Composite high-temperature-resistant ceramic glaze and preparation method thereof

Abstract

The composite high-temperature-resistant ceramic glaze is prepared from the following components in parts by weight: 20 to 30 parts of kaolin, 20 to 30 parts of potassium feldspar, 15 to 20 parts of aluminum hydroxide, 10 to 20 parts of precursor suspension, 15 to 20 parts of modified magnesium aluminate spinel solution and 100 to 120 parts of water. According to the composite high-temperature-resistant ceramic glaze and the preparation method thereof disclosed by the invention, the prepared glaze has excellent mechanical strength and good high-temperature resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramics, and particularly relates to a composite high-temperature resistant ceramic glaze and a preparation method thereof. Background Art

[0002] Ceramic products have the strength of metals, rich decorative effects, good wear resistance, and chemical stability, and are widely used in people's daily lives and are deeply loved by people. With the development of the economy and the improvement of people's living standards, people's performance requirements for daily-use ceramics are constantly increasing. Not only are the products required to be beautiful, but also have better mechanical properties. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a composite high-temperature resistant ceramic glaze and a preparation method thereof, and the obtained glaze has excellent mechanical strength and good high-temperature resistance.

[0004] In order to achieve the above purpose, the present invention provides the following technical solutions: A composite high-temperature resistant ceramic glaze, comprising the following components in parts by weight: 20-30 parts of kaolin, 20-30 parts of potassium feldspar, 15-20 parts of aluminum hydroxide, 10-20 parts of a precursor suspension, 15-20 parts of a modified magnesium aluminate spinel solution, and 100-120 parts of water.

[0005] A preparation method of a composite high-temperature resistant ceramic glaze, comprising the following steps: Mix kaolin, potassium feldspar, aluminum hydroxide, the precursor suspension, the modified magnesium aluminate spinel solution and water by stirring. After mixing evenly, ball mill into a glaze slurry to obtain the composite high-temperature resistant ceramic glaze.

[0006] Preferably, the preparation method of the precursor suspension includes: S11: Prepare a modified silica solution; S12: Mix silk fibroin, carbon nanotubes and water to obtain a mixed solution, adjust the pH of the mixed solution to 5-6, and add the modified silica solution to obtain the precursor suspension.

[0007] Preferably, the preparation method of the modified silica solution is specifically: mix silica, polyvinyl alcohol, glutaraldehyde and a hydrochloric acid solution with a volume fraction of 25%, and stir for 30-40 min to obtain the modified silica solution.

[0008] Preferably, the weight ratio of silica, polyvinyl alcohol, glutaraldehyde and the hydrochloric acid solution is 1:2:2:8.

[0009] Preferably, the preparation method of the modified magnesium aluminate spinel solution includes: After subjecting magnesium aluminate spinel to thermal expansion and cutting treatment, it is mixed with a binder and water to obtain a modified magnesium aluminate spinel solution.

[0010] Preferably, the binder includes silk fibroin and polyvinyl alcohol.

[0011] Preferably, the weight ratio of silk fibroin to polyvinyl alcohol is 1:5.

[0012] Preferably, the temperature of the thermal expansion treatment is 350 - 400 °C, and the heat preservation time is 8 - 12 min.

[0013] Preferably, the speed of the cutting treatment is 10000 - 14000 r / pm, and the cutting treatment time is 1 - 2 h.

[0014] In the present invention, a mixed solution of silk fibroin and carbon nanotubes is prepared. The amino acid residues in silk fibroin interact with carbon nanotubes through π-π bonds, enabling the carbon nanotubes to be uniformly dispersed in water and have a certain stability. Thus, the modified silica is cross-linked and dispersed on the network composed of carbon nanotubes and silk fibroin to form a cross-linked composite molecular network structure, increasing the cross-linked liquid-phase interface area. On the other hand, through thermal expansion and cutting treatment in the modified magnesium aluminate spinel solution, the mixture material components are placed between layers, providing an interlayer channel for the cross-linking of the mixture components. Then, by further interacting with silk fibroin, the self-assembly ability between components is improved, filling and cross-linking to form a dense network structure to enhance the mechanical properties of the glaze. Detailed implementation mode

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention. Additionally, it should be specifically noted that the raw materials and equipment of the present invention can all be obtained commercially and will not be listed one by one. Example 1

[0016] A composite high-temperature resistant ceramic glaze includes the following components in parts by weight: 20 parts of kaolin, 20 parts of potassium feldspar, 15 parts of aluminum hydroxide, 10 parts of precursor suspension, 15 parts of modified magnesium aluminate spinel solution, and 100 parts of water.

[0017] A preparation method of a composite high-temperature resistant ceramic glaze includes the following steps: Mix the above-mentioned parts by weight of kaolin, potassium feldspar, aluminum hydroxide, precursor suspension, modified magnesium aluminate spinel solution, and water by stirring. After mixing evenly, grind it into a glaze slurry to obtain the composite high-temperature resistant ceramic glaze.

[0018] Among them, the preparation method of the precursor suspension includes: S11: Prepare a modified silica solution: Mix silica, polyvinyl alcohol, glutaraldehyde, and a hydrochloric acid solution with a volume fraction of 25% in a weight ratio of 1:2:2:8, and stir for 30 minutes to obtain a modified silica solution; S12: Mix silk fibroin, carbon nanotubes, and water in a weight ratio of 1:1:4 to obtain a mixed solution. Adjust the pH of the mixed solution to 5, and add the modified silica solution to obtain a precursor suspension, where the weight ratio of the mixed solution to the modified silica solution is 1:1.

[0019] Among them, the preparation method of the modified magnesium aluminate spinel solution includes: After performing thermal expansion and cutting treatments on magnesium aluminate spinel, mix it with a binder and water in a weight ratio of 1:1:5 to obtain a modified magnesium aluminate spinel solution. Among them, the binder includes silk fibroin and polyvinyl alcohol in a weight ratio of 1:5. The temperature of the thermal expansion treatment is 350 °C, the holding time is 8 minutes, the speed of the cutting treatment is 10000 r / pm, and the time of the cutting treatment is 1 hour. Example 2

[0020] A composite high-temperature resistant ceramic glaze includes the following components in parts by weight: 30 parts of kaolin, 30 parts of potassium feldspar, 20 parts of aluminum hydroxide, 20 parts of precursor suspension, 20 parts of modified magnesium aluminate spinel solution, and 120 parts of water.

[0021] A preparation method of a composite high-temperature resistant ceramic glaze includes the following steps: Mix the above-mentioned parts by weight of kaolin, potassium feldspar, aluminum hydroxide, precursor suspension, modified magnesium aluminate spinel solution, and water, and after mixing evenly, ball mill it into a glaze slurry to obtain the composite high-temperature resistant ceramic glaze.

[0022] Among them, the preparation method of the precursor suspension includes: S11: Prepare a modified silica solution: Mix silica, polyvinyl alcohol, glutaraldehyde, and a hydrochloric acid solution with a volume fraction of 25% in a weight ratio of 1:2:2:8, and stir for 40 minutes to obtain a modified silica solution; S12: Mix silk fibroin, carbon nanotubes, and water in a weight ratio of 1:1:4 to obtain a mixed solution. Adjust the pH of the mixed solution to 6, and add the modified silica solution to obtain a precursor suspension, where the weight ratio of the mixed solution to the modified silica solution is 1:1.

[0023] Among them, the preparation method of the modified magnesium aluminate spinel solution includes: After the magnesia-alumina spinel is subjected to thermal expansion and cutting treatment, it is mixed with a binder and water in a weight ratio of 1:1:5 to obtain a modified magnesia-alumina spinel solution. Among them, the binder includes silk fibroin and polyvinyl alcohol in a weight ratio of 1:5. The temperature of the thermal expansion treatment is 400 °C, the heat preservation time is 12 min, the cutting speed is 14,000 r / pm, and the cutting time is 2 h. Example 3

[0024] A composite high-temperature resistant ceramic glaze includes the following components in parts by weight: 25 parts of kaolin, 25 parts of potassium feldspar, 18 parts of aluminum hydroxide, 15 parts of precursor suspension, 18 parts of modified magnesia-alumina spinel solution, and 110 parts of water.

[0025] A preparation method of a composite high-temperature resistant ceramic glaze includes the following steps: Mix the above-mentioned parts by weight of kaolin, potassium feldspar, aluminum hydroxide, precursor suspension, modified magnesia-alumina spinel solution, and water by stirring. After mixing evenly, ball mill it into a glaze slurry to obtain the composite high-temperature resistant ceramic glaze.

[0026] Among them, the preparation method of the precursor suspension includes: S11: Prepare a modified silica solution: Mix silica, polyvinyl alcohol, glutaraldehyde, and a hydrochloric acid solution with a volume fraction of 25% in a weight ratio of 1:2:2:8, and stir for 35 min to obtain a modified silica solution; S12: Mix silk fibroin, carbon nanotubes, and water in a weight ratio of 1:1:4 to obtain a mixed solution. Adjust the pH of the mixed solution to 6, and add the modified silica solution to obtain a precursor suspension, where the weight ratio of the mixed solution to the modified silica solution is 1:1.

[0027] Among them, the preparation method of the modified magnesia-alumina spinel solution includes: After the magnesia-alumina spinel is subjected to thermal expansion and cutting treatment, it is mixed with a binder and water in a weight ratio of 1:1:5 to obtain a modified magnesia-alumina spinel solution. Among them, the binder includes silk fibroin and polyvinyl alcohol in a weight ratio of 1:5. The temperature of the thermal expansion treatment is 380 °C, the heat preservation time is 10 min, the cutting speed is 12,000 r / pm, and the cutting time is 1.5 h. Comparative Example 1

[0028] Comparative Example 1 has basically the same components as Example 1. The difference is that magnesia-alumina spinel is directly used. Specifically: A composite high-temperature resistant ceramic glaze includes the following components in parts by weight: 20 parts of kaolin, 20 parts of potassium feldspar, 15 parts of aluminum hydroxide, 10 parts of precursor suspension, 15 parts of magnesia-alumina spinel, and 100 parts of water.

[0029] A preparation method of a composite high-temperature resistant ceramic glaze, comprising the following steps: Mix the above-mentioned parts by weight of kaolin, potassium feldspar, aluminum hydroxide, precursor suspension, magnesium aluminate spinel and water by stirring. After mixing evenly, ball mill into a glaze slurry to obtain the composite high-temperature resistant ceramic glaze.

[0030] Among them, the preparation method of the precursor suspension includes: S11: Prepare a modified silica solution: Mix silica, polyvinyl alcohol, glutaraldehyde and a hydrochloric acid solution with a volume fraction of 25% according to a weight ratio of 1:2:2:8, and stir for 30 min to obtain a modified silica solution; S12: Mix silk fibroin, carbon nanotubes and water according to a weight ratio of 1:1:4 to obtain a mixed solution. Adjust the pH of the mixed solution to 5, and add the modified silica solution to obtain a precursor suspension, wherein the weight ratio of the mixed solution to the modified silica solution is 1:1. Comparative Example 2

[0031] Comparative Example 2 has basically the same components as Example 1, except that magnesium aluminate spinel is directly used and the precursor suspension is not used. Specifically: A composite high-temperature resistant ceramic glaze, comprising the following components in parts by weight: 20 parts of kaolin, 20 parts of potassium feldspar, 15 parts of aluminum hydroxide, 15 parts of magnesium aluminate spinel and 100 parts of water.

[0032] A preparation method of a composite high-temperature resistant ceramic glaze, comprising the following steps: Mix the above-mentioned parts by weight of kaolin, potassium feldspar, aluminum hydroxide, magnesium aluminate spinel and water by stirring. After mixing evenly, ball mill into a glaze slurry to obtain the composite high-temperature resistant ceramic glaze.

[0033] For the glazes obtained in Examples 1-3 and Comparative Examples 1 and 2 of the present invention, ceramic blanks are prepared through the technological steps of forming, drying, biscuit firing, glazing, loading into the kiln, and firing, and performance tests are carried out. The test results are shown in Table 1. Among them, the commercially available ordinary ceramic products are purchased from Shenzhen Suhui Ceramics Co., Ltd.

[0034] Mechanical strength test: Conduct the test in accordance with GB / T 4740-1999.

[0035] Linear thermal expansion coefficient of the ceramic: Test in accordance with GBT16535-1996.

[0036] Table 1 Test data of Examples 1-3 and Comparative Example 1 and commercially available ceramics

[0037] As can be seen from the above table, the ceramics obtained from the glazes of Examples 1-3 have good compressive strength and fracture toughness, and also have good high-temperature resistance.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A composite high temperature resistant ceramic glaze, characterized in that: The invention comprises the following components in parts by weight: 20-30 parts of kaolin, 20-30 parts of potassium feldspar, 15-20 parts of aluminum hydroxide, 10-20 parts of precursor suspension, 15-20 parts of modified magnesium aluminum spinel solution and 100-120 parts of water.

2. A method for preparing the composite high temperature resistant ceramic glaze according to claim 1, characterized in that: The following steps are involved: Kaolin, potassium feldspar, aluminum hydroxide, precursor suspension, modified magnesium aluminum spinel solution and water are stirred and mixed, and after being evenly mixed, ball-milled into glaze slurry to obtain a composite high-temperature resistant ceramic glaze.

3. The method for preparing the composite high temperature resistant ceramic glaze according to claim 2, characterized in that: The preparation method of the precursor suspension comprises: S11: preparing modified silicon dioxide solution; S12: Mix silk fibroin, carbon nanotubes and water to obtain a mixed solution, adjust the pH of the mixed solution to 5-6, and add modified silica solution to obtain a precursor suspension.

4. The composite high temperature resistant ceramic glaze according to claim 3, characterized in that: The preparation method of the modified silicon dioxide solution is specifically as follows: silicon dioxide, polyvinyl alcohol, glutaraldehyde and a hydrochloric acid solution with a volume fraction of 25% are mixed, and stirred for 30-40 minutes to obtain the modified silicon dioxide solution.

5. The composite high temperature resistant ceramic glaze according to claim 4, characterized in that: The weight ratio of the silicon dioxide, polyvinyl alcohol, glutaraldehyde and hydrochloric acid solution is 1:2:2:

8.

6. The method for preparing the composite high temperature resistant ceramic glaze according to claim 2, characterized in that: The preparation method of the modified magnesium aluminum spinel solution comprises: After the magnesium-aluminum spinel is subjected to thermal expansion and cutting treatment, it is mixed with a binder and water to obtain a modified magnesium-aluminum spinel solution.

7. The composite high temperature resistant ceramic glaze according to claim 6, characterized in that: The binder includes silk fibroin and polyvinyl alcohol.

8. The method for preparing the composite high temperature resistant ceramic glaze according to claim 7, characterized in that: The weight ratio of the silk fibroin to polyvinyl alcohol is 1:

5.

9. The method for preparing the composite high temperature resistant ceramic glaze according to claim 6, characterized in that: The temperature of the thermal expansion treatment is 350-400° C., and the insulation time is 8-12 minutes.

10. The method for preparing the composite high temperature resistant ceramic glaze according to claim 6, characterized in that: The cutting process speed is 10000-14000 r / pm, and the cutting process time is 1-2 hours.

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