A negative oxygen ion health-care cup and a preparation process thereof

Abstract

This application relates to the field of ceramic product technology, specifically disclosing a negative ion health-preserving cup and its preparation process. This application improves the ceramic material formulation system by adding filler fibers and dolomite to the body. By adopting the solution of this application, not only can thermal stress be absorbed, but the coefficient of thermal expansion of the body can also be reduced, and the resistance to thermal stress can be improved. This results in teacups and teapots with good crack resistance, reducing the possibility of cracking during glaze firing and helping to improve the product yield. Simultaneously, due to the addition of negative ion powder, the health-preserving cup product possesses the function of promoting the generation of negative ions, thus exerting certain health-preserving effects.

Description

Technical Field

[0001] This application relates to the field of ceramic products technology, and more specifically, it relates to a negative ion health cup and its preparation process. Background Technology

[0002] Currently, health and wellness benefits have become an important factor for modern consumers when purchasing daily necessities, and products with these benefits often have broad market prospects. Some negative ion-related products have already appeared on the market. These products generate negative ions that can purify the air, optimize microcirculation, inhibit bacterial growth, and provide adjunctive treatment for certain diseases, thus helping to improve overall health. Tea drinking, as a traditional health practice, has always been highly favored, and combining negative ions with teaware represents one of the future development directions for teaware.

[0003] One type of ceramic cup in the related technology includes a body and a glaze layer. The body is obtained by bisque firing of a green body, which is made by pressing powder. The powder includes the following components by weight: 27 parts montmorillonite, 18 parts diaspore, 12 parts quartz sand, 8 parts red mud, 13 parts andalusite, 6 parts maifanite, 7 parts diopside, 5 parts calcite, and 3 parts strontium carbonate. The glaze layer is obtained by glazing a glaze applied to the surface of the body and then firing it.

[0004] Regarding the aforementioned technologies, the inventors believe that although the ceramic cups in these technologies can be used as teacups, they do not possess sufficient health benefits. Furthermore, the ceramic body in these technologies has poor crack resistance and is prone to cracking during the glaze firing process, which is not conducive to fully improving the product yield. Summary of the Invention

[0005] The ceramic cups in the related technologies do not possess sufficient health benefits, and their bodies are prone to cracking during the glazing and firing process, which is not conducive to fully improving the product yield. In order to overcome this deficiency, this application provides a negative ion health cup and its preparation process.

[0006] Firstly, this application provides a negative ion health cup, which adopts the following technical solution:

[0007] A negative ion health cup includes a body and a glaze layer. The body is made from a green body and the green body is composed of powder and filler fibers. The amount of filler fibers is 1-5% of the weight of the powder. The powder includes the following components in parts by weight: 27-31 parts montmorillonite, 18-20 parts diaspore, 12-15 parts quartz sand, 8-10 parts red mud, 13-15 parts andalusite, 6-8 parts maifanite, 7-9 parts diopside, 5-8 parts calcite, 3-6 parts strontium carbonate, 14-18 parts dolomite, and 1.8-5.8 parts negative ion powder. The filler fibers are basalt fibers with nano-magnesium oxide loaded on their surface.

[0008] By adopting the above technical solution, this application adjusts the formula based on related technologies. The powder used in this application includes newly added dolomite and negative oxygen ion powder, which is then blended with filler fibers before being used to prepare the green body. During calcination, dolomite produces carbon dioxide and magnesium oxide. Carbon dioxide has a certain pore-forming effect, absorbing some stress through the formation of pores, thus helping to reduce residual stress in the green body. The magnesium oxide formed by calcining dolomite and the nano-magnesium oxide on the surface of the filler fibers can react with the silica-alumina components in the powder to produce a cordierite phase. The formation of the cordierite phase reduces the coefficient of thermal expansion of the green body and allows the filler fibers to bond more firmly with the surrounding mineral particles. This fully utilizes the mechanical properties of basalt fibers to resist the thermal stress generated during glazing, while the filler fibers also hinder the thermal expansion of the green body, allowing the cordierite phase to effectively reduce the coefficient of thermal expansion.

[0009] It is evident that by adopting the solution of this application, not only can the residual stress in the green body be reduced, but the coefficient of thermal expansion of the green body can also be lowered, and the resistance of the green body to thermal stress can be improved. This results in good crack resistance in the green body, reducing the possibility of cracking during glaze firing and leading to a higher product yield. Furthermore, due to the addition of negative ion powder, the resulting health-preserving cup possesses the function of promoting the generation of negative ions, thus exerting certain health-preserving effects.

[0010] Preferably, the filling fiber is prepared according to the following method:

[0011] (1) Nano-magnesium oxide, silicon powder, and sodium hydroxide are mixed in water and heated to obtain a magnesium-containing silica sol for later use; continuous basalt fibers are degreased by calcination, and then cut and bundled to obtain basalt fiber bundles for later use; the weight ratio of nano-magnesium oxide to silicon powder is (1-3.8):1.

[0012] (2) The basalt fiber bundles are immersed in magnesium silica sol and ultrasonically treated. Then sodium hydroxide is added to cause the magnesium silica sol to flocculate. The basalt fiber bundles are then taken out and dried. After being cut again, the filling fibers are obtained.

[0013] By adopting the above technical solution, this application incorporates nano-magnesium oxide into the preparation system of alkaline silica sol to obtain magnesium-containing silica sol. Then, through ultrasonic treatment, basalt fiber bundles are brought into full contact with the magnesium-containing silica sol. The hydroxide ions in the magnesium-containing silica sol can erode the basalt fiber bundles, forming adhesive sodium silicate on the surface of the basalt fiber bundles. This allows a certain amount of magnesium-containing silica sol to adhere to the surface of the basalt fiber bundles, achieving the loading of nano-magnesium oxide. Subsequently, the pH is adjusted to induce flocculation of the magnesium-containing silica sol, and after drying, the filled fibers are obtained.

[0014] Preferably, the weight ratio of the nano-magnesium oxide to silicon powder is (2.6-3.8):1.

[0015] By adopting the above technical solution, the weight ratio of nano-magnesium oxide to silicon powder is optimized, which helps to increase the total amount of nano-magnesium oxide loaded on the surface of basalt fiber, thereby improving the bonding effect between the filling fiber and the surrounding mineral particles and enhancing the crack resistance of the green body.

[0016] Preferably, the red mud has a magnesium oxide content of 1.2-3.3%.

[0017] By adopting the above technical solution, the magnesium oxide content of red mud was optimized. When the red mud contains a certain amount of magnesium oxide, the magnesium oxide can combine with the siliceous aluminum components under calcination conditions to form cordierite, which helps to improve the crack resistance of the green body.

[0018] Preferably, the red mud has a magnesium oxide content of 2.1-3.3%.

[0019] By adopting the above technical solution, the magnesium oxide content of red mud was optimized, which helps to improve the crack resistance of the green body.

[0020] Secondly, this application provides a preparation process for a negative ion health cup, which adopts the following technical solution.

[0021] A preparation process for a negative ion health cup includes the following steps:

[0022] (1) Montmorillonite, diatomite, quartz sand, red mud, andalusite, maifanite, diopside, calcite, strontium carbonate, dolomite, and negative oxygen ion powder are mixed and then dry ball milled to obtain powder.

[0023] (2) Mix the powder, filler fiber and water and let it stand to age to obtain a blank. Add the blank into a mold and press it to form a green blank.

[0024] (3) Dry the green body, then dry and bisque-fire the green body to obtain the body. Coat the surface of the body with a mixture of glaze and negative oxygen ion powder. After drying and glazing, the negative oxygen ion health cup is obtained.

[0025] By adopting the above technical solution, this application first prepares powder, then mixes the powder, filler fiber, and water, and ages the mixture to allow the moisture to further diffuse, resulting in a blank with a certain degree of plasticity. Subsequently, this application further presses the blank into a body, and uses glaze to coat the negative ion powder onto the surface of the body, obtaining a green body. After firing the green body into teacups and teapots, a negative ion health cup is obtained.

[0026] Preferably, the raw material also includes auxiliary materials, which are mixed with powder, filling fiber and water in step (2) of preparing the negative ion health cup. The auxiliary materials include zircon sand, and the amount of zircon sand is 1-10% of the weight of quartz sand.

[0027] By adopting the above technical solution, zircon sand can be decomposed into monoclinic zirconium dioxide particles and a siliceous liquid phase with a certain viscosity under calcination conditions. The siliceous liquid phase is mainly distributed between the monoclinic zirconium dioxide particles, which makes the combination of monoclinic zirconium dioxide and siliceous liquid phase have a certain plasticity. It can absorb stress through plastic deformation, which helps to reduce residual stress in the billet and improve the crack resistance of the billet.

[0028] Preferably, the amount of zircon sand used is 6-10% of the weight of quartz sand.

[0029] By adopting the above technical solution, the amount of zircon sand used was optimized, which helps to improve the crack resistance of the billet.

[0030] Preferably, the auxiliary material also includes aluminum titanate, wherein the amount of aluminum titanate is 8-18% of the weight of dolomite.

[0031] By adopting the above technical solution, aluminum titanate can form a composite material with a lower coefficient of thermal expansion (relative to cordierite) with cordierite under calcination conditions. Therefore, adding aluminum titanate to the formulation system of this application can improve the crack resistance of the green body to a certain extent.

[0032] Preferably, the amount of aluminum titanate used is 14-18% of the weight of dolomite.

[0033] By adopting the above technical solution, the amount of aluminum titanate used was optimized, which helps to fully improve the crack resistance of the billet.

[0034] In summary, this application has the following beneficial effects:

[0035] 1. This application improves the ceramic material formulation system. By adopting the scheme of this application, not only can thermal stress be absorbed, but the coefficient of thermal expansion of the body can also be reduced, and the resistance to thermal stress can be improved. This results in teacups and teapots with good crack resistance, reducing the possibility of cracking during glaze firing and helping to improve the product yield. Simultaneously, due to the addition of negative ion powder, the resulting health-preserving cups possess the function of promoting the generation of negative ions, thus exerting certain health-preserving effects.

[0036] 2. In this application, zircon sand is preferred as an auxiliary material. Under calcination conditions, zircon sand can decompose into monoclinic zirconium dioxide particles and a siliceous liquid phase with a certain viscosity. The combination of the two can absorb thermal stress through plastic deformation, which helps to improve the crack resistance of the billet. Detailed Implementation

[0037] The present application will be further described in detail below with reference to the embodiments, preparation examples and comparative examples. The raw materials involved in the present application can all be obtained commercially.

[0038] Preparation example of filling fiber

[0039] The following explanation uses Preparation Example 1 as an example.

[0040] Preparation Example 1

[0041] In this preparation example, the filling fiber was prepared according to the following method:

[0042] (1) Add nano-magnesium oxide, silicon powder and sodium hydroxide to water and mix and heat to obtain magnesium-containing silica sol with pH 10, for later use; calcine continuous basalt fibers to remove oil, and then cut and bundle them to obtain basalt fiber bundles for later use; in this step, the weight ratio of nano-magnesium oxide to silicon powder is 1:1, and the weight ratio of silicon powder to water is 1:20.

[0043] (2) The basalt fiber bundles were immersed in magnesium silica sol and subjected to ultrasonic treatment for 1 hour. Then, the pH of the magnesium silica sol was adjusted to 14 using sodium hydroxide to cause flocculation. The basalt fiber bundles were then removed and dried. After being cut again, the filling fibers were obtained.

[0044] As shown in Table 1, the difference between preparation examples 1-5 lies in the different weight ratios of nano-magnesium oxide and silicon powder.

[0045] Table 1. Weight ratio of nano-magnesium oxide to silicon powder

[0046]

[0047]

[0048] Example

[0049] Examples 1-5

[0050] The following description uses Example 1 as an example.

[0051] Example 1

[0052] This embodiment provides a negative ion health cup, comprising a body and a glaze layer. The body is made by firing a green body, which is formed by pressing raw material. The raw material includes powder with an average particle size of 3.5 μm and filler fibers as described in Preparation Example 1. The filler fibers have an average diameter of 8.4 μm and an average length of 25 mm, and the amount of filler fibers is 1% of the weight of the powder. The powder is made from the following raw materials: 27 kg of montmorillonite, 18 kg of diaspore, 12 kg of quartz sand, 8 kg of red mud, 13 kg of andalusite, 6 kg of maifanite, 7 kg of diopside, 5 kg of calcite, 3 kg of strontium carbonate, 14 kg of dolomite, and 5.4 kg of negative ion powder. The magnesium oxide content (mass fraction) of the red mud is 1.2%. The glaze layer is formed by firing a glaze applied to the surface of the body. The glaze is Jun glaze, and the glaze contains 2.5% by mass of negative ion powder (1200 mesh).

[0053] This embodiment also provides a preparation process for a negative ion health cup, including the following steps:

[0054] (1) Montmorillonite, diatomite, quartz sand, red mud, andalusite, maifanite, diopside, calcite, strontium carbonate, dolomite, and negative oxygen ion powder are mixed and then dry ball milled to obtain powder.

[0055] (2) Mix the powder, filler fiber and water and let it stand for aging to obtain a blank. Put the blank into a mold and press it to form a green blank. In this step, the weight ratio of water to powder is 1:3.

[0056] (3) The green body is dried at 150℃, then calcined at 1470℃ for 2.5h at a heating rate of 4℃ / min, and then the product is calcined at a rate of 6℃ / min and then cooled to 20℃ to obtain the green body. The glaze is applied to the surface of the green body, and the temperature is increased from 20℃ to 900℃ at a rate of 4℃ / min. After holding at the temperature for 1h, the temperature is increased to 1200℃ at a rate of 4℃ / min, and then cooled to 20℃ at a rate of 6℃ / min to obtain the negative ion health cup.

[0057] As shown in Table 2, the main difference between Examples 1-5 lies in the different raw material ratios of the billets.

[0058] Table 2 Raw material ratio of billet

[0059]

[0060]

[0061] Examples 6-9

[0062] As shown in Table 3, the difference between Examples 6-9 and Example 5 is that the preparation methods of the filling fibers are different.

[0063] Table 3 Examples of filling fiber preparation

[0064] sample Example 5 Example 6 Example 7 Example 8 Example 9 Preparation Example Preparation Example 1 Preparation Example 2 Preparation Example 3 Preparation Example 4 Preparation Example 5

[0065] Examples 10-13

[0066] As shown in Table 4, the difference between Embodiments 10-13 and Example 9 is that the magnesium oxide content (mass fraction) of the red mud is different.

[0067] Table 4. Magnesium Oxide Content in Red Mud

[0068] sample Example 9 Example 10 Example 11 Example 12 Example 13 Magnesium oxide / % 1.2 1.7 2.1 2.6 3.3

[0069] Example 14

[0070] The difference between this embodiment and embodiment 13 is that the components of the blank also include auxiliary materials. In step (2) of preparing the negative oxygen ion health cup, the auxiliary materials are mixed together with powder, filling fiber and water. The auxiliary materials include zircon sand with a fineness modulus of 2.2. The amount of zircon sand is 1% of the weight of quartz sand.

[0071] As shown in Table 5, the difference between Examples 14-18 is that the percentage of zircon sand used relative to the weight of quartz sand (hereinafter referred to as zircon sand percentage) is different.

[0072] Table 5. Proportion of Zircon Sand

[0073]

[0074] Example 19

[0075] The difference between this embodiment and Embodiment 8 is that the excipients also include aluminum titanate with an average particle size of 3.5 μm, and the amount of aluminum titanate used is 8% of the weight of dolomite.

[0076] As shown in Table 6, the difference between Examples 19-23 is that the percentage of aluminum titanate used relative to the weight of dolomite (hereinafter referred to as aluminum titanate percentage) is different.

[0077] Table 6. Proportion of Aluminum Titanate

[0078]

[0079] Comparative Example

[0080] Comparative Example 1

[0081] This comparative example provides a negative ion ceramic cup, comprising a body and a glaze layer. The body is made from green clay, which is formed by pressing raw material with water. The raw material is a powder with an average particle size of 3.5 μm. The powder is made from the following raw materials: 27 kg montmorillonite, 18 kg diaspore, 12 kg quartz sand, 8 kg red mud, 13 kg andalusite, 6 kg maifanite, 7 kg diopside, 5 kg calcite, and 3 kg strontium carbonate. The magnesium oxide content (mass fraction) of the red mud is 0.01%. The glaze layer is formed by coating the surface of the body with glaze and firing it. The glaze contains 2.5% negative ion powder by mass.

[0082] This comparative example also provides a preparation process for a negative ion health cup, including the following steps:

[0083] (1) Montmorillonite, diatomite, quartz sand, red mud, andalusite, maifanite, diopside, calcite, strontium carbonate, dolomite, and negative oxygen ion powder are mixed and then dry ball milled to obtain powder.

[0084] (2) Mix the powder, filler fiber and water and let it stand for aging to obtain a blank. Put the blank into a mold and press it to form a green blank. In this step, the weight ratio of water to powder is 1:3.

[0085] (3) The green body is dried at 150℃, then calcined at 1470℃ for 2.5h at a heating rate of 4℃ / min, and then the product is calcined at a rate of 6℃ / min and then cooled to 20℃ to obtain the green body. The glaze is applied to the surface of the green body, and the temperature is increased from 20℃ to 900℃ at a rate of 4℃ / min. After holding at the temperature for 1h, the temperature is increased to 1200℃ at a rate of 4℃ / min, and then cooled to 20℃ at a rate of 6℃ / min to obtain the ceramic cup.

[0086] Comparative Example 2

[0087] The difference between this comparative example and Example 1 is that the raw materials for the powder do not include dolomite.

[0088] Comparative Example 3

[0089] The difference between this comparative example and Example 1 is that the filler fiber is replaced with basalt fiber, which has been treated by burning to remove oil and has an average diameter of 8.4 μm and an average length of 25 mm.

[0090] Performance testing methods

[0091] I. Crack resistance

[0092] Test method:

[0093] Experimental grouping: Each example or comparative example was set as a group, for a total of 26 groups, and the blanks of each group were selected for subsequent sample preparation.

[0094] Sample preparation: The billet was pressed into strip-shaped samples with dimensions of 30mm×7mm×4mm under isostatic pressing conditions of 250MPa. The samples were calcined at 1470℃ for 2.5h at a heating rate of 4℃ / min, and then the calcined product was cooled to 20℃ at a rate of 6℃ / min to obtain the samples.

[0095] Experimental operation steps:

[0096] 1000 samples were heated from 20°C to 900°C at a rate of 4°C / min, held at that temperature for 1 hour, and then heated to 1200°C at a rate of 4°C / min. The samples were then cooled to 20°C at a rate of 6°C / min. The cracking of the samples was then checked, and the number of samples that cracked out of the 1000 samples was recorded. Each group of samples was operated according to the above steps.

[0097] Data processing:

[0098] After the test, the proportion of cracked samples in the 1000 samples was calculated and the result was recorded as the cracking rate. Then, with the cracking rate of Comparative Example 1 as a reference, the ratio between the cracking rate of each embodiment and comparative example and the cracking rate of Comparative Example 1 was calculated and the ratio was recorded as the relative cracking rate. The results are expressed as a percentage, as shown in Table 7.

[0099] II. Thermal expansion coefficient experiment grouping: Each example or comparative example is set as a group, and the blanks of each group are selected for subsequent sample preparation.

[0100] Sample preparation: The blank was pressed into a cuboid sample with dimensions of 5mm×5mm×25mm under isostatic pressing at 250MPa. The sample was calcined at 1470℃ for 2.5h at a heating rate of 4℃ / min. Then the product was calcined at a rate of 6℃ / min and cooled to 20℃ to obtain the sample.

[0101] The thermal expansion coefficient of the samples was tested between 40-1200℃ according to GB / T 16535-2008 Test Method for Linear Thermal Expansion Coefficient of Fine Ceramics (Pump Method). Then, the ratio between the thermal expansion coefficient of the samples of each embodiment and comparative example and the thermal expansion coefficient of the sample of Comparative Example 1 was calculated. This ratio was recorded as the relative thermal expansion coefficient. The results are expressed as a percentage, as shown in Table 7.

[0102] Table 7 Relative cracking rate and coefficient of thermal expansion

[0103]

[0104]

[0105] III. Tea Brewing Test

[0106] Three types of tea were used as samples for brewing tests: High Mountain Fragrant Tea (from Suichang, Zhejiang), Tieguanyin (from Anxi, Fujian), and Qimen Black Tea (from Qimen, Anhui). The tea-to-water ratio was 1:8. Boiling water was used for brewing, and the tea leaves were filtered out when the tea water temperature naturally cooled to 45℃. The remaining tea water was poured into the health cups of Examples 1-5 and the ceramic cup of Comparative Example 1, respectively. After standing for 30 minutes, the color of the tea water was compared with that of Comparative Example 1. The number of "+" signs was used to represent the color depth of the tea water relative to Comparative Example 1. "+" means that there is no significant difference in color depth from that of Comparative Example 1, "++" means that the color is lighter than that of Comparative Example 1, and "+++" means that the color is significantly lighter than that of Comparative Example 1. The results are shown in Table 8.

[0107] IV. Negative Oxygen Ion Concentration Test

[0108] The detection end of the negative oxygen ion concentration tester was placed at the mouth of the health cups in Examples 1-5 and the ceramic cup in Comparative Example 1 to detect the concentration of negative oxygen ions. The results are shown in Table 8.

[0109] Table 8 Results of tea brewing test and negative oxygen ion concentration test

[0110]

[0111] As can be seen from Examples 1-5 and Comparative Example 1, and Table 7, the relative cracking rates measured in Examples 1-5 are all lower than those in Comparative Example 1, indicating that the blank of this application has a lower coefficient of thermal expansion and better crack resistance, and the health cup made according to the scheme of this application has a higher yield.

[0112] Combining Example 1 and Comparative Example 2 with Table 7, it can be seen that Comparative Example 2, in the absence of dolomite, has a higher relative cracking rate and relative coefficient of thermal expansion, indicating that it is difficult to fully improve the crack resistance of the blank by filling with fibers alone.

[0113] Combining Example 1 and Comparative Example 3 with Table 7, it can be seen that in Comparative Example 3, when basalt fiber was used to replace the crack-resistant fiber, the measured relative cracking rate and relative coefficient of thermal expansion were both higher. This indicates that when the fiber surface lacks nano-magnesium oxide, the bonding effect between the fiber and the surrounding mineral particles is poor, making it difficult to fully improve the crack resistance of the preform.

[0114] As can be seen from Examples 1-5, Comparative Examples 1-3, and Table 7, by adopting the solution of this application, not only can the residual stress in the green body be reduced, but also the coefficient of thermal expansion of the green body can be lowered, and the resistance of the green body to thermal stress can be improved, thereby giving the green body good crack resistance. The calcination conditions set in the above-mentioned testing process can reflect the cracking of the green body under glaze firing conditions. The decrease in cracking rate indicates that the solution of this application reduces the possibility of cracking of the green body during glaze firing, thus helping to improve the yield of health cup products.

[0115] As can be seen from Examples 5-9 and Table 7, increasing the amount of nano-magnesium oxide can improve the distribution density of nano-magnesium oxide in magnesium silica sol, allowing the filler fiber surface to carry more nano-magnesium oxide, improving the bonding effect between the filler fiber and the surrounding mineral particles, and enhancing the crack resistance of the body. Therefore, the health cup product is less likely to crack during glaze firing.

[0116] As can be seen from Examples 9-13 and Table 7, when the magnesium oxide content in the red mud is 1.2-3.3%, it has a certain effect on improving the crack resistance of the green body. When the magnesium oxide content in the red mud is 2.1-3.3%, the crack resistance of the green body is relatively good, which helps to improve the yield of health cup products.

[0117] Combining Examples 13 and 14-18 with Table 7, it can be seen that the relative cracking rates measured in Examples 14-18 are all lower than those in Example 13. This indicates that after the zircon sand decomposes under calcination conditions to produce monoclinic zirconium dioxide particles and a siliceous liquid phase, the siliceous liquid phase fills the spaces between the monoclinic zirconium dioxide particles, giving the composite of monoclinic zirconium dioxide and the siliceous liquid phase a certain degree of plasticity. This allows it to absorb stress through plastic deformation, helping to reduce residual stress in the green body and improve its crack resistance. When the amount of zircon sand is 6-10% of the weight of quartz sand, the crack resistance of the green body is relatively good, which helps to improve the yield of the health-preserving cup product.

[0118] As can be seen from Examples 18, 19-23 and Table 7, the relative cracking rate and relative coefficient of thermal expansion measured in Examples 19-23 are lower than those in Example 18. This indicates that aluminum titanate forms a composite material with a lower coefficient of thermal expansion with cordierite under calcination conditions, which improves the crack resistance of the green body and helps to increase the yield of health cup products.

[0119] Based on Examples 1-5, Comparative Example 1, and Table 8, it can be seen that for different types of tea, the tea color observed in the health-preserving cups of Examples 1-5 is lighter than that of the tea in Comparative Example 1. Furthermore, detection of negative oxygen ion concentration revealed that the concentration of negative oxygen ions at the rim of the health-preserving cups of Examples 1-5 was consistently above 10000 g / cm³.3 The above figures are significantly higher than those in Comparative Example 1. Furthermore, as the total amount of negative oxygen ion powder contained in the teapot increases, the color of the tea tends to become even lighter, while the concentration of negative oxygen ions at the rim of the cup tends to increase further.

[0120] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A negative ion health cup, characterized in that, The product comprises a body and a glaze layer. The body is formed by firing a green body. The green body consists of powder and filler fibers, with the filler fibers accounting for 1-5% of the powder weight. The powder comprises the following components by weight: 27-31 parts montmorillonite, 18-20 parts diaspore, 12-15 parts quartz sand, 8-10 parts red mud, 13-15 parts andalusite, 6-8 parts maifanite, 7-9 parts diopside, 5-8 parts calcite, 3-6 parts strontium carbonate, 14-18 parts dolomite, and 1.8-5.8 parts negative oxygen ion powder. The filler fibers are basalt fibers with nano-magnesium oxide loaded on their surface. The red mud has a magnesium oxide content of 1.2-3.3%. The filler fibers are prepared according to the following method: (1) Add nano-magnesium oxide, silicon powder and sodium hydroxide to water and mix and heat to obtain magnesium-containing silica sol for later use; calcine continuous basalt fibers to remove oil, and then cut and bundle them to obtain basalt fiber bundles for later use; the weight ratio of nano-magnesium oxide to silicon powder is (2.6-3.8):1; (2) The basalt fiber bundles are immersed in magnesium silicate sol and ultrasonically treated. Then sodium hydroxide is added to cause the magnesium silicate sol to flocculate. The basalt fiber bundles are then removed and dried. After being cut again, the filling fibers are obtained.

2. The negative ion health cup according to claim 1, characterized in that, The red mud has a magnesium oxide content of 2.1-3.3%.

3. The preparation process of the negative ion health cup according to any one of claims 1-2, characterized in that, Includes the following steps: (1) Montmorillonite, diatomite, quartz sand, red mud, andalusite, maifanite, diopside, calcite, strontium carbonate, dolomite, and negative oxygen ion powder are mixed and then dry ball milled to obtain powder. (2) Mix the powder, filler fiber and water and let it stand for aging to obtain a blank. Add the blank to the mold and press it to form a green blank. (3) Dry the green body, then dry and bisque-fire the green body to obtain the body, coat the surface of the body with a mixture of glaze and negative oxygen ion powder, and obtain the negative oxygen ion health cup after drying and glazing.

4. The preparation process of the negative ion health cup according to claim 3, characterized in that, The raw material also includes auxiliary materials, which are mixed with powder, filling fiber and water in step (2) of preparing the negative oxygen ion health cup. The auxiliary materials include zircon sand, and the amount of zircon sand is 1-10% of the weight of quartz sand.

5. The preparation process of the negative ion health cup according to claim 4, characterized in that, The amount of zircon sand used is 6-10% of the weight of the quartz sand.

6. The preparation process of the negative ion health cup according to claim 4, characterized in that, The auxiliary materials also include aluminum titanate, and the amount of aluminum titanate used is 8-18% of the weight of dolomite.

7. The preparation process of the negative ion health cup according to claim 6, characterized in that, The amount of aluminum titanate used is 14-18% of the weight of dolomite.

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