Preparation method of lithium-fluorite heat-resistant primary pottery cooking ware

Abstract

This invention relates to the field of ceramic cooking utensil technology, specifically to a method for preparing a spodumene-based heat-resistant ceramic cooking utensil, comprising the following steps: weighing raw materials according to the following weight parts: 40-45 parts spodumene, 15-19 parts Guangxi white clay, 15-17 parts Guizhou clay-based additives, 14-16 parts lithium clay ore, 8-12 parts modified quartz agent, and 1-3 parts bentonite. The ceramic cooking utensil of this invention uses spodumene in combination with Guangxi white clay, lithium clay ore, and bentonite, while also incorporating Guizhou clay-based additives and modified quartz agent. Through the harmonious blending of these raw materials, a synergistic effect is achieved, resulting in a ceramic cooking utensil with excellent fracture toughness, wear resistance, and easy cleaning properties. Furthermore, the product exhibits excellent thermal shock resistance, as well as significant resistance to temperature changes and corrosion stability.

Description

Technical Field

[0001] This invention relates to the field of ceramic cooking utensil technology, specifically to a method for preparing a spodumene heat-resistant ceramic cooking utensil. Background Technology

[0002] Original ceramic cookware occupies an important position in the kitchenware field due to its characteristics such as even heating and preservation of food flavor. However, in order to optimize the fracture toughness of existing original ceramic cookware, the wear resistance and ease of cleaning are easily reduced. At the same time, the thermal shock cycle performance of the products is poor, resulting in poor overall product coordination, as well as poor resistance to temperature changes and corrosion, which limits the efficiency of product use. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the purpose of this invention is to provide a method for preparing a spodumene heat-resistant ceramic cookware, so as to solve the problems mentioned in the background art.

[0004] The present invention solves the technical problem by adopting the following technical solution:

[0005] This invention provides a method for preparing a spodumene heat-resistant ceramic cookware, comprising the following steps:

[0006] Step 1: Weigh the raw materials according to their weight proportions:

[0007] 40-45 parts spodumene, 15-19 parts Guangxi white clay, 15-17 parts Guizhou clay-based admixture, 14-16 parts lithium clay ore, 8-12 parts modified quartz agent, and 1-3 parts bentonite.

[0008] Step 2: Wet ball milling of the raw materials from Step 1 at a speed of 1000-1500 r / min for 2 hours to obtain ball milling material. The ball milling material is then fed into a mold for molding. After molding, it is dried at room temperature until the surface moisture content of the blank is less than 5%. Finally, it is fired to obtain spodumene heat-resistant ceramic cookware.

[0009] Preferably, the firing temperature of the firing treatment is 1285-1295℃, and the firing time is 15-17h; the molding pressure of the molding treatment in the mold is 10-15MPa, and the molding time is 2h.

[0010] Preferably, the preparation method of the admixture based on Guizhou clay is as follows:

[0011] S11: Guizhou clay is first stirred thoroughly in a sufficient amount of potassium permanganate solution with a mass fraction of 12-15%, then washed with water, filtered, and dried. The dried Guizhou clay is then heat-homogenized to obtain heat-homogenized Guizhou clay.

[0012] S12: Preparation of the blending solution:

[0013] S12a: 5-8 parts by weight of 13X zeolite molecular sieve, 4-7 parts by weight of nano alumina and 3-5 parts by weight of boron nitride are blended and sintered for 1 hour at a sintering temperature of 350-370℃. After sintering, the sintered modified body is obtained.

[0014] S12b: β-cyclodextrin, sodium citrate solution and silane coupling agent KH550 are mixed evenly in a weight ratio of (3-5):(7-9):2 to obtain a compound solution; the sintered modified body and the compound solution are mixed evenly in a weight ratio of (4-7):11 to obtain a blended solution;

[0015] S13: Heat-homogenized Guizhou clay and admixture are mixed at a weight ratio of 7:(11-15). After mixing, an admixture based on Guizhou clay is obtained.

[0016] S14: The admixture and additive based on Guizhou clay were mixed and ball-milled at a weight ratio of (9-11):5. The ball milling speed was 1000-1500 r / min and the ball milling time was 2 h. After the ball milling was completed, the mixture was filtered and dried to obtain the admixture based on Guizhou clay.

[0017] Preferably, the stirring speed is 750-850 r / min, and the stirring time is 1 h; the mass fraction of the sodium citrate solution is 8-12%.

[0018] The specific steps for heat homogenization are as follows:

[0019] First, heat-treat at 210-230℃ for 1 hour, then raise the temperature to 350℃ at a rate of 2-4℃ / min and hold for 15-20 minutes, and finally lower the temperature to 55℃ at a rate of 1-3℃ / min and hold.

[0020] Preferably, the preparation method of the additive is as follows:

[0021] S101: Halloysite nanotubes, calcined talc and nano-magnesium oxide are composited and heat-treated at a weight ratio of 3:2:2. The heat treatment temperature is 210-220℃ for 10 min, and then naturally cooled to room temperature to obtain the composite.

[0022] S102: Mix the composite, sodium silicate solution and carboxymethyl cellulose evenly according to the weight ratio (5-7):(7-11):2 to obtain the additive solution;

[0023] Basalt fiber and additive solution were ultrasonically treated at a weight ratio of 4:7. After ultrasonic treatment, the mixture was filtered and dried to obtain the additive.

[0024] Preferably, the sodium silicate solution has a mass fraction of 4-7%; the ultrasonic power for ultrasonic treatment is 350-400W, and the ultrasonic treatment lasts for 1 hour.

[0025] Preferably, the modified quartz agent is prepared by:

[0026] S111: Silicon nitride, aluminum borate whiskers and sodium dodecylbenzenesulfonate solution are mixed evenly in a weight ratio of (2-3):(3-4):7 to obtain a modified solution;

[0027] Quartz was stirred and modified in a modification solution of 4-7 times its total volume. After stirring, the quartz modification solution was obtained.

[0028] S112: Quartz modification liquid and additives are mixed at a weight ratio of (7-11):5 and ball-milled at a speed of 1000-1500 r / min for 2 hours. After ball milling, the mixture is filtered and dried to obtain modified quartz agent.

[0029] Preferably, the sodium dodecylbenzenesulfonate solution has a mass fraction of 8-12%; the stirring speed for the stirring modification treatment is 300-350 r / min, and the stirring time is 2 h.

[0030] Preferably, the additive is prepared by uniformly mixing silicon carbide, lanthanum nitrate solution and montmorillonite in a weight ratio of (3-5):7:(2-3).

[0031] Preferably, the lanthanum nitrate solution has a mass fraction of 2-5%.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The original ceramic cooking utensil of this invention uses spodumene combined with Guangxi white clay, lithium clay ore and bentonite, and is also blended with additives and modified quartz agents based on Guizhou clay. Through the blending and synergistic effect of the raw materials, the original ceramic cooking utensil has fracture toughness, wear resistance and easy cleaning. At the same time, the product has excellent thermal shock cycle performance, and the product has significant temperature change resistance and corrosion stability.

[0034] 2. The admixture based on Guizhou clay is made by activating and improving Guizhou clay with potassium permanganate solution, followed by heat homogenization treatment. The heat homogenization is carried out by heat treatment at 10-230℃ for 1 hour, then heating to 350℃ at a rate of 2-4℃ / min and holding for 15-20 minutes, and finally cooling to 55℃ at a rate of 1-3℃ / min. Through continuous heat improvement and heat regulation, the activity of clay is optimized. At the same time, the admixture is further improved by stirring. The 3X zeolite molecular sieve, nano alumina and boron nitride in the admixture are sintered and improved. The compounded admixture is then blended. The β-cyclodextrin, sodium citrate solution and silane coupling agent KH550 in the compounded admixture work together to coordinate and improve the performance of the product. Through the co-mixing and synergistic improvement of the raw materials, the resulting admixture has a 13X zeolite molecular sieve-nano alumina-boron nitride matrix system, which coordinates and combines with Guizhou clay to enhance the performance coordination and stability of the product.

[0035] 3. The additive uses halloysite nanotubes, calcined talc, and nano-magnesium oxide, which are improved through heat treatment. Through the coordination and optimization of the raw materials, the system of halloysite nanotubes with high specific surface area is coordinated with calcined talc and nano-magnesium oxide. At the same time, sodium silicate solution and carboxymethyl cellulose are used for coordinated optimization. The additive further strengthens the Guizhou clay-based admixture in the system. Thus, the Guizhou clay-based additive enhances the fracture toughness, wear resistance, easy cleaning, and thermal shock cycle resistance of the product. The product has excellent comprehensive performance and significant effects on temperature change resistance and corrosion stability.

[0036] 4. The modified quartz agent is prepared by blending silicon nitride, aluminum borate whiskers, and sodium dodecylbenzenesulfonate solution to form a modified liquid. The whisker structure of aluminum borate whiskers is used to harmonize the silicon nitride structure system, thereby optimizing and improving quartz. The resulting modified quartz liquid is then blended with additives and ball-milled for further improvement. The silicon carbide and montmorillonite in the additives are optimized by blending with lanthanum nitrate solution. Through the synergistic effect between the raw materials, the additives further reinforce and fill the modified quartz liquid. The resulting modified quartz agent coordinates with the Guizhou clay-based additives in the system, strengthening and optimizing the product structure and function, thereby further improving the product's performance. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0038] The preparation method of a spodumene heat-resistant ceramic cooker according to this embodiment includes the following steps:

[0039] Step 1: Weigh the raw materials according to their weight proportions:

[0040] 40-45 parts spodumene, 15-19 parts Guangxi white clay, 15-17 parts Guizhou clay-based admixture, 14-16 parts lithium clay ore, 8-12 parts modified quartz agent, and 1-3 parts bentonite.

[0041] Step 2: Wet ball milling of the raw materials from Step 1 at a speed of 1000-1500 r / min for 2 hours to obtain ball milling material. The ball milling material is then fed into a mold for molding. After molding, it is dried at room temperature until the surface moisture content of the blank is less than 5%. Finally, it is fired to obtain spodumene heat-resistant ceramic cookware.

[0042] In this embodiment, the firing temperature for the firing process is 1285-1295℃, and the firing time is 15-17 hours; the molding pressure for the molding process in the mold is 10-15 MPa, and the molding time is 2 hours.

[0043] The preparation method of the admixture based on Guizhou clay in this embodiment is as follows:

[0044] S11: Guizhou clay is first stirred thoroughly in a sufficient amount of potassium permanganate solution with a mass fraction of 12-15%, then washed with water, filtered, and dried. The dried Guizhou clay is then heat-homogenized to obtain heat-homogenized Guizhou clay.

[0045] S12: Preparation of the blending solution:

[0046] S12a: 5-8 parts by weight of 13X zeolite molecular sieve, 4-7 parts by weight of nano alumina and 3-5 parts by weight of boron nitride are blended and sintered for 1 hour at a sintering temperature of 350-370℃. After sintering, the sintered modified body is obtained.

[0047] S12b: β-cyclodextrin, sodium citrate solution and silane coupling agent KH550 are mixed evenly in a weight ratio of (3-5):(7-9):2 to obtain a compound solution; the sintered modified body and the compound solution are mixed evenly in a weight ratio of (4-7):11 to obtain a blended solution;

[0048] S13: Heat-homogenized Guizhou clay and admixture are mixed at a weight ratio of 7:(11-15). After mixing, an admixture based on Guizhou clay is obtained.

[0049] S14: The admixture and additive based on Guizhou clay were mixed and ball-milled at a weight ratio of (9-11):5. The ball milling speed was 1000-1500 r / min and the ball milling time was 2 h. After the ball milling was completed, the mixture was filtered and dried to obtain the admixture based on Guizhou clay.

[0050] In this embodiment, the stirring speed is 750-850 r / min, and the stirring time is 1 h; the mass fraction of the sodium citrate solution is 8-12%.

[0051] The specific steps for heat homogenization are as follows:

[0052] First, heat-treat at 210-230℃ for 1 hour, then raise the temperature to 350℃ at a rate of 2-4℃ / min and hold for 15-20 minutes, and finally lower the temperature to 55℃ at a rate of 1-3℃ / min and hold.

[0053] The preparation method of the additive in this embodiment is as follows:

[0054] S101: Halloysite nanotubes, calcined talc and nano-magnesium oxide are composited and heat-treated at a weight ratio of 3:2:2. The heat treatment temperature is 210-220℃ for 10 min, and then naturally cooled to room temperature to obtain the composite.

[0055] S102: Mix the composite, sodium silicate solution and carboxymethyl cellulose evenly according to the weight ratio (5-7):(7-11):2 to obtain the additive solution;

[0056] Basalt fiber and additive solution were ultrasonically treated at a weight ratio of 4:7. After ultrasonic treatment, the mixture was filtered and dried to obtain the additive.

[0057] In this embodiment, the sodium silicate solution has a mass fraction of 4-7%; the ultrasonic power for ultrasonic treatment is 350-400W, and the ultrasonic treatment lasts for 1 hour.

[0058] The preparation method of the modified quartz agent in this embodiment is as follows:

[0059] S111: Silicon nitride, aluminum borate whiskers and sodium dodecylbenzenesulfonate solution are mixed evenly in a weight ratio of (2-3):(3-4):7 to obtain a modified solution;

[0060] Quartz was stirred and modified in a modification solution of 4-7 times its total volume. After stirring, the quartz modification solution was obtained.

[0061] S112: Quartz modification liquid and additives are mixed at a weight ratio of (7-11):5 and ball-milled at a speed of 1000-1500 r / min for 2 hours. After ball milling, the mixture is filtered and dried to obtain modified quartz agent.

[0062] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 8-12%; the stirring speed for the stirring modification treatment is 300-350 r / min, and the stirring time is 2 h.

[0063] The additive in this embodiment is prepared by uniformly mixing silicon carbide, lanthanum nitrate solution and montmorillonite in a weight ratio of (3-5):7:(2-3).

[0064] The mass fraction of the lanthanum nitrate solution in this embodiment is 2-5%.

[0065] Example 1.

[0066] The preparation method of a spodumene heat-resistant ceramic cooker according to this embodiment includes the following steps:

[0067] Step 1: Weigh the raw materials according to their weight proportions:

[0068] 40 parts spodumene, 15 parts Guangxi white clay, 15 parts Guizhou clay-based admixture, 14 parts lithium clay ore, 8 parts modified quartz agent, and 1 part bentonite.

[0069] Step 2: Wet ball milling is performed on the raw materials from Step 1 at a speed of 1000 r / min for 2 hours to obtain ball milling material. The ball milling material is then fed into a mold for molding. After molding, the material is dried at room temperature until the surface moisture content of the blank is less than 5%. Finally, it is fired to obtain a spodumene heat-resistant ceramic cookware.

[0070] In this embodiment, the firing temperature for the firing process is 1285℃, and the firing time is 15 hours; the molding pressure for the molding process in the mold is 10 MPa, and the molding time is 2 hours.

[0071] The preparation method of the admixture based on Guizhou clay in this embodiment is as follows:

[0072] S11: Guizhou clay is first stirred thoroughly in a sufficient amount of 12% potassium permanganate solution, then washed with water, filtered, and dried. The dried Guizhou clay is then heat-homogenized to obtain heat-homogenized Guizhou clay.

[0073] S12: Preparation of the blending solution:

[0074] S12a: 5 parts by weight of 13X zeolite molecular sieve, 4 parts by weight of nano alumina and 3 parts by weight of boron nitride were blended and sintered for 1 hour at a sintering temperature of 350℃. After sintering, the sintered modified body was obtained.

[0075] S12b: β-cyclodextrin, sodium citrate solution and silane coupling agent KH550 are mixed evenly in a weight ratio of 3:7:2 to obtain a compound solution; the sintered modified body and the compound solution are mixed evenly in a weight ratio of 4:11 to obtain a blended solution;

[0076] S13: The heat-homogenized Guizhou clay and the admixture were mixed at a weight ratio of 7:11. After the mixing was completed, the admixture based on Guizhou clay was obtained.

[0077] S14: The admixture and additive based on Guizhou clay were mixed and ball-milled at a weight ratio of 9:5. The ball milling speed was 1000 r / min and the milling time was 2 h. After the ball milling was completed, the mixture was filtered and dried to obtain the admixture based on Guizhou clay.

[0078] In this embodiment, the stirring speed was 750 r / min, and the stirring time was 1 h; the mass fraction of the sodium citrate solution was 8%.

[0079] The specific steps for heat homogenization are as follows:

[0080] First, heat-treat at 210℃ for 1 hour, then raise the temperature to 350℃ at a rate of 2℃ / min and hold for 15 minutes, and finally lower the temperature to 55℃ at a rate of 1℃ / min and hold.

[0081] The preparation method of the additive in this embodiment is as follows:

[0082] S101: Halloysite nanotubes, calcined talc and nano-magnesium oxide were heat-treated in a weight ratio of 3:2:2 at 210℃ for 10 min and then naturally cooled to room temperature to obtain the composite.

[0083] S102: The composite, sodium silicate solution and carboxymethyl cellulose are mixed evenly in a weight ratio of 5:7:2 to obtain the additive solution;

[0084] Basalt fiber and additive solution were ultrasonically treated at a weight ratio of 4:7. After ultrasonic treatment, the mixture was filtered and dried to obtain the additive.

[0085] In this embodiment, the sodium silicate solution has a mass fraction of 4%; the ultrasonic power for ultrasonic treatment is 350W, and the ultrasonic treatment lasts for 1 hour.

[0086] The preparation method of the modified quartz agent in this embodiment is as follows:

[0087] S111: Silicon nitride, aluminum borate whiskers and sodium dodecylbenzenesulfonate solution are mixed evenly in a weight ratio of 2:3:7 to obtain a modified solution;

[0088] Quartz was mixed and modified in a modified solution with a volume of 4 times the total volume of quartz. After mixing, the modified quartz solution was obtained.

[0089] S112: Quartz modification liquid and additives are mixed at a weight ratio of 7:5 and ball-milled at a speed of 1000 r / min for 2 hours. After ball milling, the mixture is filtered and dried to obtain modified quartz agent.

[0090] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 8%; the stirring speed for the stirring modification treatment is 300 r / min, and the stirring time is 2 h.

[0091] The additive in this embodiment is prepared by uniformly mixing silicon carbide, lanthanum nitrate solution and montmorillonite in a weight ratio of 3:7:2.

[0092] The lanthanum nitrate solution in this embodiment has a mass fraction of 2%.

[0093] Example 2.

[0094] The preparation method of a spodumene heat-resistant ceramic cooker according to this embodiment includes the following steps:

[0095] Step 1: Weigh the raw materials according to their weight proportions:

[0096] 45 parts of spodumene, 19 parts of Guangxi white clay, 17 parts of Guizhou clay-based admixture, 16 parts of lithium clay ore, 12 parts of modified quartz agent, and 3 parts of bentonite.

[0097] Step 2: Wet ball milling is performed on the raw materials from Step 1 at a speed of 1500 r / min for 2 hours to obtain ball milling material. The ball milling material is then fed into a mold for molding. After molding, the material is dried at room temperature until the surface moisture content of the blank is less than 5%. Finally, it is fired to obtain a spodumene heat-resistant ceramic cookware.

[0098] In this embodiment, the firing temperature for the firing process is 1295℃, and the firing time is 17 hours; the molding pressure for the molding process in the mold is 15 MPa, and the molding time is 2 hours.

[0099] The preparation method of the admixture based on Guizhou clay in this embodiment is as follows:

[0100] S11: Guizhou clay is first stirred thoroughly in a sufficient amount of potassium permanganate solution with a mass fraction of 15%, then washed with water, filtered, and dried. The dried Guizhou clay is then heat-homogenized to obtain heat-homogenized Guizhou clay.

[0101] S12: Preparation of the blending solution:

[0102] S12a: 8 parts by weight of 13X zeolite molecular sieve, 7 parts by weight of nano alumina and 5 parts by weight of boron nitride were blended and sintered for 1 hour at a sintering temperature of 370℃. After sintering, the sintered modified body was obtained.

[0103] S12b: β-cyclodextrin, sodium citrate solution and silane coupling agent KH550 are mixed evenly in a weight ratio of 5:9:2 to obtain a compound solution; the sintered modified body and the compound solution are mixed evenly in a weight ratio of 7:11 to obtain a blended solution;

[0104] S13: The heat-homogenized Guizhou clay and the admixture were mixed at a weight ratio of 7:15. After the mixing was completed, the admixture based on Guizhou clay was obtained.

[0105] S14: The admixture and additive based on Guizhou clay were mixed and ball-milled at a weight ratio of 11:5. The ball milling speed was 1500 r / min and the ball milling time was 2 h. After the ball milling was completed, the mixture was filtered and dried to obtain the admixture based on Guizhou clay.

[0106] In this embodiment, the stirring speed was 850 r / min, and the stirring time was 1 h; the mass fraction of the sodium citrate solution was 12%.

[0107] The specific steps for heat homogenization are as follows:

[0108] First, heat-treat at 230℃ for 1 hour, then raise the temperature to 350℃ at a rate of 4℃ / min and hold for 20 minutes, and finally lower the temperature to 55℃ at a rate of 3℃ / min and hold.

[0109] The preparation method of the additive in this embodiment is as follows:

[0110] S101: Halloysite nanotubes, calcined talc and nano-magnesium oxide were heat-treated in a weight ratio of 3:2:2 at 220℃ for 10 min and then naturally cooled to room temperature to obtain the composite.

[0111] S102: The composite, sodium silicate solution and carboxymethyl cellulose are mixed evenly in a weight ratio of 7:11:2 to obtain the additive solution;

[0112] Basalt fiber and additive solution were ultrasonically treated at a weight ratio of 4:7. After ultrasonic treatment, the mixture was filtered and dried to obtain the additive.

[0113] In this embodiment, the sodium silicate solution has a mass fraction of 7%; the ultrasonic power for ultrasonic treatment is 400W, and the ultrasonic treatment lasts for 1 hour.

[0114] The preparation method of the modified quartz agent in this embodiment is as follows:

[0115] S111: Silicon nitride, aluminum borate whiskers and sodium dodecylbenzenesulfonate solution are mixed evenly in a weight ratio of 3:4:7 to obtain a modified solution;

[0116] Quartz was mixed and modified in a modified solution with a volume of 7 times the total volume of quartz. After mixing, the modified quartz solution was obtained.

[0117] S112: Quartz modification liquid and additives are mixed at a weight ratio of 11:5 and ball-milled at a speed of 1500 r / min for 2 hours. After ball milling, the mixture is filtered and dried to obtain modified quartz agent.

[0118] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 12%; the stirring speed for the stirring modification treatment is 350 r / min, and the stirring time is 2 h.

[0119] The additive in this embodiment is prepared by uniformly mixing silicon carbide, lanthanum nitrate solution and montmorillonite in a weight ratio of 5:7:3.

[0120] The lanthanum nitrate solution in this embodiment has a mass fraction of 5%.

[0121] Example 3.

[0122] The preparation method of a spodumene heat-resistant ceramic cooker according to this embodiment includes the following steps:

[0123] Step 1: Weigh the raw materials according to their weight proportions:

[0124] 42.5 parts of spodumene, 17 parts of Guangxi white clay, 16 parts of admixture based on Guizhou clay, 15 parts of lithium clay ore, 10 parts of modified quartz agent, and 2 parts of bentonite.

[0125] Step 2: Wet ball milling is performed on the raw materials from Step 1 at a speed of 1250 r / min for 2 hours to obtain ball milling material. The ball milling material is then fed into a mold for molding. After molding, the material is dried at room temperature until the surface moisture content of the blank is less than 5%. Finally, it is fired to obtain a spodumene heat-resistant ceramic cookware.

[0126] In this embodiment, the firing temperature for the firing process is 1290℃, and the firing time is 16 hours; the molding pressure for the molding process in the mold is 12.5 MPa, and the molding time is 2 hours.

[0127] The preparation method of the admixture based on Guizhou clay in this embodiment is as follows:

[0128] S11: Guizhou clay is first stirred thoroughly in a sufficient amount of potassium permanganate solution with a mass fraction of 13.5%, then washed with water, filtered, and dried. The dried Guizhou clay is then heat-homogenized to obtain heat-homogenized Guizhou clay.

[0129] S12: Preparation of the blending solution:

[0130] S12a: 6.5 parts by weight of 13X zeolite molecular sieve, 5.5 parts by weight of nano alumina and 4 parts by weight of boron nitride were blended and sintered for 1 hour at a sintering temperature of 360℃. After sintering, the sintered modified body was obtained.

[0131] S12b: β-cyclodextrin, sodium citrate solution and silane coupling agent KH550 are mixed evenly in a weight ratio of 4:8:2 to obtain a compound solution; the sintered modified body and the compound solution are mixed evenly in a weight ratio of 5.5:11 to obtain a blended solution;

[0132] S13: The heat-homogenized Guizhou clay and the admixture were mixed at a weight ratio of 7:13. After the mixing was completed, the admixture based on Guizhou clay was obtained.

[0133] S14: The admixture and additive based on Guizhou clay were mixed and ball-milled at a weight ratio of 10:5. The ball milling speed was 1250 r / min and the ball milling time was 2 h. After the ball milling was completed, the mixture was filtered and dried to obtain the admixture based on Guizhou clay.

[0134] In this embodiment, the stirring speed was 800 r / min, and the stirring time was 1 h; the mass fraction of the sodium citrate solution was 10%.

[0135] The specific steps for heat homogenization are as follows:

[0136] First, heat-treat at 220℃ for 1 hour, then raise the temperature to 350℃ at a rate of 3℃ / min and hold for 17.5 minutes, and finally lower the temperature to 55℃ at a rate of 2℃ / min and hold.

[0137] The preparation method of the additive in this embodiment is as follows:

[0138] S101: Halloysite nanotubes, calcined talc and nano-magnesium oxide are composited and heat-treated at a weight ratio of 3:2:2. The heat treatment temperature is 215℃ and the treatment time is 10 min. The composite is then naturally cooled to room temperature to obtain the composite.

[0139] S102: The composite, sodium silicate solution and carboxymethyl cellulose are mixed evenly in a weight ratio of 6:9:2 to obtain the additive solution;

[0140] Basalt fiber and additive solution were ultrasonically treated at a weight ratio of 4:7. After ultrasonic treatment, the mixture was filtered and dried to obtain the additive.

[0141] In this embodiment, the sodium silicate solution has a mass fraction of 5.5%; the ultrasonic power for ultrasonic treatment is 375W, and the ultrasonic treatment lasts for 1 hour.

[0142] The preparation method of the modified quartz agent in this embodiment is as follows:

[0143] S111: Silicon nitride, aluminum borate whiskers and sodium dodecylbenzenesulfonate solution are mixed evenly in a weight ratio of 2.5:3.5:7 to obtain a modified solution;

[0144] Quartz was stirred and modified in a modification solution with a volume of 5.5 times the total volume of quartz. After stirring, a quartz modification solution was obtained.

[0145] S112: Quartz modification liquid and additives are mixed at a weight ratio of 9:5 and ball-milled at a speed of 1250 r / min for 2 hours. After ball milling, the mixture is filtered and dried to obtain modified quartz agent.

[0146] In this embodiment, the sodium dodecylbenzenesulfonate solution has a mass fraction of 10%; the stirring speed for the stirring modification treatment is 320 r / min, and the stirring time is 2 h.

[0147] The additive in this embodiment is prepared by uniformly mixing silicon carbide, lanthanum nitrate solution and montmorillonite in a weight ratio of 4:7:2.5.

[0148] The lanthanum nitrate solution in this embodiment has a mass fraction of 3.5%.

[0149] Comparative Example 1.

[0150] Unlike Example 3, no admixture based on Guizhou clay was added.

[0151] Comparative Example 2.

[0152] Unlike Example 3, no Guizhou clay-based admixture was added in the preparation of the admixture based on Guizhou clay.

[0153] Comparative Example 3.

[0154] Unlike Example 3, no admixture was added in the preparation of the admixture based on Guizhou clay.

[0155] Comparative Example 4.

[0156] Unlike Example 3, no sintering modifier was added to the blending solution.

[0157] Comparative Example 5.

[0158] Unlike Example 3, no nano-alumina and boron nitride were added to the sintered modified body.

[0159] Comparative Example 6.

[0160] Unlike Example 3, the Guizhou clay used for heat homogenization was directly replaced with Guizhou clay without any other processing steps.

[0161] Comparative Example 7.

[0162] Unlike Example 3, no additives were added in the preparation of the admixture based on Guizhou clay.

[0163] Comparative Example 8.

[0164] Unlike Example 3, no additive solution was added to the additive.

[0165] Comparative Example 9.

[0166] Unlike Example 3, no complex was added to the additive solution.

[0167] Comparative Example 10.

[0168] Unlike Example 3, no calcined talc and nano-magnesium oxide were added to the composite.

[0169] Comparative Example 11.

[0170] Unlike Example 3, no modified quartz agent was added.

[0171] The products of Examples 1-3 and Comparative Examples 1-11 were subjected to fracture toughness, abrasion resistance, easy cleaning, and thermal shock cycling tests. The products were also tested for temperature change resistance and corrosion stability (the products were treated at 150℃ for 6 hours, then at -10℃ for 6 hours, and then placed under 5% hydrochloric acid mist for 12 hours; this constituted one cycle, and the cycle was repeated 10 times). The test results are as follows:

[0172] As can be seen from Comparative Examples 1-11 and Examples 1-3;

[0173] The product in Example 3 has excellent fracture toughness, wear resistance, easy cleaning and poor thermal shock cycle performance. The product has excellent overall coordination and significant effects in temperature change resistance and corrosion resistance.

[0174] The product's performance deteriorates significantly if either the Guizhou clay-based additive or the modified quartz agent is not added. The product's performance is most significantly improved when the Guizhou clay-based additive and the modified quartz agent are blended and formulated together to achieve a synergistic effect.

[0175] In the preparation of the Guizhou clay-based additives, no Guizhou clay-based blending solution was added; in the preparation of the Guizhou clay-based blending solution, no blending solution was added; no sintering modifier was added to the blending solution; no nano-alumina and boron nitride were added to the sintering modifier; the thermally homogenized Guizhou clay was directly replaced by Guizhou clay without any other treatment steps; no effector was added in the preparation of the Guizhou clay-based additives; no effector was added to the effector; no composite was added to the effector; and no calcined talc and nano-magnesium oxide were added to the composite. The performance of the products all showed a trend of deterioration to varying degrees.

[0176] The preparation of the additive in this invention is proprietary. The additive liquid obtained by a specific method, combined with the additive made from basalt fiber, results in the most significant performance effect of the product.

[0177] Furthermore, the preparation of the admixture based on Guizhou clay is also specific. The admixture based on Guizhou clay obtained by using the specific method of this invention to prepare the additive has the most significant performance effect. Other methods are not as effective as those of this invention.

[0178] Based on the above tests, the modified quartz agent of the present invention has a significant impact on the performance of the product. Therefore, the present invention conducts further research.

[0179] Experimental Example 1.

[0180] Unlike Example 3, no additives were added during the preparation of the modified quartz agent.

[0181] Experimental Example 2.

[0182] Unlike Example 3, silicon carbide and montmorillonite were not added to the additive.

[0183] Experimental Example 3.

[0184] Unlike Example 3, in the preparation of the modified quartz agent, the quartz modification liquid was not treated with a modification liquid.

[0185] Experimental Example 4.

[0186] Unlike Example 3, silicon nitride and aluminum borate whiskers were not added to the modified solution.

[0187] The performance tests for Experiments 1-4 are as follows:

[0188] As can be seen from Experiments 1-4, when no additives were added during the preparation of the modified quartz agent, the product performance deteriorated most significantly among the factors affecting the preparation of the modified quartz agent. The absence of silicon carbide and montmorillonite as additives, the failure to use a modified quartz solution for treatment, and the absence of silicon nitride and aluminum borate whiskers in the modified quartz solution all resulted in a deterioration in product performance. Only the modified quartz agent prepared using the method of this invention showed the most significant performance improvement. In the preparation of the modified quartz agent, all raw materials are indispensable; only by using the specific raw material ratio of this invention can the effect be significantly improved compared to other raw material ratios.

[0189] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0190] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for preparing a spodumene heat-resistant ceramic cookware, characterized in that, Includes the following steps: Step 1: Weigh the raw materials according to their weight proportions: 40-45 parts spodumene, 15-19 parts Guangxi white clay, 15-17 parts Guizhou clay-based admixture, 14-16 parts lithium clay ore, 8-12 parts modified quartz agent, and 1-3 parts bentonite. Step 2: Wet ball milling of the raw materials from Step 1 at a speed of 1000-1500 r / min for 2 hours to obtain ball milling material. The ball milling material is then fed into a mold for molding. After molding, it is dried at room temperature until the surface moisture content of the blank is less than 5%. Finally, it is fired to obtain spodumene heat-resistant ceramic cookware. The preparation method of the admixture based on Guizhou clay is as follows: S11: Guizhou clay is first stirred thoroughly in a sufficient amount of potassium permanganate solution with a mass fraction of 12-15%, then washed with water, filtered, and dried. The dried Guizhou clay is then heat-homogenized to obtain heat-homogenized Guizhou clay. S12: Preparation of the blending solution: S12a: 5-8 parts by weight of 13X zeolite molecular sieve, 4-7 parts by weight of nano alumina and 3-5 parts by weight of boron nitride are blended and sintered for 1 hour at a sintering temperature of 350-370℃. After sintering, the sintered modified body is obtained. S12b: β-cyclodextrin, sodium citrate solution and silane coupling agent KH550 are mixed evenly in a weight ratio of (3-5):(7-9):2 to obtain a compound solution; the sintered modified body and the compound solution are mixed evenly in a weight ratio of (4-7):11 to obtain a blended solution; S13: Heat-homogenized Guizhou clay and admixture are mixed at a weight ratio of 7:(11-15). After mixing, an admixture based on Guizhou clay is obtained. S14: The admixture and additive based on Guizhou clay were mixed and ball-milled at a weight ratio of (9-11):

5. The ball milling speed was 1000-1500 r / min and the ball milling time was 2 h. After the ball milling was completed, the mixture was filtered and dried to obtain the admixture based on Guizhou clay. The preparation method of the additive is as follows: S101: Halloysite nanotubes, calcined talc and nano-magnesium oxide are composited and heat-treated at a weight ratio of 3:2:

2. The heat treatment temperature is 210-220℃ for 10 min, and then naturally cooled to room temperature to obtain the composite. S102: Mix the composite, sodium silicate solution and carboxymethyl cellulose evenly according to the weight ratio (5-7):(7-11):2 to obtain the additive solution; Basalt fiber and additive solution were ultrasonically treated at a weight ratio of 4:

7. After ultrasonic treatment, the mixture was filtered and dried to obtain the additive. The method for preparing the modified quartz agent is as follows: S111: Silicon nitride, aluminum borate whiskers and sodium dodecylbenzenesulfonate solution are mixed evenly in a weight ratio of (2-3):(3-4):7 to obtain a modified solution; Quartz was mixed and modified in a modification solution of 4-7 times its total volume. After mixing, the quartz modification solution was obtained. S112: Quartz modification liquid and additives are mixed at a weight ratio of (7-11):5 and ball-milled at a speed of 1000-1500 r / min for 2 hours. After ball milling, the mixture is filtered and dried to obtain modified quartz agent. The additive is prepared by uniformly mixing silicon carbide, lanthanum nitrate solution and montmorillonite in a weight ratio of (3-5):7:(2-3).

2. The method for preparing a spodumene heat-resistant ceramic cooker according to claim 1, characterized in that, The firing temperature for the firing process is 1285-1295℃, and the firing time is 15-17 hours; the molding pressure for the molding process in the mold is 10-15 MPa, and the molding time is 2 hours.

3. The method for preparing a spodumene heat-resistant ceramic cookware according to claim 2, characterized in that, The stirring speed for the stirring process is 750-850 r / min, and the stirring time is 1 h; the mass fraction of the sodium citrate solution is 8-12%. The specific steps for heat homogenization are as follows: First, heat-treat at 210-230℃ for 1 hour, then raise the temperature to 350℃ at a rate of 2-4℃ / min and hold for 15-20 minutes, and finally lower the temperature to 55℃ at a rate of 1-3℃ / min and hold.

4. The method for preparing a spodumene heat-resistant ceramic cookware according to claim 3, characterized in that, The sodium silicate solution has a mass fraction of 4-7%; the ultrasonic power for ultrasonic treatment is 350-400W, and the ultrasonic treatment lasts for 1 hour.

5. The method for preparing a spodumene heat-resistant ceramic cookware according to claim 4, characterized in that, The sodium dodecylbenzenesulfonate solution has a mass fraction of 8-12%; the stirring speed for the stirring modification treatment is 300-350 r / min, and the stirring time is 2 h.

6. The method for preparing a spodumene heat-resistant ceramic cooker according to claim 5, characterized in that, The lanthanum nitrate solution has a mass fraction of 2-5%.

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