A mirror-finish high-gloss hot-bending slab and its preparation method

Abstract

This invention discloses a mirror-finish high-gloss hot-bending slab and its preparation method, belonging to the field of building materials technology. By optimizing the glaze composition, the glaze surface becomes more stable during firing and hot bending, free from defects. Furthermore, the interaction between frit A and frit B makes the glaze surface denser, achieving a mirror-finish high-gloss effect. In addition, the addition of modified mica powder and modified glass powder provides excellent compatibility, resulting in better toughness and thermal stability during firing and hot bending. This effectively resists glaze cracking caused by mismatch between body and glaze stress or deformation stress, ensuring a mirror-finish effect. Overall, the glaze layer undergoes plastic deformation synchronously and continuously with the body, without defects such as orange peel, cracks, or blistering. Combined with segmented hot bending, the resulting hot-bent slab product maintains a complete, smooth, high-gloss, and color-stable glaze surface even on curved surfaces.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, and more specifically, to a mirror-gloss hot-bending slab and its preparation method. Background Technology

[0002] As a new type of decorative material, sintered stone is widely used in homes, commercial spaces, and other fields. With the diversification of design needs, hot-bent sintered stone is favored by the market because it can achieve curved shapes. However, in the hot-bending process of existing transparent glazed sintered stone, the hot-bending temperature is usually lower than the original firing temperature, and it requires long-term heat preservation and slow cooling, which easily leads to a decrease in the gloss of the glaze, seriously affecting the aesthetics and performance of the product.

[0003] In existing technologies, transparent glazes are mostly composed of conventional ingredients. During the high-temperature holding stage of hot bending, crystal growth easily occurs, leading to glaze crystallization and reduced gloss, thus affecting the appearance of the slab products. Although a high-silicon, low-alumina, high-zinc transparent glaze system can alleviate the crystallization problem to some extent because it is in a fully vitrified state at the highest point of hot bending and has low viscosity, resulting in slower crystal growth, it still cannot fully meet the requirements for a mirror-like high-gloss effect. There are also many high-gloss products in existing technologies. For example, Chinese patent application number CN202510586539.8 discloses a high-strength, high-gloss daily-use ceramic and its preparation method, comprising the following raw materials in parts by weight: 35-45 parts mullite, 15-20 parts spodumene, 10-15 parts quartz, 8-12 parts barium carbonate modifier, 5-8 parts boron oxide additive, and 7-11 parts yttrium-zinc compounding agent. This solution achieves a balanced and coordinated improvement in the antibacterial properties, gloss, and strength of the daily-use ceramic. For example, Chinese patent application CN202411603617.2 discloses a high-gloss ceramic and its preparation method, including the following steps: 35-45 parts of kaolin, 20-25 parts of illite, 10-15 parts of dolomite, 8-12 parts of talc powder, and 6-10 parts of potassium feldspar are mixed and ball-milled, then passed through a 250-mesh sieve to obtain a mixture. The glaze is then applied to the ceramic body, followed by medium-temperature sintering. After sintering, the high-gloss ceramic is obtained. The ceramic product obtained by this method has high gloss and good flexural strength, while also exhibiting significant acid and alkali resistance. However, it still fails to solve the problem of gloss reduction after hot bending treatment.

[0004] Therefore, it is necessary to further improve the glaze of hot-bent slabs to further suppress crystallization during the hot bending process, maintain the high gloss of the glaze surface and the stability of the glaze layer, thereby achieving a mirror-like high-gloss effect in hot-bent slabs. Summary of the Invention

[0005] Based on this, in order to solve one of the above-mentioned technical problems, the present invention provides a hot-bending slab with a mirror-like high gloss finish and a method for preparing the same, the specific technical solution of which is as follows:

[0006] A mirror-finish high-gloss hot-bent slab includes a slab blank and a glaze layer covering the surface of the slab blank. The glaze layer is formed by applying and firing a glaze material, and the glaze material comprises the following raw materials in parts by weight:

[0007] The mixture consists of 10-15 parts calcined kaolin, 3-5 parts bentonite, 5-9 parts corundum powder, 6-15 parts modified mica powder, 4-5 parts talc powder, 5-9 parts modified glass powder, 10-15 parts frit A, 8-12 parts frit B, and 1-7 parts auxiliary additives.

[0008] The frit A comprises the following components by mass percentage: SiO2: 60-70%, Al2O3: 3-8%, ZrO2: 5-10%, ZnO: 5-12%, Li2O: 5-6%, Na2O: 1-3%, K2O: 1-2%, TiO2: 0.5-0.55%, and loss on ignition: 0.5-0.7%.

[0009] The frit B comprises the following components by mass percentage: SiO2: 40-45%, SnO2: 15-25%, Al2O3: 7-9%, SrO: 8-12%, CaO: 1-3%, MgO: 1-2%, BaO: 5-9%, P2O5: 0.1-0.5%, B2O3: 0.1-0.5%, CeO2: 0.5-1%, and loss on ignition: 0.5-0.7%.

[0010] Preferably, the modified mica powder is prepared by ball milling, followed by acid washing, adding a silane coupling agent under stirring conditions, stirring for 10-15 minutes, adding pentaerythritol triacrylate, continuing stirring for 20-30 minutes, filtering, and then washing, drying, and crushing to obtain the modified mica powder.

[0011] Preferably, the ball milling process is performed at a rotation speed of 20 r / min to 50 r / min for a time of 30 min to 60 min.

[0012] Preferably, the pickling treatment is as follows: adding hydrochloric acid with a mass percentage concentration of 4% to 10%, treating at 60°C to 65°C for 20 to 30 minutes, and then washing until neutral.

[0013] Preferably, the ratio of mica powder, silane coupling agent, and pentaerythritol triacrylate by weight is (5~20):(15~20):(1~2).

[0014] Preferably, the modified glass powder is prepared by adding glass powder to anhydrous ethanol, then adding sodium carboxymethyl cellulose and silane coupling agent, stirring at a temperature of 65℃~80℃ for 20min~30min, and drying to obtain modified glass powder.

[0015] Preferably, the ratio of glass powder, anhydrous ethanol, sodium carboxymethyl cellulose and silane coupling agent by weight is (5~15):(15~20):(1~5):(1~8).

[0016] Preferably, the auxiliary additive is at least one of a dispersant, a binder, and a wetting agent.

[0017] In addition, the present invention also provides a method for preparing a hot-bent slab with a mirror-like high gloss finish, the method comprising the following steps:

[0018] S1. Select the slab blank;

[0019] S2. Prepare glaze and apply it to the surface of the rock slab blank, dry it to form a glaze layer, and then fire it at a temperature of 1150℃~1250℃ for a period of 45~70 minutes.

[0020] S3. The slab after step S2 is hot-bent and then cooled to room temperature at a rate of 3-10℃ / min to obtain a mirror-gloss hot-bent slab.

[0021] Preferably, the hot bending process is as follows: in the first stage, the temperature is raised to 800℃~900℃ at a heating rate of 10~12℃ / min; in the second stage, the temperature is raised to 800℃~1050℃ at a heating rate of 3~5℃ / min; and the hot bending process lasts for 40min~60min.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In this invention, by optimizing the composition of the glaze, the thermal stability of the glaze surface during firing and hot bending processes can be promoted. The addition of frit A and frit B not only ensures the quality of the glaze surface, but also provides excellent gloss due to the high refractive index of ZrO2 in frit A, which produces strong specular reflection. The SnO2, CaO, and CeO2 components in frit B contribute to whiteness and gloss. SrO can increase the refractive index of the glaze, making the glaze surface more reflective of light and visually more glossy. Furthermore, SnO2 microcrystals can fill the glass phase, making the glaze surface denser, which helps to enhance gloss and promote the formation of a mirror effect.

[0024] 2. This invention utilizes modified mica powder and modified glass powder, exhibiting excellent compatibility and superior mechanical properties and interfacial compatibility. This effectively combats glaze cracking caused by stress mismatch or deformation stress in the body and glaze. Furthermore, the modified mica powder can be oriented, and its mullite phase enhances high-temperature resistance and maintains a mirror-like finish. It also prevents excessive shrinkage stress in the glaze layer during drying and initial firing, avoiding cracking and glaze curling, thus ensuring glaze quality. Additionally, it provides more adhesion sites for the modified glass powder, resulting in uniform dispersion and further improving the mirror effect.

[0025] 3. The glaze layer of this invention can undergo plastic deformation synchronously and continuously with the body without defects such as orange peel, cracks, blistering, or pinholes. Combined with segmented hot bending treatment, the resulting hot-bent slab product can still maintain a complete, smooth, and mirror-like high-gloss glaze effect on the curved surface. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of protection of the invention.

[0027] A mirror-finish high-gloss hot-bent slab according to one embodiment of the present invention includes a slab blank and a glaze layer covering the surface of the slab blank. The glaze layer is formed by applying glaze and firing, and the glaze comprises the following raw materials in parts by weight:

[0028] The mixture consists of 10-15 parts calcined kaolin, 3-5 parts bentonite, 5-9 parts corundum powder, 6-15 parts modified mica powder, 4-5 parts talc powder, 5-9 parts modified glass powder, 10-15 parts frit A, 8-12 parts frit B, and 1-7 parts auxiliary additives.

[0029] The frit A comprises the following components by mass percentage: SiO2: 60-70%, Al2O3: 3-8%, ZrO2: 5-10%, ZnO: 5-12%, Li2O: 5-6%, Na2O: 1-3%, K2O: 1-2%, TiO2: 0.5-0.55%, and loss on ignition: 0.5-0.7%.

[0030] The frit B comprises the following components by mass percentage: SiO2: 40-45%, SnO2: 15-25%, Al2O3: 7-9%, SrO: 8-12%, CaO: 1-3%, MgO: 1-2%, BaO: 5-9%, P2O5: 0.1-0.5%, B2O3: 0.1-0.5%, CeO2: 0.5-1%, and loss on ignition: 0.5-0.7%.

[0031] In one embodiment, the modified mica powder is prepared by ball milling, followed by acid washing, adding a silane coupling agent under stirring, stirring for 10-15 minutes, adding pentaerythritol triacrylate, and continuing stirring for 20-30 minutes, filtering, and then washing, drying, and crushing to obtain the modified mica powder.

[0032] In one embodiment, the ball milling process is performed at a rotation speed of 20 r / min to 50 r / min for a duration of 30 min to 60 min.

[0033] In one embodiment, the pickling process is as follows: adding hydrochloric acid with a mass percentage concentration of 4% to 10%, treating at 60°C to 65°C for 20 to 30 minutes, and then washing until neutral.

[0034] In one embodiment, the ratio of mica powder, silane coupling agent, and pentaerythritol triacrylate by weight is (5~20):(15~20):(1~2).

[0035] In one embodiment, the silane coupling agent in the modified mica powder is at least one selected from vinyltrimethoxysilane, diallyldimethylsilane, and dimethylphenylvinylsilane. This invention removes surface impurities through acid washing purification, avoiding the adverse effects of impurities on the modification effect, and activates the surface. Combined with the effects of the silane coupling agent and pentaerythritol triacrylate, chemical bonds are formed with the mica powder surface, solving the problem of weak interfacial adhesion. Furthermore, the bonding between the mica powder surface and the silane layer, with the long-chain hydrocarbon groups facing outwards, greatly reduces the surface energy of the mica powder, providing excellent steric hindrance, thereby achieving excellent dispersibility and a silky feel, and exhibiting better compatibility in the glaze layer.

[0036] In one embodiment, the modified glass powder is prepared by adding glass powder to anhydrous ethanol, then adding sodium carboxymethyl cellulose and a silane coupling agent, stirring at a temperature of 65°C to 80°C for 20 to 30 minutes, and drying to obtain the modified glass powder.

[0037] In one embodiment, the ratio of glass powder, anhydrous ethanol, sodium carboxymethyl cellulose, and silane coupling agent by weight is (5~15):(15~20):(1~5):(1~8).

[0038] In one embodiment, the glass powder is at least one of lead borosilicate glass powder, lead silicate glass, and lead tellurite glass.

[0039] In one embodiment, the D50 particle size of the glass powder is 1 μm to 3 μm.

[0040] In one embodiment, the silane coupling agent in the modified glass powder is at least one of vinyltrimethoxysilane, divinyldimethylsilane, and dimethylphenylvinylsilane.

[0041] In one embodiment, the auxiliary additive is at least one of a dispersant, a binder, and a wetting agent.

[0042] In one embodiment, the dispersant is at least one of sodium tripolyphosphate, polypyrrolidone, and sodium carboxymethyl cellulose.

[0043] In one embodiment, the adhesive is at least one of polyvinyl alcohol and hydroxypropyl starch ether.

[0044] In one embodiment, the wetting agent is a fatty alcohol polyoxyethylene ether.

[0045] In addition, the present invention also provides a method for preparing a hot-bent slab with a mirror-like high gloss finish, the method comprising the following steps:

[0046] S1. Select the slab blank;

[0047] S2. Prepare glaze and apply it to the surface of the rock slab blank, dry it to form a glaze layer, and then fire it at a temperature of 1150℃~1250℃ for a period of 45min~70min.

[0048] S3. The slab after step S2 is hot-bent and then cooled to room temperature at a rate of 3-10℃ / min to obtain a mirror-gloss hot-bent slab.

[0049] In one embodiment, the slab blank in step S1 is obtained by conventional technical means, which is a choice that those skilled in the art would be motivated to make, and will not be elaborated here.

[0050] In one embodiment, step S2 involves preparing the glaze by mixing calcined kaolin, bentonite, corundum powder, modified mica powder, talc powder, modified glass powder, frit A, frit B, and auxiliary additives, followed by wet ball milling until a D97 of 8μm-10μm is achieved, and then allowing it to stand for 12-24 hours to obtain the glaze. The extremely fine particle size of the glaze (D97 of 8μm-10μm) ensures a high-density molecular-level arrangement on the glaze surface after firing, fundamentally eliminating macroscopic and microscopic unevenness, thus achieving a mirror-like smooth visual effect and tactile feel.

[0051] In one embodiment, the specific gravity of the glaze is 1.4 g / cm³ to 1.6 g / cm³.

[0052] In one embodiment, in step S2, the amount of glaze applied is 450 g / m³. 2 - 500g / m 2 .

[0053] In one embodiment, in step S2, the drying temperature is 85°C to 100°C.

[0054] In one embodiment, in step S3, the hot bending process is as follows: in the first stage, the temperature is raised to 800℃~900℃ at a heating rate of 10~12℃ / min; in the second stage, the temperature is raised to 800℃~1050℃ at a heating rate of 3~5℃ / min; and the hot bending process lasts for 40min~60min.

[0055] The above solution, through optimization of the glaze composition, can achieve an ideal mirror-like high-gloss effect overall.

[0056] The embodiments of the present invention will be described in detail below with reference to specific examples. All components not mentioned in this invention are commercially available, and the processes not mentioned are not conventional techniques and do not involve creative effort; therefore, they will not be elaborated upon. Example 1:

[0057] A method for preparing a mirror-gloss hot-bent slab includes the following steps:

[0058] S1. Select the slab blank;

[0059] S2. Prepare the glaze and use 500g / m 2 The amount of glaze is applied to the surface of the rock slab blank, dried at 85°C to form a glaze layer, and then fired at 1220°C for 45 minutes.

[0060] The glaze is prepared as follows: 12 parts by weight of calcined kaolin, 4 parts of bentonite, 7 parts of corundum powder, 12 parts of modified mica powder, 4 parts of talc powder, 7 parts of modified glass powder, 13 parts of frit A, 12 parts of frit B, 1 part of sodium tripolyphosphate, 2 parts of polyvinyl alcohol, and 2 parts of fatty alcohol polyoxyethylene ether are mixed and wet-milled until D97 is 10 μm. The mixture is then allowed to stand for 20 hours to age, yielding a specific gravity of 1.52 g / cm³. 3 Glaze;

[0061] The modified mica powder is prepared as follows: 15 parts by weight of mica powder are ball-milled at 20 r / min for 30 min, then 4% hydrochloric acid is added and treated at 60℃ for 20 min. After washing until neutral, 15 parts of divinyldimethylsilane are added under stirring and stirred for 10 min. Then 1 part of pentaerythritol triacrylate is added and stirred for another 20 min. After filtration, the modified mica powder is obtained by washing, drying and crushing.

[0062] The modified glass powder is prepared by adding 10 parts of lead borosilicate glass powder to 15 parts of anhydrous ethanol by weight, then adding 3 parts of sodium carboxymethyl cellulose and 7 parts of vinyltrimethoxysilane, stirring at 70°C for 25 minutes, and drying to obtain the modified glass powder.

[0063] The frit A comprises the following components by mass percentage: SiO2: 69%, Al2O3: 5%, ZrO2: 7%, ZnO: 9%, Li2O: 6%, Na2O: 2%, K2O: 1%, TiO2: 0.5%, and loss on ignition: 0.5%.

[0064] The frit B comprises the following components by mass percentage: SiO2: 44%, SnO2: 23.8%, Al2O3: 7%, SrO: 11%, CaO: 3%, MgO: 1%, BaO: 8%, P2O5: 0.2%, B2O3: 0.3%, CeO2: 1%, and loss on ignition: 0.7%.

[0065] S3. The slab after step S2 is subjected to hot bending treatment, and the hot bending treatment is as follows: in the first stage, the temperature is raised to 800°C at a heating rate of 10°C / min; in the second stage, the temperature is raised to 1050°C at a heating rate of 5°C / min; the hot bending treatment is carried out for 40 minutes; and then the temperature is cooled to room temperature at a rate of 5°C / min to obtain a mirror-like high-gloss hot-bent slab. Example 2:

[0066] A method for preparing a mirror-gloss hot-bent slab includes the following steps:

[0067] S1. Select the slab blank;

[0068] S2. Prepare the glaze and use 500g / m 2 The amount of glaze is applied to the surface of the rock slab blank, dried at 85°C to form a glaze layer, and then fired at 1220°C for 45 minutes.

[0069] The glaze is prepared as follows: 13 parts calcined kaolin, 3 parts bentonite, 8 parts corundum powder, 12 parts modified mica powder, 4 parts talc powder, 8 parts modified glass powder, 15 parts frit A, 10 parts frit B, 1 part sodium tripolyphosphate, 2 parts polyvinyl alcohol, and 2 parts fatty alcohol polyoxyethylene ether are mixed by weight, wet ball milled until D97 is 10 μm, and allowed to stand for aging for 20 hours to obtain a specific gravity of 1.53 g / cm³. 3 Glaze;

[0070] The modified mica powder is prepared as follows: 15 parts by weight of mica powder are ball-milled at 20 r / min for 30 min, then 4% hydrochloric acid is added and treated at 65℃ for 20 min. After washing until neutral, 15 parts of divinyldimethylsilane are added under stirring and stirred for 10 min. Then 1 part of pentaerythritol triacrylate is added and stirred for another 25 min. After filtration, the modified mica powder is obtained by washing, drying and crushing.

[0071] The modified glass powder is prepared by adding 12 parts of lead borosilicate glass powder to 15 parts of anhydrous ethanol by weight, then adding 4 parts of sodium carboxymethyl cellulose and 8 parts of vinyltrimethoxysilane, stirring at 80°C for 25 minutes, and drying to obtain the modified glass powder.

[0072] The frit A comprises the following components by mass percentage: SiO2: 68%, Al2O3: 6%, ZrO2: 8%, ZnO: 8%, Li2O: 5%, Na2O: 3%, K2O: 1%, TiO2: 0.5%, and loss on ignition: 0.5%.

[0073] The frit B comprises the following components by mass percentage: SiO2: 45%, SnO2: 24%, Al2O3: 7%, SrO: 12%, CaO: 2%, MgO: 1%, BaO: 6.8%, P2O5: 0.3%, B2O3: 0.2%, CeO2: 1%, and loss on ignition: 0.7%.

[0074] S3. The slab after step S2 is subjected to hot bending treatment, which is as follows: in the first stage, the temperature is raised to 900°C at a heating rate of 10°C / min; in the second stage, the temperature is raised to 1050°C at a heating rate of 5°C / min; the hot bending treatment is carried out for 50 minutes; and then the temperature is cooled to room temperature at a rate of 6°C / min to obtain a mirror-finish high-gloss hot-bent slab. Example 3:

[0075] A method for preparing a mirror-gloss hot-bent slab includes the following steps:

[0076] S1. Select the slab blank;

[0077] S2. Prepare the glaze and use 500g / m 2 The amount of glaze is applied to the surface of the rock slab blank, dried at 85°C to form a glaze layer, and then fired at 1220°C for 45 minutes.

[0078] The glaze is prepared as follows: 12 parts by weight of calcined kaolin, 4 parts of bentonite, 8 parts of corundum powder, 15 parts of modified mica powder, 5 parts of talc powder, 5 parts of modified glass powder, 13 parts of frit A, 12 parts of frit B, 1 part of sodium tripolyphosphate, 2 parts of polyvinyl alcohol, and 2 parts of fatty alcohol polyoxyethylene ether are mixed and wet-milled until D97 is 10 μm. The mixture is then allowed to stand for 20 hours to age, yielding a specific gravity of 1.56 g / cm³. 3 Glaze;

[0079] The modified mica powder is prepared as follows: 15 parts by weight of mica powder are ball-milled at 20 r / min for 30 min, then 4% hydrochloric acid is added and treated at 65℃ for 20 min. After washing until neutral, 16 parts of divinyldimethylsilane are added under stirring and stirred for 10 min. Then 2 parts of pentaerythritol triacrylate are added and stirred for another 30 min. After filtration, the modified mica powder is obtained by washing, drying and crushing.

[0080] The modified glass powder is prepared by adding 12 parts of lead borosilicate glass powder to 15 parts of anhydrous ethanol by weight, then adding 5 parts of sodium carboxymethyl cellulose and 8 parts of vinyltrimethoxysilane, stirring at 80°C for 25 minutes, and drying to obtain the modified glass powder.

[0081] The frit A comprises the following components by mass percentage: SiO2: 68%, Al2O3: 6%, ZrO2: 8%, ZnO: 7%, Li2O: 6%, Na2O: 3%, K2O: 1%, TiO2: 0.5%, and loss on ignition: 0.5%.

[0082] The frit B comprises the following components by mass percentage: SiO2: 45%, SnO2: 22%, Al2O3: 8%, SrO: 12%, CaO: 2%, MgO: 2%, BaO: 7%, P2O5: 0.3%, B2O3: 0.5%, CeO2: 0.5%, and loss on ignition: 0.7%.

[0083] S3. The slab after step S2 is subjected to hot bending treatment, which is as follows: in the first stage, the temperature is raised to 900°C at a heating rate of 12°C / min; in the second stage, the temperature is raised to 1000°C at a heating rate of 5°C / min; the hot bending treatment lasts for 60 minutes; and then the slab is cooled to room temperature at a rate of 5°C / min to obtain a mirror-finish high-gloss hot-bent slab.

[0084] Comparative Example 1:

[0085] The difference between Comparative Example 1 and Example 3 is that the composition of the frit A in Comparative Example 1 is different, while the rest is the same as in Example 3.

[0086] The frit A in Comparative Example 1 contains the following components by mass percentage: SiO2: 68%, Al2O3: 14%, Li2O: 6%, Na2O: 10%, K2O: 1%, TiO2: 0.5%, and loss on ignition: 0.5%.

[0087] Comparative Example 2:

[0088] The difference between Comparative Example 2 and Example 3 is that no melt A was added in Comparative Example 2, but otherwise it is the same as Example 3.

[0089] Comparative Example 3:

[0090] The difference between Comparative Example 3 and Example 3 is that the composition of the frit B in Comparative Example 3 is different, while the rest is the same as in Example 3.

[0091] The frit B in Comparative Example 3 contains the following components by mass percentage: SiO2: 67%, Al2O3: 8%, CaO: 14%, MgO: 2%, BaO: 7%, P2O5: 0.3%, B2O3: 0.5%, CeO2: 0.5%, and loss on ignition: 0.7%.

[0092] Comparative Example 4:

[0093] The difference between Comparative Example 4 and Example 3 is that no frit B was added in Comparative Example 4, but otherwise it is the same as Example 3.

[0094] Comparative Example 5:

[0095] The difference between Comparative Example 5 and Example 3 is that the mica powder in Comparative Example 5 was not modified, but otherwise it was the same as Example 3.

[0096] Comparative Example 6:

[0097] The difference between Comparative Example 6 and Example 3 is that no modified mica powder was added in Comparative Example 6, but otherwise it is the same as Example 3.

[0098] Comparative Example 7:

[0099] The difference between Comparative Example 7 and Example 3 is that no modified glass powder was added in Comparative Example 7, but otherwise it is the same as Example 3.

[0100] I. The hot-bent slab samples prepared in Examples 1-3 and the hot-bent slab samples prepared in Comparative Examples 1-7 were subjected to appearance testing. The method was to observe with the naked eye by those skilled in the art. If necessary, a magnifying glass could be used as an auxiliary tool. The results are shown in Table 1 below.

[0101] Table 1: Appearance Evaluation

[0102]

[0103] Analysis of the data in Table 1 shows that, through component optimization, the present invention can achieve a mirror-like high-gloss effect overall. Compared with Example 3, the change in the composition of frit A in Comparative Example 1 resulted in poorer fluidity and gloss of the glaze, and the glaze effect was not as good as that of Example 3; Comparative Example 2 did not add frit A, lacking a glass phase, which affected the glaze effect; the change in the composition of frit B in Comparative Example 3 and the absence of frit B in Comparative Example 4 both made it difficult to form a pure mirror-like base color, affecting the glaze effect. This indicates that the addition of specific frits A and B in the present invention can effectively promote the formation of a smooth, high-gloss, and mirror-like glaze; the mica powder in Comparative Example 5 was not modified, resulting in poor dispersibility and thermal stability, which affected the consistency of appearance, and local agglomeration also affected the glaze effect; Comparative Example 6 did not add modified mica powder, lacking the skeletal reinforcement and toughening effect of modified mica powder, resulting in cracks during hot bending; Comparative Example 7 did not add modified glass powder, resulting in poor glaze meltability and lack of glass powder reflection, leading to a poor mirror-like effect of the glaze.

[0104] II. Performance tests were conducted on the hot-bent slab samples prepared in Examples 1-3 and the hot-bent slab samples prepared in Comparative Examples 1-7. The test method was to test the strength and gloss of the samples under conventional conditions and thermal shock conditions. The thermal shock conditions were to place the samples at 100°C for 12 hours and then at -5°C for 12 hours, which constituted one cycle, and the cycle was repeated 10 times. The results are shown in Table 2 below.

[0105] Table 2: Performance Test Results

[0106]

[0107] As can be seen from the analysis of Table 2, after the glaze surface is optimized by the present invention, the flexural strength and gloss remain excellent, indicating that the glaze layer and the body have excellent thermal compatibility and overall structural density, which can achieve excellent and stable mirror high gloss effect. Compared with Example 3, Comparative Examples 1 and 2 changed frit A, and Comparative Examples 3 and 4 changed frit B. All of these changes affected the retention rate of flexural strength and gloss, indicating that the composition of frit A and frit B can affect the adhesion between the body and the glaze layer, as well as the stability of the glaze layer, and thus also affect the mirror-like high-gloss effect of the slab. In Comparative Example 5, the mica powder was not modified, resulting in poor compatibility in the glaze, local agglomeration, and internal stress, which affected the hot bending forming effect of the glaze layer and also affected the flexural strength and gloss. In Comparative Example 6, no modified mica powder was added, and the glaze layer cracked during the hot bending process, destroying the mirror structure and resulting in a significantly worse gloss retention rate than Example 3. This indicates that the modified mica powder of the present invention can effectively promote the formation of a mirror-like high-gloss effect and maintain the stability of the hot bending process. In Comparative Example 7, no modified glass powder was added, resulting in poor glaze meltability, poor interfacial compatibility between the glaze layer and the body, poor mirror effect of the glaze, and a lower gloss retention rate than Example 3.

[0108] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A mirror highlight hot bending forming rock plate, comprising a rock plate blank and a glaze layer covering the surface of the rock plate blank, characterized in that, The glaze layer is formed by glazing and firing of glaze material, and the glaze material comprises the following raw materials by weight: 10-15 parts of calcined kaolin, 3-5 parts of bentonite, 5-9 parts of corundum powder, 6-15 parts of modified mica powder, 4-5 parts of talc powder, 5-9 parts of modified glass powder, 10-15 parts of frit A, 8-12 parts of frit B, and 1-7 parts of auxiliary additives; The frit A comprises the following components by mass percentage: SiO2: 60-70%, Al2O3: 3-8%, ZrO2: 5-10%, ZnO: 5-12%, Li2O: 5-6%, Na2O: 1-3%, K2O: 1-2%, TiO2: 0.5-0.55%, and loss on ignition: 0.5-0.7%; The frit B comprises the following components by mass percentage: SiO2: 40-45%, SnO2: 15-25%, Al2O3: 7-9%, SrO: 8-12%, CaO: 1-3%, MgO: 1-2%, BaO: 5-9%, P2O5: 0.1-0.5%, B2O3: 0.1-0.5%, CeO2: 0.5-1%, and loss on ignition: 0.5-0.7%; The preparation method of the modified mica powder is as follows: the mica powder is subjected to ball milling treatment, then subjected to acid pickling treatment, under stirring, silane coupling agent is added and stirred for 10-15 minutes, then pentaerythritol triacrylate is added and stirred for 20-30 minutes, and then the modified mica powder is obtained after filtration, washing, drying, and crushing; The preparation method of the modified glass powder is as follows: the glass powder is added to anhydrous ethanol, then carboxymethyl cellulose sodium and silane coupling agent are added, and stirring is performed at a temperature of 65-80°C for 20-30 minutes, and then the modified glass powder is obtained after drying.

2. The mirror high light hot bending forming rock plate according to claim 1, characterized in that, The ball milling treatment is performed at a speed of 20-50 r / min for 30-60 minutes.

3. The mirror high light hot bending forming rock plate according to claim 1, characterized in that, The acid pickling treatment is performed by adding hydrochloric acid with a mass percentage concentration of 4-10% and treating at 60-65°C for 20-30 minutes, and then washing to neutral.

4. The mirror high light hot bending forming rock plate of claim 1, wherein, The ratio of mica powder, silane coupling agent, and pentaerythritol triacrylate is (5-20):(15-20):(1-2) by weight.

5. The mirror high light hot bending forming rock plate of claim 1, wherein, The ratio of the glass powder, anhydrous ethanol, carboxymethyl cellulose sodium, and silane coupling agent is (5-15):(15-20):(1-5):(1-8) by weight.

6. The mirror high light hot bending forming rock plate of claim 1, wherein, The auxiliary additive is at least one of a dispersant, a binder, and a wetting agent.

7. A method for preparing a mirror high light hot bending forming rock plate, characterized in that, The preparation method is used to prepare the mirror high light thermal bending forming rock plate according to any one of claims 1-6, and the preparation method comprises the following steps: S1. selecting a rock plate blank; S2. preparing glaze material and applying it to the surface of the rock plate blank, drying, forming a glaze layer, and then firing at a temperature of 1150-1250°C for 45-70 minutes. S3. The rock plate after step S2 is subjected to heat bending treatment, and then cooled to room temperature at a rate of 3-10 ℃ / min, to obtain a mirror high light heat-bent rock plate.

8. The production method according to claim 7, characterized by, The heat bending treatment is: in the first stage, the temperature is raised to 800-900 ℃ at a temperature raising rate of 10-12 ℃ / min, in the second stage, the temperature is raised to 1000-1050 ℃ at a temperature raising rate of 3-5 ℃ / min, and the heat bending treatment is performed for 40-60 min.

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