An 80-degree ultra-white, translucent jade-like ceramic rock plate, blank, and preparation method thereof

Abstract

This invention discloses an 80-degree ultra-white translucent jade-like ceramic slab, a blank, and its preparation method. The blank includes a blank layer composed of the following parts by weight: 15-30 parts ultra-white kaolin, 5-10 parts high-white plastic clay, 30-60 parts high-white potassium sodium sand, 20-40 parts frit, 0-5 parts calcined talc, and 0.1-1 parts body reinforcing agent; the frit includes the following components by mass percentage: 50.0-65.0% SiO2, 14... The composition includes 0.0–19.0% Al₂O₃, 3.0–12.0% CaO, 0.5–4.0% K₂O, 3.0–6.0% Na₂O, 2.0–6.0% ZnO, 2.0–6.0% SrO, and 5.0–15% BaO. The iron content of the ultra-white kaolin and high-white plastic clay is ≤0.2%. The iron content of the high-white potassium sodium sand is ≤0.1%. The dry flexural strength of the high-white plastic clay is 8–15 MPa. Under lighting, this slab exhibits a softer, warmer, and more translucent light transmission, with uniform light transmission and color, and a finer texture, making it suitable for use in large-scale lighting background walls.

Description

Technical Field

[0001] This invention relates to the field of ceramic slab technology, and in particular to an 80-degree ultra-white translucent jade-like ceramic slab, raw material and preparation method thereof. Background Technology

[0002] Ceramic slabs, as a new type of material, are gaining increasing popularity in the market for their high-end ceramic products such as bathroom cabinets and bathroom backsplashes due to their high-quality white jade texture and excellent physical properties, such as high temperature resistance, scratch resistance, water resistance, and acid and alkali resistance. The cross-application nature of slabs means they are not only suitable for traditional wall and floor decorations, but also for kitchen countertops, lighting backsplashes, and other areas.

[0003] Currently, the whiteness of large-format white ceramic slabs commonly found on the market is generally within 65 degrees. Occasionally, white slabs with a whiteness of 70 degrees can be seen, such as the ceramic slab with a jade-like fish belly white effect disclosed in patent ZL202111203717.2. Although the whiteness of the ceramic slab is greater than 75 degrees, and it solves the problems of insufficient drying strength and poor molding performance of existing high-white slabs, which lead to breakage and broken bricks, its light transmittance is insufficient, the light transmission color is scattered, and the tone is dark, so it cannot be used in high-end large-format lighting background walls. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, one of the objectives of the present invention is to provide a blank for an 80-degree ultra-white translucent jade-like ceramic slab.

[0005] The second objective of this invention is to provide a method for preparing a blank for an 80-degree ultra-white translucent jade-like ceramic slab.

[0006] The third objective of this invention is to provide an 80-degree ultra-white translucent jade-like ceramic slab.

[0007] The fourth objective of this invention is to provide a method for preparing an 80-degree ultra-white translucent jade-like ceramic slab.

[0008] One of the objectives of this invention is achieved by the following technical solution: a blank for an 80-degree ultra-white translucent jade-like ceramic slab, characterized in that it includes a blank layer, wherein the blank layer is composed of the following blanks in parts by weight: 15-30 parts ultra-white kaolin, 5-10 parts high-white plastic clay, 30-60 parts high-white potassium sodium sand, 20-40 parts frit, 0-5 parts calcined talc, and 0.1-1 parts body reinforcing agent;

[0009] The frit comprises the following components by mass percentage: 50.0–65.0% SiO2, 14.0–19.0% Al2O3, 3.0–12.0% CaO, 0.5–4.0% K2O, 3.0–6.0% Na2O, 2.0–6.0% ZnO, 2.0–6.0% SrO, and 5.0–15% BaO;

[0010] The iron content of the super-white kaolin and the high-white plastic clay is ≤0.2%; the iron content of the high-white potassium sodium sand is ≤0.1%; and the dry flexural strength of the high-white plastic clay is 8-15 MPa.

[0011] Optionally, the blank may further include a colorant, which accounts for 0.5 to 4% of the total mass of the blank.

[0012] The second objective of this invention is achieved by the following technical solution: a method for preparing the blank of the 80-degree ultra-white translucent jade-like ceramic slab as described above, comprising the following steps:

[0013] (1) Ball milling process: According to the weight, the raw materials for 80-degree ultra-white translucent jade ceramic slabs are put into the ball mill in sequence, then water is added, and after ball milling, sieving, and iron removal, they are put into a clean slurry tank to obtain slurry.

[0014] (2) Aging process: The slurry obtained from the ball milling process is poured into the slurry tank, stirred evenly, and aged for more than 48 hours;

[0015] (3) Spraying process: The aged slurry from the aging process is fed into the spray drying tower through the spray tower mud pump. After spray drying in the spray drying tower, the body powder of 80-degree ultra-white translucent jade ceramic rock slab is obtained.

[0016] Optionally, in step (1), before ball milling, the bucket, feeder and conveyor belt of the loader need to be cleaned. The balls used in ball milling are high-alumina balls. The slurry after ball milling, sieving and iron removal is transported into the slurry pool where the tiles are completely laid, and waits for homogenization and aging.

[0017] Optionally, in step (1), the ball milling process parameters are: water volume of 34-37% of the total weight of dry material, and specific gravity of the output slurry of 1.65-1.72 g / cm³. 3 Flow rate 55-85 seconds, fineness of 10,000-mesh sieve 0.2-0.8.

[0018] Optionally, in step (3), natural gas is used as fuel for the spray drying tower. After being sprayed into powder by the spray drying tower, the powder is stored in a dedicated stainless steel powder silo through a clean conveying system.

[0019] Optionally, in step (3), the spray drying process parameters in the powder coating process are: moisture content controlled at 7-7.5%; bulk density at 0.8-0.9 g / cm³. 3 The particle size distribution range of the powder is: 30 mesh 3-8%, 40 mesh 20-40%, 60 mesh 35-55%, and 120 mesh <3%.

[0020] Optionally, the preparation method of the 80-degree ultra-white translucent jade ceramic rock slab further includes (4) the process of adding colorant: after ball milling and aging, the slurry is mixed with colorant and stirred evenly to obtain colored line slurry; then, after powder spraying, colored line powder is obtained.

[0021] The third objective of this invention is achieved by the following technical solution: an 80-degree ultra-white translucent jade-like ceramic slab, wherein the blank of the ceramic slab is the blank of the 80-degree ultra-white translucent jade-like ceramic slab.

[0022] The fourth objective of this invention is achieved by the following technical solution: a method for preparing an 80-degree ultra-white translucent jade-like ceramic slab, characterized in that it includes: a blank preparation method and a blank forming method;

[0023] The blank preparation method is the same as the blank preparation method for the 80-degree ultra-white translucent jade ceramic slab described above.

[0024] The billet forming method includes the following steps:

[0025] (5) Fabric application process: The blank powder and / or colored line material are applied according to the preset pattern by a digital fabric application machine, and after pressing and molding, the blank is dried.

[0026] (6) Glazing process: Apply surface glaze to the dried body in step (5); inkjet print pattern layer, and align the pattern layer with the fabric layer in step (5) in color and position.

[0027] (7) Polishing and waxing process: The blank obtained in step (6) is fired, the surface of the blank is treated, and polishing and waxing are performed as needed; or the blank obtained in step (6) is glazed, fired, and the glaze is polished and waxed as needed.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] This invention adjusts the raw material formula, especially the frit formula, for 80-degree ultra-white translucent jade-like ceramic slabs, so that the jade-like ceramic slab products maintain the physical and chemical properties of green body, such as flexural strength, modulus of rupture, and firing temperature range. It also improves the whiteness (whiteness of body ≥ 85 degrees), light transmittance (light transmittance ≥ 6.5%), and texture to a higher level. This makes the ceramic slabs and slabs more translucent and warm under light, with more uniform light transmission and color, and a more delicate texture. They are more suitable for use in high-end large-scale lighting background walls with certain lighting effects. Attached Figure Description

[0030] Figure 1 This is an image of the ceramic rock slab in Example 2 illuminated from bottom to top by a light source.

[0031] Figure 2 The images show seven ceramic rock slabs as a comparison, illuminated from the same light source from bottom to top. Detailed Implementation

[0032] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0033] In this invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the art. Unless otherwise specified, the methods in the following embodiments are conventional methods in the art.

[0034] A blank for an 80-degree ultra-white translucent jade-like ceramic slab includes a blank layer, which is composed of the following blanks in parts by weight: 15-30 parts ultra-white kaolin, 5-10 parts high-white plastic clay, 30-60 parts high-white potassium sodium sand, 20-40 parts frit, 0-5 parts calcined talc, and 0.1-1 parts body reinforcing agent;

[0035] The frit comprises the following components by mass percentage: 50.0–65.0% SiO2, 14.0–19.0% Al2O3, 3.0–12.0% CaO, 0.5–4.0% K2O, 3.0–6.0% Na2O, 2.0–6.0% ZnO, 2.0–6.0% SrO, and 5.0–15% BaO;

[0036] The iron content of the super-white kaolin and the high-white plastic clay is ≤0.2%; the iron content of the high-white potassium sodium sand is ≤0.1%; and the dry flexural strength of the high-white plastic clay is 8-15 MPa.

[0037] This solution provides a raw material for an 80-degree ultra-white translucent jade-like ceramic slab. By adjusting the raw material formula, especially the frit formula, the jade-like ceramic slab maintains the green body's flexural strength, modulus of rupture, and firing temperature range, while enhancing its high whiteness (body whiteness ≥ 85 degrees), light transmittance (light transmittance ≥ 6.5%), and a more delicate and warm texture. This results in a softer, warmer, and more transparent light transmission under lighting, with uniform light transmission and color, and a more delicate texture, making it more suitable for use in high-end large-scale lighting background walls with certain lighting effects.

[0038] Specifically, this scheme increases the content of ultra-white kaolin, and combines it with SiO2, SrO, BaO elements in the specially made frit and other combinations in the raw materials. These inorganic crystal materials have a highly ordered structure, and their atoms or molecules are arranged in a very regular manner. For example, silicon dioxide in the solid state is composed of uniformly and closely arranged SiO4 tetrahedra. This regular arrangement allows visible light to propagate freely between materials, thereby effectively improving the whiteness and light transmittance of the blank.

[0039] The raw materials used in the frit include sodium feldspar, potassium feldspar, quartz powder, alumina, calcite, strontium carbonate, and barium carbonate. After mixing, the frit is melted at 1450-1550℃ and then quenched in water to obtain a crystallized frit.

[0040] As a further embodiment, the billet also includes a colorant, which accounts for 0.5 to 4% of the total mass of the billet.

[0041] The second objective of this invention is achieved by the following technical solution: a method for preparing the blank of the 80-degree ultra-white translucent jade-like ceramic slab as described above, comprising the following steps:

[0042] (1) Ball milling process: According to the weight, the raw materials for 80-degree ultra-white translucent jade ceramic slabs are put into the ball mill in sequence, then water is added, and after ball milling, sieving, and iron removal, they are put into a clean slurry tank to obtain slurry.

[0043] (2) Aging process: The slurry obtained from the ball milling process is poured into the slurry tank, stirred evenly, and aged for more than 48 hours;

[0044] (3) Spraying process: The aged slurry from the aging process is fed into the spray drying tower through the spray tower mud pump. After spray drying in the spray drying tower, the body powder of 80-degree ultra-white translucent jade ceramic rock slab is obtained.

[0045] As a further implementation, in step (1), before ball milling, the bucket, feeder and conveyor belt of the loader need to be cleaned. The balls used in ball milling are high-alumina balls. The slurry after ball milling, sieving and iron removal is transported into the slurry pool where the tiles are completely laid, and waits for homogenization and aging.

[0046] As a further embodiment, in step (1), the ball milling process parameters are: water volume is 34-37% of the total weight of dry material, and the specific gravity of the output slurry is 1.65-1.72 g / cm³. 3 Flow rate 55-85 seconds, fineness of 10,000-mesh sieve 0.2-0.8.

[0047] As a further implementation, in step (3), natural gas is used as the fuel for the spray drying tower. After being sprayed into powder by the spray drying tower, the powder is stored in a dedicated stainless steel powder silo through a clean conveying system.

[0048] As a further embodiment, in step (3), the spray drying process parameters in the powder spraying process are: moisture content controlled at 7-7.5%; bulk density at 0.8-0.9 g / cm³. 3 The particle size distribution range of the powder is: 30 mesh 3-8%, 40 mesh 20-40%, 60 mesh 35-55%, and 120 mesh <3%.

[0049] As a further implementation method, the preparation method of the 80-degree ultra-white translucent jade ceramic rock slab also includes (4) the process of adding colorant: the slurry obtained after ball milling and aging is mixed with colorant and stirred evenly to obtain colored line slurry; then the slurry is sprayed to obtain colored line powder.

[0050] The third objective of this invention is achieved by the following technical solution: an 80-degree ultra-white translucent jade-like ceramic slab, wherein the blank of the ceramic slab is the blank of the 80-degree ultra-white translucent jade-like ceramic slab.

[0051] The fourth objective of this invention is achieved by the following technical solution: a method for preparing an 80-degree ultra-white translucent jade-like ceramic slab, characterized in that it includes: a blank preparation method and a blank forming method;

[0052] The blank preparation method is the same as the blank preparation method for the 80-degree ultra-white translucent jade ceramic slab described above.

[0053] The billet forming method includes the following steps:

[0054] (5) Fabric application process: The blank powder and / or colored line material are applied according to the preset pattern by a digital fabric application machine, and after pressing and molding, the blank is dried.

[0055] (6) Glazing process: Apply surface glaze to the dried body in step (5); inkjet print pattern layer, and align the pattern layer with the fabric layer in step (5) in color and position.

[0056] (7) Polishing and waxing process: The blank obtained in step (6) is fired, the surface of the blank is treated, and polishing and waxing are performed as needed; or the blank obtained in step (6) is glazed, fired, and the glaze is polished and waxed as needed. Among them, the glaze includes matte glaze, glossy glaze, full-polished glaze, dry granule glaze, etc. Polishing type includes semi-polished, full-polished, matte polished or no polishing.

[0057] The following are specific embodiments of the present invention. Unless otherwise specified, the raw materials, equipment and other materials used in the following embodiments can be obtained by purchasing.

[0058] Raw materials for 80-degree ultra-white translucent jade-like ceramic slabs (Examples 1-3)

[0059] Weigh the raw materials according to the proportions in Table 1, and prepare the blanks for jade ceramic slabs according to the preparation methods in Table 1. This yields blanks for jade ceramic slabs in different embodiments, as detailed in Table 1.

[0060] Table 1. Raw material ratio for jade ceramic slabs in Examples 1-3

[0061]

[0062] The raw materials used in the frit listed in Table 1 include albite, potassium feldspar, quartz powder, alumina, zinc oxide, calcite, strontium carbonate, and barium carbonate. These materials are mixed, melted at 1530℃, and water-quenched to obtain a crystallized frit. The frit comprises the following components by mass percentage: 61.42% SiO2, 16.15% Al2O3, 8.51% CaO, 2.8% K2O, 4.19% Na2O, 5.77% ZnO, 3.52% SrO, and 12.2% BaO.

[0063] The iron content of the super white kaolin and the high white plastic clay is ≤0.2%; the iron content of the high white potassium sodium sand is ≤0.1%; and the dry flexural strength of the high white plastic clay is 12MPa.

[0064] The preparation methods of the jade-based ceramic rock slabs in Examples 1-3 include the following steps:

[0065] 1. Preparation of raw materials for jade-like ceramic slabs:

[0066] (1) Ball milling process: The raw materials for 80-degree ultra-white translucent jade ceramic slabs are put into the ball mill in sequence according to the weight, and then water is added. After ball milling, sieving, and iron removal, the slurry is put into a clean slurry tank to obtain slurry. In step (1), before ball milling, the bucket of the loader, the feeder, and the conveyor belt need to be cleaned. The balls used in ball milling are high-alumina balls. The slurry after ball milling, sieving, and iron removal is transported into the slurry tank where the tiles are completely laid, and waits for homogenization and aging. In step (1), the ball milling process parameters are: water volume is 36% of the total weight of dry material, and the specific gravity of the ball slurry is 1.68 g / cm³. 3 Flow rate 65 seconds, fineness of 10,000-mesh sieve 0.2-0.8.

[0067] (2) Aging process: The slurry obtained from the ball milling process is poured into the slurry tank, stirred evenly, and aged for more than 48 hours;

[0068] (3) Spray Drying Process: The aged slurry from the aging process is fed into the spray drying tower via a slurry pump. After spray drying, the 80-degree ultra-white translucent jade-like ceramic slab blank powder is obtained. In step (3), natural gas is used as fuel for the spray drying tower. After spray drying, the powder is stored in a dedicated stainless steel powder silo via a clean conveying system. In step (3), the spray drying process parameters are: powder moisture content controlled at 7.0–7.5%; bulk density at 0.8–0.9 g / cm³. 3 The particle size distribution range of the powder is: 30 mesh 3-8%, 40 mesh 20-40%, 60 mesh 35-55%, and 120 mesh <3%. These powder process parameters are beneficial for the pressing and molding process of the System press.

[0069] (4) Pigment addition process: A portion of the slurry obtained after ball milling and aging is taken as the base material for the colored line powder. Pigment is added and mixed evenly to obtain the colored line slurry. Then, the colored line powder is obtained through a spraying process. In this example, three types of powder, namely body powder, dark gray line powder and light gray line powder, are used to lay the line material according to the preset pattern using a digital fabric laying machine. The light gray line powder is prepared by adding 0.12% silver gray material to 100% dry weight of ball-milled glaze slurry and spray drying to obtain light gray line powder. For dark gray body, 0.12% body black material, 0.04% silver gray material and 0.05% dark brown material are added to 100% dry weight of ball-milled glaze slurry and spray drying to obtain dark gray powder.

[0070] 2. Jade-like ceramic slab molding method:

[0071] (5) Fabric application process: The digital fabric application machine applies the blank powder and colored line material according to the preset pattern, and after pressing and molding, the blank is dried.

[0072] (6) Glazing process: Apply surface glaze to the dried body in step (5); inkjet print pattern layer, and align the pattern layer with the fabric layer in step (5) in color and position.

[0073] (7) Polishing and waxing process: The blank obtained in step (6) is fired, the surface of the blank is treated, and polishing and waxing are performed as needed.

[0074] Comparative Example 1

[0075] Compared with Example 2, the difference in Comparative Example 1 is that the amount of frit used in the raw material ratio of the jade ceramic slab is less than 20 parts, i.e., 18 parts. The other formula composition and production method conditions are the same as in Example 2.

[0076] Comparative Example 2

[0077] Compared with Example 2, the difference in Comparative Example 2 is that the amount of frit used in the raw material ratio of the jade ceramic slab is greater than 40 parts, that is, 45 parts. The other formula composition and production method conditions are the same as in Example 2.

[0078] Comparative Example 3

[0079] Compared with Example 2, Comparative Example 3 differs in that the frit formulation in the raw material ratio of the jade ceramic slab is different, adopting the frit formulation of Example C of Patent No. ZL202111203717.2. The raw materials used in the frit include albite, potassium feldspar, quartz powder, alumina, zinc oxide, calcite, calcined talc, soda ash, barium carbonate, calcium fluoride, apatite, etc., which are mixed, melted at 1530℃, and water-quenched to obtain a crystallized frit. The frit, by mass percentage, includes: 67.80% SiO2, 13.01% Al2O3, 3.02% CaO, 3.11% MgO, 0.48% K2O, 3.00% Na2O, 2.15% ZnO, 3.07% BaO, 1.48% P2O5, and 2.88% CaF2. For the remaining formula composition and preparation method conditions, please refer to Example 2.

[0080] Comparative Example 4

[0081] Compared with Example 2, the difference in Comparative Example 4 is that in the preparation process of jade ceramic slabs, in step (1) ball milling, the step of cleaning the bucket of the loader, the feeder, and the conveyor belt before ball milling is omitted. The balls used in ball milling are conventional ball mills. The slurry after ball milling, sieving, and iron removal is transported into a conventional slurry tank for homogenization and aging. For the remaining formulation and preparation method conditions, please refer to Example 2.

[0082] Comparative Example 5

[0083] Compared with Example 2, the difference in Comparative Example 5 is that in the preparation process of the jade ceramic slab, the spray drying process parameters in step (3) of the powder spraying process are as follows: moisture content is controlled at 9-10.4%; bulk density is 0.93-0.96; particle size distribution range: 20 mesh ≤ 2%, 40 mesh 40-50%, 60 mesh 35-50%, 100 mesh ≤ 15%, and below 100 mesh < 2%. The remaining formulation and preparation method conditions are the same as in Example 2.

[0084] Comparative Example 6

[0085] Compared with Example 2, the difference of Comparative Example 6 is that in the preparation process of jade ceramic rock slab, in step (3), conventional coal is used as fuel for the spray drying tower. After being sprayed with powder in the spray drying tower, it is stored in a special stainless steel powder silo through a clean conveying system.

[0086] Comparative Example 7

[0087] We purchased similar jade-like ceramic slabs from Guangdong Cuibeika Building Materials Technology Co., Ltd., specifically the jade-like fish-belly white ceramic slab.

[0088] Effect evaluation and performance testing

[0089] 1. For the ceramic slabs of Example 2 and Comparative Examples 1-7, the performance indicators such as green drying strength, whiteness after firing, light transmittance, maximum wave deformation, and modulus of rupture were measured in accordance with GB / T 4100-2015. The test items and results are shown in Table 2.

[0090] Table 2 Performance test data of ceramic slabs in Example 2 and Comparative Examples 1-7

[0091]

[0092]

[0093] As shown in the table above, the jade-like ceramic slabs of this embodiment maintain the physical and chemical properties of the green body, such as flexural strength, modulus of rupture, and firing temperature range. At the same time, they have been improved in terms of high whiteness (whiteness of the green body ≥ 85 degrees), light transmittance (light transmittance ≥ 6.5%), and a more delicate and warm texture. This makes the ceramic slabs and slabs more translucent and warm under light, with a more delicate texture, making them more suitable for use in scenarios with certain lighting effects. Figure 1 This is an image of the ceramic rock slab from Example 2 illuminated from bottom to top by a light source. Figure 2 The images show the ceramic slabs of Comparative Example 7 illuminated from the same light source from bottom to top. As can be seen from the images, the ceramic slab of this invention has better light transmittance; after light passes through, it appears lighter in the center and darker around the edges, with a clear boundary line and no glare.

[0094] Compared with Example 2, the ceramic slab formulation of Comparative Examples 1-2 differs in that the amount of raw material frit used in the blank exceeds the range of this application. The whiteness of the blank in Comparative Example 1 with less than 20 parts is lower after firing, and the light transmittance and visual light perception are worse. The green body of Comparative Example 2 with more than 40 parts has lower drying strength, larger maximum wave deformation, and smaller modulus of rupture.

[0095] Compared with Example 2, the ceramic slab of Comparative Example 3 differs in that it uses a frit of a similar product instead of the frit of this application. Data shows that the light transmittance and the visual light perception of Comparative Example 3 are worse.

[0096] Compared with Example 2, the ceramic slab in Comparative Example 4 differs in that, in step (1) of the preparation method, the step of cleaning the bucket of the loader, the feeder, and the conveyor belt before ball milling is omitted. Conventional ball mills are used during ball milling, and the slurry after ball milling, sieving, and iron removal is fed into a conventional slurry tank for homogenization and aging. Data shows that after firing, the whiteness, translucency, and visual gloss of the green body in Comparative Example 4 decreased.

[0097] Compared with Example 2, the ceramic slab of Comparative Example 5 differs in that the spray drying process parameters in step (3) of the preparation method are as follows: moisture content is controlled at 9-10.4%; bulk density is 0.93-0.96; particle size distribution range: 20 mesh ≤ 2%, 40 mesh 40-50%, 60 mesh 35-50%, 100 mesh ≤ 15%, and below 100 mesh < 2%. The data shows that the performance indicators of Comparative Example 5 and Example 2 after firing are similar, but due to the higher moisture content, Comparative Example 5 is not suitable for pressing and molding with the existing System press.

[0098] Compared with Example 2, the ceramic slab of Comparative Example 6 differs in that in the powder spraying process of step (3) of the preparation method, conventional coal is used as fuel for the spray drying tower. After being sprayed with powder in the spray drying tower, it is stored in a special stainless steel powder silo through a clean conveying system. Data shows that the powder of Comparative Example 6 contains impurities such as coal ash. After the green body is fired, the whiteness becomes lower, the light transmittance becomes worse, and the visual light perception becomes worse.

[0099] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A blank for an 80-degree ultra-white translucent jade-like ceramic slab, characterized in that, The material includes a blank layer, which is composed of the following blanks in parts by weight: 15-30 parts of ultra-white kaolin, 5-10 parts of high-white plastic clay, 30-60 parts of high-white potassium sodium sand, 20-40 parts of frit, 0-5 parts of calcined talc, and 0.1-1 parts of blank reinforcing agent. The frit comprises the following components by mass percentage: 50.0–65.0% SiO2, 14.0–19.0% Al2O3, 3.0–12.0% CaO, 0.5–4.0% K2O, 3.0–6.0% Na2O, 2.0–6.0% ZnO, 2.0–6.0% SrO, and 5.0–15% BaO; The iron content of the super-white kaolin and the high-white plastic clay is ≤0.2%; the iron content of the high-white potassium sodium sand is ≤0.1%; and the dry flexural strength of the high-white plastic clay is 8-15 MPa.

2. The blank for the 80-degree ultra-white translucent jade-like ceramic slab as described in claim 1, characterized in that, The blank also includes colorant, which accounts for 0.5% to 4% of the total mass of the blank.

3. A method for preparing the blank of the 80-degree ultra-white translucent jade-like ceramic slab as described in claim 1 or 2, characterized in that, The process includes the following steps: (1) Ball milling process: according to the weight, the raw materials for 80-degree ultra-white translucent jade ceramic slabs are put into the ball mill in sequence, then water is added, and after ball milling, sieving, and iron removal, they are put into a clean slurry tank to obtain slurry. (2) Aging process: The slurry obtained from the ball milling process is poured into the slurry tank, stirred evenly, and aged for more than 48 hours; (3) Spraying process: The aged slurry from the aging process is fed into the spray drying tower through the spray tower mud pump. After spray drying in the spray drying tower, the body powder of 80-degree ultra-white translucent jade ceramic rock slab is obtained.

4. The preparation method of the 80-degree ultra-white translucent jade-like ceramic slab as described in claim 3, characterized in that, In step (1), before ball milling, the bucket, feeder and conveyor belt of the loader need to be cleaned. The balls used in ball milling are high-alumina balls. After ball milling, sieving and iron removal, the slurry is transported into the slurry pool where the tiles are completely laid, and waits for homogenization and aging.

5. The preparation method of the 80-degree ultra-white translucent jade-like ceramic slab as described in claim 3, characterized in that, In step (1), the ball milling process parameters are: water volume is 34-37% of the total weight of dry material, and the specific gravity of the output slurry is 1.65-1.72 g / cm³. 3 Flow rate 55-85 seconds, fineness of 10,000-mesh sieve 0.2-0.

8.

6. The preparation method of the 80-degree ultra-white translucent jade-like ceramic slab as described in claim 3, characterized in that, In step (3), natural gas is used as fuel for the spray drying tower. After being sprayed with powder in the spray drying tower, the powder is stored in a dedicated stainless steel powder silo through a clean conveying system.

7. The preparation method of the 80-degree ultra-white translucent jade-like ceramic slab as described in claim 3, characterized in that, In step (3), the spray drying process parameters in the powder spraying process are: moisture content controlled at 7-7.5%; bulk density at 0.8-0.9 g / cm3; and powder particle size distribution range as follows: 30 mesh 3-8%, 40 mesh 20-40%, 60 mesh 35-55%, and 120 mesh <3%.

8. The preparation method of the 80-degree ultra-white translucent jade-like ceramic slab as described in claim 3, characterized in that, It also includes (4) the process of adding colorant: after ball milling and aging, the slurry is mixed with colorant and stirred evenly to obtain colored line slurry; then it is sprayed with powder to obtain colored line powder.

9. A type of 80-degree ultra-white translucent jade-like ceramic slab, characterized in that, The blank of the ceramic slab is the blank of the 80-degree ultra-white translucent jade ceramic slab as described in claim 1 or 2.

10. A method for preparing an 80-degree ultra-white translucent jade-like ceramic slab, characterized in that, include: Billet preparation methods and billet forming methods; The blank preparation method is the blank preparation method for the 80-degree ultra-white translucent jade ceramic slab as described in any one of claims 3 to 8; The billet forming method includes the following steps: (5) Fabric application process: The blank powder and / or colored line material are applied according to the preset pattern by a digital fabric application machine, and after pressing and molding, the blank is dried. (6) Glazing process: Apply surface glaze to the dried body in step (5); inkjet print pattern layer, and align the pattern layer with the fabric layer in step (5) in color and position. (7) Polishing and waxing process: The blank obtained in step (6) is fired, the surface of the blank is treated, and polishing and waxing are performed as needed; or the blank obtained in step (6) is glazed, fired, and the glaze is polished and waxed as needed.

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