A purple sand ceramic material and a method for preparing a purple sand appliance

Abstract

The application discloses a purple sand ceramic material and a method for preparing a purple sand appliance. 2 3-6wt%, the loess and the yellow sand particles are firstly ball milled to obtain a slurry, then the slurry and other raw materials are mixed, ball milled and sieved to obtain a suspension according to the weight percentage of the above raw material formula, then the suspension is subjected to mud kneading, mud refining and aging to obtain a mud material, then the mud material is subjected to a pulling or injection method to obtain a green body, and finally the green body is dried and fired to obtain the purple sand appliance. The purple sand appliance has double-structure pores, good air permeability, no leakage, simple preparation process, low cost and wide market prospect.

Description

Technical Field

[0001] This invention belongs to the field of ceramic raw materials, specifically relating to a purple clay ceramic material and a method for preparing purple clay utensils. Background Technology

[0002] The name "Zisha" (purple clay) originates from the fact that its products are mostly purple or black, the color of which is determined by the chemical composition of the raw materials and the firing atmosphere in the kiln. "Sand" refers to the unique granular texture of Zisha products, formed by their rich, porous structure. Due to this "double" porous structure, Zisha products produce a long-lasting aroma when brewing tea, and with prolonged use, the surface becomes increasingly lustrous, jade-like, and elegant, resulting in a series of excellent qualities that make them particularly popular. However, the mineral raw materials for Zisha pottery are non-renewable resources. After over a century of mining and unregulated illegal extraction, high-quality Zisha mineral raw materials are becoming increasingly scarce. Since non-renewable resources will eventually run out, finding alternative mineral raw materials is extremely urgent. Furthermore, due to the porous structure of Zisha, a layer of tea stains forms on the surface after prolonged use, which is difficult to clean and easily breeds bacteria. Therefore, improving the antibacterial and cleaning functions of Zisha is also of great importance. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a low-cost, simple-process, and high-quality purple clay ceramic material and a method for preparing purple clay utensils.

[0004] This invention is achieved through the following technical solution: a purple clay ceramic material, characterized in that: the weight percentage composition of the purple clay ceramic material is: 40-65 wt% loess, 10-35 wt% yellow sand particles, 10-20 wt% high-iron red mud, 2-4 wt% shell powder, 1-3 wt% nano zinc oxide, 5-10 wt% rice husk, and 3-6 wt% nano TiO2.

[0005] The loess particles have a particle size of 200 mesh, and the yellow sand particles have a particle size of 60 mesh.

[0006] The chemical composition of the loess is as follows: SiO2 63.85%, Al2O3 16.50%, Fe2O3 5.82%, CaO 1.01%, MgO 1.46%, K2O 2.60%, Na2O 0.99%, TiO2 0.82%, IL 6.95%;

[0007] The chemical composition of the yellow sand particles is as follows: SiO2 64.92%, Al2O3 15.81%, Fe2O3 5.87%, CaO 1.17%, MgO 1.48%, K2O 2.76%, Na2O 1.21%, TiO2 0.79%, and IL 5.99%.

[0008] The chemical composition of the high-iron red mud is as follows: SiO2 21.20%, Al2O3 3.40%, Fe2O3 64.14%, CaO 2.16%, MgO 1.85%, K2O 0.64%, P2O5 0.14%, SO3 0.51%, MnO 0.09%, TiO2 0.26%, Cr2O3 0.06%, ZnO 4.19%, ZrO2 0.01%, CuO 0.30%, SrO 0.01%, and IL 1.02%.

[0009] The method for preparing Zisha utensils from the above-mentioned Zisha ceramic materials is characterized by including the following steps:

[0010] Step 1: Process loess into a slurry with a particle size of 200 mesh and yellow sand into a slurry with a particle size of 60 mesh by ball milling;

[0011] Step 2: Weigh out loess slurry, yellow sand slurry, high-iron red mud, shell powder, nano zinc oxide, rice bran, and nano TiO2 according to the weight percentage of the dry materials in the raw material formula. Mix the raw materials together, ball mill them, and sieve them to obtain a suspension.

[0012] Step 3: The clay is prepared by kneading, refining, and aging to obtain raw clay. The raw clay is then obtained by throwing or slip casting. Finally, the clay is dried and fired to obtain Zisha ware.

[0013] In step one, the loess ball milling process takes 60 minutes and the speed is 400 r / min; the yellow sand ball milling process takes 30 minutes and the speed is 300 r / min.

[0014] In step two, the ball milling process takes 30 minutes and the speed is 300 r / min; the sieving process uses 80 mesh and leaves a residue of 1.0%.

[0015] In step three, the moisture content of the mud after the mud-binding process is 18-21%; the vacuum degree of the mud-refining process is 0.09 MPa; and the aging process takes more than 7 days.

[0016] The drying process in step three takes 360 minutes and the temperature is 95°C. The firing process is as follows: under an oxidizing atmosphere, the temperature is increased from room temperature to 1000°C at a rate of 5°C / min, then increased to 1100-1200°C at a rate of 3°C / min, held for 1 hour, and then naturally cooled to room temperature.

[0017] In step three, the purple clay ware has a purple appearance and its chromaticity values ​​are: L* value between 30.42 and 42.58, a* value between 12.39 and 20.12, and b* value between 13.67 and 18.25.

[0018] The water absorption rate of the Zisha pottery in step three is between 3.65% and 5.83%. It has a double-structured pore structure, good air permeability, but no leakage.

[0019] This invention utilizes raw materials such as loess, yellow sand, high-iron red mud, and shell powder to prepare Zisha (purple clay) ware. The loess, yellow sand, high-iron red mud, and shell powder contain appropriate amounts of SiO2, Al2O3, and fluxing substances, which determines a suitable firing temperature for the Zisha ware. Furthermore, the formula contains a moderate amount of Fe2O3, which is beneficial for the color development of the Zisha ware when fired in an oxidizing atmosphere.

[0020] This invention utilizes loess as the main raw material, primarily taking advantage of its high plasticity, which is beneficial for the shaping of Zisha ware green bodies. During the firing process, small pores are also formed. The loess particles have a certain particle size, providing a framework for Zisha ware and making it less prone to deformation during firing. Red clay has a high iron oxide content. By rationally combining these raw materials, the main crystalline phases formed are quartz, mullite, and Fe2O3. This not only ensures that the clay has suitable plasticity but also forms a network framework with a dual-structure pore structure, thereby improving the strength of Zisha ware.

[0021] Adding appropriate amounts of nano-titanium oxide and nano-zinc oxide to the raw material formula allows them to react with elements such as Zn, Ti, and Fe in the raw materials at high temperatures, forming a composite antibacterial agent in situ, which gives the purple clay ware excellent antibacterial properties.

[0022] After being fired in the clay body, rice husks form nano-oxides, whose main chemical composition is amorphous nano-silica, etc., while shell powder has a layered structure and easily forms nano-CaO after firing. They work synergistically with nano-TiO2, Fe2O3, etc. to comprehensively modify and alter the pores, thereby improving the oleophobic effect of purple clay ceramic materials. This is because the loess, yellow sand particles, and high-iron red mud form pores during the firing process. Under the action of surface physicochemical processes, nano-calcium oxide, nano-zinc oxide, rice husks, and nano-TiO2 react, precipitating many tiny micro- and nano-crystalline protrusions with a size of about 200 nm in situ within the pores. These tiny micro- and nano-crystalline protrusions not only increase the specific surface area of ​​the pores but also have a significant impact on the cluster structure of water, selectively adsorbing some substances in the water, opening up the water cluster structure, and increasing the water's activity and bactericidal functions. At the same time, it modifies these pores, improving the oleophobic properties of Zisha ceramics, making it difficult for substances such as tea stains to adhere to its surface, thus making it easy to clean. Due to the small, tortuous pore structure, Zisha ware has good air permeability, but due to the surface tension of water, leakage will not occur.

[0023] At the junction between yellow sand grains and loess, tiny pores are left during the firing process. Also, because the surface of the yellow sand grains is coated with an appropriate amount of fluxing components at the corresponding firing temperature, an appropriate amount of liquid phase is generated, which realizes the neck connection between the grains and prevents the formation of large pores. This results in a double pore structure, which has a breathing function, which is beneficial to the breathability of Zisha ware. Tea is also less likely to spoil, thus improving the health benefits of Zisha ware.

[0024] The positive and beneficial effects of this invention are as follows:

[0025] This invention uses loess, yellow sand particles, and high-iron red mud as the main raw materials to achieve high-quality utilization of these idle raw materials. This not only greatly saves costs but also breaks away from the dependence of Zisha ware on unique raw materials, providing scientific guidance for the sustainable development of Zisha ware. Attached Figure Description

[0026] Figure 1 Cross-sectional scanning structure of the product of Example 1 Figure 1 ;

[0027] Figure 2 This is a cross-sectional scan structure of the product of Example 1. Figure 2 . Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the present invention will be described in detail below with reference to preferred embodiments:

[0029] The chemical composition of the loess is as follows: SiO2 63.85%, Al2O3 16.50%, Fe2O3 5.82%, CaO 1.01%, MgO 1.46%, K2O 2.60%, Na2O 0.99%, TiO2 0.82%, IL 6.95%;

[0030] The chemical composition of the yellow sand particles is as follows: SiO2 64.92%, Al2O3 15.81%, Fe2O3 5.87%, CaO 1.17%, MgO 1.48%, K2O 2.76%, Na2O 1.21%, TiO2 0.79%, and IL 5.99%.

[0031] The chemical composition of the high-iron red mud is as follows: SiO2 21.20%, Al2O3 3.40%, Fe2O3 64.14%, CaO 2.16%, MgO 1.85%, K2O 0.64%, P2O5 0.14%, SO3 0.51%, MnO 0.09%, TiO2 0.26%, Cr2O3 0.06%, ZnO 4.19%, ZrO2 0.01%, CuO 0.30%, SrO 0.01%, and IL 1.02%. Example 1

[0032] A purple clay ceramic material, characterized in that: the weight percentage composition of the purple clay ceramic material is: 40wt% loess, 35wt% yellow sand particles, 12wt% high-iron red mud, 3wt% shell powder, 2wt% nano zinc oxide, 5wt% rice husk, and 3wt% nano TiO2.

[0033] The loess particles have a particle size of 200 mesh, and the yellow sand particles have a particle size of 60 mesh.

[0034] The method for preparing Zisha utensils from the above-mentioned Zisha ceramic materials is characterized by including the following steps:

[0035] Step 1: Process loess into a slurry with a particle size of 200 mesh and yellow sand into a slurry with a particle size of 60 mesh by ball milling;

[0036] Step 2: Weigh out loess slurry, yellow sand slurry, high-iron red mud, shell powder, nano zinc oxide, rice bran, and nano TiO2 according to the weight percentage of the dry materials in the raw material formula. Mix the raw materials together, ball mill them, and sieve them to obtain a suspension.

[0037] Step 3: The clay is prepared by kneading, refining, and aging to obtain raw clay. The clay is then shaped into green pieces by throwing, and finally dried and fired to obtain Zisha ware.

[0038] In step one, the loess ball milling process takes 60 minutes and the speed is 400 r / min; the yellow sand ball milling process takes 30 minutes and the speed is 300 r / min.

[0039] In step two, the ball milling process takes 30 minutes and the speed is 300 r / min; the sieving process has a mesh size of 80 mesh and a sieve residue of 1.0%.

[0040] In step three, the moisture content of the mud after the mud-binding process is 18%; the vacuum degree of the mud-binding process is 0.09 MPa; and the aging process takes more than 7 days.

[0041] The drying process in step three takes 360 minutes and the temperature is 95°C. The firing process is as follows: under an oxidizing atmosphere, the temperature is increased from room temperature to 1000°C at a rate of 5°C / min, then increased to 1100°C at a rate of 3°C / min, held for 1 hour, and then naturally cooled to room temperature.

[0042] In step three, the purple clay ware has a purple appearance and a chromaticity value of L*=31.42, a*=16.39, b*=17.57.

[0043] The Zisha pottery in step three has a water absorption rate of 4.65%, has a double-structured pore structure, good air permeability, but does not leak. Example 2

[0044] A purple clay ceramic material, characterized in that: the weight percentage composition of the purple clay ceramic material is: 48wt% loess, 20wt% yellow sand particles, 18wt% high-iron red mud, 2wt% shell powder, 1wt% nano zinc oxide, 6wt% rice husk, and 5wt% nano TiO2.

[0045] The loess particles have a particle size of 200 mesh, and the yellow sand particles have a particle size of 60 mesh.

[0046] The method for preparing Zisha utensils from the above-mentioned Zisha ceramic materials is characterized by including the following steps:

[0047] Step 1: Process loess into a slurry with a particle size of 200 mesh and yellow sand into a slurry with a particle size of 60 mesh by ball milling;

[0048] Step 2: Weigh out loess slurry, yellow sand slurry, high-iron red mud, shell powder, nano zinc oxide, rice bran, and nano TiO2 according to the weight percentage of the dry materials in the raw material formula. Mix the raw materials together, ball mill them, and sieve them to obtain a suspension.

[0049] Step 3: The clay is prepared by kneading, refining, and aging to obtain raw clay. The clay is then poured into the pottery to obtain the raw clay body. Finally, the clay is dried and fired to obtain the Zisha ware.

[0050] In step one, the loess ball milling process takes 60 minutes and the speed is 400 r / min; the yellow sand ball milling process takes 30 minutes and the speed is 300 r / min.

[0051] In step two, the ball milling process takes 30 minutes and the speed is 300 r / min; the sieving process has a mesh size of 80 mesh and a sieve residue of 1.0%.

[0052] In step three, the moisture content of the mud after the mud-binding process is 20%; the vacuum degree of the mud-binding process is 0.09 MPa; and the aging process takes more than 7 days.

[0053] The drying process in step three takes 360 minutes and the temperature is 95°C. The firing process is as follows: under an oxidizing atmosphere, the temperature is increased from room temperature to 1000°C at a rate of 5°C / min, then increased to 1150°C at a rate of 3°C / min, held for 1 hour, and then naturally cooled to room temperature.

[0054] In step three, the purple clay ware has a purple appearance and a chromaticity value of L*=33.83, a*=13.92, b*=16.37.

[0055] The Zisha pottery in step three has a water absorption rate of 5.26%, has a double-structured pore structure, good air permeability, but does not leak. Example 3

[0056] A purple clay ceramic material, characterized in that: the weight percentage composition of the purple clay ceramic material is: 60wt% loess, 15wt% yellow sand particles, 10wt% high-iron red mud, 2wt% shell powder, 1wt% nano zinc oxide, 8wt% rice husk, and 4wt% nano TiO2.

[0057] The loess particles have a particle size of 200 mesh, and the yellow sand particles have a particle size of 60 mesh.

[0058] The method for preparing Zisha utensils from the above-mentioned Zisha ceramic materials is characterized by including the following steps:

[0059] Step 1: Process loess into a slurry with a particle size of 200 mesh and yellow sand into a slurry with a particle size of 60 mesh by ball milling;

[0060] Step 2: Weigh out loess slurry, yellow sand slurry, high-iron red mud, shell powder, nano zinc oxide, rice bran, and nano TiO2 according to the weight percentage of the dry materials in the raw material formula. Mix the raw materials together, ball mill them, and sieve them to obtain a suspension.

[0061] Step 3: The clay is prepared by kneading, refining, and aging to obtain raw clay. The clay is then shaped into green pieces by throwing, and finally dried and fired to obtain Zisha ware.

[0062] In step one, the loess ball milling process takes 60 minutes and the speed is 400 r / min; the yellow sand ball milling process takes 30 minutes and the speed is 300 r / min.

[0063] In step two, the ball milling process takes 30 minutes and the speed is 300 r / min; the sieving process has a mesh size of 80 mesh and a sieve residue of 1.0%.

[0064] In step three, the moisture content of the mud after the mud-binding process is 21%; the vacuum degree of the mud-binding process is 0.09 MPa; and the aging process takes more than 7 days.

[0065] The drying process in step three takes 360 minutes and the temperature is 95°C. The firing process is as follows: under an oxidizing atmosphere, the temperature is increased from room temperature to 1000°C at a rate of 5°C / min, then increased to 1200°C at a rate of 3°C / min, held for 1 hour, and then naturally cooled to room temperature.

[0066] In step three, the purple clay ware has a purple appearance and a chromaticity value of L*=39.26, a*=19.33, b*=14.25.

[0067] The Zisha pottery in step three has a water absorption rate of 3.97%, has a double-structured pore structure, good air permeability, but does not leak.

Claims

1. A purple clay ceramic material, characterized in that: The weight percentage composition of the purple clay ceramic material is as follows: 40-65 wt% loess, 10-35 wt% yellow sand particles, 10-20 wt% high-iron red mud, 2-4 wt% shell powder, 1-3 wt% nano zinc oxide, 5-10 wt% rice husk, and 3-6 wt% nano TiO2.

2. The purple clay ceramic material according to claim 1, characterized in that: The loess particles have a particle size of 200 mesh, and the yellow sand particles have a particle size of 60 mesh.

3. The boccaro ceramic material according to claim 1, characterized in that: The chemical composition of the loess is as follows: SiO2 63.85%, Al2O3 16.50%, Fe2O3 5.82%, CaO 1.01%, MgO 1.46%, K2O 2.60%, Na2O 0.99%, TiO2 0.82%, IL 6.95%; The chemical composition of the yellow sand particles is as follows: SiO2 64.92%, Al2O3 15.81%, Fe2O3 5.87%, CaO 1.17%, MgO 1.48%, K2O 2.76%, Na2O 1.21%, TiO2 0.79%, and IL 5.99%.

4. The method of claim 1, wherein the method of manufacturing a red stoneware ware from the red stoneware ceramic material is characterized by Includes the following steps: Step 1: Process loess into a slurry with a particle size of 200 mesh and yellow sand into a slurry with a particle size of 60 mesh by ball milling; Step 2: Weigh out loess slurry, yellow sand slurry, high-iron red mud, shell powder, nano zinc oxide, rice bran, and nano TiO2 according to the weight percentage of the dry materials in the raw material formula. Mix the raw materials together, ball mill them, and sieve them to obtain a suspension. Step 3: The clay is prepared by kneading, refining, and aging to obtain raw clay. The raw clay is then obtained by throwing or slip casting. Finally, the clay is dried and fired to obtain Zisha ware.

5. The method of claim 4, wherein: In step one, the loess ball milling process takes 60 minutes at a speed of 400 r / min; the yellow sand ball milling process takes 30 minutes at a speed of 300 r / min.

6. The method of claim 4, wherein: In step two, the ball milling process takes 30 minutes and the speed is 300 r / min; the sieving process has a mesh size of 80 mesh and a sieve residue of 1.0%.

7. The method of claim 4, wherein: In step three, the moisture content of the mud after the mud-binding process is 18-21%; the vacuum degree of the mud-refining process is 0.09 MPa; and the aging process takes more than 7 days.

8. The method of claim 4, wherein: The drying process in step three takes 360 minutes and the temperature is 95°C. The firing process is as follows: under an oxidizing atmosphere, the temperature is increased from room temperature to 1000°C at a rate of 5°C / min, then increased to 1100-1200°C at a rate of 3°C / min, held for 1 hour, and then naturally cooled to room temperature.

9. The method according to claim 4, characterized in that: In step three, the purple clay ware has a purple appearance and its chromaticity values ​​are: L* value between 30.42 and 42.58, a* value between 12.39 and 20.12, and b* value between 13.67 and 18.

25.

10. The method of claim 4, wherein: The water absorption rate of the Zisha pottery in step three is between 3.65% and 5.83%. It has a double-structured pore structure, which allows for good air permeability but does not leak.

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