than that of the base metal; otherwise, cracks will form in the coating. At the same time, the coefficient of thermal expansion of the coating should not be much larger than that of the base metal. This is because when the coefficient of thermal expansion of the coating is too large, a large in-plane compressive stress will be generated within the coating, leading to warping, instability, and peeling, resulting in a rapid decrease in the coating's corrosion resistance. To ensure a tight bond between the metal substrate and the anti-corrosion coating, the coefficients of thermal expansion of the metal substrate and the anti-corrosion coating need to be consistent. That is, the coefficient of thermal expansion of the coating needs to be equal to or appropriately greater than that of the metal substrate, changing with the coefficient of thermal expansion. This ensures that the coating does not crack at high temperatures and improves its corrosion resistance.

[0012] By adopting the above technical solution, reducing the silica content makes the glass network inside the formed glaze layer more firmly bonded, thereby increasing the expansion coefficient of the glaze layer. Spodumene in raw material B acts as a flux, with a wide melting temperature range, high high-temperature melt viscosity, and a rapid decrease in viscosity with increasing temperature. It also acts as a high-temperature thermoplasticizer and high-temperature binder, preventing high-temperature deformation of the coating and improving its drying strength. After melting, spodumene promotes the sintering of the crystal phase. Simultaneously, spodumene reacts with silica in raw material A to form a β-spodumene solid solution (Li₂OAl₂O₃·8SiO₂), which greatly eliminates the reduction in mechanical strength caused by coarse-grained fluorite or albite. The melting of albite... In its liquid state, no new crystalline phase is formed, and the liquid phase is very stable, exhibiting a strong fluxing effect. This enhances the chemical stability of the coating. Its low viscosity at high temperatures makes it prone to product deformation during firing, which is beneficial for forming a smooth and even glaze surface. The decomposition of lithium carbonate in raw material B forms LiO2, which facilitates the formation of several eutectic compounds, lowering the melting point and firing temperature of the powder. This allows the generated H2 to escape from the molten glaze layer, reducing the formation of bubbles and pinholes on the glaze surface. The Li-containing inorganic supercrystalline thermal energy powder can increase the thermal expansion coefficient of the glaze layer, promoting the wetting of the metal surface without affecting the acid resistance, surface gloss, or fineness of the glaze layer. It can further increase the thermal stability, toughness, and impact strength of the glaze layer.

[0013] Adding nano-sized silica and antimony trioxide to raw material A, as oxide particles, enhances the adhesion between the glaze layer and the metal substrate. Furthermore, nano-sized silica and antimony trioxide exhibit quantum size effects, quantum surface effects, and quantum tunneling effects. When mixed with other materials for sintering and glazing, they improve the dispersibility and uniformity of the raw materials. After the glaze layer is formed, the nanoparticles achieve a larger specific surface area and a porous three-dimensional microstructure, effectively absorbing and distributing more external impact energy, preventing the generation or propagation of glaze cracks, and significantly improving the toughness of the glaze layer. This overcomes the risk of breakage due to collisions during transportation. The defects of cracking; magnesium oxide (MgO) can increase the melting temperature range of inorganic supercrystalline thermal energy powder at high temperatures, which can increase the whiteness of the glaze and prevent glaze cracking. Zinc oxide can increase the fluidity of the glaze slurry, reduce the pre-firing shrinkage of the glaze, and prevent glaze shrinkage. Thus, the coefficient of thermal expansion can be coordinated with various base metals. For metals such as iron, steel, copper, copper alloys, aluminum, aluminum alloys, magnesium, and magnesium alloys, the base metal oxides will penetrate into the coating, thereby adjusting the coefficient of thermal expansion of the coating. This makes the coating applicable to a variety of metals and has universality.

[0014] Optionally, raw material A comprises the following parts by weight: 16.1-16.53 parts magnesium oxide, 9.84-9.9 parts sodium fluoroaluminate, 8.92-9.1 parts sodium polyphosphate, 11.26-11.7 parts zinc oxide, 7.23-7.4 parts crystalline tin tetrachloride, 29.8-30.2 parts silicon dioxide, and 23.7-24.1 parts boric acid;

[0015] Raw material B comprises the following parts by weight: 11.2-11.4 parts spodumene, 3.26-3.4 parts lithium carbonate, 6.13-6.3 parts titanium dioxide, 4.92-5.0 parts zinc silicate, 5.12-5.2 parts sodium carbonate, 8.92-9.2 parts antimony trioxide, 18.6-18.8 parts albite, 13.2-13.4 parts fluorite, 22.3-22.5 parts boric acid, 4.16-4.3 parts sodium hydroxide, and 2.1-2.3 parts yttrium oxide.

[0016] By adopting the above technical solution, the inorganic supercrystalline thermal energy powder made from the above amounts of raw material A and raw material B has a large coefficient of thermal expansion and can be applied to various metal matrices.

[0017] Optionally, the mass ratio of raw material A to raw material B is 4.4-4.8:5.2-5.6.

[0018] By adopting the above technical solution, raw material A and raw material B are mixed in a certain mass ratio to produce inorganic supercrystalline thermal energy powder. After sintering, the powder is solidified to form a glaze layer with a large coefficient of thermal expansion, which can be tightly bonded to various metal substrates, play a role in corrosion prevention, and extend the service life of the metal substrate.

[0019] Optionally, the particle size of the integrated crystalline silicon inorganic supercrystalline thermal energy powder is 325-425 mesh.

[0020] By adopting the above technical solution, the inorganic supercrystalline thermal energy powder with reduced particle size can, on the one hand, facilitate the uniform and firm deposition of coating powder on the metal substrate, so as to make the prepared coating thickness more uniform, and on the other hand, make the inorganic supercrystalline thermal energy powder more uniform and dense during the later firing process, thereby further reducing the possibility of coating cracking.

[0021] Secondly, this application provides a method for preparing an integrated crystalline silicon inorganic supercrystalline thermal energy powder, employing the following technical solution:

[0022] A method for preparing a silicon-integrated inorganic supercrystalline thermal energy powder includes the following steps:

[0023] Preparation of raw material A: According to the amount of raw material, stir the raw material evenly, heat it to 960-980℃, keep it at that temperature for 25-30 minutes, cool, crush and grind it, add it to the ethanol solution, co-precipitate it, dry it and grind it to obtain raw material A;

[0024] Preparation of raw material B: According to the amount of raw material, stir the raw material evenly, heat it to 1150-1200℃ to melt it into a liquid state, pour it into pure water at a uniform speed, soak for 120-130 minutes, dry and grind to obtain raw material B;

[0025] Preparation of crystalline silicon integrated inorganic supercrystalline thermal energy powder: Raw material A and raw material B are stirred in a certain proportion for 10-15 minutes, heated to 960-980℃, heat-treated for 50-60 minutes, cooled to 200℃ and then crushed and ground.

[0026] By adopting the above technical solution, raw material A is co-precipitated after heat treatment to obtain composite oxide ultrafine powder. Raw material B undergoes a rapid high-temperature chemical reaction with each other, which accelerates the melting of the raw material into a liquid. After melting, it is water-quenched to carry out a continuous reaction from high temperature to low temperature. Through heat exchange, the product's permeability is enhanced, and the linear expansion coefficient of raw material B is expanded to be close to that of metal.

[0027] Optionally, the heating process during the preparation of raw material A is as follows: heating from room temperature to 300℃ in 50-55 minutes, holding for 30-35 minutes, heating to 500℃ in 25-30 minutes, holding for 30 minutes, heating to 750℃ in 35-40 minutes, holding for 20-25 minutes, and then heating to 960-980℃ in 50-55 minutes, holding for 60-65 minutes.

[0028] Optionally, the liquid raw material B is poured into the purified water at a flow rate of 30-50 seconds.

[0029] By adopting the above technical solution, liquid raw material B is added to pure water at a uniform rate, and the coefficient of thermal expansion can be adjusted through stable hot and cold cycles.

[0030] Optionally, the heating process for the heat treatment of the integrated silicon inorganic supercrystalline thermal energy powder is as follows: heating to 300°C in 50-55 minutes, heating to 500°C in 25-30 minutes, heating to 750°C in 30-35 minutes, and heating to 960-980°C in 50-60 minutes.

[0031] Secondly, this application provides a method for applying an integrated silicon inorganic supercrystalline thermal energy powder, employing the following technical solution:

[0032] A method for applying a silicon-integrated inorganic supercrystalline thermal energy powder includes the following steps:

[0033] The crystalline silicon integrated inorganic supercrystalline thermal energy powder is mixed with water to prepare a glaze slurry with a concentration of 35-45wt%.

[0034] The metal substrate is heat-treated at 600-1000℃ for 30-60 minutes. The glaze is then sprayed or brushed onto the heat-treated metal substrate and cured at 300-340℃ for 2-3 minutes to form a glaze layer.

[0035] By adopting the above technical solution, during the heat treatment of the metal substrate, the deformed structure within the metal substrate gradually recrystallizes, forming irregular grains. As the heat treatment time increases, the grains gradually grow until the grain size change is not significant. The numerous grain boundaries between the fine grains result in high system energy. The recrystallized grains consume this energy and grow by merging or large grains engulfing small grains. When the excess grain boundaries, defects, and dislocations are consumed, the defects in the metal substrate are reduced or eliminated, residual stress in the metal substrate is eliminated, and deformation and cracking are prevented. This adjusts the hardness, strength, plasticity, and toughness of the workpiece. After the glaze is sprayed or brushed onto the metal substrate, it is cured at 300-340℃ for a short time. The inorganic supercrystalline thermal energy powder crystallizes, and under the action of heat and air, the crystallized glaze layer is thermoset into an integrated structure. This allows the metal substrate and the glaze to form an integrated structure with strong and reliable adhesion, high hardness, smooth and beautiful appearance, and durability.

[0036] Optionally, the thickness of the glaze layer is 0.5-1 mm.

[0037] By adopting the above technical solution, this thickness of glaze on the metal substrate can effectively prevent the metal substrate from being corroded, and the glaze is not easy to break or crack.

[0038] In summary, this application has the following beneficial effects:

[0039] 1. The inorganic supercrystalline thermal energy powder of this application forms a glaze layer through crystallization at 300-340℃, with a linear expansion coefficient of 1×10⁻⁶. -7 With a temperature above ℃, the heat treatment curing time is short and basically synchronized with the metal expansion coefficient. Its thermal and cold cycles are synchronized with the metal, resulting in a robust integrated structure that does not crack or pulverize with long-term use. It has a long service life and fills the gap in the synchronous integration of metals and non-metals. It is currently an ideal product for anti-oxidation and corrosion, anti-aging, anti-scaling, and energy-saving and consumption-reducing applications in military, aerospace, household, steel, and metallurgical fields, generating good social and economic benefits for mankind.

[0040] 2. The inorganic supercrystalline thermal energy powder in this application has good thermal stability, no damage from thermal cycling, high hardness, strong structural strength, wear resistance, energy saving, corrosion resistance, hygiene and environmental protection, durability, and can withstand high temperatures of 1050℃ without change in the glaze layer. It has a fast curing speed and can replace organosilicon high-temperature resistant special coatings and automotive paint. It can also be used in non-stick pans and water heater heating elements, which have the functions of energy saving, waterproofing, water quality improvement, corrosion protection and oxidation resistance of high-temperature equipment. It solves the problem of the integrated structure of metal and inorganic crystallized glaze and is currently the ideal product for the integration of metal and stainless steel devices with inorganic crystallized glaze structure.

[0041] 3. The inorganic supercrystalline thermal powder in this application can be glazed using processes such as electrostatic spraying, water-based glaze spraying, brushing, and spraying. The glazing temperature is low, which allows the stainless steel surface layer to form an integrated structure with the inorganic glaze, resulting in a strong and reliable bond.

[0042] With high hardness, smooth and beautiful finish, energy saving and consumption reduction, no impact on water quality, excellent anti-scaling performance, and durability, it is currently the ideal product for energy saving and descaling. Detailed Implementation

[0043] Example

[0044] Example 1: A crystalline silicon integrated inorganic supercrystalline thermal energy powder with a particle size of 325 mesh, comprising raw material A and raw material B in percentages of 46% and 54%, respectively. Raw material A comprises the following parts by weight (kg): 16.53 parts magnesium oxide, 9.84 parts sodium fluoroaluminate, 8.92 parts ammonium polyphosphate, 11.26 parts zinc oxide, 7.23 parts crystalline tin tetrachloride, 29.8 parts silicon dioxide, and 23.7 parts boric acid;

[0045] Raw material B comprises the following parts by weight (kg): 11.2 parts spodumene, 3.26 parts lithium carbonate, 6.13 parts titanium dioxide, 4.92 parts zinc silicate, 5.12 parts sodium carbonate, 8.92 parts antimony trioxide, 18.6 parts albite, 13.2 parts fluorite, 22.3 parts boric acid, 4.16 parts sodium hydroxide, and 2.1 parts yttrium oxide.

[0046] The preparation method of the above-mentioned silicon-integrated inorganic supercrystalline thermal energy powder includes the following steps:

[0047] Preparation of raw material A: According to the amount of raw material A, mix all raw materials, stir evenly, heat to 960℃, hold for 30 min, cool with the furnace, take out the raw material and cool, crush, grind, pass through a 200-mesh sieve, add to ethanol solution, stir for 5 min for co-precipitation treatment, dry and grind to 325 mesh. The heating curve is as follows: first, heat from room temperature to 300℃ in 50 min, hold for 35 min, then heat to 500℃ in 25 min, hold for 30 min, then heat to 750℃ in 35 min, hold for 20 min, and then heat to 960℃ in 55 min.

[0048] Preparation of raw material B: According to the amount of raw material B, mix all raw materials, stir evenly, and heat to 1150℃. The high temperature causes raw material B to crystallize completely and form a liquid. Then, pour the liquid raw material B into pure water at room temperature at a flow rate of 30 seconds. After soaking for 120 minutes, dry and grind to 200 mesh to obtain raw material B.

[0049] Preparation of crystalline silicon integrated inorganic supercrystalline thermal energy powder: Raw material A and raw material B are mixed and stirred at a ratio of 46% and 54% for 15 minutes, heated to 960℃, heat-treated for 60 minutes, cooled to 200℃, crushed and ground, and passed through a 325-mesh sieve to obtain the product powder. The heat treatment heating process is as follows: heat to 300℃ in 50 minutes, heat to 500℃ in 25 minutes, heat to 750℃ in 35 minutes, and heat to 960℃ in 55 minutes.

[0050] Example 2: A silicon-integrated inorganic supercrystalline thermal energy powder with a particle size of 325 mesh, comprising 46% by weight of raw material A and 54% by weight of raw material B. Raw material A comprises the following parts by weight (kg): 16.1 parts magnesium oxide, 9.9 parts sodium fluoroaluminate, 9.1 parts ammonium polyphosphate, 11.7 parts zinc oxide, 7.4 parts crystalline tin tetrachloride, 30.2 parts silicon dioxide, and 24.1 parts boric acid;

[0051] Raw material B comprises the following parts by weight (kg): 11.4 parts spodumene, 3.4 parts lithium carbonate, 6.3 parts titanium dioxide, 5.0 parts zinc silicate, 5.2 parts sodium carbonate, 9.2 parts antimony trioxide, 18.8 parts albite, 13.4 parts fluorite, 22.5 parts boric acid, 4.3 parts sodium hydroxide, and 2.3 parts yttrium oxide.

[0052] The preparation method of the integrated crystalline silicon inorganic supercrystalline thermal energy powder is the same as that in Example 1.

[0053] Example 3: A silicon-integrated inorganic supercrystalline thermal energy powder with a particle size of 325 mesh, comprising 46% by weight of raw material A and 54% by weight of raw material B. Raw material A comprises the following parts by weight (kg): 15.5 parts magnesium oxide, 9.2 parts sodium fluoroaluminate, 7.9 parts ammonium polyphosphate, 11.0 parts zinc oxide, 7.0 parts crystalline tin tetrachloride, 28 parts silicon dioxide, and 22.7 parts boric acid;

[0054] Raw material B comprises the following parts by weight (kg): 10.5 parts spodumene, 2.8 parts lithium carbonate, 5.8 parts titanium dioxide, 4.5 parts zinc silicate, 4.86 parts sodium carbonate, 8.5 parts antimony trioxide, 17.8 parts albite, 12.7 parts fluorite, 21.8 parts boric acid, 4.0 parts sodium hydroxide, and 1.9 parts yttrium oxide.

[0055] The preparation method of the above-mentioned integrated crystalline silicon inorganic supercrystalline thermal energy powder is the same as that in Example 1.

[0056] Example 4: A silicon-integrated inorganic supercrystalline thermal energy powder with a particle size of 325 mesh, comprising 46% by weight of raw material A and 54% by weight of raw material B. Raw material A comprises the following parts by weight (kg): 17.2 parts magnesium oxide, 10.1 parts sodium fluoroaluminate, 10 parts ammonium polyphosphate, 12 parts zinc oxide, 7.5 parts crystalline tin tetrachloride, 31 parts silicon dioxide, and 24.5 parts boric acid;

[0057] Raw material B comprises the following parts by weight (kg): 11.7 parts spodumene, 3.6 parts lithium carbonate, 6.5 parts titanium dioxide, 5.2 parts zinc silicate, 5.3 parts sodium carbonate, 9.7 parts antimony trioxide, 19.1 parts albite, 13.5 parts fluorite, 22.7 parts boric acid, 4.5 parts sodium hydroxide, and 2.4 parts yttrium oxide.

[0058] The preparation method of the above-mentioned integrated crystalline silicon inorganic supercrystalline thermal energy powder is the same as that in Example 1.

[0059] Application examples

[0060] Application Example 1: The crystalline silicon integrated inorganic supercrystalline thermal energy powder prepared in Example 1 was mixed with water to prepare a glaze slurry with a concentration of 40 wt%.

[0061] The metal substrate to be coated (heating tube of a water heater, made of Q235 carbon steel, with a power of 2000w and a diameter of 220mm) was polished, cleaned, and the oxides, grease, and dust on the surface were removed. Then, the temperature was raised to 600℃ and held for 40 minutes. The prepared glaze was then sprayed onto the heated metal substrate using electrostatic spraying. It was cured at 320℃ for 2 minutes to form a glaze layer with a thickness of 1mm, thus obtaining the sample of Application Example 1. During electrostatic spraying, the glaze flow rate pressure was 0.4MPa, the atomization pressure was 0.3MPa, and the distance from the spray gun nozzle to the metal substrate was 200mm.

[0062] Application Examples 2-4: The difference from Application Example 1 is that the silicon-integrated inorganic supercrystalline thermal energy powder prepared in Examples 2-4 is used respectively.

[0063] Application Example 5: The difference from Application Example 1 is that the metal substrate to be sprayed is cast iron with a carbon content greater than 2.11%.

[0064] Application Example 6: The difference from Application Example 1 is that the metal substrate to be sprayed is pure copper.

[0065] Application Example 7: The difference from Application Example 1 is that the metal substrate to be coated is pure aluminum.

[0066] Performance testing

[0067] I. Performance testing of supercrystalline thermal energy powder: The supercrystalline thermal energy powders prepared in Examples 1-7 were subjected to the following performance tests, and the test results are recorded in Table 1.

[0068] 1. Specific gravity: Tested using a BOS-120A density tester.

[0069] 2. Dielectric loss angle: Tested in accordance with GB / T5594.4-2005 "Test methods for the performance of structural ceramic materials for electronic components - Part 4: Dielectric constant and dielectric loss angle".

[0070] 3. Coefficient of linear expansion: Tested in accordance with GB / T5594.3-2015 "Test methods for performance of structural ceramic materials for electronic components - Part 3: Test method for average coefficient of linear expansion".

[0071] 4. Thermal spray melting point: The softening temperature of the supercrystalline thermal energy powder when it is directly and locally heated by a gas flame such as an oxy-acetylene flame.

[0072] 5. Softening Point: The method is performed according to JIS R2204-1999 "Test Method for Refractoriness of Refractory Materials and Raw Materials". The above powder is formed into a test cone. The test cone is heated, and then the temperature at which its tip begins to contact the cradle is measured. This temperature is defined as the "softening point" of the cone or glaze.

[0073] Table 1 Performance testing of supercrystalline thermal energy powder

[0074]

[0075] The test results above show that a glaze layer is formed after curing at 300-340℃ for 2-3 minutes. The glazing temperature is low, the curing speed is fast, the heat resistance is good, and the glaze layer has good toughness, strong thermal stability, and a large coefficient of linear expansion, which is basically synchronized with the metal. It can be applied to different types and models of metals.

[0076] II. Performance testing of glaze formed by supercrystalline thermal powder: The following methods were used to test the samples prepared in cases 1-7, and the test results were recorded in Table 2.

[0077] 1. Acid corrosion resistance: The sample prepared in the application example is boiled in 10% H2SO4 solution for 24 hours, then dried at 40°C. The mass change of the sample before and after corrosion is measured, and the acid corrosion loss is calculated.

[0078] 2. Flexural strength: Tested using the single-sided notch method.

[0079] 3. Resistance to hot water corrosion: Tested according to 4.5 resistance to hot water corrosion in GB / T2590-2003 "Enamel Components for Storage Water Heaters".

[0080] 4. Alkali corrosion resistance: Tested according to 4.6 alkali corrosion resistance in GB / T2590-2003 "Enamel Components for Storage Water Heaters".

[0081] 5. Adhesion: Withstands 2000g / cm² 2 Does it crack after the impact?

[0082] 6. Seismic stability: The sample from Application Example 1 was placed in a muffle furnace at 210°C and kept at that temperature for 20 minutes. It was then removed and immersed in room temperature water within 5 seconds. After 5 cycles, the coating was observed to see if cracking, peeling, or other phenomena occurred.

[0083] 7. Thermal conductivity: Tested in accordance with GB / T39862-2021 "Test of thermal conductivity of high thermal conductivity ceramics".

[0084] 8. Compressive strength: Tested in accordance with GB / T4740-1999 "Test Method for Compressive Strength of Ceramic Materials".

[0085] Table 2 Performance testing of glazes formed from supercrystalline thermal energy powder

[0086]

[0087] The inorganic supercrystalline thermal energy powder of this application forms a glaze layer with good stability after crystallization, no damage from thermal cycling, high hardness, wear resistance, high temperature resistance, and a smooth and beautiful finish. It replaces baking paint, enamel glaze, and ceramic floor glaze, and solves the problems of large metal expansion coefficient, asynchronous expansion with non-metallic materials, low glaze toughness, and easy damage.

[0088] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A silicon-integrated inorganic supercrystalline thermal energy powder, characterized in that, The product comprises two raw materials, A and B. Raw material A includes the following parts by weight: 15.5-17.2 parts magnesium oxide, 9.2-10.1 parts sodium fluoroaluminate, 7.9-10 parts sodium polyphosphate, 11-12 parts zinc oxide, 7-7.5 parts crystalline tin tetrachloride, 28-31 parts silicon dioxide, and 22.7-24.5 parts boric acid. Raw material B includes the following parts by weight: 10.5-11.7 parts spodumene, 2.8-3.6 parts lithium carbonate, 5.8-6.5 parts titanium dioxide, 4.5-5.2 parts zinc silicate, 4.86-5.3 parts sodium carbonate, 8.5-9.7 parts antimony trioxide, 17.8-19.1 parts albite, 12.7-13.5 parts fluorite, 21.8-22.7 parts boric acid, 4-4.5 parts sodium hydroxide, and 1.9-2.4 parts yttrium oxide. The aforementioned integrated silicon inorganic supercrystalline thermal energy powder is prepared by a method comprising the following steps: Preparation of raw material A: According to the amount of raw material, stir the raw material evenly, heat it to 960-980℃, keep it at that temperature for 25-30 minutes, cool, crush and grind it, add it to the ethanol solution, co-precipitate it, dry it and grind it to obtain raw material A; Preparation of raw material B: According to the amount of raw material, stir the raw material evenly, heat it to 1150-1200℃ to melt it into a liquid state, pour it into pure water at a uniform speed, soak for 120-130 minutes, dry and grind to obtain raw material B; Preparation of crystalline silicon integrated inorganic supercrystalline thermal energy powder: Raw material A and raw material B are stirred in a certain proportion for 10-15 minutes, heated to 960-980℃, heat-treated for 50-60 minutes, cooled to 200℃ and then crushed and ground. The heating process for preparing raw material A is as follows: heating from room temperature to 300℃ in 50-55 minutes, holding for 30-35 minutes, heating to 500℃ in 25-30 minutes, holding for 30 minutes, heating to 750℃ in 35-40 minutes, holding for 20-25 minutes, and then heating to 960-980℃ in 50-55 minutes, holding for 60-65 minutes. The heating process for the heat treatment of the integrated silicon inorganic supercrystalline thermal energy powder is as follows: heating to 300℃ in 50-55 minutes, heating to 500℃ in 25-30 minutes, heating to 750℃ in 30-35 minutes, and heating to 960-980℃ in 50-60 minutes.

2. The silicon-integrated inorganic supercrystalline thermal energy powder according to claim 1, characterized in that, Raw material A comprises the following parts by weight: 16.1-16.53 parts magnesium oxide, 9.84-9.9 parts sodium fluoroaluminate, 8.92-9.1 parts sodium polyphosphate, 11.26-11.7 parts zinc oxide, 7.23-7.4 parts crystalline tin tetrachloride, 29.8-30.2 parts silicon dioxide, and 23.7-24.1 parts boric acid; Raw material B comprises the following parts by weight: 11.2-11.4 parts spodumene, 3.26-3.4 parts lithium carbonate, 6.13-6.3 parts titanium dioxide, 4.92-5.0 parts zinc silicate, 5.12-5.2 parts sodium carbonate, 8.92-9.2 parts antimony trioxide, 18.6-18.8 parts albite, 13.2-13.4 parts fluorite, 22.3-22.5 parts boric acid, 4.16-4.3 parts sodium hydroxide, and 2.1-2.3 parts yttrium oxide.

3. The silicon-integrated inorganic supercrystalline thermal energy powder according to claim 1, characterized in that, The mass ratio of raw material A to raw material B is 4.4-4.8:5.2-5.

6.

4. The silicon-integrated inorganic supercrystalline thermal energy powder according to claim 1, characterized in that, The particle size of the integrated crystalline silicon inorganic supercrystalline thermal energy powder is 325-425 mesh.

5. The silicon-integrated inorganic supercrystalline thermal energy powder according to claim 1, characterized in that, The liquid raw material B is poured into the purified water at a flow rate of 30-50 seconds.

6. The method of applying the integrated crystalline silicon inorganic supercrystalline thermal energy powder according to any one of claims 1-5, characterized in that, Includes the following steps: The crystalline silicon integrated inorganic supercrystalline thermal energy powder is mixed with water to prepare a glaze slurry with a concentration of 35-45wt%. The metal substrate is heat-treated at 600-1000℃ for 30-60 minutes. The glaze is then sprayed or brushed onto the heat-treated metal substrate and cured at 300-340℃ for 2-3 minutes to form a glaze layer.

7. The application method of the integrated crystalline silicon inorganic supercrystalline thermal energy powder according to claim 6, characterized in that, The thickness of the glaze layer is 0.5-1mm.

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