High-flexibility glaze suitable for special-shaped ceramics and preparation method thereof

Abstract

This invention discloses a highly flexible glaze suitable for irregularly shaped ceramics and its preparation method, belonging to the field of glaze technology. The glaze comprises the following components: methyltriethoxysilane, ZnO-B2O3-SiO2 low-melting-point glass powder, vinylized SiO2 nanospheres, and cerium-doped zirconium oxide. First, methyltriethoxysilane is mixed with a solvent, and catalyst one is added dropwise to react and obtain a polysiloxane dispersion. Then, ZnO-B2O3-SiO2 low-melting-point glass powder and vinylized SiO2 nanospheres are dispersed in ethanol to obtain an inorganic glass powder dispersion. Next, the polysiloxane dispersion and the inorganic glass powder dispersion are mixed, and catalyst two and cerium-doped zirconium oxide are added and mixed. After standing to defoam, the glaze is obtained. The glaze provided by this invention can achieve self-repair of microscopic damage during firing and can also undergo conformational changes under stress, absorbing local stress and thus flexibly releasing impact force, exhibiting excellent flexibility and crack resistance.

Description

Technical Field

[0001] This invention belongs to the field of glaze technology, specifically relating to a highly flexible glaze suitable for irregularly shaped ceramics and its preparation method. Background Technology

[0002] Glaze is a vitreous coating applied to the surface of ceramics, primarily used to protect the ceramic substrate and enhance its aesthetics and functionality. Traditional glazes are mainly composed of inorganic materials such as silicates and borates, which are sintered at high temperatures to form a dense, glassy layer. Glazes are widely used in ceramic products, such as tableware, tiles, and sanitary ware, and possess excellent gloss, wear resistance, and chemical stability.

[0003] Traditional glazes typically exhibit high brittleness, high elastic modulus, and low fracture strain. This makes the glaze layer prone to microcracks on the complex shapes and curved surfaces of irregularly shaped ceramics. Especially under frequent thermal expansion and contraction and mechanical impact, these cracks easily propagate, leading to glaze layer damage. These defects cause the glaze layer to easily crack in complex shapes and usage environments, affecting the product's lifespan and aesthetics. Therefore, it is essential to develop highly flexible glazes suitable for irregularly shaped ceramics to improve their flexibility and crack resistance. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a highly flexible glaze suitable for irregularly shaped ceramics and its preparation method.

[0005] The first aspect of this invention is to provide a method for preparing a highly flexible glaze suitable for irregularly shaped ceramics, comprising the following steps:

[0006] S1: Mix methyltriethoxysilane with a solvent, and add catalyst one dropwise to react and obtain a polysiloxane dispersion;

[0007] S2: Disperse ZnO-B2O3-SiO2 low-melting glass powder and vinylated SiO2 nanospheres in ethanol to obtain an inorganic glass powder dispersion;

[0008] S3: Mix polysiloxane dispersion and inorganic glass powder dispersion, add catalyst II and cerium-doped zirconium oxide, let stand to defoam, and then obtain a high-flexibility glaze suitable for irregular ceramics.

[0009] The ZnO-B2O3-SiO2 low-melting glass powder used in this invention can be prepared by the following steps: ZnO, HBO2, nano-SiO2 and LiCO3 in a mass ratio of 30:25:45:0.5 are ball-milled and mixed in ethanol medium for 4 hours, then melted under inert gas protection, and finally ground to D50=5-6μm after being frozen with liquid nitrogen.

[0010] Alternatively, you can buy it directly from the market.

[0011] In some embodiments, vinylated SiO2 nanospheres are prepared by the following steps:

[0012] (1) SiO2 nanospheres were immersed in HF solution, washed and dried to obtain activated SiO2 nanospheres;

[0013] (2) Activated SiO2 nanospheres are dispersed in a dispersant, vinyltriethoxysilane and catalyst are added, and the reaction is carried out under inert gas protection. After the reaction is completed, the nanospheres are washed, centrifuged and dried to obtain vinylated SiO2 nanospheres.

[0014] In some embodiments, the mass ratio of SiO2 nanospheres to vinyltriethoxysilane is 20:2-4; the dispersant is selected from at least one of toluene and cyclohexanone; the catalyst is selected from at least one of triethylamine, tetramethylguanidine, and potassium carbonate; and the amount of catalyst is 2-4% of the amount of vinyltriethoxysilane.

[0015] In some embodiments, the mass ratio of methyltriethoxysilane to solvent is 2-4:5-8; the solvent is selected from at least one of anhydrous ethanol, isopropanol, and propylene glycol methyl ether.

[0016] In some embodiments, catalyst one is selected from at least one of glacial acetic acid, trifluoroacetic acid, and p-toluenesulfonic acid, and the amount of catalyst one is 1-3% of the amount of methyltriethoxysilane; catalyst two is dibutyltin dilaurate, and the amount of catalyst two is 1.25-8% of the amount of methyltriethoxysilane.

[0017] In some embodiments, the amount of ethanol used is 30-40% of the sum of the amounts of ZnO-B2O3-SiO2 low-melting glass powder and vinylated SiO2 nanospheres; the D50 of the ZnO-B2O3-SiO2 low-melting glass powder is 4-6 μm.

[0018] In some embodiments, in S1, the reaction temperature is 55-65°C and the reaction time is 2-3 h; in S3, the settling temperature is 20-30°C and the settling time is 6-8 h.

[0019] A second aspect of the present invention is to provide a highly flexible glaze suitable for irregularly shaped ceramics.

[0020] In some embodiments, the composition includes the following components by weight: 25-40 parts of methyltriethoxysilane, 55-70 parts of ZnO-B2O3-SiO2 low-melting glass powder, 3-8 parts of vinylized SiO2 nanospheres, and 1-3 parts of cerium-doped zirconium oxide.

[0021] In some embodiments, the highly flexible glaze suitable for irregularly shaped ceramics also includes pigments.

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

[0023] 1. This invention utilizes the hydrolysis of methyltriethoxysilane to generate a polysiloxane organic network, which bonds with the silanol groups on the surface of ZnO-B2O3-SiO2 low-melting-point glass powder to form a molecular hybrid structure. This not only enhances the interfacial bonding strength but also provides excellent chemical stability. When microcracks appear in the glaze layer, under heating conditions, the polysiloxane segments in the hybrid structure gain mobility, flowing towards the crack area and filling the cracks. Subsequently, during cooling, the flexible main chain segments in the molecules generally strengthen through the molecular hydrogen bonds between silanol groups (-SiOH), causing the polysiloxane molecules to aggregate more, achieving self-repair of microscopic damage. After melting, the ZnO-B2O3-SiO2 glass powder forms a continuous inorganic glass network, which, upon cooling, forms a dense glaze layer, imparting ceramic hardness and gloss to the surface.

[0024] 2. The present invention also embeds SiO2 nanospheres with vinyl groups grafted onto the surface into the hybrid structure. The vinyl segments can undergo conformational changes when subjected to force, absorbing local stress and thus flexibly releasing the impact force. The nanospheres, as rigid barriers, can force cracks to form an arc-shaped bend around the particles, thereby preventing the further propagation of cracks and greatly improving the flexibility of the glaze. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to specific embodiments.

[0026] Example 1

[0027] A highly flexible glaze suitable for irregularly shaped ceramics comprises the following components by weight: 30 parts of methyltriethoxysilane, 65 parts of ZnO-B2O3-SiO2 low-melting-point glass powder, 5 parts of vinylized SiO2 nanospheres, and 2 parts of cerium-doped zirconium oxide.

[0028] The ZnO-B2O3-SiO2 low-melting glass powder was prepared by the following steps: ZnO, HBO2, nano-SiO2 and LiCO3 in a mass ratio of 30:25:45:0.5 were ball-milled and mixed in ethanol medium for 4 hours, then melted under inert gas protection, frozen with liquid nitrogen and then ground.

[0029] Vinylated SiO2 nanospheres were prepared by the following steps:

[0030] (1) SiO2 nanospheres were immersed in HF solution, washed and dried to obtain activated SiO2 nanospheres;

[0031] (2) Activated SiO2 nanospheres are dispersed in toluene, vinyltriethoxysilane and triethylamine are added, and the reaction is carried out under inert gas protection. After the reaction is completed, the nanospheres are washed, centrifuged and dried to obtain vinylated SiO2 nanospheres. The mass ratio of SiO2 nanospheres to vinyltriethoxysilane is 20:3, and the amount of triethylamine is 3% of the amount of vinyltriethoxysilane.

[0032] The above-mentioned highly flexible glaze suitable for irregularly shaped ceramics is prepared by the following steps:

[0033] S1: Methyltriethoxysilane in a mass ratio of 3:6 was mixed with anhydrous ethanol, and glacial acetic acid was added dropwise. The mixture was reacted at 60°C for 2.5 h to obtain a polysiloxane dispersion; wherein the amount of glacial acetic acid used was 2% of the amount of methyltriethoxysilane used.

[0034] S2: ZnO-B2O3-SiO2 low-melting-point glass powder with a D50 of 5 μm and vinylated SiO2 nanospheres were dispersed in ethanol to obtain an inorganic glass powder dispersion; wherein, the amount of ethanol used was 35% of the sum of the amounts of ZnO-B2O3-SiO2 low-melting-point glass powder and vinylated SiO2 nanospheres.

[0035] S3: Mix the polysiloxane dispersion and the inorganic glass powder dispersion, add dibutyltin dilaurate and cerium-doped zirconium oxide, and let stand at 25°C for 7 h to defoam, and a high-flexibility glaze suitable for irregular ceramics is obtained; wherein, the amount of dibutyltin dilaurate is 4% of the amount of methyltriethoxysilane.

[0036] The aforementioned highly flexible glazes suitable for irregularly shaped ceramics can also be supplemented with various pigments according to actual needs.

[0037] Example 2

[0038] A highly flexible glaze suitable for irregularly shaped ceramics comprises the following components by weight: 40 parts of methyltriethoxysilane, 70 parts of ZnO-B2O3-SiO2 low-melting-point glass powder, 8 parts of vinylized SiO2 nanospheres, and 3 parts of cerium-doped zirconium oxide.

[0039] The ZnO-B2O3-SiO2 low-melting glass powder was prepared by the following steps: ZnO, HBO2, nano-SiO2 and LiCO3 in a mass ratio of 30:25:45:0.5 were ball-milled and mixed in ethanol medium for 4 hours, then melted under inert gas protection, frozen with liquid nitrogen and then ground.

[0040] Vinylated SiO2 nanospheres were prepared by the following steps:

[0041] (1) SiO2 nanospheres were immersed in HF solution, washed and dried to obtain activated SiO2 nanospheres;

[0042] (2) Activated SiO2 nanospheres are dispersed in cyclohexanone, vinyltriethoxysilane and tetramethylguanidine are added, and the reaction is carried out under inert gas protection. After the reaction is completed, the nanospheres are washed, centrifuged and dried to obtain vinylated SiO2 nanospheres. The mass ratio of SiO2 nanospheres to vinyltriethoxysilane is 20:4, and the amount of tetramethylguanidine is 4% of the amount of vinyltriethoxysilane.

[0043] The above-mentioned highly flexible glaze suitable for irregularly shaped ceramics is prepared by the following steps:

[0044] S1: Methyltriethoxysilane and isopropanol were mixed in a mass ratio of 1:2, and trifluoroacetic acid was added dropwise. The mixture was reacted at 65°C for 3 h to obtain a polysiloxane dispersion; wherein the amount of trifluoroacetic acid used was 3% of the amount of methyltriethoxysilane used.

[0045] S2: ZnO-B2O3-SiO2 low-melting-point glass powder with a D50 of 6 μm and vinylated SiO2 nanospheres were dispersed in ethanol to obtain an inorganic glass powder dispersion; wherein, the amount of ethanol used was 40% of the sum of the amounts of ZnO-B2O3-SiO2 low-melting-point glass powder and vinylated SiO2 nanospheres.

[0046] S3: Mix the polysiloxane dispersion and the inorganic glass powder dispersion, add dibutyltin dilaurate and cerium-doped zirconium oxide, and let stand at 30°C for 8 hours to defoam, and a high-flexibility glaze suitable for irregular ceramics is obtained; wherein, the amount of dibutyltin dilaurate is 8% of the amount of methyltriethoxysilane.

[0047] The aforementioned highly flexible glazes suitable for irregularly shaped ceramics can also be supplemented with various pigments according to actual needs.

[0048] Example 3

[0049] A highly flexible glaze suitable for irregularly shaped ceramics comprises the following components by weight: 25 parts of methyltriethoxysilane, 55 parts of ZnO-B2O3-SiO2 low-melting-point glass powder, 3 parts of vinylized SiO2 nanospheres, and 1 part of cerium-doped zirconium oxide.

[0050] The ZnO-B2O3-SiO2 low-melting glass powder was prepared by the following steps: ZnO, HBO2, nano-SiO2 and LiCO3 in a mass ratio of 30:25:45:0.5 were ball-milled and mixed in ethanol medium for 4 hours, then melted under inert gas protection, frozen with liquid nitrogen and then ground.

[0051] Vinylated SiO2 nanospheres were prepared by the following steps:

[0052] (1) SiO2 nanospheres were immersed in HF solution, washed and dried to obtain activated SiO2 nanospheres;

[0053] (2) Activated SiO2 nanospheres are dispersed in toluene, vinyltriethoxysilane and potassium carbonate are added, and the reaction is carried out under inert gas protection. After the reaction is completed, the nanospheres are washed, centrifuged and dried to obtain vinylated SiO2 nanospheres. The mass ratio of SiO2 nanospheres to vinyltriethoxysilane is 10:1, and the amount of potassium carbonate is 2% of the amount of vinyltriethoxysilane.

[0054] The above-mentioned highly flexible glaze suitable for irregularly shaped ceramics is prepared by the following steps:

[0055] S1: Methyltriethoxysilane and propylene glycol methyl ether were mixed in a mass ratio of 2:5, and p-toluenesulfonic acid was added dropwise. The mixture was reacted at 55°C for 3 h to obtain a polysiloxane dispersion; wherein the amount of p-toluenesulfonic acid was 1% of the amount of methyltriethoxysilane.

[0056] S2: ZnO-B2O3-SiO2 low-melting-point glass powder with a D50 of 4 μm and vinylated SiO2 nanospheres were dispersed in ethanol to obtain an inorganic glass powder dispersion; wherein, the amount of ethanol used was 30% of the sum of the amounts of ZnO-B2O3-SiO2 low-melting-point glass powder and vinylated SiO2 nanospheres.

[0057] S3: Mix the polysiloxane dispersion and the inorganic glass powder dispersion, add dibutyltin dilaurate and cerium-doped zirconium oxide, and let stand at 20°C for 6 h to defoam, and a high-flexibility glaze suitable for irregular ceramics is obtained; wherein, the amount of dibutyltin dilaurate is 1.25% of the amount of methyltriethoxysilane.

[0058] The aforementioned highly flexible glazes suitable for irregularly shaped ceramics can also be supplemented with various pigments according to actual needs.

[0059] Example 4

[0060] A highly flexible glaze suitable for irregularly shaped ceramics comprises the following components by weight: 35 parts of methyltriethoxysilane, 65 parts of ZnO-B2O3-SiO2 low-melting-point glass powder, 6 parts of vinylized SiO2 nanospheres, and 2 parts of cerium-doped zirconium oxide.

[0061] The ZnO-B2O3-SiO2 low-melting glass powder was prepared by the following steps: ZnO, HBO2, nano-SiO2 and LiCO3 in a mass ratio of 30:25:45:0.5 were ball-milled and mixed in ethanol medium for 4 hours, then melted under inert gas protection, frozen with liquid nitrogen and then ground.

[0062] Vinylated SiO2 nanospheres were prepared by the following steps:

[0063] (1) SiO2 nanospheres were immersed in HF solution, washed and dried to obtain activated SiO2 nanospheres;

[0064] (2) Activated SiO2 nanospheres are dispersed in toluene, vinyltriethoxysilane and triethylamine are added, and the reaction is carried out under inert gas protection. After the reaction is completed, the nanospheres are washed, centrifuged and dried to obtain vinylated SiO2 nanospheres. The mass ratio of SiO2 nanospheres to vinyltriethoxysilane is 20:3, and the amount of triethylamine is 4% of the amount of vinyltriethoxysilane.

[0065] The above-mentioned highly flexible glaze suitable for irregularly shaped ceramics is prepared by the following steps:

[0066] S1: Methyltriethoxysilane in a mass ratio of 3:7 was mixed with anhydrous ethanol, and glacial acetic acid was added dropwise. The mixture was reacted at 60°C for 2 h to obtain a polysiloxane dispersion; wherein the amount of glacial acetic acid used was 3% of the amount of methyltriethoxysilane used.

[0067] S2: ZnO-B2O3-SiO2 low-melting-point glass powder with a D50 of 4 μm and vinylated SiO2 nanospheres were dispersed in ethanol to obtain an inorganic glass powder dispersion; wherein, the amount of ethanol used was 38% of the sum of the amounts of ZnO-B2O3-SiO2 low-melting-point glass powder and vinylated SiO2 nanospheres.

[0068] S3: Mix the polysiloxane dispersion and the inorganic glass powder dispersion, add dibutyltin dilaurate and cerium-doped zirconium oxide, and let stand at 25°C for 8 hours to defoam, and a high-flexibility glaze suitable for irregular ceramics is obtained; wherein, the amount of dibutyltin dilaurate is 6% of the amount of methyltriethoxysilane.

[0069] The aforementioned highly flexible glazes suitable for irregularly shaped ceramics can also be supplemented with various pigments according to actual needs.

[0070] Example 5

[0071] A highly flexible glaze suitable for irregularly shaped ceramics comprises the following components by weight: 30 parts of methyltriethoxysilane, 65 parts of ZnO-B2O3-SiO2 low-melting-point glass powder, 5 parts of vinylized SiO2 nanospheres, and 2 parts of cerium-doped zirconium oxide.

[0072] The ZnO-B2O3-SiO2 low-melting glass powder was prepared by the following steps: ZnO, HBO2, nano-SiO2 and LiCO3 in a mass ratio of 30:25:45:0.5 were ball-milled and mixed in ethanol medium for 4 hours, then melted under inert gas protection, frozen with liquid nitrogen and then ground.

[0073] Vinylated SiO2 nanospheres were prepared by the following steps:

[0074] (1) SiO2 nanospheres were immersed in HF solution, washed and dried to obtain activated SiO2 nanospheres;

[0075] (2) Activated SiO2 nanospheres are dispersed in cyclohexanone, vinyltriethoxysilane and potassium carbonate are added, and the reaction is carried out under inert gas protection. After the reaction is completed, the nanospheres are washed, centrifuged and dried to obtain vinylated SiO2 nanospheres. The mass ratio of SiO2 nanospheres to vinyltriethoxysilane is 20:3, and the amount of potassium carbonate is 2% of the amount of vinyltriethoxysilane.

[0076] The above-mentioned highly flexible glaze suitable for irregularly shaped ceramics is prepared by the following steps:

[0077] S1: Methyltriethoxysilane and isopropanol were mixed in a mass ratio of 4:5, and p-toluenesulfonic acid was added dropwise. The mixture was reacted at 60°C for 3 h to obtain a polysiloxane dispersion; wherein the amount of p-toluenesulfonic acid was 1% of the amount of methyltriethoxysilane.

[0078] S2: ZnO-B2O3-SiO2 low-melting-point glass powder with a D50 of 4 μm and vinylated SiO2 nanospheres were dispersed in ethanol to obtain an inorganic glass powder dispersion; wherein, the amount of ethanol used was 32% of the sum of the amounts of ZnO-B2O3-SiO2 low-melting-point glass powder and vinylated SiO2 nanospheres.

[0079] S3: Mix the polysiloxane dispersion and the inorganic glass powder dispersion, add dibutyltin dilaurate and cerium-doped zirconium oxide, and let stand at 25°C for 8 hours to defoam, and a high-flexibility glaze suitable for irregular ceramics is obtained; wherein, the amount of dibutyltin dilaurate is 3% of the amount of methyltriethoxysilane.

[0080] The aforementioned highly flexible glazes suitable for irregularly shaped ceramics can also be supplemented with various pigments according to actual needs.

[0081] Comparative Example 1

[0082] It is basically the same as Example 1, except that the vinylized SiO2 nanospheres are replaced with the same amount of ordinary SiO2 nanospheres.

[0083] Comparative Example 2

[0084] It is basically the same as Example 1, except that methyltriethoxysilane is replaced with the same amount of hydroxyl-terminated polydimethylsiloxane.

[0085] Comparative Example 3

[0086] It is basically the same as Example 1, except that the ZnO-B2O3-SiO2 low-melting glass powder is replaced with the same amount of ordinary soda-lime-silicon glass powder.

[0087] The glazes obtained from the comparative examples and embodiments were applied to the zirconia blanks, with a glaze thickness of 50±5μm. Argon gas was introduced throughout the process, and the glazed zirconia blanks were dried at 80°C for 20 min. Then, the temperature was increased to 250°C at a rate of 2°C / min, and then increased to 580°C at a rate of 5°C / min. After cooling to 300°C in the furnace, the blanks were air-cooled to obtain the glaze surface. The appearance of the fired glaze surface, such as pinholes and cracks, was observed.

[0088] The fracture toughness of the zirconia preforms obtained by glazing and firing in the examples and comparative examples was tested using the three-point bending method.

[0089] Table 1

[0090]

[0091] As can be seen from Table 1, the glazes provided in Examples 1-5 have excellent toughness and can avoid cracking during firing, while the glazes prepared in Comparative Examples 1-3 show a significant decrease in crack resistance and flexibility.

[0092] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A method for preparing a highly flexible glaze suitable for irregularly shaped ceramics, characterized in that, Includes the following steps: S1: Mix methyltriethoxysilane with a solvent, and add catalyst one dropwise to react and obtain a polysiloxane dispersion; S2: Disperse ZnO-B2O3-SiO2 low-melting glass powder and vinylated SiO2 nanospheres in ethanol to obtain an inorganic glass powder dispersion; S3: Mix the polysiloxane dispersion and the inorganic glass powder dispersion, add catalyst 2 and cerium-doped zirconium oxide, let stand to defoam, and then obtain the high-flexibility glaze suitable for irregular ceramics; wherein, catalyst 2 is dibutyltin dilaurate.

2. The high-flexibility glaze suitable for irregularly shaped ceramics according to claim 1, characterized in that, The vinylized SiO2 nanospheres were prepared by the following steps: SiO2 nanospheres were immersed in HF solution, washed, and dried to obtain activated SiO2 nanospheres; The activated SiO2 nanospheres were dispersed in a dispersant, and vinyltriethoxysilane and catalyst III were added. The reaction was carried out under inert gas protection. After the reaction was completed, the nanospheres were washed, centrifuged, and dried to obtain the vinylated SiO2 nanospheres.

3. The high-flexibility glaze suitable for irregularly shaped ceramics according to claim 2, characterized in that, The mass ratio of the SiO2 nanospheres to the vinyltriethoxysilane is 20:2-4; the dispersant is selected from at least one of toluene and cyclohexanone; the catalyst is selected from at least one of triethylamine, tetramethylguanidine, and potassium carbonate; the amount of the catalyst is 2-4% of the amount of vinyltriethoxysilane.

4. The high-flexibility glaze suitable for irregularly shaped ceramics according to claim 1, characterized in that, The mass ratio of the methyltriethoxysilane to the solvent is 2-4:5-8; the solvent is selected from at least one of anhydrous ethanol, isopropanol, and propylene glycol methyl ether.

5. The high-flexibility glaze suitable for irregularly shaped ceramics according to claim 1, characterized in that, The first catalyst is selected from at least one of glacial acetic acid, trifluoroacetic acid, and p-toluenesulfonic acid, and the amount of the first catalyst is 1-3% of the amount of methyltriethoxysilane; the amount of the second catalyst is 1.25-8% of the amount of methyltriethoxysilane.

6. The high-flexibility glaze suitable for irregularly shaped ceramics according to claim 1, characterized in that, The amount of ethanol used is 30-40% of the sum of the amounts of the ZnO-B2O3-SiO2 low-melting glass powder and the vinylated SiO2 nanospheres; the D50 of the ZnO-B2O3-SiO2 low-melting glass powder is 4-6 μm.

7. The high-flexibility glaze suitable for irregularly shaped ceramics according to claim 1, characterized in that, In step S1, the reaction temperature is 55-65℃ and the reaction time is 2-3 h; in step S3, the settling temperature is 20-30℃ and the settling time is 6-8 h.

8. A highly flexible glaze suitable for irregularly shaped ceramics prepared by the preparation method according to any one of claims 1-7.

9. The high-flexibility glaze suitable for irregularly shaped ceramics according to claim 8, characterized in that, By weight, it includes the following components: 25-40 parts of methyltriethoxysilane, 55-70 parts of ZnO-B2O3-SiO2 low-melting glass powder, 3-8 parts of vinylized SiO2 nanospheres, and 1-3 parts of cerium-doped zirconium oxide.

10. The high-flexibility glaze suitable for irregularly shaped ceramics according to claim 8, characterized in that, The highly flexible glaze suitable for irregularly shaped ceramics also includes pigments.

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