Dry granular glaze with starlight effect as well as preparation method and application of dry granular glaze

Abstract

The invention belongs to the technical field of ceramic wall and floor tiles, and particularly relates to dry granular glaze with a starlight effect as well as a preparation method and application of the dry granular glaze. The dry granular glaze comprises dry granules I and dry granules II, the dry granules I are prepared from the following chemical components in percentage by mass: 55 to 58 percent of SiO2, 8 to 12 percent of Al2O3, 2 to 4 percent of CaO, 1 to 2 percent of MgO, 1 to 3 percent of K2O, 1 to 2 percent of Na2O, 15 to 25 percent of ZrO2, 3 to 5 percent of B2O3, 0.5 to 1.5 percent of CeO2, 0.2 to 0.8 percent of LiCO3, 0.1 to 0.5 percent of Y2O3 and 2 to 4 percent of BaCO3. The rock plate prepared from the dry granular glaze provided by the invention has the advantages of uniform distribution of dry granules, good starlight effect, excellent low-concentration acid and alkali resistance, excellent high-concentration acid and alkali resistance, excellent household chemical reagent and swimming pool salt resistance and excellent pollution resistance.

Description

Technical Field

[0001] This invention belongs to the field of ceramic wall and floor tile technology, specifically relating to a dry granule glaze with a starlight effect, its preparation method, and its application. Background Technology

[0002] With changing aesthetic values, more and more consumers are paying attention to the aesthetic effects of wall materials. Traditional wall and floor tiles mainly include glazed tiles, unglazed tiles, and antique tiles. Wall and floor tiles with a starlight effect are a type of glazed tile. Due to their starlight effect, they have received widespread attention. They are usually made by applying dry granule glaze with a starlight effect to the body to create a glaze layer with sparkling crystals.

[0003] In existing dry-granule glaze technologies, the performance after application is often considered in addition to the starlight effect, as well as stain resistance and wear resistance. For example, Chinese Patent Publication No. CN120157343A discloses a dry-granule glaze with a starlight effect and frosted texture, ceramic tiles, and their preparation method. The dry-granule glaze with the starlight effect and frosted texture, by weight, comprises the following components: 57-62 parts of high-temperature dry granules, 36-40 parts of low-temperature dry granules, and 1-4 parts of zircon sand; the total amount of the high-temperature dry granules, low-temperature dry granules, and zircon sand is 100 parts. This technical solution, through a specific ratio of high-temperature dry granules, low-temperature dry granules, and zircon sand, can form a three-dimensional fluorescent effect and frosted texture after firing, while also exhibiting excellent stain resistance.

[0004] Chinese Patent CN115259666B discloses a dry-granule glaze, a ceramic tile with a starlight effect, and its preparation method. The dry-granule glaze is composed of zirconium-containing frit dry granules I and II. Both zirconium-containing frit dry granules I and II in this technical solution contain abundant zirconium compounds. During high-temperature firing and cooling, the zirconium in the dry-granule glaze can precipitate in crystalline form, resulting in a glaze surface with many fine, glittering particles, exhibiting a starlight diamond effect. The glaze also boasts a delicate, natural, and realistic color, along with excellent wear resistance.

[0005] However, there are few reports on the chemical corrosion resistance of dry granule glazes with starlight effect after application in existing technologies. Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. The present invention provides a dry granular glaze with star effect, its preparation method and application. The rock slab prepared by the dry granular glaze provided by the present invention has uniformly distributed dry granules, good star effect and excellent resistance to low concentration acid and alkali, high concentration acid and alkali, household chemical reagents and swimming pool salts and stain resistance.

[0007] This invention is achieved through the following technical solution:

[0008] In a first aspect, the present invention provides a dry granule glaze with a starlight effect, comprising dry granules I and dry granules II;

[0009] The chemical composition of the dry granules I, by mass percentage, includes SiO2: 55-58%, Al2O3: 8-12%, CaO: 2-4%, MgO: 1-2%, K2O: 1-3%, Na2O: 1-2%, ZrO2: 15-25%, B2O3: 3-5%, CeO2: 0.5-1.5%, LiCO3: 0.2-0.8%, Y2O3: 0.1-0.5%, BaCO3: 2-4%;

[0010] The chemical composition of the dry granules II, by mass percentage, includes SiO2: 45-55%, Al2O3: 15-28%, CaO: 6-8%, MgO: 1.5-2%, K2O: 2.5-3.5%, Na2O: 3-4%, ZrO2: 1-2%, B2O3: 1-2.5%, CeO2: 0.2-0.5%, LiCO3: 0.8-1.5%, Y2O3: 0.1-0.2%, BaCO3: 2-3%.

[0011] Preferably, the chemical composition of the dry granules I, by mass percentage, includes SiO2: 55.8%, Al2O3: 11.2%, CaO: 2.6%, MgO: 1.2%, K2O: 1.6%, Na2O: 1.3%, ZrO2: 18.8%, B2O3: 3.3%, CeO2: 0.8%, LiCO3: 0.5%, Y2O3: 0.3%, BaCO3: 2.6%;

[0012] Preferably, the chemical composition of the dry granules II, by mass percentage, includes SiO2: 48.9%, Al2O3: 26.8%, CaO: 7.6%, MgO: 1.8%, K2O: 3.2%, Na2O: 3.6%, ZrO2: 1.7%, B2O3: 2.3%, CeO2: 0.3%, LiCO3: 1.2%, Y2O3: 0.1%, and BaCO3: 2.5%.

[0013] After high-temperature firing, the dry granules in the glaze can form sparkling crystals. Their chemical composition not only affects the starlight effect of the slab, but also affects the acid and alkali resistance, resistance to household chemical reagents and swimming pool salts, and stain resistance due to the interaction of the granules during high-temperature firing. After optimizing the chemical composition of dry granules I and II, the applicant finally obtained a slab prepared with dry granule glaze. After performance testing, the slab's resistance to low-concentration acids and alkalis was GLA level; its resistance to high-concentration acids and alkalis was GHA level; its resistance to household chemical reagents and swimming pool salts was GA level; and its stain resistance reached level 5.

[0014] In some preferred embodiments, the particle size of dry granules I and dry granules II is 80-150 mesh.

[0015] In some preferred embodiments, the dry granule glaze with starlight effect also includes a suspending agent.

[0016] In some preferred embodiments, the mass ratio of dry granules I, dry granules II and suspending agent is 25-35: 5-15: 55-65.

[0017] Preferably, the mass ratio of dry granules I, dry granules II, and suspending agent is 30:10:60.

[0018] In some preferred embodiments, the suspending agent comprises polyvinylpyrrolidone, carboxyl-terminated polysiloxane, sodium carboxymethyl cellulose, and water.

[0019] In some preferred embodiments, the mass ratio of polyvinylpyrrolidone, carboxyl-terminated polysiloxane, and sodium carboxymethyl cellulose is 6-8:1:1-3:35-45.

[0020] Preferably, the mass ratio of polyvinylpyrrolidone, carboxyl-terminated polysiloxane, and sodium carboxymethyl cellulose is 7:1:2:40.

[0021] The suspending agent allows dry granules I and II to be evenly distributed, preventing agglomeration. During the experiment, the applicant unexpectedly discovered that the suspension and dispersion effect of the compounded polyvinylpyrrolidone, carboxyl-terminated polysiloxane and sodium carboxymethyl cellulose is excellent. It effectively avoids the agglomeration of dry granules while improving resistance to high concentrations of acids and alkalis, household chemical reagents and swimming pool salts, as well as stain resistance.

[0022] Preferably, the polyvinylpyrrolidone is selected from at least one of PVPK30 and PVPK60.

[0023] Preferably, the carboxyl-terminated polysiloxane is a carboxyl-terminated polydimethylsiloxane.

[0024] Preferably, the sodium carboxymethyl cellulose has a degree of substitution ≥0.9% and a viscosity of 1000-2000 mPa·s at 25°C.

[0025] Secondly, the present invention provides a method for preparing the above-mentioned dry granule glaze with starlight effect, comprising the following steps: mixing the raw materials of dry granule I, melting, quenching, pulverizing and sieving to obtain dry granule I;

[0026] The raw materials for Dry Granules II are mixed, melted, quenched, pulverized, and sieved to obtain Dry Granules II;

[0027] Dry granules I, dry granules II, and suspending agent are mixed evenly to obtain dry granule glaze.

[0028] Thirdly, the present invention provides the application of the aforementioned dry granular glaze with a starlight effect in the preparation of sintered stone slabs. Fourthly, the present invention provides a sintered stone slab comprising a blank, the surface of which is provided with a starlight glaze layer, the starlight glaze layer containing the aforementioned dry granular glaze.

[0029] In some preferred embodiments, the chemical composition of the blank, by mass percentage, includes SiO2: 65-70%, Al2O3: 12-18%, Fe2O3: 0.3-0.7%, TiO2: 0.15-0.35%, MgO: 1-1.3%, CaO: 3-5%, K2O: 1.8-2.2%, Na2O: 1.8-2.3%, and loss on ignition 4-6%.

[0030] Preferably, the blank further includes additional auxiliary materials.

[0031] Preferably, the amount of the added auxiliary materials is 1-1.5% of the total weight of the raw material.

[0032] Preferably, the added excipients include water glass, sodium carboxymethyl cellulose, and sodium tripolyphosphate in a mass ratio of 14-18:3-5:1.

[0033] In some preferred embodiments, the method for preparing the rock slab includes the following steps:

[0034] The raw material for the green body is ball-milled, sieved, iron removed, slurry homogenized, spray-granulated, and pressed into shape to obtain the green body;

[0035] Apply dry granule glaze to the surface of the blank; fire and polish to obtain the slab.

[0036] In some preferred embodiments, the amount of the dry granular glaze applied is 500-800 g / m³. 2 .

[0037] In some preferred embodiments, the firing temperature is 1150-1200℃ and the firing time is 40-60min.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The dry-granule glaze with a starlight effect provided by this invention can be used in the preparation of wall and floor tiles. During preparation, it can be directly applied to the tile body. Firstly, this invention optimizes the chemical composition of dry granules I and II; secondly, it optimizes the suspending agent. After high-temperature firing, it forms sparkling crystals, which not only ensures the uniform distribution of dry granules in the slab, giving it a dazzling starlight effect, but also gives the slab excellent resistance to low-concentration acids and alkalis, high-concentration acids and alkalis, household chemicals and swimming pool salts, and stain resistance. Performance testing verifies that its resistance to low-concentration acids and alkalis is GLA grade; its resistance to high-concentration acids and alkalis is GHA grade; its resistance to household chemicals and swimming pool salts is GA grade; and its stain resistance reaches level 5. Furthermore, the slab prepared using the dry-granule glaze of this invention also has excellent mechanical properties, including wear resistance, impact resistance, thermal shock resistance, frost resistance, and glaze crack resistance. Attached Figure Description

[0040] Figure 1 This is a physical image of the rock slab used in Application Example 2 of the present invention;

[0041] Figure 2 This is a physical image of the rock slab used in Application Example 3 of the present invention;

[0042] Figure 3 This is a physical image of the rock slab used in Application Example 6 of the present invention;

[0043] Figure 4 This is a physical image of the rock slab used in Application Example 7 of the present invention;

[0044] Figure 5 This is a physical image of the rock slab used in Application Example 10 of the present invention. Detailed Implementation

[0045] To enable those skilled in the art to more clearly understand the technical solutions described in this invention, the following embodiments are provided for illustration. It should be noted that the following embodiments do not constitute a limitation on the scope of protection claimed by this invention.

[0046] Unless otherwise specified, the raw materials, reagents or apparatus used in the following examples and comparative examples are available from conventional commercial sources or can be obtained by existing known methods. Example 1

[0047] A dry granule glaze with a starlight effect is composed of dry granules I, dry granules II and a suspending agent in a mass ratio of 25:15:60.

[0048] The chemical composition of dry granules I, by mass percentage, includes SiO2: 55.8%, Al2O3: 11.2%, CaO: 2.6%, MgO: 1.2%, K2O: 1.6%, Na2O: 1.3%, ZrO2: 18.8%, B2O3: 3.3%, CeO2: 0.8%, LiCO3: 0.5%, Y2O3: 0.3%, and BaCO3: 2.6%.

[0049] The chemical composition of dry granules II, by mass percentage, includes SiO2: 48.9%, Al2O3: 26.8%, CaO: 7.6%, MgO: 1.8%, K2O: 3.2%, Na2O: 3.6%, ZrO2: 1.7%, B2O3: 2.3%, CeO2: 0.3%, LiCO3: 1.2%, Y2O3: 0.1%, BaCO3: 2.5%.

[0050] The particle size of dry granules I and dry granules II is 100 mesh.

[0051] The suspending agent is polyvinylpyrrolidone, carboxyl-terminated polysiloxane, sodium carboxymethyl cellulose, and water in a mass ratio of 7:1:2:40.

[0052] Polyvinylpyrrolidone (PVPK30) is sourced from Shuangchuang International Co., Ltd.

[0053] The carboxyl-terminated polysiloxane is a carboxyl-terminated polydimethylsiloxane, sourced from Guangzhou Xumei Chemical Technology Co., Ltd., model number: FINISH CM 23.

[0054] Sodium carboxymethyl cellulose has a degree of substitution ≥0.9% and a viscosity of 1000-2000 mPa·s at 25℃. It is sourced from Weifang Lude Chemical Co., Ltd., and its model number is C-10.

[0055] The above-mentioned method for preparing dry granule glaze with starlight effect includes the following steps: mixing the raw materials of dry granule I, melting, quenching, pulverizing and sieving to obtain dry granule I;

[0056] The raw materials for Dry Granules II are mixed, melted, quenched, pulverized, and sieved to obtain Dry Granules II;

[0057] Dry granules I, dry granules II, and suspending agent are mixed evenly to obtain dry granule glaze. Example 2

[0058] The only difference from Example 1 is that the mass ratio of dry granules I, dry granules II, and suspending agent is 30:10:60; all other aspects are the same. Example 3

[0059] The only difference from Example 1 is that the mass ratio of dry granules I, dry granules II, and suspending agent is 35:5:60; all other aspects are the same. Example 4

[0060] The only difference from Example 1 is that the chemical composition of dry granules I, by mass percentage, includes SiO2: 57.3%, Al2O3: 9.6%, CaO: 3.5%, MgO: 1.4%, K2O: 2.2%, Na2O: 1.1%, ZrO2: 15.8%, B2O3: 4.2%, CeO2: 1.2%, LiCO3: 0.3%, Y2O3: 0.2%, BaCO3: 3.2%; all other components are the same. Example 5

[0061] The only difference from Example 1 is that the chemical composition of dry granules II, by mass percentage, includes SiO2: 54.5%, Al2O3: 23.8%, CaO: 6.9%, MgO: 1.5%, K2O: 2.8%, Na2O: 3.3%, ZrO2: 1.2%, B2O3: 1.6%, CeO2: 0.4%, LiCO3: 1.0%, Y2O3: 0.2%, BaCO3: 2.8%; all other components are the same.

[0062] Comparative Example 1

[0063] The only difference from Example 2 is that the chemical composition of dry granules II is the same as that of dry granules I, that is, the chemical composition of dry granules I and dry granules II is as follows: by mass percentage, SiO2: 55.8%, Al2O3: 11.2%, CaO: 2.6%, MgO: 1.2%, K2O: 1.6%, Na2O: 1.3%, ZrO2: 18.8%, B2O3: 3.3%, CeO2: 0.8%, LiCO3: 0.5%, Y2O3: 0.3%, BaCO3: 2.6%; all other components are the same.

[0064] Comparative Example 2

[0065] The only difference from Example 2 is that the chemical composition of dry granules I is the same as that of dry granules II, that is, the chemical composition of dry granules I and dry granules II is as follows: by mass percentage, SiO2: 48.9%, Al2O3: 26.8%, CaO: 7.6%, MgO: 1.8%, K2O: 3.2%, Na2O: 3.6%, ZrO2: 1.7%, B2O3: 2.3%, CeO2: 0.3%, LiCO3: 1.2%, Y2O3: 0.1%, BaCO3: 2.5%; all other components are the same.

[0066] Comparative Example 3

[0067] The only difference from Example 2 is that the chemical composition of dry granules I, by mass percentage, includes SiO2: 55.8%, Al2O3: 11.2%, CaO: 2.6%, MgO: 1.2%, K2O: 1.6%, Na2O: 1.3%, ZrO2: 18.8%, BaO: 4.4%, LiCO3: 0.5%, BaCO3: 2.6%;

[0068] The chemical composition of dry granules II, by mass percentage, includes SiO2: 48.9%, Al2O3: 26.8%, CaO: 7.6%, MgO: 1.8%, K2O: 3.2%, Na2O: 3.6%, ZrO2: 1.7%, BaO: 2.7%, LiCO3: 1.2%, BaCO3: 2.5%; the rest are the same.

[0069] Comparative Example 4

[0070] The only difference from Example 2 is that the chemical composition of the dry granules I, by mass percentage, includes SiO2: 55.8%, Al2O3: 11.2%, CaO: 2.6%, MgO: 1.2%, K2O: 1.6%, Na2O: 1.3%, ZrO2: 18.8%, B2O3: 3.3%, CeO2: 0.8%, SrO: 3.1%, and Y2O3: 0.3%.

[0071] The chemical composition of dry granules II, by mass percentage, includes SiO2: 48.9%, Al2O3: 26.8%, CaO: 7.6%, MgO: 1.8%, K2O: 3.2%, Na2O: 3.6%, ZrO2: 1.7%, B2O3: 2.3%, CeO2: 0.3%, SrO: 3.7%, and Y2O3: 0.1%.

[0072] Comparative Example 5

[0073] The only difference from Example 2 is that the suspending agent is polyvinylpyrrolidone, ethylene glycol, sodium carboxymethyl cellulose and water in a mass ratio of 7:1:2:40; all other aspects are the same.

[0074] Comparative Example 6

[0075] The only difference from Example 2 is that the suspending agent is polyvinylpyrrolidone, polydimethylsiloxane, sodium carboxymethyl cellulose, and water in a mass ratio of 7:1:2:40; all other aspects are the same.

[0076] Application Example 1

[0077] A slab includes a blank body with a star glaze layer on its surface, the star glaze layer containing the dry granule glaze of Example 1.

[0078] The chemical composition of the billet, by mass percentage, includes SiO2: 67.93%, Al2O3: 15.75%, Fe2O3: 0.5%, TiO2: 0.26%, MgO: 1.18%, CaO: 4.63%, K2O: 2.03%, Na2O: 2.17%, with a loss on ignition of 5.36%, and the balance being impurities.

[0079] The billet also includes additional auxiliary materials.

[0080] The amount of added auxiliary materials is 1.27% of the total weight of the raw material.

[0081] The added excipients include water glass, sodium carboxymethyl cellulose, and sodium tripolyphosphate in a mass ratio of 16:3.4:1.

[0082] The method for preparing slab rock includes the following steps:

[0083] The raw material for the green body is ball-milled, sieved, iron removed, slurry homogenized, spray-granulated, and pressed into shape to obtain the green body;

[0084] Apply dry granule glaze to the surface of the blank; fire and polish to obtain the slab.

[0085] The application rate of dry granular glaze is 600g / m². 2 .

[0086] The firing temperature is 1180℃ and the firing time is 60 minutes.

[0087] Application Example 2

[0088] The only difference from Application Example 1 is that the dry granule glaze of Example 1 is replaced with the same mass of dry granule glaze of Example 2; all else is the same.

[0089] Application Example 3

[0090] The only difference from Application Example 1 is that the dry granule glaze of Example 1 is replaced with the same mass of the dry granule glaze of Example 3; all else is the same.

[0091] Application Example 4

[0092] The only difference from Application Example 1 is that the dry granule glaze of Example 1 is replaced with the same mass of the dry granule glaze of Example 4; all else is the same.

[0093] Application Example 5

[0094] The only difference from Application Example 1 is that the dry granule glaze of Example 1 is replaced with the same mass of the dry granule glaze of Example 5; all else is the same.

[0095] Application Example 6

[0096] The only difference from Application Example 1 is that the dry granule glaze of Example 1 is replaced with the same mass of the dry granule glaze of Comparative Example 1; all else is the same.

[0097] Application Example 7

[0098] The only difference from Application Example 1 is that the dry granule glaze of Example 1 is replaced with the same mass of the dry granule glaze of Comparative Example 2; all else is the same.

[0099] Application Example 8

[0100] The only difference from Application Example 1 is that the dry granule glaze of Example 1 is replaced with the same mass of the dry granule glaze of Comparative Example 3; all else is the same.

[0101] Application Example 9

[0102] The only difference from Application Example 1 is that the dry granule glaze of Example 1 is replaced with the same mass of the dry granule glaze of Comparative Example 4; all else is the same.

[0103] Application Example 10

[0104] The only difference from Application Example 1 is that the dry granule glaze of Example 1 is replaced with the same mass of the dry granule glaze of Comparative Example 5; all else is the same.

[0105] Application Example 11

[0106] The only difference from Application Example 1 is that the dry granule glaze of Example 1 is replaced with the same mass of the dry granule glaze of Comparative Example 6; all else is the same.

[0107] Performance Test 1:

[0108] 1. The starlight effect on the glaze is observed with the naked eye;

[0109] 2. Resistance to chemical corrosion:

[0110] 2.1 Resistant to low concentrations of acids and alkalis: GB / T 3810.13-2016;

[0111] 2.2 Resistant to high concentrations of acids and alkalis: GB / T 3810.13-2016;

[0112] 2.3 Resistant to household chemicals and swimming pool salts: GB / T 3810.13-2016;

[0113] 3. Stain resistance: GB / T 3810.14-2016; results are shown in Table 1 below.

[0114] Table 1 Performance Test Statistics

[0115] Glazed star effect Resistant to low concentrations of acids and alkalis Resistant to high concentrations of acids and alkalis Resistant to household chemicals and swimming pool salts Stain resistance Application Example 1 The dry granules are evenly distributed, resulting in a good starlight effect. All are GLA grade All are GHA level All are GA grade Level 5 Application Example 2 The dry granules are evenly distributed, resulting in a good starlight effect. All are GLA grade All are GHA level All are GA grade Level 5 Application Example 3 The dry granules are locally aggregated and distributed, resulting in a good starlight effect. All are GLA grade All are GHB grade All are GA grade Level 5 Application Example 4 The dry granules are evenly distributed, resulting in a good starlight effect. All are GLA grade All are GHB grade All are GA grade Level 4 Application Example 5 The dry granules are evenly distributed, resulting in a good starlight effect. All are GLA grade High-concentration acid resistance is GHB grade; high-concentration alkali resistance is GHA grade. All are GA grade Level 4 Application Example 6 Dry granules aggregate, resulting in poor starlight effect. All are GLB level All are GHB grade All are GB level Level 3 Application Example 7 The dry granules are evenly distributed, resulting in poor starlight effect. Resistance to low concentrations of acid is classified as GLB grade; resistance to low concentrations of alkali is classified as GLA grade. All are GHB grade All are GB level Level 2 Application Example 8 The dry granules are evenly distributed, resulting in a good starlight effect. Resistance to low concentrations of acid is classified as GLC grade; resistance to low concentrations of alkali is classified as GLB grade. All are GHC grade All are GB level Level 3 Application Example 9 The dry granules are evenly distributed, resulting in a good starlight effect. All are GLB level High-concentration acid resistance is GHC grade; high-concentration alkali resistance is GHB grade. All are GB level Level 4 Application Example 10 Dry granules aggregate, with a moderate star effect. All are GLA grade All are GLB level All are GB level Level 2 Application Example 11 Dry granules aggregate, with a moderate star effect. All are GLA grade All are GLB level All are GB level Level 3

[0116] As can be seen from Table 1, the slabs prepared using the dry granule glazes of Examples 1-2 have uniformly distributed dry granules, good star effect, and excellent resistance to low-concentration acids and alkalis, high-concentration acids and alkalis, household chemical reagents and swimming pool salts, as well as stain resistance; the slabs prepared using the dry granule glaze of Example 3 have slightly worse overall performance.

[0117] The dry granule glazes in Examples 4 and 5 exhibited reduced resistance to high concentrations of acids and alkalis, as well as decreased resistance to contamination, due to changes in the chemical composition of dry granules I and II.

[0118] The dry granule glaze of Comparative Example 1, because it only contains dry granules I, resulted in a rock slab with not only dry granule aggregation and moderate star effect, but also decreased resistance to low-concentration acids and alkalis, high-concentration acids and alkalis, household chemical reagents and swimming pool salts, and pollution resistance.

[0119] The dry granule glaze of Comparative Example 2, due to the presence of only dry granule II, resulted in a poor star effect on the resulting rock slab, and its resistance to low-concentration acids and alkalis, high-concentration acids and alkalis, household chemical reagents and swimming pool salts, as well as its resistance to pollution decreased.

[0120] Due to the change in the chemical composition of dry granules I and II, the dry granule glazes of Comparative Examples 3 and 4 showed a significant decrease in the resistance of the resulting slabs to low-concentration acids and alkalis, high-concentration acids and alkalis, household chemical reagents and swimming pool salts, and pollution resistance.

[0121] Due to changes in the composition of the suspending agent, the dry granule glazes of Comparative Examples 5 and 6 resulted in aggregated dry granules, a poorer star effect, and reduced resistance to low-concentration and high-concentration acids and alkalis, household chemical reagents, swimming pool salts, and pollution.

[0122] Performance Test 2

[0123] The rock slab from Application Example 2 was sent to an external testing facility. The testing items and results are shown in Tables 2 and 3.

[0124] Table 2 Performance Test Statistics of Sintered Stone

[0125]

[0126] Table 3 Performance Test Statistics of Sintered Stone (Continued)

[0127]

[0128] As can be seen from Tables 2 and 3, the rock slab prepared using the dry granule glaze of Example 2 of the present invention also has excellent mechanical properties, wear resistance, impact resistance, thermal shock resistance, frost resistance and glaze crack resistance.

[0129] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention do not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A dry-granule glaze with a starlight effect, characterized in that, Includes dry grain I and dry grain II; The chemical composition of the dry granules I, by mass percentage, includes SiO2: 55-58%, Al2O3: 8-12%, CaO: 2-4%, MgO: 1-2%, K2O: 1-3%, Na2O: 1-2%, ZrO2: 15-25%, B2O3: 3-5%, CeO2: 0.5-1.5%, LiCO3: 0.2-0.8%, Y2O3: 0.1-0.5%, BaCO3: 2-4%; The chemical composition of the dry granules II, by mass percentage, includes SiO2: 45-55%, Al2O3: 15-28%, CaO: 6-8%, MgO: 1.5-2%, K2O: 2.5-3.5%, Na2O: 3-4%, ZrO2: 1-2%, B2O3: 1-2.5%, CeO2: 0.2-0.5%, LiCO3: 0.8-1.5%, Y2O3: 0.1-0.2%, BaCO3: 2-3%.

2. The dry granule glaze with starlight effect according to claim 1, wherein the chemical composition of the dry granules I, by mass percentage, comprises SiO2: 55.8%, Al2O3: 11.2%, CaO: 2.6%, MgO: 1.2%, K2O: 1.6%, Na2O: 1.3%, ZrO2: 18.8%, B2O3: 3.3%, CeO2: 0.8%, LiCO3: 0.5%, Y2O3: 0.3%, BaCO3: 2.6%; The chemical composition of the dry granules II, by mass percentage, includes SiO2: 48.9%, Al2O3: 26.8%, CaO: 7.6%, MgO: 1.8%, K2O: 3.2%, Na2O: 3.6%, ZrO2: 1.7%, B2O3: 2.3%, CeO2: 0.3%, LiCO3: 1.2%, Y2O3: 0.1%, BaCO3: 2.5%.

3. The dry-granule glaze with starlight effect according to claim 2, characterized in that, The dry granule glaze with starlight effect also includes a suspending agent; the mass ratio of dry granules I, dry granules II and suspending agent is 25-35: 5-15: 55-65.

4. The dry-granule glaze with starlight effect according to claim 3, characterized in that, The suspending agent comprises polyvinylpyrrolidone, carboxyl-terminated polysiloxane, sodium carboxymethyl cellulose, and water.

5. The dry-granule glaze with starlight effect according to claim 4, characterized in that, The mass ratio of polyvinylpyrrolidone, carboxyl-terminated polysiloxane, and sodium carboxymethyl cellulose is 6-8:1:1-3:35-45.

6. The dry-granule glaze with starlight effect according to claim 5, characterized in that, The polyvinylpyrrolidone is selected from at least one of PVPK30 and PVPK60; the carboxyl-terminated polysiloxane is a carboxyl-terminated polydimethylsiloxane; the sodium carboxymethyl cellulose has a degree of substitution ≥0.9% and a viscosity of 1000-2000 mPa·s at 25°C.

7. The method for preparing the dry granular glaze with starlight effect according to any one of claims 1-6, characterized in that, Includes the following steps: The raw materials for dry granules I are mixed, melted, quenched, crushed and sieved to obtain dry granules I; The raw materials for Dry Granules II are mixed, melted, quenched, pulverized, and sieved to obtain Dry Granules II; Dry granules I, dry granules II, and suspending agent are mixed evenly to obtain dry granule glaze.

8. The application of the dry granular glaze with starlight effect as described in any one of claims 1-6 in the preparation of rock slabs.

9. A type of slab, characterized in that, The slab includes a blank, the surface of which is provided with a starlight glaze layer, the starlight glaze layer containing the dry granule glaze with starlight effect as described in any one of claims 1-6.

10. The slab according to claim 9, characterized in that, The chemical composition of the green body, by mass percentage, includes SiO2: 65-70%, Al2O3: 12-18%, Fe2O3: 0.3-0.7%, TiO2: 0.15-0.35%, MgO: 1-1.3%, CaO: 3-5%, K2O: 1.8-2.2%, Na2O: 1.8-2.3%, loss on ignition 4-6%.

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