Ceramic rock plate with decorative effect and production process thereof

Abstract

The application discloses a kind of ceramic rock plate with decorative effect and production process thereof, belong to ceramic technical field.The rock plate is composed of body layer, bottom glaze layer, face glaze layer and inkjet pattern layer, after firing, through oxygen nitrogen plasma activation, aluminum salt and ammonia source compound hydrothermal reaction, high temperature calcination and silane derivative impregnation solidification, form micro-nano rough and low surface energy synergistic protective layer.Body is with wollastonite, quartz sand and the like as raw material, bottom glaze and face glaze adopt feldspar-quartz-nepheline system;After firing, after plasma treatment and hydrothermal generation acicular alumina, then introduce silane derivative to realize super-hydrophobic and wear-resistant double function.Compared with prior art, the application is anti-fouling, wear-resistant, and reaches national standard 5 level, process is simple, can be directly connected to existing production line, suitable for high-end wall and floor decoration.

Description

Technical Field

[0001] This invention relates to the field of ceramic technology, and in particular to a decorative ceramic slab and its production process. Background Technology

[0002] Ceramic slabs, as a high-performance building material, are widely used in the architectural decoration field due to their excellent wear resistance, corrosion resistance, and decorative effect. However, existing ceramic slabs still have certain limitations in terms of stain resistance and wear resistance. For example, while existing ceramic slabs have a certain gloss and wear resistance, their stain resistance still needs improvement. Other ceramic slabs with transparent linear textures that mimic stone decoration, although visually appealing, are prone to surface contamination and difficult to clean in practical applications, affecting their service life and aesthetics.

[0003] Furthermore, existing ceramic slab production processes are quite complex, typically requiring multiple steps, including body preparation, glaze formulation, glazing, and firing. These steps are not only time-consuming and energy-intensive but also demand high-level equipment, increasing production costs. Meanwhile, some post-processing methods in existing technologies, such as simple coatings, while improving surface properties to some extent, often suffer from insufficient adhesion and durability, failing to meet the requirements for long-term use.

[0004] Chinese patent application CN114276016A discloses a soft-light glazed ceramic slab and its preparation method. The soft-light glaze of this invention is achieved by selecting suitable... and By adjusting the formula and adding CaO, MgO, ZnO, and SrO as composite fluxing matting agents, a natural soft-gloss effect was achieved on the soft-gloss glazed ceramic slab, resulting in a smooth and delicate surface with a gloss level of [missing information]. It also exhibits excellent wear resistance. Furthermore, this technical solution simplifies the process of preparing flexible polished bricks, saves processing time, and offers high efficiency and economic benefits.

[0005] Another Chinese patent application, CN118420332A, discloses a ceramic slab with a large-area transparent linear texture that mimics the decorative effect of stone, and its preparation method. This invention uses inkjet printing to push aside the ink, thus removing the glaze from the surface of the transparent powder and preventing the transparent powder layer from being covered by the glaze layer, thereby obtaining a ceramic slab with inkjet patterns and transparent linear texture decoration.

[0006] While the two patents mentioned above have made significant progress in achieving soft-light effects and stone-like decorative effects, they still have shortcomings in terms of stain resistance and wear resistance. Although the surface of the soft-light glazed ceramic slab is delicate and smooth, it is easily contaminated by oil and stains and is difficult to clean. While the stone-like decorative ceramic slab has a superior visual effect, in practical applications, its surface is easily contaminated and difficult to clean, affecting its service life and aesthetics. Summary of the Invention

[0007] In order to overcome the shortcomings of the prior art, the present invention aims to provide a ceramic slab with decorative effect and its production process.

[0008] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0009] A decorative ceramic slab: the ceramic slab comprises three layers from the inside out, namely, a body layer, a base glaze layer, and a top glaze layer; the ceramic slab also includes an inkjet pattern layer, which covers the surface of the top glaze layer; the ceramic slab undergoes post-processing after firing.

[0010] The post-processing method is as follows:

[0011] The polished slab is first activated by oxygen-nitrogen plasma, then immersed in a treatment solution composed of aluminum sulfate octadecylhydrate and an ammonia source compound. After hydrothermal reaction, it is taken out, dried, and calcined. Subsequently, it is immersed in a tetrahydrofuran coating solution containing silane derivatives and a curing agent, and cured to obtain the ceramic slab.

[0012] The production process of a decorative ceramic slab is as follows:

[0013] Step 1, Green Body Preparation: The raw materials for the green body layer are composed of the following mass percentages: wollastonite 35%-45%, quartz sand 15%-20%, potassium feldspar powder 5%-15%, mica powder 4%-8%, bauxite 4%-8%, pyrophyllite 2%-6%, sodium borate 1%-3%, zirconia ceramic sand 3%-7%, diopside 4%-8%, high clay 2%-4%, ceramic dispersant 0.3%-0.8%, sodium silicate 0.3%-0.8%;

[0014] The raw materials and water are mixed at a mass ratio of 2-4:1, refined by ball milling, and spray dried to obtain the green body material.

[0015] Molding and drying: The billet is pressed into shape under hydraulic pressure of 300-400 bar and dried for later use;

[0016] Step 2, Glaze preparation

[0017] (1) Preparation of base glaze:

[0018] The raw materials are composed of the following mass percentages: albite 20%-40%, quartz 25%-35%, nepheline syenite 10%-20%, kaolinite 5%-15%, dolomite 5%-10%, and anorthite 5%-10%.

[0019] Processing technique, by weight: 80-120 parts of raw material, 20-40 parts of water, 0.1-0.3 parts of sodium polyacrylate, and 0.1-0.5 parts of sodium tripolyphosphate, ball milled and sieved, then aged;

[0020] (2) Preparation of surface glaze:

[0021] The raw materials are composed of the following mass percentages: nepheline syenite 30%-35%, spodumene 12%-20%, wollastonite 10%-20%, diopside 5%-15%, apatite 2%-6%, barium feldspar 1%-5%, quartz 5%-10%, calcined α-alumina powder 2%-6%, calcined zinc oxide 3%-8%, and strontium carbonate 1%-5%.

[0022] Processing technology: ball milling, sieving, and aging process for the same base glaze;

[0023] Step 3: Glazing and Decoration

[0024] Base glaze layer: applied to the surface of the body;

[0025] Top glaze layer: covers the base glaze layer;

[0026] Inkjet pattern: Digital inkjet printing is performed on the surface of the glaze layer to form decorative textures;

[0027] Step 4: Firing and Post-processing

[0028] High-temperature firing: the glaze layer is melted and vitrified, and after firing, it is ground and polished, and then post-processed to obtain the ceramic slab.

[0029] In step 1, the moisture content of the green body material obtained by spray drying is 6%-7%, and the particle size is ≤0.3-0.8% after passing through a 300-400 mesh sieve.

[0030] In step 2, the base glaze is prepared by ball milling for 5-8 hours until the fineness is ≤0.5-1% on a 300-400 mesh sieve, and then aged for 24-72 hours.

[0031] The specific gravity of the base glaze layer applied to the surface of the body in step 3 is 1.8-2.0 g / m³, and the dosage is 400-600 g / m².

[0032] The top glaze layer in step 3 covers the bottom glaze layer, with a specific gravity of 1.6-2.0 g / m³ and a dosage of 350-450 g / m².

[0033] In step 4, the high-temperature firing process involves a stepped temperature increase: 20-40℃ / min to 480-520℃, 15-25℃ / min to 800-900℃, and 5-15℃ / min to 1000-1150℃, with firing at 1000-1150℃ for 20-80 minutes.

[0034] The post-processing method is as follows, in parts by weight:

[0035] The polished slab is placed in a plasma device containing oxygen and nitrogen at a volume ratio of 0.5-2:1, with a processing power of 200-400W and a pressure of 40-60Pa, for 10-20 minutes. 1-2 parts of aluminum sulfate octadecylhydrate and 10-15 parts of an ammonia source compound are added to 80-120 parts of water and mixed thoroughly to obtain a treatment solution. The plasma-treated slab is then immersed in the treatment solution and treated at 180-220℃ for 10-30 hours under sealed conditions. After removal, it is dried at 80-120℃ for 1-3 hours and calcined at 550-600℃ for 1-3 hours. 1-2 parts of a silane derivative and 0.2-0.4 parts of a curing agent are added to 80-100 parts of tetrahydrofuran and stirred thoroughly to obtain a coating solution. The calcined slab is then immersed in the coating solution for 10-20 minutes, and then removed and cured at 100-120℃ for 0.5-3 hours to obtain the ceramic slab.

[0036] The ammonia source compound is at least one of hexamethylenetetramine, diammonium hydrogen phosphate, and triethanolamine;

[0037] The silane derivative is at least one of methyltrimethoxysilane, perfluorodecyltriethoxysilane, and octamethylcyclotetrasiloxane.

[0038] The roles of each substance in the post-processing method are as follows:

[0039] Aluminum sulfate octahydrate reacts with an ammonia source to form micro-nano structures, which enhance surface roughness.

[0040] Ammonia-based compounds provide an alkaline environment that promotes the growth of needle-shaped alumina.

[0041] Silane derivatives form low surface energy coatings, imparting superhydrophobicity.

[0042] The curing agent promotes the cross-linking and curing of silanes, thereby improving the durability of the coating.

[0043] Tetrahydrofuran was used as a solvent to uniformly disperse silane and curing agent.

[0044] Compared with existing technologies, it has the following advantages:

[0045] 1) This invention constructs a synergistic protective layer of micro-nano structure and low surface energy coating on the surface of ceramic slab through innovative post-processing technology, which significantly enhances the anti-fouling and wear resistance of ceramic slab, enabling it to reach the highest level in both stain resistance and wear resistance tests.

[0046] 2) The micro-nano structure and low surface energy coating formed by the post-processing process of this invention not only improve the surface's anti-fouling ability, but also enhance the durability of the ceramic slab, enabling it to maintain stable performance under harsh environments such as high temperature and friction, thereby reducing maintenance costs.

[0047] 3) The production process of this invention is simple and easy to operate. All raw materials used are commercially available products, which can be directly connected to the existing ceramic production process without the need for additional complex equipment or process adjustments. It has high industrial application value. Detailed Implementation

[0048] Main source of materials:

[0049] Hardener, brand name: SYLGARD® 184, Merck.

[0050] Ceramic dispersant, model: DURAMAX D-3019, brand: Dow Chemical.

[0051] Zirconia ceramic sand, model: B20-B505, Dongguan Lianzhiyan Surface Treatment Materials Co., Ltd.

[0052] Calcined α-alumina powder, model: FR-YHLQ, Henan Fengkai Refractory Materials Co., Ltd.

[0053] Polydimethylsiloxane, model: PMX-200 1000CS, brand: Dow Corning, USA.

[0054] All other raw materials used in the embodiments and comparative examples of this invention are commercially available products.

[0055] Example 1

[0056] The production process of a decorative ceramic slab is as follows:

[0057] Step 1, Green body preparation: The raw materials for the green body layer are composed of the following mass percentages: wollastonite 39%, quartz sand 18%, potassium feldspar powder 10%, mica powder 6%, bauxite 6%, pyrophyllite 4%, sodium borate 2%, zirconia ceramic sand 5%, diopside 6%, high clay 3%, ceramic dispersant 0.5%, sodium silicate 0.5%;

[0058] The raw materials and water were mixed at a mass ratio of 3:1, refined by ball milling, and spray-dried to obtain the green body material. The controlled parameters were: moisture 6%, particle size ≤0.5% residue on a 325-mesh sieve.

[0059] Molding and Drying: The billet is pressed into shape under 320 bar hydraulic pressure and dried for later use;

[0060] Step 2, Glaze preparation

[0061] (1) Preparation of base glaze:

[0062] The base glaze raw materials are composed of the following mass percentages: 30% sodium feldspar, 29% quartz, 15% nepheline syenite, 10% kaolinite, 8% dolomite, and 8% calcium feldspar;

[0063] Processing technology, by weight: 100 parts of raw material, 30 parts of water, 0.2 parts of sodium polyacrylate, 0.3 parts of sodium tripolyphosphate, ball mill for 6 hours until the fineness is ≤0.7% on a 325 mesh sieve, and then age for 48 hours;

[0064] (2) Preparation of surface glaze

[0065] The surface glaze raw materials are composed of the following mass percentages: nepheline syenite 32%, spodumene 16%, wollastonite 15%, diopside 10%, apatite 4%, barium feldspar 3%, quartz 8%, calcined α-alumina powder 4%, calcined zinc oxide 5.5%, and strontium carbonate 2.5%.

[0066] Processing technology: ball milling, sieving, and aging process for the same base glaze;

[0067] Step 3: Glazing and Decoration

[0068] Base glaze layer: applied to the surface of the body, specific gravity 1.92 g / m³, dosage 500 g / m²;

[0069] Top glaze layer: covers the base glaze layer, specific gravity 1.80 g / m³, dosage 390 g / m²;

[0070] Inkjet pattern: Digital inkjet printing is performed on the surface of the glaze layer to form decorative textures;

[0071] Step 4: Firing and Post-processing

[0072] High-temperature firing: The temperature is increased in stages: 30℃ / min to 500℃, 20℃ / min to 850℃, and 10℃ / min to 1100℃. The glaze is fired at 1100℃ for 50 minutes to melt and vitrify the glaze. After firing, the edges are ground and polished, and then post-processed to obtain the ceramic slab.

[0073] The post-processing method is as follows, in parts by weight:

[0074] The polished slab was placed in a plasma device containing oxygen and nitrogen in a 1:1 volume ratio, with a processing power of 300W and a pressure of 50Pa, for 15 minutes. 1.8 parts of aluminum sulfate octadecylhydrate and 12 parts of diammonium hydrogen phosphate were added to 100 parts of water and mixed thoroughly to obtain a treatment solution. The plasma-treated slab was then immersed in the treatment solution and treated at 200°C for 20 hours under sealed conditions. After removal, it was dried at 100°C for 2 hours and calcined at 560°C for 2 hours. 1.5 parts of perfluorodecyltriethoxysilane and 0.3 parts of curing agent were added to 90 parts of tetrahydrofuran and stirred thoroughly to obtain a coating solution. The calcined slab was then immersed in the coating solution for 15 minutes and then cured at 110°C for 1 hour to obtain the ceramic slab.

[0075] Example 2

[0076] The production process of a decorative ceramic slab is basically the same as that of Example 1, except that the post-processing method is different.

[0077] The post-processing method is as follows, in parts by weight:

[0078] The polished slab was placed in a plasma device containing oxygen and nitrogen in a 1:1 volume ratio, with a processing power of 300W and a pressure of 50Pa, for 15 minutes. 1.8 parts of aluminum sulfate octadecylhydrate and 12 parts of triethanolamine were added to 100 parts of water and mixed thoroughly to obtain a treatment solution. The plasma-treated slab was then immersed in the treatment solution and treated at 200°C for 20 hours under sealed conditions. After removal, it was dried at 100°C for 2 hours and calcined at 560°C for 2 hours. 1.5 parts of perfluorodecyltriethoxysilane and 0.3 parts of curing agent were added to 90 parts of tetrahydrofuran and stirred thoroughly to obtain a coating solution. The calcined slab was then immersed in the coating solution for 15 minutes and then cured at 110°C for 1 hour to obtain the ceramic slab.

[0079] Example 3

[0080] The production process of a decorative ceramic slab is basically the same as that of Example 1, except that the post-processing method is different.

[0081] The post-processing method is as follows, in parts by weight:

[0082] The polished slab was placed in a plasma device containing oxygen and nitrogen in a 1:1 volume ratio, with a processing power of 300W and a pressure of 50Pa, for 15 minutes. 1.8 parts of aluminum sulfate octadecylhydrate and 12 parts of hexamethylenetetramine were added to 100 parts of water and mixed thoroughly to obtain a treatment solution. The plasma-treated slab was then immersed in the treatment solution and treated at 200°C for 20 hours under sealed conditions. After removal, it was dried at 100°C for 2 hours and calcined at 560°C for 2 hours. 1.5 parts of perfluorodecyltriethoxysilane and 0.3 parts of curing agent were added to 90 parts of tetrahydrofuran and stirred thoroughly to obtain a coating solution. The calcined slab was then immersed in the coating solution for 15 minutes and then cured at 110°C for 1 hour to obtain the ceramic slab.

[0083] Example 4

[0084] The production process of a decorative ceramic slab is basically the same as that of Example 1, except that the post-processing method is different.

[0085] The post-processing method is as follows, in parts by weight:

[0086] The polished slab was placed in a plasma device containing oxygen and nitrogen in a 1:1 volume ratio, with a processing power of 300W and a pressure of 50Pa, for 15 minutes. 1.8 parts of aluminum sulfate octadecylhydrate and 12 parts of diammonium hydrogen phosphate were added to 100 parts of water and mixed thoroughly to obtain a treatment solution. The plasma-treated slab was then immersed in the treatment solution and treated at 200°C for 20 hours under sealed conditions. After removal, it was dried at 100°C for 2 hours and calcined at 560°C for 2 hours. 1.5 parts of octamethylcyclotetrasiloxane and 0.3 parts of curing agent were added to 90 parts of tetrahydrofuran and stirred thoroughly to obtain a coating solution. The calcined slab was then immersed in the coating solution for 15 minutes and then cured at 110°C for 1 hour to obtain the ceramic slab.

[0087] Example 5

[0088] The production process of a decorative ceramic slab is basically the same as that of Example 1, except that the post-processing method is different.

[0089] The post-processing method is as follows, in parts by weight:

[0090] The polished slab was placed in a plasma device containing oxygen and nitrogen in a 1:1 volume ratio, with a processing power of 300W and a pressure of 50Pa, for 15 minutes. 1.8 parts of aluminum sulfate octadecylhydrate and 12 parts of diammonium hydrogen phosphate were added to 100 parts of water and mixed thoroughly to obtain a treatment solution. The plasma-treated slab was then immersed in the treatment solution and treated at 200°C for 20 hours under sealed conditions. After removal, it was dried at 100°C for 2 hours and calcined at 560°C for 2 hours. 1.5 parts of methyltrimethoxysilane and 0.3 parts of curing agent were added to 90 parts of tetrahydrofuran and stirred thoroughly to obtain a coating solution. The calcined slab was then immersed in the coating solution for 15 minutes and then cured at 110°C for 1 hour to obtain the ceramic slab.

[0091] Comparative Example 1

[0092] The production process of a decorative ceramic slab is basically the same as that of Example 1, except that the post-processing method is different.

[0093] The post-processing method is as follows, in parts by weight:

[0094] The polished slab was placed in a plasma device containing oxygen and nitrogen in a 1:1 volume ratio, with a processing power of 300W and a pressure of 50Pa, for 15 minutes. 1.8 parts of aluminum sulfate octadecylhydrate and 12 parts of urea were added to 100 parts of water and mixed thoroughly to obtain a treatment solution. The plasma-treated slab was then immersed in the treatment solution and treated at 200°C for 20 hours under sealed conditions. After removal, it was dried at 100°C for 2 hours and calcined at 560°C for 2 hours. 1.5 parts of perfluorodecyltriethoxysilane and 0.3 parts of curing agent were added to 90 parts of tetrahydrofuran and stirred thoroughly to obtain a coating solution. The calcined slab was then immersed in the coating solution for 15 minutes and then cured at 110°C for 1 hour to obtain the ceramic slab.

[0095] Comparative Example 2

[0096] The production process of a decorative ceramic slab is basically the same as that of Example 1, except that the post-processing method is different.

[0097] The post-processing method is as follows, in parts by weight:

[0098] The polished slab was placed in a plasma device containing oxygen and nitrogen in a 1:1 volume ratio, with a processing power of 300W and a pressure of 50Pa, for 15 minutes. 1.8 parts of aluminum sulfate octadecylhydrate and 12 parts of diammonium hydrogen phosphate were added to 100 parts of water and mixed thoroughly to obtain a treatment solution. The plasma-treated slab was then immersed in the treatment solution and treated at 200°C for 20 hours under sealed conditions. After removal, it was dried at 100°C for 2 hours and calcined at 560°C for 2 hours. 1.5 parts of polydimethylsiloxane and 0.3 parts of curing agent were added to 90 parts of tetrahydrofuran and stirred thoroughly to obtain a coating solution. The calcined slab was then immersed in the coating solution for 15 minutes and then cured at 110°C for 1 hour to obtain the ceramic slab.

[0099] Comparative Example 3

[0100] The production process of a decorative ceramic slab is basically the same as that of Example 1, except that the post-processing method is not used.

[0101] Test Example 1

[0102] Stain resistance:

[0103] The stain resistance was tested in accordance with the national standard GB / T 3810.14-2016 "Test Methods for Ceramic Tiles Part 14: Determination of Stain Resistance". The stain resistance of the ceramic slabs prepared in the embodiments and comparative examples of this invention was tested. The test principle is to contact the front of the ceramic slab with a staining agent (chrome green, iodine, olive oil, etc.) and let it act for a certain period of time. Then, the front of the ceramic slab was cleaned according to the prescribed cleaning method. The surface changes were observed to determine the stain resistance of the brick. The grades were divided into 1 to 5, with grade 5 having the best stain resistance.

[0104] The test results are shown in Table 1.

[0105] Table 1

[0106]

[0107] Test Example 2

[0108] Abrasion resistance:

[0109] Wear tests were conducted on the ceramic rock slabs prepared in the embodiments and comparative examples of the present invention using a reciprocating friction and wear testing machine under test conditions of 50 N test load, 4 mm stroke, 2 Hz frequency and 40 min duration. The friction and wear performance was measured, and the wear resistance was measured by the wear volume.

[0110] The test results are shown in Table 2.

[0111] Table 2

[0112]

[0113] This invention constructs a stable antifouling interface layer through a multi-step synergistic process: First, oxygen-nitrogen plasma is used to activate the surface, forming active sites at the micro-nano level; then, aluminum salts and ammonia source compounds (preferably diammonium hydrogen phosphate) react under high-temperature hydrothermal conditions to generate needle-like micro-nano composite structures, significantly improving surface roughness; finally, hydrophobic modification with silane derivatives (preferably perfluorodecyltriethoxysilane) forms a low surface energy coating on the rough surface, enabling the ceramic slab surface to achieve a stable hydrophobic state. This hierarchical structure prevents pollutants from penetrating through the gas film, thus achieving long-lasting self-cleaning and antifouling performance.

[0114] Example 1 uses a combination of diammonium hydrogen phosphate as an ammonia source compound and perfluorodecyltriethoxysilane as a silane derivative, which produces the best results in the post-treatment process, significantly improving the stain resistance and wear resistance of the ceramic slab. The stain resistance reaches the highest performance level of 5, with the smallest wear volume. This is due to the fact that diammonium hydrogen phosphate optimizes the chemical reaction of the surface treatment solution, forming a dense inorganic protective layer, while perfluorodecyltriethoxysilane provides excellent hydrophobicity and stain resistance, which together enhance the durability of the slab.

Claims

1. A ceramic slab with decorative effect, characterized in that, The ceramic slab comprises three layers from the inside out: a body layer, a base glaze layer, and a top glaze layer. The ceramic slab also includes an inkjet pattern layer, which covers the surface of the top glaze layer. The ceramic slab undergoes post-processing after firing. The post-processing method is as follows, in parts by weight: The polished slab is placed in a plasma device containing oxygen and nitrogen at a volume ratio of 0.5-2:1, with a processing power of 200-400W and a pressure of 40-60Pa, for 10-20 minutes. 1-2 parts of aluminum sulfate octadecylhydrate and 10-15 parts of an ammonia source compound are added to 80-120 parts of water and mixed thoroughly to obtain a treatment solution. The plasma-treated slab is then immersed in the treatment solution and treated at 180-220℃ for 10-30 hours under sealed conditions. After removal, it is dried at 80-120℃ for 1-3 hours and calcined at 550-600℃ for 1-3 hours. 1-2 parts of a silane derivative and 0.2-0.4 parts of a curing agent are added to 80-100 parts of tetrahydrofuran and stirred thoroughly to obtain a coating solution. The calcined slab is then immersed in the coating solution for 10-20 minutes, and then removed and cured at 100-120℃ for 0.5-3 hours to obtain the ceramic slab. The ammonia source compound is at least one of hexamethylenetetramine, diammonium hydrogen phosphate, and triethanolamine; The silane derivative is at least one of methyltrimethoxysilane, perfluorodecyltriethoxysilane, and octamethylcyclotetrasiloxane.

2. A process for producing ceramic slabs with decorative effects as described in claim 1, characterized in that, The production process is as follows: Step 1, Green Body Preparation: The raw materials for the green body layer are composed of the following mass percentages: wollastonite 35%-45%, quartz sand 15%-20%, potassium feldspar powder 5%-15%, mica powder 4%-8%, bauxite 4%-8%, pyrophyllite 2%-6%, sodium borate 1%-3%, zirconia ceramic sand 3%-7%, diopside 4%-8%, high clay 2%-4%, ceramic dispersant 0.3%-0.8%, and sodium silicate 0.3%-0.8%. The raw materials and water are mixed at a mass ratio of 2-4:1, refined by ball milling, and spray dried to obtain the green body material. Molding and drying: The billet is pressed into shape under hydraulic pressure of 300-400 bar and dried for later use; Step 2, Glaze preparation (1) Preparation of base glaze The raw materials are composed of the following percentages by mass: 20%-40% sodium feldspar, 25%-35% quartz, 10%-20% nepheline syenite, 5%-15% kaolinite, 5%-10% dolomite, and 5%-10% anorthite; Processing technique, by weight: 80-120 parts of raw material, 20-40 parts of water, 0.1-0.3 parts of sodium polyacrylate and 0.1-0.5 parts of sodium tripolyphosphate, ball milled and sieved, then aged; (2) Preparation of surface glaze The raw materials are composed of the following mass percentages: nepheline syenite 30%-35%, spodumene 12%-20%, wollastonite 10%-20%, diopside 5%-15%, apatite 2%-6%, barium feldspar 1%-5%, quartz 5%-10%, calcined α-alumina powder 2%-6%, calcined zinc oxide 3%-8%, and strontium carbonate 1%-5%; Processing technology: ball milling, sieving, and aging process for the same base glaze; Step 3: Glazing and Decoration Base glaze layer: applied to the surface of the body; Top glaze layer: covers the base glaze layer; Inkjet pattern: Digital inkjet printing is performed on the surface of the glaze layer to form decorative textures; Step 4: Firing and Post-processing High-temperature firing: the glaze layer is melted and vitrified, and after firing, it is ground and polished, and then post-processed to obtain the ceramic slab.

3. The production process of the decorative ceramic slab as described in claim 2, characterized in that, In step 1, the moisture content of the green body material obtained by spray drying is 6%-7%, and the particle size residue on a 300-400 mesh sieve is ≤0.3-0.8%.

4. The production process of the decorative ceramic slab as described in claim 2, characterized in that, In step 2, the base glaze is prepared by ball milling for 5-8 hours until the fineness is ≤0.5-1% on a 300-400 mesh sieve, and then aged for 24-72 hours.

5. The production process of the decorative ceramic slab as described in claim 2, characterized in that, The specific gravity of the base glaze layer applied to the surface of the body in step 3 is 1.8-2.0 g / cm³. 3 Dosage: 400-600 g / m 2 .

6. The production process of the ceramic slab with decorative effect as described in claim 2, characterized in that, The top glaze layer in step 3 covers the bottom glaze layer, with a specific gravity of 1.6-2.0 g / cm³. 3 Dosage: 350-450 g / m 2 .

7. The production process of the ceramic slab with decorative effect as described in claim 2, characterized in that, In step 4, the high-temperature firing process involves a stepped temperature increase: 20-40℃ / min to 480-520℃, 15-25℃ / min to 800-900℃, and 5-15℃ / min to 1000-1150℃, with firing at 1000-1150℃ for 20-80 minutes.

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