High-performance calcium silicate building veneer and method of making same

Abstract

The present application relates to the field of calcium silicate veneer panel preparation, in particular to a high-performance calcium silicate building veneer panel and a preparation method thereof. The present application provides a calcium silicate veneer panel with a dense multi-layer composite structure formed by adding different chemical raw materials in layers. The innovative sound insulation material used is a microporous calcium silicate-serpentine fiber-polystyrene composite material. By adding polystyrene microspheres and serpentine fibers in a specific ratio to calcium silicate, a porous structure with excellent sound absorption effect is formed. This material not only has significant sound insulation performance, but also effectively improves the waterproofness, weather resistance and service life of the panel.

Description

Technical Field

[0001] This invention relates to the field of calcium silicate decorative panel preparation, specifically to a high-performance calcium silicate architectural decorative panel and its preparation method. Background Technology

[0002] Calcium silicate insulation material is a type of insulation material with hydrated calcium silicate as the main component and reinforced with fibers. Calcium silicate decorative panels are boards made primarily of calcium silicate, used for interior and exterior wall decoration in buildings. Calcium silicate decorative panels possess excellent thermal insulation properties, strong mechanical properties, and advantages such as light weight, low thermal conductivity, and high temperature resistance. Therefore, they are widely used in the construction industry, such as wall insulation boards, interior and exterior wall decorative panels, ceiling substrates, and floor substrates. With increasing requirements for building energy conservation and environmental protection, the demand for new building materials such as calcium silicate will further increase. However, currently produced calcium silicate decorative panels still have some functional defects, such as poor waterproof performance, poor sound insulation and absorption performance, poor weather resistance, and short service life.

[0003] Therefore, it is very necessary to invent a high-performance calcium silicate building decorative panel that is waterproof, sound-absorbing, weather-resistant, and has a long service life, and the finished product has a wide range of applications. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention aims to provide a high-performance calcium silicate building decorative panel and its preparation method. This method involves adding different chemical raw materials in layers and forming a dense multi-layered composite structure during heat treatment to obtain the high-performance calcium silicate building decorative panel. The waterproof performance, sound insulation and sound absorption performance, weather resistance, and service life of this calcium silicate decorative panel are significantly improved, making it suitable for high-end building decoration, sound insulation and heat insulation, and exterior wall protection.

[0005] This invention discloses a method for preparing a high-performance calcium silicate building decorative panel, comprising the following preparation steps:

[0006] S1: Calcium silicate and calcium fluoride are added to a high-temperature reactor and reacted under high-temperature conditions to generate a calcium silicate fluoride composite material;

[0007] S2: Add silica sand and gypsum quicklime to the mixer in sequence, then add water and polyacrylamide and stir to make calcium silicate slurry. Then add serpentine fiber that has been treated at high temperature and continue stirring. After stirring evenly, cool down and add polystyrene microspheres and chloroform to continue the reaction. Then concentrate and dry to obtain microporous calcium silicate-serpentine fiber-polystyrene composite material.

[0008] S3: Dissolve tetraethoxysilane in ethanol to obtain silica sol, then add aluminum chloride solution to silica sol to obtain a mixture, make the pH of the mixture 4, let it stand to gel, and after the gelation is completed, dry it to obtain dry gel, and sinter the dry gel at high temperature to obtain nano-modified silicate composite material.

[0009] S4: The fluorinated calcium silicate composite material obtained in step S1 is laid on the bottom of the mold and heated to solidify and form a waterproof layer. Then, the microporous calcium silicate-serpentine fiber-polystyrene composite material obtained in step S2 is laid on the waterproof layer and ultrasonic vibration is used to obtain an intermediate sound insulation and sound absorption layer. Finally, the nano-modified silicate composite material obtained in step S3 is coated on the intermediate sound insulation and sound absorption layer. After coating is completed, hot pressing, curing and cooling are performed to obtain a high-performance calcium silicate building decorative panel.

[0010] Preferably, in step S1, the reaction temperature of the high-temperature reacting aluminum is 1000-1500°C; and the mass ratio of calcium silicate to calcium fluoride is 1:(0.1-0.2).

[0011] Preferably, in step S2, the mass ratio of microporous calcium silicate, serpentine fiber and polystyrene is 1:(0.2-0.5):(0.2-0.3).

[0012] Preferably, in step S2, the temperature for the reaction to generate calcium silicate slurry is 100–150°C, and the time is 2–4 hours.

[0013] Preferably, in step S2, polystyrene microspheres and chloroform are added after the temperature is lowered to 50–70°C, and the reaction continues for 0.5–1 h.

[0014] Preferably, in step S3, the mass ratio of tetraethoxysilane to aluminum chloride is 1:(0.1-0.2).

[0015] Preferably, in step S3, the gelation time is 12–15 h.

[0016] Preferably, in step S3, the high-temperature sintering temperature is 700–900°C.

[0017] Preferably, in step S4, the thickness ratio of the calcium fluoride silicate composite material, the microporous calcium silicate-serpentine fiber-polystyrene composite material, and the nano-modified silicate composite material is 1:(5-7):(1-1.5).

[0018] A high-performance calcium silicate building decorative panel, which is prepared by any of the above-mentioned methods for preparing high-performance calcium silicate building decorative panels.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This invention provides a high-performance calcium silicate building decorative panel, which is prepared by hot pressing three layers: a waterproof layer, a middle sound insulation and sound absorption layer, and a weather-resistant layer. It is a high-performance calcium silicate building decorative panel with good waterproof and sound absorption properties, good weather resistance, and long service life, and has a wide range of applications.

[0021] The waterproof layer is composed of a calcium silicate fluoride composite material. This composite material controls the ratio of calcium fluoride to calcium silicate. Under high-temperature reaction, calcium fluoride alters the crystal structure of calcium silicate, forming a calcium silicate fluoride crystal structure, thus improving the material's waterproof performance, weather resistance, and high-temperature resistance. The intermediate sound-absorbing layer is composed of a microporous calcium silicate-serpentine fiber-polystyrene composite material. Calcium silicate forms its microporous structure through a chemical reaction at a certain temperature. Serpentine fiber is then added as a reinforcing phase, followed by polystyrene. Through the synergistic effect of different components, a porous composite material with uniform pore distribution is formed, effectively absorbing sound waves, reducing noise transmission, and providing strong sound insulation. The addition of polystyrene microspheres reduces the density of the composite material, making it lighter and easier to transport and install. The weather-resistant layer is composed of nano-modified silicate composite material. First, silicate ions are gelled through a condensation reaction to form a silica sol with a three-dimensional network structure. Then, aluminum chloride solution is added to allow aluminum ions to interact with silicate ions and generate an aluminum silicate composite. After high-temperature sintering, crystallization occurs, which makes the material form a more stable structure, thereby further improving the mechanical properties, thermal stability and corrosion resistance of the material.

[0022] By precisely controlling the temperature, pressure, and time during the molding process—comprising a waterproof layer, a middle sound-absorbing layer, and a weather-resistant layer—the calcium silicate decorative panel achieves a multi-layered composite structure with superior performance. The outer waterproof layer provides waterproof protection, the middle sound-absorbing layer effectively isolates noise, and the inner weather-resistant layer ensures the long-term stability and durability of the panel in harsh environments. This multifunctional composite material can be widely used in building walls, interior partitions, sound insulation panels, and other fields. Detailed Implementation

[0023] The following embodiments are provided to better understand the present invention and are not limited to the preferred embodiments described. They do not constitute a limitation on the content and scope of protection of the present invention. Any product that is the same as or similar to the present invention, derived by any person under the guidance of the present invention or by combining the features of the present invention with other prior art, falls within the protection scope of the present invention.

[0024] For experiments not specifically described in the examples, the procedures or conditions should be followed according to the conventional experimental procedures described in the literature in this field. Reagents or instruments whose manufacturers are not specified are all commercially available conventional reagent products.

[0025] Example 1: A method for preparing a high-performance calcium silicate architectural decorative panel, comprising the following steps:

[0026] Preparation of S1 fluorinated calcium silicate composite material: Calcium silicate and calcium fluoride are added to a high-temperature reactor and reacted at 1000℃ for 3 hours to generate fluorinated calcium silicate composite material; the mass ratio of calcium silicate to calcium fluoride is 1:0.1.

[0027] Preparation of S2 microporous calcium silicate-serpentine fiber-polystyrene composite material: Silica sand and gypsum quicklime were added sequentially to a mixer, followed by water and polyacrylamide. The mixture was heated to 100℃ and stirred for 2 hours to prepare a calcium silicate slurry. Then, serpentine fibers that had undergone high-temperature treatment were added and stirring continued. After stirring until uniform, the temperature was lowered to 50℃, and polystyrene microspheres and chloroform were added to continue the reaction for 0.5 hours. The mass ratio of microporous calcium silicate, serpentine fiber, and polystyrene was 1:0.2:0.2. The mixture was then concentrated and dried to obtain the microporous calcium silicate-serpentine fiber-polystyrene composite material.

[0028] Preparation of S3 nano-modified silicate composite material: Tetraethoxysilane was dissolved in ethanol to obtain silica sol, and then aluminum chloride solution was added to silica sol to obtain a mixture, wherein the mass ratio of tetraethoxysilane to aluminum chloride was 1:0.1. The pH of the mixture was adjusted to 4 and allowed to stand for gelation for 12 hours. After gelation was completed, it was dried to obtain dry gel. The dry gel was sintered at 700℃ to obtain nano-modified silicate composite material.

[0029] Preparation of S4 High-Performance Calcium Silicate Building Decorative Panels: The fluorinated calcium silicate composite material obtained in step S1 is laid on the bottom of a mold and heated to solidify and form a waterproof layer. Then, the microporous calcium silicate-serpentine fiber-polystyrene composite material obtained in step S2 is laid on the waterproof layer and ultrasonic vibration is used to obtain an intermediate sound-absorbing layer. Finally, the nano-modified silicate composite material obtained in step S3 is coated on the intermediate sound-absorbing layer. The thickness ratio of the fluorinated calcium silicate composite material, the microporous calcium silicate-serpentine fiber-polystyrene composite material, and the nano-modified silicate composite material is 1:5:1. After coating, hot pressing, curing, and cooling are performed to obtain the high-performance calcium silicate building decorative panel.

[0030] Example 2: A method for preparing a high-performance calcium silicate architectural decorative panel, comprising the following steps:

[0031] Preparation of S1 fluorinated calcium silicate composite material: Calcium silicate and calcium fluoride were added to a high-temperature reactor and reacted at 1100℃ for 3.2 h to generate fluorinated calcium silicate composite material; the mass ratio of calcium silicate to calcium fluoride was 1:0.1.

[0032] Preparation of S2 microporous calcium silicate-serpentine fiber-polystyrene composite material: Silica sand and gypsum quicklime were added sequentially to a mixer, followed by water and polyacrylamide. The mixture was heated to 110℃ and stirred for 2.5 hours to prepare a calcium silicate slurry. Then, serpentine fibers that had undergone high-temperature treatment were added and stirring continued. After stirring until uniform, the temperature was lowered to 55℃, and polystyrene microspheres and chloroform were added to continue the reaction for 0.6 hours. The mass ratio of microporous calcium silicate, serpentine fiber, and polystyrene was 1:0.2:0.2. The mixture was then concentrated and dried to obtain the microporous calcium silicate-serpentine fiber-polystyrene composite material.

[0033] Preparation of S3 nano-modified silicate composite material: Tetraethoxysilane was dissolved in ethanol to obtain silica sol, and then aluminum chloride solution was added to silica sol to obtain a mixture, wherein the mass ratio of tetraethoxysilane to aluminum chloride was 1:0.1. The pH of the mixture was adjusted to 4 and allowed to stand for gelation for 12.5 h. After gelation was completed, it was dried to obtain dry gel. The dry gel was sintered at 750℃ to obtain nano-modified silicate composite material.

[0034] Preparation of S4 High-Performance Calcium Silicate Building Decorative Panels: The fluorinated calcium silicate composite material obtained in step S1 is laid on the bottom of a mold and heated to solidify and form a waterproof layer. Then, the microporous calcium silicate-serpentine fiber-polystyrene composite material obtained in step S2 is laid on the waterproof layer and ultrasonic vibration is used to obtain an intermediate sound-absorbing layer. Finally, the nano-modified silicate composite material obtained in step S3 is coated on the intermediate sound-absorbing layer. The thickness ratio of the fluorinated calcium silicate composite material, the microporous calcium silicate-serpentine fiber-polystyrene composite material, and the nano-modified silicate composite material is 1:5:1. After coating, hot pressing, curing, and cooling are performed to obtain the high-performance calcium silicate building decorative panel.

[0035] Example 3: A method for preparing a high-performance calcium silicate architectural decorative panel, comprising the following steps:

[0036] Preparation of S1 fluorinated calcium silicate composite material: Calcium silicate and calcium fluoride are added to a high-temperature reactor and reacted at 1200℃ for 3.5h to generate fluorinated calcium silicate composite material; the mass ratio of calcium silicate to calcium fluoride is 1:0.1.

[0037] Preparation of S2 microporous calcium silicate-serpentine fiber-polystyrene composite material: Silica sand and gypsum quicklime were added sequentially to a mixer, followed by water and polyacrylamide. The mixture was heated to 120°C and stirred for 3 hours to prepare a calcium silicate slurry. Then, serpentine fibers that had undergone high-temperature treatment were added and stirring continued. After stirring until uniform, the temperature was lowered to 60°C, and polystyrene microspheres and chloroform were added to continue the reaction for 0.7 hours. The mass ratio of microporous calcium silicate, serpentine fiber, and polystyrene was 1:0.2:0.2. The mixture was then concentrated and dried to obtain the microporous calcium silicate-serpentine fiber-polystyrene composite material.

[0038] Preparation of S3 nano-modified silicate composite material: Tetraethoxysilane was dissolved in ethanol to obtain silica sol, and then aluminum chloride solution was added to silica sol to obtain a mixture, wherein the mass ratio of tetraethoxysilane to aluminum chloride was 1:0.1. The pH of the mixture was adjusted to 4 and allowed to stand for gelation for 13 hours. After gelation was completed, it was dried to obtain dry gel. The dry gel was sintered at 800℃ to obtain nano-modified silicate composite material.

[0039] Preparation of S4 High-Performance Calcium Silicate Building Decorative Panels: The fluorinated calcium silicate composite material obtained in step S1 is laid on the bottom of a mold and heated to solidify and form a waterproof layer. Then, the microporous calcium silicate-serpentine fiber-polystyrene composite material obtained in step S2 is laid on the waterproof layer and ultrasonic vibration is used to obtain an intermediate sound-absorbing layer. Finally, the nano-modified silicate composite material obtained in step S3 is coated on the intermediate sound-absorbing layer. The thickness ratio of the fluorinated calcium silicate composite material, the microporous calcium silicate-serpentine fiber-polystyrene composite material, and the nano-modified silicate composite material is 1:5:1. After coating, hot pressing, curing, and cooling are performed to obtain the high-performance calcium silicate building decorative panel.

[0040] Example 4: A method for preparing a high-performance calcium silicate architectural decorative panel, comprising the following steps:

[0041] Preparation of S1 fluorinated calcium silicate composite material: Calcium silicate and calcium fluoride were added to a high-temperature reactor and reacted at 1300℃ for 4 hours to generate fluorinated calcium silicate composite material; the mass ratio of calcium silicate to calcium fluoride was 1:0.1.

[0042] Preparation of S2 microporous calcium silicate-serpentine fiber-polystyrene composite material: Silica sand and gypsum quicklime were added sequentially to a mixer, followed by water and polyacrylamide. The mixture was heated to 130℃ and stirred for 3.5 hours to prepare a calcium silicate slurry. Then, serpentine fibers that had undergone high-temperature treatment were added and stirring continued. After stirring until uniform, the temperature was lowered to 65℃, and polystyrene microspheres and chloroform were added to continue the reaction for 0.8 hours. The mass ratio of microporous calcium silicate, serpentine fiber, and polystyrene was 1:0.2:0.2. The mixture was then concentrated and dried to obtain the microporous calcium silicate-serpentine fiber-polystyrene composite material.

[0043] Preparation of S3 nano-modified silicate composite material: Tetraethoxysilane was dissolved in ethanol to obtain silica sol, and then aluminum chloride solution was added to silica sol to obtain a mixture, wherein the mass ratio of tetraethoxysilane to aluminum chloride was 1:0.1. The pH of the mixture was adjusted to 4 and allowed to stand for gelation for 13.5 h. After gelation was completed, the mixture was dried to obtain dry gel. The dry gel was sintered at 850℃ to obtain nano-modified silicate composite material.

[0044] Preparation of S4 High-Performance Calcium Silicate Building Decorative Panels: The fluorinated calcium silicate composite material obtained in step S1 is laid on the bottom of a mold and heated to solidify and form a waterproof layer. Then, the microporous calcium silicate-serpentine fiber-polystyrene composite material obtained in step S2 is laid on the waterproof layer and ultrasonic vibration is used to obtain an intermediate sound-absorbing layer. Finally, the nano-modified silicate composite material obtained in step S3 is coated on the intermediate sound-absorbing layer. The thickness ratio of the fluorinated calcium silicate composite material, the microporous calcium silicate-serpentine fiber-polystyrene composite material, and the nano-modified silicate composite material is 1:5:1. After coating, hot pressing, curing, and cooling are performed to obtain the high-performance calcium silicate building decorative panel.

[0045] Example 5: A method for preparing a high-performance calcium silicate architectural decorative panel, comprising the following steps:

[0046] Preparation of S1 fluorinated calcium silicate composite material: Calcium silicate and calcium fluoride were added to a high-temperature reactor and reacted at 1400℃ for 4.5 h to generate fluorinated calcium silicate composite material; the mass ratio of calcium silicate to calcium fluoride was 1:0.1.

[0047] Preparation of S2 microporous calcium silicate-serpentine fiber-polystyrene composite material: Silica sand and gypsum quicklime were added sequentially to a mixer, followed by water and polyacrylamide. The mixture was heated to 140℃ and stirred for 4 hours to prepare a calcium silicate slurry. Then, serpentine fibers that had undergone high-temperature treatment were added and stirring continued. After stirring until uniform, the temperature was lowered to 70℃, and polystyrene microspheres and chloroform were added to continue the reaction for 0.9 hours. The mass ratio of microporous calcium silicate, serpentine fiber, and polystyrene was 1:0.2:0.2. The mixture was then concentrated and dried to obtain the microporous calcium silicate-serpentine fiber-polystyrene composite material.

[0048] Preparation of S3 nano-modified silicate composite material: Tetraethoxysilane was dissolved in ethanol to obtain silica sol, and then aluminum chloride solution was added to silica sol to obtain a mixture, wherein the mass ratio of tetraethoxysilane to aluminum chloride was 1:0.1. The pH of the mixture was adjusted to 4 and allowed to stand for gelation for 14 hours. After gelation was completed, it was dried to obtain dry gel. The dry gel was sintered at 900℃ to obtain nano-modified silicate composite material.

[0049] Preparation of S4 High-Performance Calcium Silicate Building Decorative Panels: The fluorinated calcium silicate composite material obtained in step S1 is laid on the bottom of a mold and heated to solidify and form a waterproof layer. Then, the microporous calcium silicate-serpentine fiber-polystyrene composite material obtained in step S2 is laid on the waterproof layer and ultrasonic vibration is used to obtain an intermediate sound-absorbing layer. Finally, the nano-modified silicate composite material obtained in step S3 is coated on the intermediate sound-absorbing layer. The thickness ratio of the fluorinated calcium silicate composite material, the microporous calcium silicate-serpentine fiber-polystyrene composite material, and the nano-modified silicate composite material is 1:5:1. After coating, hot pressing, curing, and cooling are performed to obtain the high-performance calcium silicate building decorative panel.

[0050] Example 6: A method for preparing a high-performance calcium silicate architectural decorative panel, comprising the following steps:

[0051] Preparation of S1 fluorinated calcium silicate composite material: Calcium silicate and calcium fluoride were added to a high-temperature reactor and reacted at 1500℃ for 5 hours to generate fluorinated calcium silicate composite material; the mass ratio of calcium silicate to calcium fluoride was 1:0.1.

[0052] Preparation of S2 microporous calcium silicate-serpentine fiber-polystyrene composite material: Silica sand and gypsum quicklime were added sequentially to a mixer, followed by water and polyacrylamide. The mixture was heated to 150℃ and stirred for 4 hours to prepare a calcium silicate slurry. Then, serpentine fibers that had undergone high-temperature treatment were added and stirring continued. After stirring until uniform, the temperature was lowered to 70℃, and polystyrene microspheres and chloroform were added to continue the reaction for 1 hour. The mass ratio of microporous calcium silicate, serpentine fiber, and polystyrene was 1:0.2:0.2. The mixture was then concentrated and dried to obtain the microporous calcium silicate-serpentine fiber-polystyrene composite material.

[0053] Preparation of S3 nano-modified silicate composite material: Tetraethoxysilane was dissolved in ethanol to obtain silica sol, and then aluminum chloride solution was added to silica sol to obtain a mixture, wherein the mass ratio of tetraethoxysilane to aluminum chloride was 1:0.1. The pH of the mixture was adjusted to 4 and allowed to stand for gelation for 15 hours. After gelation was completed, it was dried to obtain dry gel. The dry gel was sintered at 900℃ to obtain nano-modified silicate composite material.

[0054] Preparation of S4 High-Performance Calcium Silicate Building Decorative Panels: The fluorinated calcium silicate composite material obtained in step S1 is laid on the bottom of a mold and heated to solidify and form a waterproof layer. Then, the microporous calcium silicate-serpentine fiber-polystyrene composite material obtained in step S2 is laid on the waterproof layer and ultrasonic vibration is used to obtain an intermediate sound-absorbing layer. Finally, the nano-modified silicate composite material obtained in step S3 is coated on the intermediate sound-absorbing layer. The thickness ratio of the fluorinated calcium silicate composite material, the microporous calcium silicate-serpentine fiber-polystyrene composite material, and the nano-modified silicate composite material is 1:5:1. After coating, hot pressing, curing, and cooling are performed to obtain the high-performance calcium silicate building decorative panel.

[0055] The high-performance calcium silicate building veneer panels prepared in Examples 1-6 were subjected to performance testing. The test results are shown in the table below:

[0056]

[0057] The test data in the table above shows that the waterproof performance of high-performance calcium silicate building panels significantly improves with increasing preparation temperature of the S1 fluorinated calcium silicate composite material. However, further increases in preparation temperature beyond 1400℃ do not yield significant changes in waterproof performance. This trend indicates that at temperatures of 1400℃ and above, the density of the fluorinated calcium silicate composite material increases, thereby improving its waterproof performance.

[0058] In the preparation steps of the S3 nano-modified silicate composite material, the material exhibited the best weather resistance when the gelation time reached 14 hours and the high-temperature sintering temperature was 900℃. The change rate from 1.2% in Example 1 to 0.3% in Example 6 indicates that the higher preparation temperature and the application of the nano-modified silicate composite material improved its resistance to aging and environmental changes. The enhanced weather resistance of the material suggests that it can maintain its original performance for a longer period under harsh climatic conditions.

[0059] Example 7: A method for preparing a high-performance calcium silicate building decorative panel is the same as in Example 5, except that the mass ratio of calcium silicate to calcium fluoride in the preparation step of the S1 fluorinated calcium silicate composite material is changed. A high-performance calcium silicate building decorative panel with the corresponding mass ratio is prepared, and its waterproof performance is tested. The test results are shown in the table below:

[0060]

[0061] The test data in the table above shows that as the mass ratio of calcium silicate to calcium fluoride gradually increases from 1:0.1 to 1:0.2, the water resistance gradually improves. This increase in water resistance indicates that a higher proportion of calcium fluoride helps form a denser waterproof layer, enhancing the overall waterproofing capability of the board.

[0062] Example 8: A method for preparing a high-performance calcium silicate building veneer panel is the same as in Example 5, except that the mass ratio of microporous calcium silicate, serpentine fiber, and polystyrene in the preparation of the S2 microporous calcium silicate-serpentine fiber-polystyrene composite material is changed. High-performance calcium silicate building veneer panels with the corresponding mass ratio are prepared, and their sound insulation and absorption performance is tested. The test results are shown in the table below:

[0063]

[0064] As can be seen from the test data in the table above, the sound insulation and sound absorption properties are significantly improved as the proportion of serpentine fiber and polystyrene gradually increases.

[0065] Example 9: A method for preparing a high-performance calcium silicate building veneer panel is the same as in Example 5, except that the mass ratio of tetraethoxysilane to aluminum chloride in the preparation of S3 nano-modified silicate composite material is changed. High-performance calcium silicate building veneer panels with the corresponding mass ratio are prepared, and their weather resistance is tested. The test results are shown in the table below:

[0066]

[0067] The data in the table above shows that weather resistance improves with increasing aluminum chloride content. Tetraethoxysilane, as a silicon source, forms a robust network structure, enhancing the material's resistance to damp heat and providing good chemical stability. The addition of aluminum chloride helps form a more stable nanoscale silicate composite, which exhibits stronger UV resistance and damp heat resistance. With increasing aluminum chloride content, the chemical structure and surface properties of the composite material are further optimized, enhancing its anti-aging properties.

[0068] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for the production of high performance calcium silicate building facing panels, characterized in that, The method comprises the following steps: S1: adding calcium silicate and calcium fluoride into a high-temperature reaction furnace to generate a calcium silicate fluoride composite material under high-temperature conditions; S2: adding silica sand, gypsum and slaked lime into a mixer in sequence, then adding water and polyacrylamide to stir and mix uniformly to prepare a calcium silicate slurry, then adding serpentine fibers treated by high temperature to continue stirring, adding polystyrene microspheres and chloroform after the temperature is lowered to 50-70 DEG C to continue the reaction, and then concentrating and drying to obtain a microporous calcium silicate-serpentine fiber-polystyrene composite material; S3: dissolving tetraethoxysilane in ethanol to obtain a silica sol, then adding an aluminum chloride solution into the silica sol to obtain a mixed solution, adjusting the pH value of the mixed solution to 4, and standing and gelling, then drying to obtain a dry gel, and sintering the dry gel at high temperature to obtain a nano-modified silicate composite material; S4: laying the calcium silicate fluoride composite material obtained in S1 on the bottom of a mold, heating to solidify and form a waterproof layer, then laying the microporous calcium silicate-serpentine fiber-polystyrene composite material obtained in S2 on the waterproof layer to obtain an intermediate sound insulation and sound absorption layer by ultrasonic vibration, and finally coating the nano-modified silicate composite material obtained in S3 on the intermediate sound insulation and sound absorption layer, and then performing hot-pressing, curing and cooling to form a high-performance calcium silicate building veneer.

2. A method of preparing a high performance calcium silicate building veneer panel according to claim 1, characterised in that, In S1, the reaction temperature of the high-temperature reaction furnace is 1000-1500 DEG C; the mass ratio of the calcium silicate to the calcium fluoride is 1: (0.1-0.2).

3. The method for preparing a high-performance calcium silicate architectural decorative panel according to claim 1, characterized in that, In S2, the mass ratio of the microporous calcium silicate, the serpentine fiber and the polystyrene is 1: (0.2-0.5): (0.2-0.3).

4. The method for preparing a high-performance calcium silicate architectural decorative panel according to claim 1, characterized in that, In S2, the temperature for generating the calcium silicate slurry is 100-150 DEG C, and the time is 2-4 h.

5. The method for preparing a high-performance calcium silicate architectural decorative panel according to claim 1, characterized in that, In S2, the polystyrene microspheres and the chloroform are added after the temperature is lowered to 50-70 DEG C, and the reaction is continued for 0.5-1 h.

6. The method for preparing a high-performance calcium silicate architectural decorative panel according to claim 1, characterized in that, In S3, the mass ratio of the tetraethoxysilane to the aluminum chloride is 1: (0.1-0.2).

7. The method for preparing a high-performance calcium silicate architectural decorative panel according to claim 1, characterized in that, In S3, the gelling time is 12-15 h.

8. The method for preparing a high-performance calcium silicate architectural decorative panel according to claim 1, characterized in that, In S3, the high-temperature sintering temperature is 700-900 DEG C.

9. The method for preparing a high-performance calcium silicate architectural decorative panel according to claim 1, characterized in that, In S3, the laying thickness ratio of the calcium silicate fluoride composite material, the microporous calcium silicate-serpentine fiber-polystyrene composite material and the nano-modified silicate composite material is 1: (5-7): (1-1.5).

10. A high-performance calcium silicate building veneer prepared by the method according to any one of claims 1-9.

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