Glaze for preventing deformation of ceramic tiles and anti-deformation ceramic tile

Abstract

This invention belongs to the field of building materials technology. Specifically, it discloses a glaze for preventing ceramic tile deformation and an anti-deformation ceramic tile, comprising the following raw materials in parts by weight: 15-30 parts spodumene, 15-30 parts calcite, 12-20 parts bauxite, 8-15 parts pyrophyllite, 6-12 parts modified magnesium borate whiskers, 5-9 parts wet-process mica powder, 3-6 parts palygorskite, 1-2.5 parts calcium borate, 1-2 parts tricalcium silicate, and 0.2-0.7 parts ammonium fluoride. The system of this invention uses spodumene, calcite, bauxite, and pyrophyllite as the matrix minerals, effectively lowering the sintering temperature and providing basic strength to the system. At a lower firing temperature, a high degree of sintering of the glaze layer can be ensured, preventing sintering failure of other materials. By adding modified magnesium borate whiskers and wet-process mica powder, the flexural strength is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of building materials technology, specifically to a glaze for preventing ceramic tile deformation and an anti-deformation ceramic tile. Background Technology

[0002] In actual production, due to the high technical difficulty of porcelain tile manufacturing, the products have varying degrees of defects, among which deformation has a significant impact on product quality.

[0003] Studies have shown that tile deformation is mainly affected by the following factors: ① Tiles expand and contract with temperature changes, and deformation is caused by the coefficient of thermal expansion; ② Water ingress can cause cracking; ③ Uneven stress on the tiles can also lead to cracking; ④ Insufficient tile strength can cause deformation over long-term use. In some public areas (such as shopping malls), where air conditioning and / or heating are used year-round to maintain a stable temperature of 20±5℃, tile deformation in these areas is primarily affected by strength.

[0004] Therefore, how to improve the strength of ceramic tiles has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This invention provides a glaze for preventing ceramic tile deformation and an anti-deformation ceramic tile. The glaze effectively improves flexural strength and can effectively prevent the glaze surface from expanding when heated and contracting when cooled, thereby effectively preventing deformation.

[0006] The present invention solves its technical problem by adopting the following technical solution:

[0007] A glaze for preventing ceramic tile deformation comprises the following raw materials in parts by weight: 15-30 parts spodumene, 15-30 parts calcite, 12-20 parts bauxite, 8-15 parts pyrophyllite, 6-12 parts modified magnesium borate whiskers, 5-9 parts wet-process mica powder, 3-6 parts palygorskite, 1-2.5 parts calcium borate, 1-2 parts tricalcium silicate, and 0.2-0.7 parts ammonium fluoride;

[0008] The bulk density of the wet-processed mica powder is 0.2~0.3 g / cm³. 3 The average particle size is 35~60μm and the aspect ratio is 70~90.

[0009] As a preferred embodiment of the present invention, the preparation raw materials include the following parts by weight: 20-30 parts spodumene, 15-25 parts calcite, 15-20 parts bauxite, 10-15 parts pyrophyllite, 8-12 parts modified magnesium borate whiskers, 6-9 parts wet-process mica powder, 4-6 parts palygorskite, 1.5-2.5 parts calcium borate, 1-1.5 parts tricalcium silicate, and 0.4-0.7 parts ammonium fluoride.

[0010] As a preferred embodiment of the present invention, the preparation raw materials include the following parts by weight: 23.3 parts spodumene, 20 parts calcite, 18 parts bauxite, 12 parts pyrophyllite, 10 parts modified magnesium borate whiskers, 8 parts wet-process mica powder, 5 parts palygorskite, 2 parts calcium borate, 1.2 parts tricalcium silicate, and 0.5 parts ammonium fluoride.

[0011] In a preferred embodiment of the present invention, the bulk density of the wet-processed mica powder is 0.22~0.25 g / cm³. 3 The average particle size is 38~52μm and the aspect ratio is 80.

[0012] As a preferred embodiment of the present invention, the method for preparing the modified magnesium borate whiskers includes the following steps:

[0013] (1) Add magnesium borate whiskers and coupling agent to water and stir until homogeneous to obtain whisker dispersion;

[0014] (2) Add hydrogen peroxide dropwise to the whisker dispersion, stir evenly, then add limestone powder, stir evenly, and obtain whisker precursor solution;

[0015] (3) Add polydopamine-modified carbon nanotubes to the whisker precursor solution, stir evenly in a water bath at 55~80℃, then sonicate in a water bath at 55~80℃, and dry to obtain modified magnesium borate whiskers.

[0016] In a preferred embodiment of the present invention, the mass ratio of the magnesium borate whiskers, coupling agent, and water is 1:(0.01~0.1):(4~20); and / or

[0017] The mass ratio of hydrogen peroxide, whisker dispersion, and limestone powder is (0.01~0.1):1:(0.1~0.4); and / or

[0018] The mass ratio of the polydopamine-modified carbon nanotubes to the whisker precursor solution is (0.05~0.2):1.

[0019] As a preferred embodiment of the present invention, the coupling agent includes at least one of γ-methacryloxypropyltris(trimethylsiloxane), γ-methacryloxypropyltriisopropoxysilane, 3-methacryloxypropyltriethoxysilane, and 3-(methacryloxy)propylmethyldiethoxysilane.

[0020] As a preferred embodiment of the present invention, the method for preparing the polydopamine-modified carbon nanotubes includes the following steps:

[0021] Single-walled carbon nanotubes were dispersed in deionized water, dopamine hydrochloride was added, and the pH was adjusted to 8.4-8.6 with Tris buffer. The mixture was stirred evenly and dried to obtain polydopamine-modified carbon nanotubes.

[0022] The mass ratio of the single-walled carbon nanotubes to dopamine hydrochloride is 1:(0.2~0.8).

[0023] In a preferred embodiment of the present invention, the power of the ultrasonic treatment is 500~800W and the time is 20~50min.

[0024] The present invention also provides a ceramic tile, comprising a body and a surface glaze layer disposed on the body, wherein the surface glaze layer is prepared using the glaze described above.

[0025] The beneficial effects of the present invention are as follows: (1) The present invention creatively combines the above raw materials to obtain a glaze with excellent flexural strength. In the system of the present invention, spodumene, calcite, bauxite and pyrophyllite are used as matrix minerals, which effectively reduces the sintering temperature and provides basic strength for the system. At a lower firing temperature, the glaze layer can be guaranteed to have a high degree of sintering and prevent other materials from failing to sinter. By adding modified magnesium borate whiskers and wet mica powder, the flexural strength is effectively improved. (2) The present invention uses wet mica powder with specific bulk density, particle size and aspect ratio, which can work together with modified magnesium borate whiskers to uniformly fill the pores of the glaze surface and prevent excessive local stress. At the same time, wet mica powder and modified magnesium borate whiskers can form a grain interlocking structure and interweave with each other, which effectively improves the flexural strength. At the same time, it can effectively prevent the glaze surface from expanding when heated and shrinking when cooled, thereby effectively preventing deformation. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] In this invention, the technical features described in an open-ended manner include both closed-ended technical solutions composed of the listed features and open-ended technical solutions that include the listed features.

[0028] In this invention, numerical ranges are involved. Unless otherwise specified, the numerical ranges are considered continuous and include the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe features or characteristics, the ranges may be merged. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are included.

[0029] In this invention, there are no particular limitations on the specific dispersion and stirring methods.

[0030] Unless otherwise specified, all reagents or instruments used in this invention are commercially available products. Unless otherwise specified, all raw materials used in the embodiments and comparative examples of this invention are commercially available, and all raw materials used in parallel experiments are the same.

[0031] This invention provides a glaze for preventing ceramic tile deformation, comprising the following raw materials in parts by weight: 15-30 parts spodumene, 15-30 parts calcite, 12-20 parts bauxite, 8-15 parts pyrophyllite, 6-12 parts modified magnesium borate whiskers, 5-9 parts wet-process mica powder, 3-6 parts palygorskite, 1-2.5 parts calcium borate, 1-2 parts tricalcium silicate, and 0.2-0.7 parts ammonium fluoride;

[0032] The bulk density of the wet-processed mica powder is 0.2~0.3 g / cm³. 3 The average particle size is 35~60μm and the aspect ratio is 70~90.

[0033] This invention creatively combines the above-mentioned raw materials to obtain a glaze with excellent flexural strength. The system of this invention uses spodumene, calcite, bauxite, and pyrophyllite (also known as pyrophyllite) as the matrix minerals, which effectively reduces the sintering temperature and provides basic strength to the system. At a lower firing temperature, the glaze layer can be guaranteed to have a high degree of sintering, preventing the sintering failure of other materials. By adding modified magnesium borate whiskers and wet-process mica powder, the flexural strength is effectively improved.

[0034] Among them, modified magnesium borate whiskers and wet-process mica powder have a significant synergistic effect in improving flexural strength. Adding either modified magnesium borate whiskers or wet-process mica powder alone will not achieve the desired effect; both need to be added simultaneously.

[0035] This invention uses wet-process mica powder with specific bulk density, particle size, and aspect ratio, which can work together with modified magnesium borate whiskers to uniformly fill the pores of the glaze surface, preventing excessive local stress. At the same time, the wet-process mica powder and modified magnesium borate whiskers can form an interlocking grain structure, which effectively improves the flexural strength and prevents the glaze surface from expanding when heated and contracting when cooled, thus effectively preventing deformation.

[0036] In some embodiments, the preparation raw materials include the following parts by weight: 20-30 parts spodumene, 15-25 parts calcite, 15-20 parts bauxite, 10-15 parts pyrophyllite, 8-12 parts modified magnesium borate whiskers, 6-9 parts wet-process mica powder, 4-6 parts palygorskite, 1.5-2.5 parts calcium borate, 1-1.5 parts tricalcium silicate, and 0.4-0.7 parts ammonium fluoride.

[0037] In some embodiments, the preparation raw materials include the following parts by weight: 23.3 parts spodumene, 20 parts calcite, 18 parts bauxite, 12 parts pyrophyllite, 10 parts modified magnesium borate whiskers, 8 parts wet-process mica powder, 5 parts palygorskite, 2 parts calcium borate, 1.2 parts tricalcium silicate, and 0.5 parts ammonium fluoride.

[0038] In some embodiments, the bulk density of the wet-processed mica powder is 0.22~0.25 g / cm³. 3 The average particle size is 38~52μm and the aspect ratio is 80.

[0039] In some embodiments, the method for preparing the modified magnesium borate whiskers includes the following steps:

[0040] (1) Add magnesium borate whiskers and coupling agent to water and stir until homogeneous to obtain whisker dispersion;

[0041] (2) Add hydrogen peroxide dropwise to the whisker dispersion, stir evenly, then add limestone powder, stir evenly, and obtain whisker precursor solution;

[0042] (3) Add polydopamine-modified carbon nanotubes to the whisker precursor solution, stir evenly in a water bath at 55~80℃, then sonicate in a water bath at 55~80℃, and dry to obtain modified magnesium borate whiskers.

[0043] This invention creatively couples and treats magnesium borate whiskers with hydrogen peroxide, then mixes them with limestone powder, and finally modifies them with polydopamine-modified carbon nanotubes to obtain magnesium borate whiskers that can significantly improve the flexural strength of glaze.

[0044] The treatment with coupling agents and hydrogen peroxide enriches the surface with multiple functional groups, effectively improving its activity. Limestone powder hydrates immediately under the action of water, generating a large number of calcium ions, which can bind and aggregate on the surface of magnesium borate whiskers. During sintering, it can promote the formation of an interlocking structure with wet mica powder, while improving the stability and dispersibility of magnesium borate whiskers. Polydopamine-modified carbon nanotubes can effectively chemically connect with multiple functional groups on the surface of magnesium borate whiskers, further improving their strength.

[0045] The inventors of this invention have discovered that magnesium borate whiskers prepared by different modification methods have different effects on improving flexural strength. Magnesium borate whiskers prepared using the modified magnesium borate whiskers described in this invention can significantly improve flexural strength compared to modified magnesium borate whiskers prepared by other methods.

[0046] In some embodiments, the mass ratio of the magnesium borate whiskers, coupling agent, and water is 1:(0.01~0.1):(4~20); and / or

[0047] The mass ratio of hydrogen peroxide, whisker dispersion, and limestone powder is (0.01~0.1):1:(0.1~0.4); and / or

[0048] The mass ratio of the polydopamine-modified carbon nanotubes to the whisker precursor solution is (0.05~0.2):1.

[0049] In some embodiments, the coupling agent includes at least one of γ-methacryloxypropyltris(trimethylsiloxane), γ-methacryloxypropyltriisopropoxysilane, 3-methacryloxypropyltriethoxysilane, and 3-(methacryloxy)propylmethyldiethoxysilane.

[0050] In some embodiments, the method for preparing the polydopamine-modified carbon nanotubes includes the following steps:

[0051] Single-walled carbon nanotubes were dispersed in deionized water, dopamine hydrochloride was added, and the pH was adjusted to 8.4-8.6 with Tris buffer. The mixture was stirred evenly and dried to obtain polydopamine-modified carbon nanotubes.

[0052] The mass ratio of the single-walled carbon nanotubes to dopamine hydrochloride is 1:(0.2~0.8).

[0053] In some embodiments, the ultrasonic treatment has a power of 500-800W and a duration of 20-50 minutes.

[0054] The present invention also provides a ceramic tile, comprising a body and a surface glaze layer disposed on the body, wherein the surface glaze layer is prepared using the glaze described above.

[0055] The present invention is further illustrated below with specific embodiments: Example 1

[0056] A glaze for preventing ceramic tile deformation comprises the following raw materials in parts by weight: 23.3 parts spodumene, 20 parts calcite, 18 parts bauxite, 12 parts pyrophyllite, 10 parts modified magnesium borate whiskers, 8 parts wet-process mica powder, 5 parts palygorskite, 2 parts calcium borate, 1.2 parts tricalcium silicate, and 0.5 parts ammonium fluoride.

[0057] The wet-process mica powder was purchased from Huajing Mica, product model W-200, with a bulk density of 0.25 g / cm³. 3 The average particle size is 52 μm and the aspect ratio is 80.

[0058] The method for preparing the modified magnesium borate whiskers includes the following steps:

[0059] (1) Magnesium borate whiskers and 3-methacryloxypropyltriethoxysilane were added to water and stirred at 500 rpm for 10 h to obtain a whisker dispersion; the mass ratio of magnesium borate whiskers, 3-methacryloxypropyltriethoxysilane and water was 1:0.05:10.

[0060] (2) Add 30% hydrogen peroxide by volume to the whisker dispersion, stir evenly, then add limestone powder, and stir at 500 rpm for 10 h to obtain the whisker precursor solution; the mass ratio of hydrogen peroxide, whisker dispersion and limestone powder is 0.05:1:0.2.

[0061] (3) Disperse single-walled carbon nanotubes in deionized water, add dopamine hydrochloride, adjust the pH to 8.5 with Tris buffer, stir evenly, and dry to obtain polydopamine modified carbon nanotubes; the mass ratio of single-walled carbon nanotubes, dopamine hydrochloride and deionized water is 1:0.5:10.

[0062] (4) Add polydopamine-modified carbon nanotubes to the whisker precursor solution, stir at 500 rpm for 12 h in a 60°C water bath, then sonicate at 600 W for 30 min in a 60°C water bath, and dry to obtain modified magnesium borate whiskers.

[0063] The mass ratio of the polydopamine-modified carbon nanotubes to the whisker precursor solution is 0.1:1.

[0064] The magnesium borate whiskers were purchased from Chengdu Haoming Technology Development Co., Ltd., product model MBWK-1, with an aspect ratio of 10~20 and a bulk density of 0.3~0.4 g / cm³. 3 .

[0065] The single-walled carbon nanotubes were purchased from Zhongke Leiming, product model CNT100, with a diameter of 1~2nm, a length of 5~30μm, and a bulk density of 0.14g / cm³. 3 .

[0066] Example 2

[0067] A glaze for preventing ceramic tile deformation comprises the following raw materials in parts by weight: 26.8 parts spodumene, 15 parts calcite, 20 parts bauxite, 12 parts pyrophyllite, 12 parts modified magnesium borate whiskers, 5 parts wet-process mica powder, 6 parts palygorskite, 1 part calcium borate, 2 parts tricalcium silicate, and 0.2 parts ammonium fluoride.

[0068] The wet-process mica powder was purchased from Huajing Mica, product model W-200, with a bulk density of 0.25 g / cm³. 3 The average particle size is 52 μm and the aspect ratio is 80.

[0069] The method for preparing the modified magnesium borate whiskers includes the following steps:

[0070] (1) Magnesium borate whiskers and 3-methacryloxypropyltriethoxysilane were added to water and stirred at 500 rpm for 10 h to obtain a whisker dispersion; the mass ratio of magnesium borate whiskers, 3-methacryloxypropyltriethoxysilane and water was 1:(0.01~0.1):10; the mass ratio of magnesium borate whiskers, 3-methacryloxypropyltriethoxysilane and water was 1:0.1:2;

[0071] (2) Add 30% hydrogen peroxide by volume to the whisker dispersion, stir evenly, then add limestone powder, and stir at 500 rpm for 10 h to obtain the whisker precursor solution; the mass ratio of hydrogen peroxide, whisker dispersion and limestone powder is 0.1:1:0.1.

[0072] (3) Disperse single-walled carbon nanotubes in deionized water, add dopamine hydrochloride, adjust the pH to 8.5 with Tris buffer, stir evenly, and dry to obtain polydopamine-modified carbon nanotubes; the mass ratio of single-walled carbon nanotubes, dopamine hydrochloride and deionized water is 1:0.2:10.

[0073] (4) Add polydopamine-modified carbon nanotubes to the whisker precursor solution, stir at 500 rpm for 12 h in a 60°C water bath, then sonicate at 600 W for 30 min in a 60°C water bath, and dry to obtain modified magnesium borate whiskers.

[0074] The mass ratio of the polydopamine-modified carbon nanotubes to the whisker precursor solution is 0.5:1.

[0075] The magnesium borate whiskers were purchased from Chengdu Haoming Technology Development Co., Ltd., product model MBWK-1, with an aspect ratio of 10~20 and a bulk density of 0.3~0.4 g / cm³. 3 .

[0076] The single-walled carbon nanotubes were purchased from Zhongke Leiming, product model CNT100, with a diameter of 1~2nm, a length of 5~30μm, and a bulk density of 0.14g / cm³. 3 .

[0077] Example 3

[0078] A glaze for preventing ceramic tile deformation comprises the following raw materials in parts by weight: 27.8 parts spodumene, 30 parts calcite, 12 parts bauxite, 8 parts pyrophyllite, 6 parts modified magnesium borate whiskers, 9 parts wet-process mica powder, 3 parts palygorskite, 2.5 parts calcium borate, 1 part tricalcium silicate, and 0.7 parts ammonium fluoride.

[0079] The wet-process mica powder was purchased from Huajing Mica, product model W-200, with a bulk density of 0.25 g / cm³. 3 The average particle size is 52 μm and the aspect ratio is 80.

[0080] The method for preparing the modified magnesium borate whiskers includes the following steps:

[0081] (1) Magnesium borate whiskers and 3-methacryloxypropyltriethoxysilane were added to water and stirred at 500 rpm for 10 h to obtain a whisker dispersion; the mass ratio of magnesium borate whiskers, 3-methacryloxypropyltriethoxysilane and water was 1:0.01:4.

[0082] (2) Add 30% hydrogen peroxide by volume to the whisker dispersion, stir evenly, then add limestone powder, and stir at 500 rpm for 10 h to obtain the whisker precursor solution; the mass ratio of hydrogen peroxide, whisker dispersion and limestone powder is 0.01:1:0.2.

[0083] (3) Disperse single-walled carbon nanotubes in deionized water, add dopamine hydrochloride, adjust the pH to 8.5 with Tris buffer, stir evenly, and dry to obtain polydopamine modified carbon nanotubes; the mass ratio of single-walled carbon nanotubes, dopamine hydrochloride and deionized water is 1:0.8:10.

[0084] (4) Add polydopamine-modified carbon nanotubes to the whisker precursor solution, stir at 500 rpm for 12 h in a 60°C water bath, then sonicate at 600 W for 30 min in a 60°C water bath, and dry to obtain modified magnesium borate whiskers.

[0085] The mass ratio of the polydopamine-modified carbon nanotubes to the whisker precursor solution is 0.2:1.

[0086] The magnesium borate whiskers were purchased from Chengdu Haoming Technology Development Co., Ltd., product model MBWK-1, with an aspect ratio of 10~20 and a bulk density of 0.3~0.4 g / cm³.3 .

[0087] The single-walled carbon nanotubes were purchased from Zhongke Leiming, product model CNT100, with a diameter of 1~2nm, a length of 5~30μm, and a bulk density of 0.14g / cm³. 3 .

[0088] Example 4

[0089] The difference between Example 4 and Example 1 is that the wet-processed mica powder is different, but everything else is the same.

[0090] A glaze for preventing ceramic tile deformation comprises the following raw materials in parts by weight: 23.3 parts spodumene, 20 parts calcite, 18 parts bauxite, 12 parts pyrophyllite, 10 parts modified magnesium borate whiskers, 8 parts wet-process mica powder, 5 parts palygorskite, 2 parts calcium borate, 1.2 parts tricalcium silicate, and 0.5 parts ammonium fluoride.

[0091] The wet-process mica powder was purchased from Huajing Mica, product model W-325, with a bulk density of 0.22 g / cm³. 3 The average particle size is 38 μm and the aspect ratio is 80. Comparative Example 1

[0092] The difference between Comparative Example 1 and Example 1 is that Comparative Example 1 does not contain wet-process mica powder, while this comparative example uses an equal amount of modified magnesium borate whiskers to replace the wet-process mica powder, and everything else is the same.

[0093] A glaze for preventing ceramic tile deformation comprises the following raw materials in parts by weight: 23.3 parts spodumene, 20 parts calcite, 18 parts bauxite, 12 parts pyrophyllite, 18 parts modified magnesium borate whiskers, 5 parts palygorskite, 2 parts calcium borate, 1.2 parts tricalcium silicate, and 0.5 parts ammonium fluoride. Comparative Example 2

[0094] The difference between Comparative Example 2 and Example 1 is that Comparative Example 2 does not contain wet-processed mica powder, but all other aspects are the same.

[0095] A glaze for preventing ceramic tile deformation comprises the following raw materials in parts by weight: 23.3 parts spodumene, 20 parts calcite, 18 parts bauxite, 12 parts pyrophyllite, 10 parts modified magnesium borate whiskers, 5 parts palygorskite, 2 parts calcium borate, 1.2 parts tricalcium silicate, and 0.5 parts ammonium fluoride. Comparative Example 3

[0096] The difference between Comparative Example 3 and Example 1 is that Comparative Example 3 uses an equal amount of wet-process mica powder to replace the modified magnesium borate whiskers, while everything else is the same.

[0097] A glaze for preventing ceramic tile deformation comprises the following raw materials in parts by weight: 23.3 parts spodumene, 20 parts calcite, 18 parts bauxite, 12 parts pyrophyllite, 18 parts wet-processed mica powder, 5 parts palygorskite, 2 parts calcium borate, 1.2 parts tricalcium silicate, and 0.5 parts ammonium fluoride. Comparative Example 4

[0098] The difference between Comparative Example 4 and Example 1 is that Comparative Example 4 does not contain modified magnesium borate whiskers, but they are otherwise the same.

[0099] A glaze for preventing ceramic tile deformation comprises the following raw materials in parts by weight: 23.3 parts spodumene, 20 parts calcite, 18 parts bauxite, 12 parts pyrophyllite, 8 parts wet-processed mica powder, 5 parts palygorskite, 2 parts calcium borate, 1.2 parts tricalcium silicate, and 0.5 parts ammonium fluoride. Comparative Example 5

[0100] The difference between Comparative Example 5 and Example 1 is that Comparative Example 5 uses other mica powders instead of the wet mica powder in Example 1, but everything else is the same.

[0101] A glaze for preventing ceramic tile deformation comprises the following raw materials in parts by weight: 23.3 parts spodumene, 20 parts calcite, 18 parts bauxite, 12 parts pyrophyllite, 10 parts modified magnesium borate whiskers, 8 parts mica powder, 5 parts palygorskite, 2 parts calcium borate, 1.2 parts tricalcium silicate, and 0.5 parts ammonium fluoride.

[0102] The mica powder was purchased from Xuyang Mining Co., Ltd., and the product model is mica powder 600 mesh with an average particle size of 600 mesh. Comparative Example 6

[0103] The difference between Comparative Example 6 and Example 1 is that Comparative Example 6 uses magnesium borate whiskers instead of modified magnesium borate whiskers, but everything else is the same. Comparative Example 7

[0104] The difference between Comparative Example 7 and Example 1 is that the preparation method of the modified magnesium borate whiskers in Comparative Example 7 is different from that in Example 1, but all other aspects are the same.

[0105] The method for preparing the modified magnesium borate whiskers includes the following steps:

[0106] (1) Magnesium borate whiskers and 3-methacryloxypropyltriethoxysilane were added to water and stirred at 500 rpm for 10 h to obtain a whisker dispersion; the mass ratio of magnesium borate whiskers, 3-methacryloxypropyltriethoxysilane and water was 1:0.05:10.

[0107] (2) Add 30% hydrogen peroxide by volume to the whisker dispersion, stir evenly, then add limestone powder, and stir at 500 rpm for 10 h to obtain the whisker precursor solution; the mass ratio of hydrogen peroxide, whisker dispersion and limestone powder is 0.05:1:0.2.

[0108] (3) Add single-walled carbon nanotubes to the whisker precursor solution, stir at 500 rpm for 12 h in a 60°C water bath, then sonicate at 600 W for 30 min in a 60°C water bath, and dry to obtain modified magnesium borate whiskers.

[0109] The mass ratio of the single-walled carbon nanotubes to the whisker precursor solution is 0.1:1. Comparative Example 8

[0110] The difference between Comparative Example 8 and Example 1 is that the preparation method of the modified magnesium borate whiskers in Comparative Example 8 is different from that in Example 1, but all other aspects are the same.

[0111] The method for preparing the modified magnesium borate whiskers includes the following steps:

[0112] (1) Magnesium borate whiskers and 3-methacryloxypropyltriethoxysilane were added to water and stirred at 500 rpm for 10 h to obtain a whisker dispersion; the mass ratio of magnesium borate whiskers, 3-methacryloxypropyltriethoxysilane and water was 1:0.05:10.

[0113] (2) Add 30% hydrogen peroxide by volume to the whisker dispersion and stir at 500 rpm for 10 h to obtain the whisker precursor solution; the mass ratio of hydrogen peroxide to whisker dispersion is 0.05:1.

[0114] (3) Disperse single-walled carbon nanotubes in deionized water, add dopamine hydrochloride, adjust the pH to 8.5 with Tris buffer, stir evenly, and dry to obtain polydopamine modified carbon nanotubes; the mass ratio of single-walled carbon nanotubes, dopamine hydrochloride and deionized water is 1:0.5:10.

[0115] (4) Add polydopamine-modified carbon nanotubes to the whisker precursor solution, stir at 500 rpm for 12 h in a 60°C water bath, then sonicate at 600 W for 30 min in a 60°C water bath, and dry to obtain modified magnesium borate whiskers.

[0116] The mass ratio of the polydopamine-modified carbon nanotubes to the whisker precursor solution is 0.1:1.

[0117] The magnesium borate whiskers were purchased from Chengdu Haoming Technology Development Co., Ltd., product model MBWK-1, with an aspect ratio of 10~20 and a bulk density of 0.3~0.4 g / cm³. 3 .

[0118] Test case

[0119] The glazes described in Examples 1-4 and Comparative Examples 1-8 were applied to the unglazed body using conventional methods, with the thickness of the glaze layer controlled at 1 mm. After the glaze layer dried, the ceramic tiles were rapidly fired in an oxidizing atmosphere at 1200°C for testing.

[0120] The flexural strength was tested using a flexural testing machine.

[0121] Table 1

[0122]

[0123] As can be seen from Table 1, the glaze described in this invention can effectively improve flexural strength and effectively prevent ceramic tile deformation.

[0124] Comparing Examples 1 to 4, it can be seen that Example 1 is the best implementation of the present invention, with the best flexural strength.

[0125] Comparing Example 1 with Comparative Examples 1 and 2, it can be seen that the present invention significantly improves the flexural strength by adding modified magnesium borate whiskers. It can also be seen from the comparison that if the system does not contain wet-process mica powder, the improvement in flexural strength is limited when the amount of modified magnesium borate whiskers added is too large. Without the addition of the wet-process mica powder, the flexural strength will decrease significantly.

[0126] Comparing Example 1 with Comparative Examples 3-4, it can be seen that the present invention significantly improves flexural strength by adding specific wet-process mica powder. Furthermore, the comparison shows that if modified magnesium borate whiskers are not added to the system, the improvement is limited when the amount of wet-process mica powder added is too large. The absence of the modified magnesium borate whiskers will lead to a significant decrease in flexural strength.

[0127] A comprehensive comparison of Example 1 and Comparative Examples 1-4 shows that, in this invention, the modified magnesium borate whiskers and wet-process mica powder have a significant synergistic effect in improving flexural strength. The absence of either one will lead to a significant decrease in performance.

[0128] Comparing Example 1 and Comparative Example 5, it can be seen that the wet-process mica powder of the present invention can further improve the flexural strength compared with other mica powders.

[0129] Comparing Example 1 with Comparative Examples 6-8, it can be seen that the present invention effectively improves the flexural strength by modifying magnesium borate whiskers. Moreover, the magnesium borate whiskers prepared by different modification methods have different effects on the improvement of flexural strength. The magnesium borate whiskers prepared by the modified magnesium borate whiskers described in the present invention can significantly improve the flexural strength compared with the modified magnesium borate whiskers prepared by other methods.

[0130] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical spirit of the present invention. The technical scope of the present invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A glaze for preventing deformation of a ceramic tile, characterized by, The preparation raw materials include the following parts by weight: 15-30 parts spodumene, 15-30 parts calcite, 12-20 parts bauxite, 8-15 parts pyrophyllite, 6-12 parts modified magnesium borate whiskers, 5-9 parts wet-process mica powder, 3-6 parts palygorskite, 1-2.5 parts calcium borate, 1-2 parts tricalcium silicate, and 0.2-0.7 parts ammonium fluoride; The bulk density of the wet-processed mica powder is 0.2~0.3 g / cm³. 3 The average particle size is 35~60μm, and the aspect ratio is 70~90; The modified magnesium borate whiskers are prepared by a method comprising the following steps: (1) Add magnesium borate whiskers and coupling agent to water and stir evenly to obtain whisker dispersion; (2) Add hydrogen peroxide dropwise to the whisker dispersion, stir evenly, then add limestone powder, stir evenly, and obtain whisker precursor solution; (3) Add polydopamine-modified carbon nanotubes to the whisker precursor solution, stir evenly in a water bath at 55~80℃, then sonicate in a water bath at 55~80℃, and dry to obtain modified magnesium borate whiskers.

2. The glaze for preventing deformation of a ceramic tile according to claim 1, characterized by, The preparation raw materials include the following parts by weight: 20-30 parts spodumene, 15-25 parts calcite, 15-20 parts bauxite, 10-15 parts pyrophyllite, 8-12 parts modified magnesium borate whiskers, 6-9 parts wet-process mica powder, 4-6 parts palygorskite, 1.5-2.5 parts calcium borate, 1-1.5 parts tricalcium silicate, and 0.4-0.7 parts ammonium fluoride.

3. The glaze for preventing ceramic tile deformation according to claim 1, characterized in that, The preparation raw materials include the following parts by weight: 23.3 parts spodumene, 20 parts calcite, 18 parts bauxite, 12 parts pyrophyllite, 10 parts modified magnesium borate whiskers, 8 parts wet-process mica powder, 5 parts palygorskite, 2 parts calcium borate, 1.2 parts tricalcium silicate, and 0.5 parts ammonium fluoride.

4. The glaze for preventing deformation of a ceramic tile according to claim 1, wherein The wet-process mica powder has a bulk density of 0.22-0.25 g / cm 3 , an average particle size of 38-52 μm, and an aspect ratio of 80.

5. The glaze for preventing deformation of a ceramic tile according to claim 1, wherein The mass ratio of the magnesium borate whiskers, coupling agent, and water is 1:(0.01~0.1):(4~20); and / or The mass ratio of hydrogen peroxide, whisker dispersion, and limestone powder is (0.01~0.1):1:(0.1~0.4); and / or The mass ratio of the polydopamine-modified carbon nanotubes to the whisker precursor solution is (0.05~0.2):

1.

6. The glaze for preventing deformation of a ceramic tile according to claim 1, wherein The coupling agent includes at least one of γ-methacryloxypropyltris(trimethylsiloxane), γ-methacryloxypropyltriisopropoxysilane, 3-methacryloxypropyltriethoxysilane, and 3-(methacryloxy)propylmethyldiethoxysilane.

7. The glaze for preventing deformation of a ceramic tile according to claim 1, wherein The preparation method of the polydopamine-modified carbon nanotubes includes the following steps: Single-walled carbon nanotubes were dispersed in deionized water, dopamine hydrochloride was added, and the pH was adjusted to 8.4-8.6 with Tris buffer. The mixture was stirred evenly and dried to obtain polydopamine-modified carbon nanotubes. The mass ratio of the single-walled carbon nanotubes to dopamine hydrochloride is 1:(0.2~0.8).

8. The glaze for preventing deformation of a ceramic tile according to claim 1, wherein The ultrasonic treatment has a power of 500~800W and a duration of 20~50min.

9. A ceramic tile comprising a body, a face glaze layer provided on the body, characterized in that, The surface glaze layer is prepared using the glaze as described in any one of claims 1 to 8.

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