Preparation process of anti-sticking ceramic pot glaze

Abstract

The invention relates to the technical field of ceramic pot glaze, in particular to a preparation process of anti-sticking ceramic pot glaze. The preparation process of the anti-sticking ceramic pot glaze comprises the following steps: modifying kaolin; preparing zinc-doped modified titanium dioxide; preparing ceramic pot glaze; and firing the ceramic pot glaze on the anti-sticking pot. The preparation method comprises the following steps: drying kaolin, carrying out ball milling, adding gluconic acid into kaolin powder, stirring, standing, carrying out suction filtration, washing with distilled water, drying filter residues, grinding and sieving to obtain gluconic acid modified kaolin, and gluconic acid has better stability and solubility in a high-temperature environment compared with citric acid; the prepared ceramic pot glaze can be more easily mixed with other components, citric acid is replaced with gluconic acid, the gluconic acid is more easily mixed with kaolin, the gluconic acid can complex metal ions and promote dissolution of the metal ions in the kaolin, sintering is facilitated, the firing temperature of the ceramic pot glaze is reduced, and the production cost of the ceramic pot glaze is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramic pot glazes, and specifically to a preparation process of an anti-stick ceramic pot glaze. Background Art

[0002] The main functions of an anti-stick pot are, on the one hand, to prevent food from sticking to the bottom of the pot during cooking, which may cause the food to burn or damage the appearance of the food, and on the other hand, to solve the problem of difficult cleaning after the food is burned. The anti-stick performance of the anti-stick pot is related to the surface anti-stick coating.

[0003] Existing non-stick pot products usually use ceramic pot glazes as non-stick coatings. Ceramic pot glazes have the advantages of being waterproof, smooth, shiny, easy to clean, and high-temperature resistant. Ceramic pot glazes are made of natural mineral materials and will not produce harmful substances after long-term use. However, the existing ceramic pot glazes require a relatively high sintering temperature and consume a large amount of energy, resulting in a relatively high production cost of ceramic pot glazes. Moreover, they do not have antibacterial functions, and if not cleaned properly or left for a long time, it will lead to the growth of bacteria.

[0004] Therefore, there is an urgent need to develop a preparation process of an anti-stick ceramic pot glaze to solve the problems of relatively high production cost of existing anti-stick pots and the lack of antibacterial functions. Summary of the Invention

[0005] In order to solve the above technical defects, the present invention has developed a preparation process of an anti-stick ceramic pot glaze, which includes the following steps:

[0006] S1: The modification of kaolin includes:

[0007] Dry the kaolin and then put it into a ball mill for ball milling. Place the kaolin in a beaker, add gluconic acid, stir with a glass rod and then let it stand, then carry out suction filtration, and then wash with distilled water. After removing the gluconic acid solution on the kaolin, place the filter residue in a drying oven for drying, and then grind and sieve to obtain gluconic acid-modified kaolin;

[0008] S2: The preparation of zinc-doped modified titanium dioxide includes:

[0009] Mix zinc nitrate hexahydrate with absolute ethanol and stir to fully dissolve it to obtain solution A. Mix absolute ethanol with tetrabutyl titanate and stir to fully dissolve it to obtain solution B. Slowly add solution A dropwise to solution B while stirring, and then add glacial acetic acid and stir to make it fully miscible to form a transparent sol. Seal the transparent sol and place it in a cool place for aging to obtain a gel. Place the gel in a constant temperature drying oven for drying, and then calcine it in a vacuum tube electric furnace to obtain zinc-doped modified titanium dioxide;

[0010] S3: The preparation of the ceramic pot glaze includes:

[0011] Mix gluconic acid modified kaolin, lithium carbonate, iron oxide, calcium oxide, zinc-doped modified titanium dioxide, barium oxide and boron oxide evenly, add calcium aluminosilicate as a sintering aid, and after grinding and sieving, the ceramic pot glaze is obtained.

[0012] S4: Firing the ceramic pot glaze on the non-stick pan includes:

[0013] Take the ceramic pot glaze and spray it evenly on the blank, put it into the furnace and fire it at high temperature to form, and after cooling, perform edge grinding treatment, then the non-stick pan coated with the ceramic pot glaze is obtained.

[0014] Further, the modification of kaolin in step S1 includes the following steps:

[0015] S1.1: Place kaolin in a vacuum oven at a temperature of 50 - 60 °C and dry it for 4 - 5 h, then put it into a ball mill for ball milling to obtain kaolin powder for standby.

[0016] S1.2: Add the kaolin powder obtained in step S1.1 to gluconic acid with a concentration of 1 - 3% according to the solid-liquid weight ratio of 1:(9 - 11), stir with a glass rod for 5 - 10 min, then let it stand for 20 - 30 min to obtain a mixture for standby.

[0017] S1.3: Filter the mixture obtained in step S1.2 to obtain filter residue, and then wash the filter residue with distilled water 3 - 5 times to obtain the washed filter residue.

[0018] S1.4: Place the washed filter residue in a drying oven and dry it for 6 - 8 h, then grind and sieve it to obtain gluconic acid modified kaolin.

[0019] Further, the preparation of zinc-doped modified titanium dioxide in step S2 includes the following steps:

[0020] S2.1: Mix zinc nitrate hexahydrate and absolute ethanol in a mass ratio of (1.5 - 2.3):1, stir until dissolved to obtain solution A for standby.

[0021] S2.2: Mix absolute ethanol and tetrabutyl titanate in a mass ratio of (1.5 - 2.5):1 and stir well to obtain solution B for standby.

[0022] S2.3: Dropwise add the solution A obtained in step S2.1 into the solution B obtained in step S2.2 while stirring, then add glacial acetic acid until the mass ratio of solution A, solution B and glacial acetic acid is (9 - 15):(5 - 7):1, then stir for 10 - 15 min to make them fully miscible to form a transparent sol, and seal the transparent sol and place it in a cool place for aging to obtain a gel for standby.

[0023] S2.4: Place the gel obtained in step S2.3 in a constant temperature drying oven and dry it at 90 - 110°C for 2 - 3 hours. Then, set the temperature in a vacuum tube furnace to 400 - 500°C and calcine for 50 - 60 minutes to obtain zinc-doped modified titanium dioxide.

[0024] Further, the preparation of the ceramic pot glaze in step S3 includes the following steps:

[0025] S3.1: Mix gluconic acid-modified kaolin, lithium carbonate, iron oxide, calcium oxide, zinc-doped modified titanium dioxide, barium oxide, and boron oxide evenly according to the mass ratio of (75 - 85):(3.5 - 4.5):1:(3.5 - 4.5):1:(2.5 - 3.5):1 to obtain a mixed material A for standby.

[0026] S3.2: Add calcium aluminosilicate to the mixed material A obtained in step S3.1 so that the mass ratio of the mixed material A to calcium aluminosilicate is (90 - 100):1, and put it into a ball mill for ball milling to obtain a mixed material B.

[0027] S3.3: Screen the mixed material B obtained in step S3.2 to remove impurities to obtain the ceramic pot glaze.

[0028] Further, step S4 of firing the ceramic pot glaze on the non-stick pan includes the following steps:

[0029] S4.1: Evenly spray the ceramic pot glaze on the metal pot blank through a spray gun, place it in a vacuum oven for drying, and set it aside for standby.

[0030] S4.2: Put the metal pot blank obtained in step S4.1 into a kiln for firing to form the shape.

[0031] S4.3: Use a grinding machine to grind the edge of the metal pot blank fired and formed in step S4.2 until the edge is smooth, thus obtaining the non-stick pan coated with the ceramic pot glaze.

[0032] Further, the temperature of the drying oven in step S1.4 is set to 90 - 110°C.

[0033] Further, the aging time in step S2.3 is 24 - 36 hours.

[0034] Further, the ball milling time in step S3.2 is 15 - 20 minutes.

[0035] Further, the drying temperature in step S4.1 is 50 - 60°C, and the drying time is 4 - 5 hours.

[0036] Further, the temperature in the kiln in step S4.2 is 1250 - 1300°C, and the firing time is 4 - 6 hours.

[0037] Compared with the prior art, the present invention has at least the following beneficial effects:

[0038] 1. By adding gluconic acid to kaolin powder to prepare gluconic acid-modified kaolin, gluconic acid has better stability than citric acid in a high-temperature environment and better solubility in water, and can be more easily mixed with other components. Therefore, by replacing citric acid with gluconic acid, gluconic acid can be more easily mixed with kaolin. Gluconic acid has organic groups that can complex various metal ions in minerals and has a certain acid dissolution effect, promoting the dissolution of aluminum, iron, and other cations in kaolin, facilitating sintering, achieving the purpose of reducing the firing temperature of the ceramic pot glaze, and thus reducing the production cost of the ceramic pot glaze.

[0039] 2. By mixing zinc nitrate hexahydrate with tetrabutyl titanate and glacial acetic acid for reaction to prepare zinc-doped modified titanium dioxide, zinc nitrate hexahydrate has better photocatalytic performance and lower cost than ferric nitrate nonahydrate. Zinc-doped modified titanium dioxide can more effectively absorb visible light and ultraviolet light under illumination, thereby improving the photocatalytic effect, and also endowing the non-stick ceramic pot glaze with a certain antibacterial function. By replacing ferric nitrate nonahydrate with zinc nitrate hexahydrate, the zinc-doped modified titanium dioxide greatly improves the utilization rate of visible light and the activity of the catalyst, further enhancing the antibacterial effect.

[0040] 3. By using gluconic acid-modified kaolin, lithium carbonate, iron oxide, calcium oxide, zinc-doped modified titanium dioxide, barium oxide, and boron oxide as the main components to prepare a ceramic pot glaze for the non-stick surface, among which, calcium oxide can significantly improve the hardness and wear resistance of the ceramic pot glaze. By adding the sintering aid calcium aluminosilicate during the ball milling process, the chemical stability of the ceramic pot glaze can be improved after firing, enabling it to have better corrosion resistance in corrosive environments such as acids and alkalis. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic flow chart of the preparation process of the ceramic pot glaze according to the embodiment of the present invention.

[0042] Figure 2 It is a tabular graph of the sintering temperature detection of the ceramic pot glaze according to the embodiment and comparative example of the present invention.

[0043] Figure 3 It is a tabular graph of the detection of the proportion of the bacterial coverage area of the ceramic pot glaze according to the embodiment and comparative example of the present invention.

[0044] Figure 4 It is a tabular graph of the detection of the acid corrosion strength loss rate of the ceramic pot glaze according to the embodiment and comparative example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] Example 1: A preparation method of a non-stick ceramic pot glaze, as Figure 1 shown, includes the following steps:

[0047] S1: The modification of kaolin includes:

[0048] S1.1: Place kaolin in a vacuum oven at 60 °C and dry it for 5 h, then put it into a ball mill for ball milling to obtain kaolin powder for standby;

[0049] S1.2: Add the kaolin powder obtained in step S1.1 to 2% concentration gluconic acid according to the solid-liquid weight ratio of 1:10, stir with a glass rod for 10 min, and then let it stand for 20 min to obtain a mixture for standby;

[0050] S1.3: Filter the mixture obtained in step S1.2 by suction, and then wash it 4 times with distilled water to remove the gluconic acid solution to obtain filter residue for standby;

[0051] S1.4: Place the filter residue obtained in step S1.3 in a drying oven at 100 °C and dry it for 8 h, then grind and sieve it to obtain gluconic acid-modified kaolin.

[0052] S2: The preparation of zinc-doped modified titanium dioxide includes:

[0053] S2.1: Mix zinc nitrate hexahydrate and absolute ethanol in a mass ratio of 1.8:1, stir to dissolve it completely to obtain solution A for standby;

[0054] S2.2: Mix absolute ethanol and tetrabutyl titanate in a mass ratio of 2:1, stir to dissolve it completely to prepare solution B for standby;

[0055] S2.3: Slowly add the solution A obtained in step S2.1 dropwise to the solution B obtained in step S2.2 while stirring, then add glacial acetic acid until the mass ratio of solution A, solution B and glacial acetic acid is 13:6:1, and then stir for 15 min to make them fully miscible to form a transparent sol. Seal the transparent sol and place it in a cool place for aging for 24 hours to obtain a gel for standby;

[0056] S2.4: Place the gel obtained in step S2.3 in a constant temperature drying oven and dry it at 100 °C for 3 h. Then, set the temperature in a vacuum tube furnace to 450 °C and calcine it for 60 min to obtain zinc-doped modified titanium dioxide.

[0057] S3: The preparation of the ceramic pot glaze includes:

[0058] S3.1: Mix gluconic acid-modified kaolin, lithium carbonate, iron oxide, calcium oxide, zinc-doped modified titanium dioxide, barium oxide, and boron oxide evenly according to a mass ratio of 80:4:1:4:1:3:1 to obtain a mixed material A for later use.

[0059] S3.2: Add calcium aluminosilicate to the mixed material A obtained in step S3.1 so that the mass ratio of the mixed material A to calcium aluminosilicate is 95:1. Put it into a ball mill and ball mill for 20 min to obtain a mixed material B.

[0060] S3.3: Screen the mixed material B obtained in step S3.2 to remove impurities to obtain the ceramic pot glaze.

[0061] S4: Firing the ceramic pot glaze on the non-stick pan includes:

[0062] S4.1: Spray the ceramic pot glaze evenly on the metal pot blank through a spray gun, place it in a 60 °C vacuum oven and dry it for 5 h, and then set it aside for later use.

[0063] S4.2: Put the metal pot blank obtained in step S4.1 into a kiln at a temperature of 1300 °C and fire it for 6 h to form the shape.

[0064] S4.3: Use a grinding machine to grind the edge of the metal pot blank fired and formed in step S4.2 until the edge is smooth, then the ceramic pot glaze can be fired on the non-stick pan.

[0065] Example 2: A preparation process of a non-stick pan ceramic pot glaze, as Figure 1 shown, includes the following steps:

[0066] S1: The modification of kaolin includes:

[0067] S1.1: Place the kaolin in a 60 °C vacuum oven and dry it for 5 h, then put it into a ball mill and ball mill to obtain kaolin powder for later use.

[0068] S1.2: Add 2% concentration of gluconic acid to the kaolin powder obtained in step S1.1 according to a solid-liquid weight ratio of 1:12, stir it with a glass rod for 10 min, and then let it stand for 20 min to obtain a mixture for later use.

[0069] S1.3: Perform suction filtration on the mixture obtained in step S1.2, then wash it 4 times with distilled water to remove the gluconic acid solution, and obtain the filter residue for standby.

[0070] S1.4: Place the filter residue obtained in step S1.3 in a drying oven at 100 °C and dry it for 8 h, then grind and sieve it to obtain gluconic acid-modified kaolin.

[0071] S2: The preparation of zinc-doped modified titanium dioxide includes:

[0072] S2.1: Mix zinc nitrate hexahydrate and absolute ethanol at a mass ratio of 2:1, stir to dissolve it completely, and obtain solution A for standby.

[0073] S2.2: Mix absolute ethanol and tetrabutyl titanate at a mass ratio of 2.5:1, stir to dissolve it completely, and prepare solution B for standby.

[0074] S2.3: Slowly add the solution A obtained in step S2.1 dropwise to the solution B obtained in step S2.2 while stirring, then add glacial acetic acid until the mass ratio of solution A, solution B, and glacial acetic acid is 15:7:1. Then stir for 15 min to make them fully miscible to form a transparent sol. Seal the transparent sol and place it in a cool place for aging for 24 h to obtain a gel for standby.

[0075] S2.4: Place the gel obtained in step S2.3 in a constant-temperature drying oven and dry it at 100 °C for 3 h. Then set the temperature in a vacuum tube furnace to 450 °C and calcine it for 60 min to obtain zinc-doped modified titanium dioxide.

[0076] S3: The preparation of the ceramic pot glaze includes:

[0077] S3.1: Mix the gluconic acid-modified kaolin, lithium carbonate, iron oxide, calcium oxide, zinc-doped modified titanium dioxide, barium oxide, and boron oxide evenly at a mass ratio of 85:5:2:4:1:4:2 to obtain a mixed material A for standby.

[0078] S3.2: Add calcium aluminosilicate to the mixed material A obtained in step S3.1 so that the mass ratio of the mixed material A to calcium aluminosilicate is 100:1. Put it into a ball mill and ball mill for 20 min to obtain a mixed material B.

[0079] S3.3: Sieve the mixed material B obtained in step S3.2 to screen out impurities and obtain the ceramic pot glaze.

[0080] S4: Firing the ceramic pot glaze on the non-stick pan includes:

[0081] S4.1: Evenly spray the ceramic pot glaze on the metal pot blank through a spray gun, place it in a vacuum oven at 60 °C and dry it for 5 h, then it is for standby.

[0082] S4.2: Put the metal pot blank obtained in step S4.1 into a kiln at a temperature of 1300 °C and fire it for 6 hours to complete the firing and forming.

[0083] S4.3: Use a grinding machine to grind the edge of the metal pot blank fired and formed in step S4.2 until the edge is smooth, and then the ceramic pot glaze can be fired on the non-stick pan.

[0084] Example 3: A preparation process of a non-stick ceramic pot glaze, as Figure 1 shown, includes the following steps:

[0085] S1: The modification of kaolin includes:

[0086] S1.1: Place kaolin in a vacuum oven at a temperature of 80 °C and dry it for 5 hours, then put it into a ball mill for ball milling to obtain kaolin powder for standby.

[0087] S1.2: Add the kaolin powder obtained in step S1.1 to 2% concentration gluconic acid according to the solid-liquid weight ratio of 1:10, stir with a glass rod for 20 minutes, and then let it stand for 15 minutes to obtain a mixture for standby.

[0088] S1.3: Filter the mixture obtained in step S1.2, and then wash it twice with distilled water to remove the gluconic acid solution to obtain filter residue for standby.

[0089] S1.4: Place the filter residue obtained in step S1.3 in a drying oven at 80 °C and dry it for 6 hours, then grind and sieve it to obtain gluconic acid-modified kaolin.

[0090] S2: The preparation of zinc-doped modified titanium dioxide includes:

[0091] S2.1: Mix zinc nitrate hexahydrate and absolute ethanol at a mass ratio of 1.8:1, stir to dissolve it completely to obtain solution A for standby.

[0092] S2.2: Mix absolute ethanol and tetrabutyl titanate at a mass ratio of 2:1, stir to dissolve it completely to prepare solution B for standby.

[0093] S2.3: Slowly add the solution A obtained in step S2.1 dropwise to the solution B obtained in step S2.2 while stirring, then add glacial acetic acid until the mass ratio of solution A, solution B and glacial acetic acid is 13:6:1, and then stir for 10 minutes to make them fully miscible to form a transparent sol. Seal the transparent sol and place it in a cool place for aging for 24 hours to obtain a gel for standby.

[0094] S2.4: Place the gel obtained in step S2.3 in a constant-temperature drying oven and dry it at 120 °C for 2 h. Then, set the temperature to 400 °C in a vacuum tube furnace and calcine it for 80 min to obtain zinc-doped modified titanium dioxide.

[0095] S3: The preparation of the ceramic pot glaze includes:

[0096] S3.1: Mix gluconic acid-modified kaolin, lithium carbonate, iron oxide, calcium oxide, zinc-doped modified titanium dioxide, barium oxide, and boron oxide evenly in a mass ratio of 80:4:1:4:1:3:1 to obtain a mixed material A for later use.

[0097] S3.2: Add calcium aluminosilicate to the mixed material A obtained in step S3.1 so that the mass ratio of the mixed material A to calcium aluminosilicate is 95:1. Put it into a ball mill and ball mill for 30 min to obtain a mixed material B.

[0098] S3.3: Sieve the mixed material B obtained in step S3.2 to screen out impurities to obtain the ceramic pot glaze.

[0099] S4: Firing the ceramic pot glaze on the non-stick pan includes:

[0100] S4.1: Evenly spray the ceramic pot glaze on the metal pot blank through a spray gun. After placing it in a vacuum oven at 80 °C and drying for 5 h, set it aside for later use.

[0101] S4.2: Put the metal pot blank obtained in step S4.1 into a kiln at 1200 °C and fire for 4 h to form the shape.

[0102] S4.3: Use a grinding machine to grind the edge of the metal pot blank formed in step S4.2 until the edge is smooth, then the ceramic pot glaze can be fired on the non-stick pan.

[0103] Comparative Example 1: Compared with Example 1, the difference in Comparative Example 1 is that the modification of kaolin in step S1 is removed, and the other steps remain unchanged, denoted as Comparative Example 1.

[0104] Record the sintering temperature of the non-stick pan ceramic glazes prepared in Examples 1-3 and Comparative Example 1. By setting different temperatures to fire the ceramic pot glaze, obtain the most suitable sintering temperature of the ceramic pot glaze of the present invention and record it. Refer to Figure 2 , it can be seen that the sintering temperature of the examples is lower than that of the comparative examples. This shows that using gluconic acid-modified kaolin as the main component of the ceramic pot glaze has a lower sintering temperature compared to citric acid-modified kaolin, which can reduce energy consumption and thus reduce the production cost of the ceramic pot glaze.

[0105] Comparative Example 2: Compared with Example 1, the difference in Comparative Example 2 is that zinc nitrate hexahydrate in the preparation of zinc-doped modified titanium dioxide in step S2 is changed to ferric nitrate nonahydrate, and the remaining steps remain unchanged, denoted as Comparative Example 2.

[0106] Take test pieces of the non-stick ceramic pot glaze prepared in Examples 1-3 and Comparative Example 2. After incubating and diluting the strains, apply an equal volume of the bacterial culture on the agar plate, and place ceramic pot glaze test pieces of almost the same size at an appropriate distance on each plate. All ceramic pot glaze test pieces are cultured under weak ultraviolet light at 37 °C for 24 h with the ultraviolet light 15 cm away from the culture medium, and the corresponding ceramic pot glaze test pieces of the comparative example are used as the control. Finally, check with a microscope to determine the proportion of the bacterial coverage area, and then obtain the antibacterial effects of Examples 1-3 and Comparative Examples 1-3. Refer to Figure 3 , it can be seen that the proportion of the bacterial coverage area in the examples is lower than that in the comparative examples, indicating that the ceramic pot glaze prepared with zinc-doped modified titanium dioxide as the main component has better antibacterial performance than that with iron-doped modified titanium dioxide.

[0107] Comparative Example 3: Compared with Example 1, the difference in Comparative Example 3 is that the operation of adding calcium aluminosilicate in step S3.2 is removed, and the remaining steps remain unchanged, denoted as Comparative Example 3.

[0108] Test the acid and alkali corrosion resistance of the non-stick ceramic pot glaze prepared in Examples 1-3 and Comparative Example 3 according to GB / T 1970-1996 "Test Method for Acid and Alkali Corrosion Resistance of Porous Ceramics". Take the ceramic pot glaze specimens, place the specimens in 20% sulfuric acid solution and 1% sodium hydroxide solution respectively and boil for 1 h, then test the flexural strength, and calculate the percentage reduction rate of the flexural strength. Refer to Figure 4 , it can be seen that the loss rate of the acid and alkali corrosion strength in the examples is lower than that in the comparative examples, indicating that by adding calcium aluminosilicate as a sintering aid, the corrosion resistance of the ceramic pot glaze in corrosive environments such as acid and alkali can be effectively improved.

[0109] The above examples only illustratively explain the principles and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify or change the above examples without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A preparation process of a non-stick ceramic pot glaze, characterized in that, It includes the following steps: S1: The modification of kaolin includes: Dry the kaolin and then put it into a ball mill for ball milling. Place the kaolin in a beaker, add gluconic acid, stir with a glass rod and then let it stand. Subsequently, perform suction filtration, then wash the filter residue with distilled water, and place the washed filter residue in a drying oven for drying. After that, grind and sieve it to obtain gluconic acid-modified kaolin; S2: The preparation of zinc-doped modified titanium dioxide includes: Mix zinc nitrate hexahydrate with absolute ethanol and stir to dissolve it completely to obtain solution A. Mix absolute ethanol with tetrabutyl titanate and stir to dissolve it completely to obtain solution B. Slowly add solution A dropwise to solution B while stirring, and then add glacial acetic acid. Stir to make them fully miscible to form a transparent sol. Seal the transparent sol and place it in a cool place for aging to obtain a gel. Place the gel in a constant-temperature drying oven for drying, and then calcine it in a vacuum tube furnace to obtain zinc-doped modified titanium dioxide; S3: The preparation of the ceramic pot glaze includes: Mix the gluconic acid-modified kaolin, lithium carbonate, iron oxide, calcium oxide, zinc-doped modified titanium dioxide, barium oxide, and boron oxide evenly, add calcium aluminosilicate as a sintering aid, grind and sieve it, and then the ceramic pot glaze is obtained; S4: Firing the ceramic pot glaze on the non-stick pan includes: Take the ceramic pot glaze and spray it evenly on the blank, put it into a furnace for high-temperature firing and shaping, and perform edge grinding after cooling to obtain a non-stick pan coated with the ceramic pot glaze.

2. The preparation process of the non-stick ceramic pot glaze according to claim 1, characterized in that, The modification of kaolin in step S1 includes the following steps: S1.1: Place the kaolin in a vacuum oven at a temperature of 50 - 60 °C and dry it for 4 - 5 h, then put it into a ball mill for ball milling to obtain kaolin powder for later use; S1.2: Add gluconic acid with a concentration of 1 - 3% to the kaolin powder obtained in step S1.1 according to the solid-liquid weight ratio of 1:(9 - 11), stir with a glass rod for 5 - 10 min, and then let it stand for 20 - 30 min to obtain a mixture for later use; S1.3: Perform suction filtration on the mixture obtained in step S1.2 to obtain a filter residue, and then wash the filter residue 3 - 5 times with distilled water to obtain the washed filter residue; S1.4: Place the washed filter residue in a drying oven for drying for 6 - 8 h, then grind and sieve it to obtain gluconic acid-modified kaolin.

3. The preparation process of the non-stick ceramic pot glaze according to claim 2, characterized in that, The preparation of zinc-doped modified titanium dioxide in step S2 includes the following steps: S2.1: Mix zinc nitrate hexahydrate with absolute ethanol according to the mass ratio of (1.5 - 2.3):1, stir until dissolved to obtain solution A for later use; S2.2: Mix absolute ethanol with tetrabutyl titanate according to the mass ratio of (1.5 - 2.5):1 and stir thoroughly to prepare solution B for later use; S2.3: Slowly add the solution A obtained in step S2.1 dropwise to the solution B obtained in step S2.2 while stirring, and then add glacial acetic acid until the mass ratio of solution A, solution B, and glacial acetic acid is (9 - 15):(5 - 7):

1. Then stir for 10 - 15 min to make them fully miscible to form a transparent sol. Seal the transparent sol and place it in a cool place for aging to obtain a gel for later use; S2.4: Place the gel obtained in step S2.3 in a constant-temperature drying oven and dry it at 90 - 110°C for 2 - 3 h. Then, set the temperature in a vacuum tube electric furnace to 400 - 500°C and calcine for 50 - 60 min to obtain zinc-doped modified titanium dioxide.

4. The preparation process of the non-stick ceramic pot glaze according to claim 3, characterized in that, Step S3 for preparing the ceramic pot glaze includes the following steps: S3.1: Mix gluconic acid-modified kaolin, lithium carbonate, iron oxide, calcium oxide, zinc-doped modified titanium dioxide, barium oxide, and boron oxide evenly according to the mass ratio of (75 - 85):(3.5 - 4.5):1:(3.5 - 4.5):1:(2.5 - 3.5):1 to obtain a mixed material A for standby. S3.2: Add calcium aluminosilicate to the mixed material A obtained in step S3.1 so that the mass ratio of the mixed material A to calcium aluminosilicate is (90 - 100):1, and put it into a ball mill for ball milling to obtain a mixed material B. S3.3: Screen the mixed material B obtained in step S3.2 to remove impurities to obtain the ceramic pot glaze.

5. The preparation process of the non-stick ceramic pot glaze according to claim 4, characterized in that, Step S4 for firing the ceramic pot glaze on the non-stick pot includes the following steps: S4.1: Spray the ceramic pot glaze evenly on the metal pot blank through a spray gun, and place it in a vacuum oven for drying and standby. S4.2: Put the metal pot blank obtained in step S4.1 into a kiln for firing to form a shape. S4.3: Use a grinding machine to grind the edge of the metal pot blank fired and formed in step S4.2 until the edge is smooth, thus obtaining a non-stick pot coated with the ceramic pot glaze.

6. The preparation process of the non-stick ceramic pot glaze according to claim 2, characterized in that, In step S1.4, the temperature of the drying oven is set to 90 - 110°C.

7. The preparation process of the non-stick ceramic pot glaze according to claim 3, characterized in that, In step S2.3, the aging time is 24 - 36 h.

8. The preparation process of the non-stick ceramic pot glaze according to claim 4, characterized in that, In step S3.2, the ball milling time is 15 - 20 min.

9. The preparation process of the non-stick ceramic pot glaze according to claim 5, characterized in that, In step S4.1, the drying temperature is 50 - 60°C and the drying time is 4 - 5 h.

10. The preparation process of the non-stick ceramic pot glaze according to claim 5, characterized in that, In step S4.2, the temperature in the kiln is 1250 - 1300°C and the firing time is 4 - 6 h.

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