Silver foil dry granular glaze, ceramic tile with silver foil decoration effect and preparation method thereof

Abstract

The silver foil dry granular glaze, ceramic tile with silver foil decoration effect and preparation method thereof belong to the technical field of ceramic production process. The silver foil dry granular glaze is prepared by introducing mica sheet particles and appropriately coating the mica sheet particles with silver foil base paste, which greatly improves the firing temperature of the mica sheet particles, and the mica sheet particles remain unchanged in shape after high-temperature treatment at 1180-1220 DEG C. In addition, the process formula is optimized, so that the formula composition of the silver foil dry granular glaze directly affects the metal flash effect of the product. In addition to meeting the silver foil flash effect, the problem of high-temperature adaptation of the silver foil dry granular glaze with matte dry granular glaze, base glaze and the like is also solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of ceramic production process, and particularly relates to a silver foil dry particle glaze, a ceramic tile with a silver foil decoration effect and a preparation method thereof. BACKGROUND

[0002] Silver foil is often used to make handicrafts and decorations due to its high gloss and noble feeling. In the field of ceramics, silver foil is mainly used for post-processing of artistic ceramic products for decoration by pasting or plating silver. Since the melting point of silver foil is relatively low, the melting point of ordinary mica sheet is about 600 DEG C, and the melting point of synthetic mica sheet does not exceed 1100 DEG C, which makes it difficult for them to maintain the original design pattern and morphology during the high-temperature firing process of building ceramics, and high-temperature deformation is prone to occur. Therefore, the application of silver foil on building ceramics is less, or there are problems of weak metal luster, non-durable luster and color. In order to solve these problems and make the surface decoration of ceramic tiles present a better silver foil luster effect, we have developed a silver foil dry particle glaze with a silver foil luster effect, and successfully applied it to building ceramic tiles. SUMMARY

[0003] In view of the problems in the application of silver foil on building ceramics in the prior art, the present application provides a silver foil dry particle glaze, a ceramic tile with a silver foil decoration effect and a preparation method thereof, so that the surface decoration of ceramic tiles can present a better silver foil luster effect.

[0004] To solve the above problems, the present application realizes the following technical scheme:

[0005] The first invention purpose of the present application is:

[0006] The present application provides a silver foil dry particle glaze, which comprises a silver foil core and a silver foil base paste, and the mass ratio of the silver foil core and the silver foil base paste is 1-5:95-99.

[0007] The silver foil core is mica sheet particles, the particle size is 4-120 mesh, and the shape is sheet or granular.

[0008] The silver foil base paste comprises the following mass percentage components:

[0009] The sum of the components is 100%, and the components include quartz powder 38-48%, alumina 13-22%, calcined talc 26-30%, potassium oxide 10%-15%, cerium oxide 2-8%, and copper oxide 2-5%.

[0010] In addition, 0.15%-0.3% of sodium tripolyphosphate, 0.12-0.18% of sodium carboxymethyl cellulose and 0-2% of glaze color are added.

[0011] The second invention purpose of the present application is:

[0012] A method for preparing the silver foil dry granular glaze is provided, comprising the following steps:

[0013] S1. Preparation of silver foil base paste:

[0014] The corresponding raw materials, and additional sodium tripolyphosphate, sodium carboxymethyl cellulose, and glaze colorants, are weighed according to the proportion, and an appropriate amount of water is added. The mixture is finely ground by a ball mill to a 325 mesh residue of 0.1-0.3%, a moisture content of 23-27%, a specific gravity of 1.85-1.95 g / ml, and a flow rate of 50-100 seconds (using a 100 ml volt cup to measure the flow rate). The silver foil base paste is prepared and ready for use.

[0015] S2. Preparation of silver foil dry granular glaze:

[0016] A layer of 0.1-0.5 mm silver foil core is laid on a 20-25 mesh sieve tray using a dry granulator, and an appropriate amount of water or glue is sprayed. Then, the diluted silver foil base paste is coated on the surface and stirred evenly.

[0017] According to the needs, 1-2 or more times of re-coating are performed, followed by drying, stirring, sieving, 900-1100°C medium temperature sintering for 30 minutes, cooling, crushing, and sieving 10-40 mesh particles to prepare the silver foil dry granular glaze.

[0018] The re-coating refers to applying a layer of glaze paste.

[0019] The diluted silver foil base paste is prepared by adding an appropriate amount of water to the silver foil base paste, adjusting the specific gravity to 1.30-1.85 g / ml, and adjusting the application amount and re-coating amount to 150-400 g / m 2 The flow rate is controlled to 30-38 seconds by a 100 ml volt cup.

[0020] The glue in step S2 includes the following components by mass:

[0021] Water 100 parts, sodium carboxymethyl cellulose (CMC) 5 parts, ethylene glycol 13 parts, sodium tripolyphosphate 0.1 part, and preservative 0.12 part.

[0022] The silver foil dry granular glaze (containing silver foil core and silver foil base paste) prepared by the above method has a significantly improved firing temperature, with a mica sheet particle sintering temperature of 1180-1220°C, and good performance.

[0023] The silver foil core is coated with mica sheet particles by using a special silver foil base glaze (a glaze formula containing magnesium oxide, aluminum oxide and adding copper oxide, cerium oxide and other elements) to solve the problem of the poor high temperature resistance of mica sheet particles, so that the mica sheet particles can be used in high temperature fast firing of ceramics; and through adjustment and optimization of the organic combination of the silver foil dry particle glaze, the matte dry particle glaze and the base glaze, the problems of poor durability, poor gloss and poor stability of the silver foil gloss are solved.

[0024] A third inventive objective of the present application is:

[0025] Provided is a preparation method of a ceramic tile with a silver foil decoration effect, which comprises the following preparation steps:

[0026] S1. A body is prepared, and a base glaze is applied to the body to obtain a tile body A;

[0027] S2. A design inkjet pattern is printed on the tile body A to obtain a tile body B;

[0028] S3. The silver foil dry particle glaze described above is applied to the tile body B using a cloth machine to obtain a tile body C;

[0029] S4. Glue is applied to the tile body C using a jet printing machine to obtain a tile body D;

[0030] S5. The tile body D is sprayed with matte dry particle glaze using a glaze spraying machine to obtain a tile body E;

[0031] S6. The tile body E is subjected to high temperature firing to obtain a tile body F;

[0032] S7. The tile body F is subjected to semi-polishing and sorting inspection to obtain the ceramic tile with a silver foil decoration effect.

[0033] Further optimization of the preparation method of the ceramic tile with a silver foil decoration effect is:

[0034] The silver foil dry particle glaze: 38-70 g / m 2 The application is applied.

[0035] Further optimization of the preparation method of the ceramic tile with a silver foil decoration effect of the present application is:

[0036] The base glaze comprises the following raw material components by mass percentage:

[0037] Potassium feldspar powder 33-45%, air knife kaolin 10-15%, calcite 8-12%, wollastonite powder 3-6%, quartz powder 4-8%, barium carbonate 9-13%, zinc oxide 4-6%, calcined talc 8-12%, aluminum oxide 3-8%, and the sum of all components is 100%;

[0038] Carboxymethylcellulose sodium 0.12-0.18%, sodium tripolyphosphate 0.15-0.3%.

[0039] The further optimization of the preparation method of the ceramic tile with silver foil decoration effect is:

[0040] The mass percentage chemical composition of the base glaze is:

[0041] SiO2 48.5-54.8%, Al2O3 12.8-18%, Fe2O3 0-0.45%, CaO 9-13%, MgO 3-7%, Na2O 2.8-6%, K2O 0.3-2.0%, ZnO 1.5-6%, B2O3 0.3-1.6%, BaO 4-8%; the sum of all components is 100%.

[0042] The further optimization of the preparation method of the ceramic tile with silver foil decoration effect is:

[0043] The base glaze comprises the following preparation steps:

[0044] The corresponding raw material components, carboxymethylcellulose sodium and sodium tripolyphosphate are weighed according to the base glaze formula, and an appropriate amount of water is added, and the base glaze is prepared by ball milling, slurry discharge, passing through two 325 mesh screens, and high-strength iron removal for 3 times.

[0045] The further optimization of the preparation method of the ceramic tile with silver foil decoration effect is:

[0046] The specific gravity of the glaze slurry of the base glaze is 1.87-1.97 g / ml, the flow rate is 35-65 seconds, and the glazing amount of the base glaze is 420-720 g / m 2 .

[0047] The further optimization of the preparation method of the ceramic tile with silver foil decoration effect is:

[0048] The matt dry particle glaze comprises the following mass percentage raw material components:

[0049] Potassium feldspar 40-58%, calcined talc 5-10%, calcite 6-16%, barium carbonate 5-10%, wollastonite 5-10%, zinc oxide 3-5%, aluminum oxide 3-8%, and the sum of all components is 100%;

[0050] Carboxymethylcellulose sodium 0.12-0.18%, sodium tripolyphosphate 0.15-0.3%.

[0051] The further optimization of the preparation method of the ceramic tile with silver foil decoration effect is:

[0052] The mass percentage chemical composition of the matte dry granular glaze is:

[0053] SiO2 55~63%, Al2O3 17~21%, CaO 10~12%, MgO 0.9~5%, K2O 3.8~5.9%, Na2O 0.3~1.3%, Fe2O3 0.01~0.06%, TiO2 0~0.05%, BaO 3~6%, ZnO 3~6%, loss on ignition 0~0.1%, and the sum of all components is 100%.

[0054] The further optimization of the preparation method of the ceramic tile with silver foil decoration effect is:

[0055] The matte dry granular glaze comprises the following preparation steps:

[0056] According to the matte dry granular glaze formula, the corresponding raw material components, additional carboxymethyl cellulose sodium and sodium tripolyphosphate are weighed, an appropriate amount of water is added, and the mixture is uniformly mixed, melted at 1620 DEG C, and kept for 6-10 hours, then slowly cooled to room temperature at a cooling rate of 6-20 DEG C / h, so that the crystals are precipitated, and the particles of 4-25 meshes are prepared by crushing and screening, thereby obtaining the matte dry granular glaze.

[0057] The further optimization of the preparation method of the ceramic tile with silver foil decoration effect is:

[0058] The specific gravity of the matte dry granular glaze is controlled to be 1.23-1.35 g / ml, and the glaze application amount is controlled to be 380-500 g / m 2 .

[0059] The further optimization of the preparation method of the ceramic tile with silver foil decoration effect is:

[0060] The specific gravity of the glue is controlled to be 1.15-1.25 g / ml, and the dosage is controlled to be 160-250 g / m 2 .

[0061] The further optimization of the preparation method of the ceramic tile with silver foil decoration effect is:

[0062] The high-temperature firing time is 39-55 minutes, and the firing temperature is 1180 DEG C-1210 DEG C, that is, high-temperature fast firing.

[0063] The further optimization of the preparation method of the ceramic tile with silver foil decoration effect is:

[0064] The semi-polishing is polishing treatment of the tile surface using elastic grinding blocks, and the lightness after polishing is 25-35 degrees.

[0065] The fourth invention purpose of the present application is:

[0066] The application provides a ceramic tile with a silver foil decoration effect, which is prepared according to the preparation method of the ceramic tile with the silver foil decoration effect.

[0067] The ceramic tile with the silver foil decoration effect prepared by the application is prepared by preparing a silver foil dry granular glaze, a matt dry granular glaze and a base glaze, adjusting and optimizing the components and the ratio of the glazes, positioning and applying the silver foil dry granular glaze, and using the dry granular glaze semi-throwing method, so that the contrast between the silver foil dry granular glaze and the matt dry granular glaze is enhanced, the physical color of the silver foil core mica sheet particles is used, the perfect silver foil effect is obtained, and the problems of weak metal gloss, short-lasting gloss and single color are solved.

[0068] The silver foil dry granular glaze, the ceramic tile with the silver foil decoration effect and the preparation method of the application involve the following key technologies:

[0069] (1) Preparation of the silver foil dry granular glaze:

[0070] The formula composition of the silver foil dry granular glaze directly affects the metal flash effect of the product. For the silver foil dry granular glaze, in addition to the requirement of having the silver foil flash effect, the silver foil dry granular glaze also needs to be compatible with the matt dry granular glaze and the base glaze.

[0071] In order to obtain the silver foil dry granular glaze meeting the production requirement, the technical solution is adjusted and optimized from the following aspects.

[0072] (1) High-purity mica sheet particles are introduced as the silver foil core. Impure mica sheet particles are easy to bubble, which affects the quality of the silver foil core. The particle size of the mica sheet particles is 4-120 mesh, and the particle size is selected according to the product requirement. According to the test comparison results of the technical solution, the mica sheet particles not in the selected particle size range have the problems of uneven glaze surface and weak silver foil flash. The mica sheet particles in the selected range not only have a smooth glaze surface, but also have obvious flash effect.

[0073] (2) The formula of the silver foil base paste is adjusted and optimized, and the formula of the matt dry granular glaze and the formula of the base glaze are adjusted and optimized accordingly. The ratio of magnesium oxide (introduced by calcined talc) and aluminum oxide in the formula of the silver foil base paste is optimized, and the melting temperature, the transmittance and the bonding degree are good. The specific details are shown in Table 1.

[0074] (3) A proper amount of copper oxide and cerium oxide is introduced to increase the silver foil flash effect.

[0075] The physical color produced by the mixed structure arrangement is mainly through the crystal precipitation of Cu element and the crystal precipitation of Ce element during high-temperature firing. The silver-white color with a slight greenish tint is macroscopically presented, and the semi-transparency is combined with the color of the mica sheet itself, and the silver foil effect is obvious. Therefore, an appropriate amount of copper oxide and cerium oxide is added in the formula; 2-8% of cerium oxide and 2-5% of copper oxide are added in the base paste formula, and the product effect is optimized.

[0076] 1) Introduce copper oxide:

[0077] The introduction of CuO in the silver foil base paste formula can promote the color of the silver foil core. The copper oxide exists in the glaze in the form of ions or colloidal particles, enhances the absorption of light waves on the brick surface, strengthens the light reflection effect, presents a smooth and delicate texture, and improves the smoothness and gloss of the glaze surface; in addition, the addition of copper oxide increases the density and hardness of the base paste glaze, making the glaze surface more wear-resistant and scratch-resistant; moreover, copper oxide has good high-temperature stability and is not easy to reduce and decompose at high temperature, thereby maintaining the durability of the pattern color on the brick surface.

[0078] 2) Introduce cerium oxide:

[0079] The introduction of CeO2 in the silver foil base paste formula can enhance the following effects:

[0080] A. Improve transparency: The introduction of cerium oxide significantly improves the high-temperature glassification degree of the silver foil base paste glaze, making the silver foil core present a clear and transparent effect.

[0081] B. Improve gloss: Cerium oxide can promote the growth of crystals in the glaze, forming a fine and uniform crystal structure, making the light reflection on the surface more uniform and smooth, thereby improving the gloss of the silver foil dry particles.

[0082] C. Improve stability: Cerium oxide can prevent other components in the base paste glaze from undergoing oxidation-reduction reactions, maintain the chemical stability of the base paste glaze layer, and effectively prevent the silver foil core from changing during production and use.

[0083] D. Enhance the silver foil flashing effect: The physical properties of cerium oxide allow it to produce reflection, refraction, and interference phenomena in the glaze, thereby forming a flashing effect.

[0084] E. Enhance hardness and wear resistance: Cerium oxide can increase the hardness and wear resistance of the silver foil dry particle glaze, thereby improving the surface hardness and wear resistance of the product.

[0085] (4) Introduce an appropriate amount of quartz powder:

[0086] Due to the large amount of magnesium oxide and aluminum oxide added in the silver foil base paste formula, in order to solve the high temperature fusion compatibility problem of silver foil dry grain glaze and matte dry grain glaze, the project introduces a proper amount of quartz powder into the silver foil base paste formula, effectively solves the combination problem of silver foil dry grain glaze and matte dry grain glaze, and the combination problem with the bottom glaze, the three are tightly combined after high temperature firing, so that the durability of silver foil effect.

[0087] (5) Introducing aluminum oxide powder:

[0088] The silver foil dry grain glaze introduces aluminum oxide (Al2O3), which has obvious effect in the glaze, high melting point and stable chemical properties. By introducing aluminum oxide, the melting temperature of the silver foil core can be significantly improved. In addition, the higher melting temperature can avoid the glaze layer on the surface of the silver foil core having enough time to discharge gas before high temperature fusion and sealing. Avoiding defects such as blistering and pinholes, thereby ensuring good performance of the silver foil dry grain glaze; aluminum oxide has a certain high temperature viscosity to ensure the formation and organic combination of dry grain.

[0089] (II) Optimization of raw firing process:

[0090] Unlike the melting and quenching process of ordinary fired frit dry grain, since the silver foil core mica sheet particles are pure dry sheets, and the silver foil base paste is raw glaze, the two are combined by re-coating, and will naturally crack after drying. Therefore, the raw firing process is adopted. After many experiments and summaries, the mixed and uniform raw materials are placed in the furnace, and the silver foil dry grain glaze is prepared by 900-1100℃ medium temperature raw firing, constant temperature for 30 minutes, cooling, crushing, and screening 4-120 mesh dry grain. The silver foil core and the silver foil base paste are integrated, thereby improving the combination.

[0091] (III) Optimization of particle fineness of silver foil dry grain glaze:

[0092] The particle fineness of silver foil dry grain glaze has a great influence on the flashing effect of the glaze surface. The finer the particles, the worse the flashing effect. When the particles of silver foil dry grain glaze are relatively coarse, the glaze surface is also relatively rough after subsequent glazing, and the product quality is low.

[0093] The silver foil dry grain glaze is broken and the particles are screened, and 4-6 mesh, 10-40 mesh, and 60-100 mesh are screened respectively.

[0094] Table 1 Influence of silver foil dry grain glaze fineness on glaze surface effect

[0095]

[0096] Through comparison test, when the particle size of silver foil dry grain glaze is controlled in 10-40 mesh, the glaze surface effect is optimal. Therefore, in the preparation process, 10-40 mesh silver foil dry grain glaze is selected and reserved. BRIEF DESCRIPTION OF DRAWINGS

[0097] Figure 1 Physical effect drawing of the ceramic tile with silver foil decorative effect (1220℃) of the present application.

[0098] Figure 2 Physical effect drawing of the ceramic tile with silver foil decorative effect (1185℃) of the present application.

[0099] Figure 3 Preparation process flow chart of the ceramic tile with silver foil decorative effect of the present application. DETAILED DESCRIPTION

[0100] In order to make the application, technical solutions and advantages of the present application clearer and more apparent, the present application is described in detail in conjunction with specific examples. It should be understood that the examples are only used to illustrate the present application, and not to limit the protection scope of the present application, and any simple improvement of the preparation method of the present application within the concept of the present application is within the protection scope of the present application.

[0101] Example 1

[0102] A preparation method of a ceramic tile with silver foil decorative effect, comprising the following preparation steps:

[0103] S1. Preparing a body, and applying a base glaze to the body to obtain a tile body A;

[0104] S2. Printing a design inkjet pattern on the tile body A to obtain a tile body B;

[0105] S3. Using a cloth machine to apply the silver foil dry particle glaze mentioned above to the tile body B to obtain a tile body C;

[0106] S4. Using a jet printing machine to apply glue to the tile body C to obtain a tile body D;

[0107] S5. Using a glaze spraying machine to apply matte dry particle glaze to the tile body D to obtain a tile body E;

[0108] S6. High-temperature firing the tile body E to obtain a tile body F;

[0109] S7. Semi-polishing and sorting the tile body F to obtain the ceramic tile with silver foil decorative effect.

[0110] The silver foil dry particle glaze comprises a silver foil core and a silver foil base paste, and the mass ratio of the silver foil core to the silver foil base paste is 3:97;

[0111] The silver foil core is mica flake particles, and the particle size is 10-40 mesh, and the shape is flaky or particulate;

[0112] The silver foil base paste comprises the following components by mass percentage:

[0113] Quartz powder 38%, alumina 16%, calcined talc 28%, potassium oxide 12%, cerium oxide 4%, copper oxide 2%, total 100%;

[0114] Sodium carboxymethyl cellulose 0.15%, sodium tripolyphosphate 0.12%, glaze colorant 1%.

[0115] An appropriate amount of water is added for mixing, and the amount of water is according to the mass ratio of total dry materials (excluding additional raw materials): water = 1:0.26;

[0116] The silver foil dry particle glaze is 55g / m 2 Application.

[0117] The further optimization of the preparation method of the ceramic tile with silver foil decorative effect of the present application is:

[0118] The base glaze comprises the following raw material components in mass percentage:

[0119] Potassium feldspar powder 38%, air knife kaolin 15%, calcite 11%, wollastonite powder 4%, quartz powder 4%, barium carbonate 9%, zinc oxide 4%, calcined talc 9%, alumina 6%;

[0120] Additional: sodium carboxymethyl cellulose 0.15%, sodium tripolyphosphate 0.2%;

[0121] An appropriate amount of water is added for mixing, and the amount of water is according to the mass ratio of total dry materials (excluding additional raw materials): water = 1:0.28;

[0122] The base glaze comprises the following preparation steps:

[0123] The corresponding raw material components are weighed according to the base glaze formula, ball milled, slurry is placed, passed through two 325 mesh sieves, and high-strength iron removal is performed three times to prepare the base glaze.

[0124] The specific gravity of the glaze slurry of the base glaze is 1.89g / ml, the flow rate is 55 seconds, and the glazing amount of the base glaze is 520g / m2.

[0125] The matte dry particle glaze comprises the following raw material components in mass percentage:

[0126] Potassium feldspar 53%, calcined talc 9%, calcite 15%, barium carbonate 6%, wollastonite 8%, zinc oxide 4%, alumina 5%;

[0127] Additional sodium carboxymethyl cellulose 0.15%, sodium tripolyphosphate 0.15%;

[0128] An appropriate amount of water is added for mixing, and the amount of water is according to the mass ratio of total dry materials (excluding additional raw materials): water = 1:0.28;

[0129] The matte dry granular glaze comprises the following preparation steps:

[0130] The corresponding raw material components are weighed according to the matte dry granular glaze formula, mixed uniformly, melted at 1620 DEG C, and kept for 8 hours, then slowly cooled to room temperature at a cooling rate of 10 DEG C / h, so that crystals are precipitated, the dry granules are broken and sieved to 20 meshes, and the matte dry granular glaze is prepared.

[0131] The matte dry granular glaze has a specific gravity of 1.30 g / ml, and an application amount of 420 g / m 2 .

[0132] The further optimization of the preparation method of the ceramic tile with silver foil decoration effect is as follows:

[0133] The glue has a specific gravity of 1.20 g / ml, and an application amount of 180 g / m 2 .

[0134] The further optimization of the preparation method of the ceramic tile with silver foil decoration effect is as follows:

[0135] The high-temperature firing time is 42 minutes, and the firing temperature is 1195 DEG C, namely high-temperature fast firing.

[0136] The further optimization of the preparation method of the ceramic tile with silver foil decoration effect is as follows:

[0137] The semi-polishing is polishing treatment of the tile surface by using elastic grinding blocks, and the lightness after polishing is 30 degrees.

[0138] The ceramic tile with silver foil decoration effect prepared according to the above embodiment not only has a smooth glaze surface, but also has obvious shining effect, and specific details are shown in the following Figure 1 .

[0139] Product performance test:

[0140] The product indexes are shown in Table 2.

[0141] Table 2 Product quality routine test results (rule 600*900*9.8mm)

[0142]

[0143]

[0144] Table 3 Product quality special test results

[0145]

[0146] Table 4 Product quality special 2 test results

[0147]

[0148] The product passed routine and specialized testing. The silver foil dry granule glaze of this invention introduces mica flakes and uses silver foil base slurry to appropriately re-form the mica flakes. The resulting silver foil dry granule glaze significantly increases the firing temperature of the mica flakes. Even at high temperatures of 1185℃ to 1220℃, the mica flakes retain their original shape. By optimizing the process formula, the silver foil dry granule glaze not only achieves the silver foil shimmering effect but also solves the problem of high-temperature compatibility between the silver foil dry granule glaze and matte dry granule glazes and base glazes. The product has shown excellent performance in all tests.

[0149] In summary, the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any changes, modifications, and evolutions made by those skilled in the art without departing from the scope of the present invention based on the disclosed technical content shall be considered equivalent embodiments of the present invention. Furthermore, any changes, modifications, and evolutions made to the above embodiments based on the essential technology of the present invention shall still fall within the protection scope of the present invention.

[0150] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0151] Experimental methods not specified in this invention are generally performed under conventional conditions or as recommended by the manufacturer.

[0152] Unless otherwise stated, the various optimized technical solutions in this invention can be combined with each other.

[0153] Unless otherwise stated, percentages and parts are percentages and parts by mass.

[0154] Experimental methods not specified in the instructions and examples are generally performed under standard conditions or as recommended by the manufacturer.

[0155] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as are familiar to those skilled in the art. Furthermore, any methods and materials similar to or equivalent to those described herein may be used in the methods of this invention.

Claims

1. A dry-grain glaze for silver foil, characterized in that: It includes a silver foil core and a silver foil base paste, with a mass ratio of 1-5:95-99 between the silver foil core and the silver foil base paste; The silver foil core is mica flake particles with a particle size of 4 to 120 mesh and a shape of flakes or granules; The silver foil base paste comprises the following components by weight percentage: Quartz powder 38-48%, alumina 13-22%, calcined talc 26-30%, potassium oxide 10%-15%, cerium oxide 2-8%, copper oxide 2-5%, the sum of the above components is 100%; Add 0.15%–0.3% sodium tripolyphosphate, 0.12%–0.18% sodium carboxymethyl cellulose, and 0%–2% glaze colorant.

2. A method for preparing the dry granular enamel of silver foil according to claim 1, characterized in that: It includes the following preparation steps: S1. Preparation of silver foil base paste: Weigh the corresponding raw materials, sodium tripolyphosphate, sodium carboxymethyl cellulose, and glaze colorant according to the proportion, add an appropriate amount of water, and ball mill them into a slurry with a fineness of 0.1-0.3% on a 325-mesh sieve, a moisture content of 23-27%, a specific gravity of 1.85-1.95 g / ml, and a flow rate of 50-100 seconds to prepare the silver foil base slurry for later use. S2. Preparation of dry granular silver foil enamel: Using a 20-25 mesh sieve, spread a 0.1-0.5 mm layer of silver foil core on it using a dry granulator, spray an appropriate amount of water to moisten or apply glue, and then cover the surface with diluted silver foil base slurry and stir evenly. The silver foil dry granule glaze is prepared by repeating the process 1-2 times or more as needed, followed by drying, stirring evenly, sieving, firing at a medium temperature of 900-1100℃ for 30 minutes, cooling, crushing, and screening into 10-40 mesh particles. The diluted silver foil base paste is prepared by adding an appropriate amount of water to the silver foil base paste, with a specific gravity of 1.30-1.85 g / ml and an application rate of 150-400 g / m³. 2 The preparation was achieved by controlling the flow rate at 30–38 seconds. The adhesive mentioned in step S2 comprises the following components in parts by weight: 100 parts water, 5 parts sodium carboxymethyl cellulose, 13 parts ethylene glycol, 0.1 parts sodium tripolyphosphate, and 0.12 parts preservative.

3. A method for preparing ceramic tiles with a silver foil decorative effect, characterized in that: It includes the following preparation steps: S1. Prepare a blank and apply a base glaze to the blank to obtain brick body A; S2. Print the designed inkjet pattern onto the brick A to obtain brick B; S3. Apply the silver foil dry granule glaze of claim 1 to the brick body B using a cloth-laying machine to obtain the brick body C; S4. Apply adhesive to the brick C using a printer to obtain brick D; S5. Apply a glazing machine to the brick body D to apply a matte dry granule glaze, resulting in brick body E; S6. The brick body E is fired at high temperature to obtain brick body F; S7. The brick body F is semi-polished and sorted to obtain the ceramic brick with silver foil decorative effect.

4. The method for preparing ceramic tiles with silver foil decorative effect according to claim 3, characterized in that: The base glaze comprises the following raw material components by weight percentage: Potassium feldspar powder 33-45%, air-cut kaolin 10-15%, calcite 8-12%, wollastonite powder 3-6%, quartz powder 4-8%, barium carbonate 9-13%, zinc oxide 4-6%, calcined talc 8-12%, alumina 3-8%, the sum of all components is 100%; Add 0.12–0.18% sodium carboxymethyl cellulose and 0.15–0.3% sodium tripolyphosphate.

5. The method for preparing ceramic tiles with silver foil decorative effect according to claim 4, characterized in that: The chemical composition of the base glaze by mass percentage is as follows: The composition of all components is as follows: SiO2 48.5–54.8%, Al2O3 12.8–18%, Fe2O3 0–0.45%, CaO 9–13%, MgO 3–7%, Na2O 2.8–6%, K2O 0.3–2.0%, ZnO 1.5–6%, B2O3 0.3–1.6%, BaO 4–8%. The sum of all components is 100%.

6. The method for preparing ceramic tiles with silver foil decorative effect according to claim 4, characterized in that: The base glaze includes the following preparation steps: Weigh the corresponding raw material components, as well as the added sodium carboxymethyl cellulose and sodium tripolyphosphate, according to the base glaze formula. Add an appropriate amount of water, and after ball milling, slurry discharge, and passing through two 325-mesh sieves, the base glaze is prepared by high-strength iron removal three times.

7. The method for preparing ceramic tiles with silver foil decorative effect according to claim 3, characterized in that: The following are the raw material components by weight percentage for the matte dry granule glaze: Potassium feldspar 40-58%, calcined talc 5-10%, calcite 6-16%, barium carbonate 5-10%, wollastonite 5-10%, zinc oxide 3-5%, aluminum oxide 3-8%, and the sum of all components is 100%; Add 0.12–0.18% sodium carboxymethyl cellulose and 0.15–0.18% sodium tripolyphosphate.

8. The method for preparing ceramic tiles with silver foil decorative effect according to claim 7, characterized in that: The mass percentage chemical composition of the matte dry granule glaze is as follows: SiO2 55-63%, Al2O3 17-21%, CaO 10-12%, MgO 0.9-5%, K2O 3.8-5.9%, Na2O 0.3-1.3%, Fe2O3 0.01-0.06%, TiO2 0-0.05%, BaO 3-6%, ZnO 3-6%, loss on ignition 0-0.1%; the sum of all components is 100%.

9. The method for preparing ceramic tiles with silver foil decorative effect according to claim 7, characterized in that: The matte dry granule glaze comprises the following preparation steps: Weigh the corresponding raw material components, as well as the added sodium carboxymethyl cellulose and sodium tripolyphosphate, according to the matte dry granule glaze formula. Add an appropriate amount of water, mix evenly, melt at 1620℃, and keep warm for 6-10 hours. Then, slowly cool down to room temperature at a cooling rate of 6-20℃ / h to precipitate crystals. After crushing and screening into 4-25 mesh particles, the matte dry granule glaze is obtained.

10. A ceramic tile with a silver foil decorative effect, characterized in that: It is prepared by the method for preparing ceramic tiles with silver foil decorative effect according to claim 3.

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