Health-preserving ceramic mud material with negative ion releasing function and preparation method thereof

Abstract

The application provides a health-care ceramic mud material with a negative ion releasing function and a preparation method thereof, and belongs to the technical field of ceramic materials. The ceramic mud material comprises the following raw material components: Xichong clay 30-40 parts, Laoguang kiln clay 35-40 parts, Yangshan clay 20-30 parts, Liji clay 20-40 parts, quartz 1-3 parts, bentonite 2-3 parts, spodumene 0-5 parts, potassium feldspar 0-10 parts, cordierite 0-20 parts, mullite 0-10 parts, fused quartz 0-20 parts, and composite negative ion generator 2-5 parts. The mud material is prepared through process steps of batching, ball milling, pressure filtration and mechanical kneading. The finished product prepared from the mud material has the basic properties of ceramic products, and has certain health-care functions, such as activating water quality, inhibiting bacteria and preserving freshness, accelerating the aging speed of wine, making the taste of wine sweet and mellow, improving the quality of wine, etc.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ceramic materials, and particularly relates to a health-care ceramic clay material with a negative ion releasing function and a preparation method thereof. BACKGROUND

[0002] Negative ions are a kind of far infrared radiation material which is extremely beneficial to human health, and the optimal absorption wavelength is 9.6 μm, while the far infrared radiation wavelength range of the negative ion mineral crystal is between 2-18 μm. The radiation power emission density is slightly high, which is 0.04 w / cm 2 . These data fully prove that the far infrared radiation of the negative ion mineral crystal is excellent in coordination with the human body and can be completely absorbed by the human body. Generally, a person needs about 13 billion negative ions per day, but our living room, office and other environments can only provide about 1-20 billion, and this huge gap between supply and demand often leads to respiratory diseases such as pneumonia and bronchitis. In addition, the negative ions in the air can reduce the pollutants in the atmosphere, such as nitrogen oxides, active oxygen (oxygen free radicals) generated by cigarettes, reduce the harm of excessive active oxygen to the human body, neutralize the positively charged air dust, and make it chargeless and settle, thereby purifying the air. Our domestic water contains a certain amount of dissolved pollutants, such as high fluorine, disinfection by-products, etc. Far infrared ceramic can filter out various harmful substances in water and release a variety of trace elements beneficial to the human body. Far infrared rays can activate water quality, enhance the permeability, solubility and metabolic capacity of water, and have a significant effect on improving human health.

[0003] In daily life, life utensils are most closely contacted with the human body, such as sand pots, cup utensils, etc., which are usually fired from clay. Therefore, developing a health-care ceramic clay material with a negative ion releasing function and a preparation method thereof for producing multipurpose life utensils is a technical problem to be solved at present. SUMMARY

[0004] The present application aims to provide a health-care ceramic clay material with a negative ion releasing function and a preparation method thereof, which can solve the technical problems of the prior art, such as no negative ion releasing function, narrow sintering temperature range, poor high-temperature resistance, etc.

[0005] In order to achieve the above-mentioned application purposes, the present application provides the following technical solutions:

[0006] The present application provides a health-care ceramic clay material with a negative ion releasing function, which is prepared from raw materials containing the following mass fractions:

[0007] Xichong clay 30-40 parts, Laoguang kiln clay 35-40 parts, Yangshan clay 20-30 parts, Liji clay 20-40 parts, quartz 1-3 parts, bentonite 2-3 parts, spodumene 0-5 parts, potassium feldspar 0-10 parts, cordierite 0-20 parts, mullite 0-10 parts, fused quartz 0-20 parts, and composite negative ion generator 2-5 parts.

[0008] Further, the preparation method of the composite negative ion generator is:

[0009] The tourmaline, opal, titanium dioxide and nanometer silicon dioxide are mixed and ball milled to obtain a mixture, and the mixture is spray dried to obtain a mixed powder;

[0010] The mixed powder is coated with a sodium silicate solution, and then calcined and solidified and ground to obtain the composite negative ion generator.

[0011] Further, the mass ratio of the tourmaline, opal, titanium dioxide and nanometer silicon dioxide is 10-20:10-20:1-5:5-10.

[0012] Further, the rotation speed of the ball milling is 300-700 rpm, and the ball milling time is 4-6 h.

[0013] Further, the inlet temperature of the spray drying is 180-220°C, and the outlet temperature is 80-90°C.

[0014] Further, the concentration of the sodium silicate solution is 8-10 wt%, and the amount of the sodium silicate solution is 15-20% of the mass of the mixed powder.

[0015] Further, the calcination and solidification temperature is 300-600°C, and the calcination and solidification time is 0.5-3 h.

[0016] The application also provides a preparation method of a health-care ceramic mud material with negative ion releasing function, comprising the following steps:

[0017] 1) Ball milling and mixing other raw materials except the composite negative ion generator to obtain a mixture;

[0018] 2) dispersing the composite negative ion generator in the mixture, and then adding water to obtain a slurry;

[0019] 3) pressure filtering the slurry, and then kneading and vacuum exhausting under mechanical stirring to obtain the health-care ceramic mud material with negative ion releasing function.

[0020] Further, in step 1), the ball milling and mixing rotation speed is 500-700 rpm, the ball milling and mixing time is 1-2 h, and the ball-to-material ratio is 3-5:1.

[0021] Further, the solid content of the slurry is 50-65%;

[0022] The rotating speed of the mechanical stirring is 300-500 rpm.

[0023] The beneficial effects of the present application are:

[0024] The prepared composite negative ion generator is compounded by multiple components, effectively combines the advantages of multiple components, has the ability of negative ion release; the sodium silicate coating can isolate the powder from the external environment, prevent the oxidation and hydrolysis of the active components such as tourmaline, and can reduce the agglomeration between particles in the high-temperature sintering process after sodium silicate coating, and maintain the dispersibility.

[0025] The present application mixes the raw material components to obtain a slurry, and the slurry is subjected to mechanical kneading and vacuum exhaust treatment, which not only can avoid particle agglomeration and remove bubbles, but also can make the obtained clay achieve the effect of "soft but not sticky, tough but not scattered".

[0026] According to the physical and chemical structure characteristics of negative ion minerals, the present application develops a basic clay material combined with the physicochemical properties of local raw materials in Dabie Mountain. The clay material has no any toxic side effects, can release trace elements beneficial to human body, and has a long-lasting function. The tea cup prepared from the clay material can purify and activate water quality, make the water sweet and odorless, and has a certain bacteriostatic effect; if used for wine bottles, it can accelerate the aging speed of wine, make the wine sweet and non-stimulating, and improve the quality of wine; if used for heat-resistant sand pots, it can promote the sintering of sand pots, reduce the thermal expansion coefficient of sand pots, make the sand pots can resist dry burning to 450 DEG C, and do not burst when put into 20 DEG C cold water; the application of the present application technology widens the application field of negative ion generator, and better benefits the public. DETAILED DESCRIPTION

[0027] The present application provides a health-preserving ceramic clay material with negative ion release function, which is prepared from raw materials comprising the following mass fractions:

[0028] Xichong clay 30-40 parts, Laogang kiln clay 35-40 parts, Yangshan clay 20-30 parts, Liji clay 20-40 parts, quartz 1-3 parts, bentonite 2-3 parts, spodumene 0-5 parts, potassium feldspar 0-10 parts, cordierite 0-20 parts, mullite 0-10 parts, fused quartz 0-20 parts, and composite negative ion generator 2-5 parts.

[0029] In the present application, the content of the Xichong clay is preferably 32-38 parts, and further preferably 34-36 parts, according to the mass fraction.

[0030] In the present application, the content of the Laogang kiln clay is preferably 36-38 parts, and further preferably 37 parts, according to the mass fraction.

[0031] In the present application, the content of the Yangshan soil is preferably 22-28 parts by mass, and further preferably 24-26 parts by mass.

[0032] In the present application, the content of the Liji soil is preferably 25-35 parts by mass, and further preferably 28-32 parts by mass.

[0033] In the present application, the content of the quartz is preferably 2 parts by mass.

[0034] In the present application, the content of the bentonite is preferably 2.5 parts by mass.

[0035] In the present application, the content of the spodumene is preferably 2-4 parts by mass, and further preferably 3 parts by mass.

[0036] In the present application, the content of the potassium feldspar is preferably 2-8 parts by mass, and further preferably 4-6 parts by mass.

[0037] In the present application, the content of the cordierite is preferably 12-18 parts by mass, and further preferably 14-16 parts by mass.

[0038] In the present application, the content of the mullite is preferably 6-8 parts by mass, and further preferably 7 parts by mass.

[0039] In the present application, the content of the fused quartz is preferably 12-18 parts by mass, and further preferably 14-16 parts by mass.

[0040] In the present application, the content of the composite negative ion generator is preferably 3-4 parts by mass, and further preferably 3.5-4 parts by mass.

[0041] In the present application, the preparation method of the composite negative ion generator is as follows:

[0042] The tourmaline, opal, titanium dioxide and nano-silicon dioxide are mixed and ball milled to obtain a mixture, and the mixture is spray dried to obtain a mixed powder;

[0043] The mixed powder is coated with a sodium silicate solution, and then calcined and solidified and ground to obtain the composite negative ion generator.

[0044] In the present application, the mass ratio of the tourmaline, opal, titanium dioxide and nano-silicon dioxide is 10-20:10-20:1-5:5-10, preferably 12-18:12-18:2-4:6-9, and further preferably 14-16:14-16:3-4:8-9.

[0045] In the present application, the rotation speed of the ball milling is 300-700 rpm, preferably 400-600 rpm; the ball milling time is 4-6 h, preferably 5 h.

[0046] In the present application, the inlet temperature of the spray drying is 180-220℃, preferably 200℃; the outlet temperature is 80-90℃, preferably 88℃.

[0047] In the present application, the concentration of the sodium silicate solution is 8-10 wt%, preferably 10 wt%; the amount of the sodium silicate solution is 15-20% of the mass of the mixed powder, preferably 17 wt%.

[0048] In the present application, the calcination curing temperature is 300-600℃, preferably 400-500℃, further preferably 450-500℃; the calcination curing time is 0.5-3 h, preferably 1-2 h.

[0049] In the present application, the chemical composition of part of the raw materials of the health-preserving ceramic mud material with negative ion releasing function is as shown in Table 1:

[0050] Table 1 Chemical composition of mud raw materials (unit: wt%)

[0051] SiO2 Al2O3 Fe2O3 TiO2 CaO MgO [K2O] Na2O TL Xichong clay 57.27 19.83 6.56 0.68 2.22 2.38 2.49 0.97 7.60 Laojiangyao clay 62.81 19.37 5.88 0.66 0.74 0.83 1.71 0.35 7.65 Yangshan clay 60.1 25.64 2.07 0.99 0.67 0.42 1.77 0.27 8.07 Liji clay 77.71 13.82 0.57 0.19 0.49 0.16 0.39 3.71 2.96

[0052] Note: TL represents other unavoidable volatile impurity components, i.e. loss on ignition.

[0053] The present application also provides a preparation method of a health-preserving ceramic mud material with negative ion releasing function, comprising the following steps:

[0054] 1) Ball milling and mixing other raw materials except for the composite negative ion generator to obtain a mixed material;

[0055] 2) dispersing the composite negative ion generator in the mixed material, and then mixing with water to obtain a slurry;

[0056] 3) pressure filtering the slurry, and then kneading and vacuum exhausting under mechanical stirring to obtain the health-preserving ceramic mud material with negative ion releasing function.

[0057] In the present application, in step 1), the rotation speed of the ball milling and mixing is 500-700 rpm, preferably 600 rpm; the ball milling and mixing time is 1-2 h, and the ball-material ratio is 3-5:1, preferably 4:1.

[0058] In the present application, the fineness of the mixed material is 325 mesh, and the sieve residue amount is 0.5-0.8%.

[0059] In the present application, the solid content of the slurry is 50-65%, preferably 55-60%;

[0060] The rotating speed of the mechanical stirring is 300-500 rpm, preferably 400 rpm.

[0061] In the present application, the moisture content of the clay is 20-25%, preferably 22-23%.

[0062] In the present application, the clay can be made into sand pots, wine bottles, tea cups, etc. The clay is kneaded into a shape, and then fired at a temperature of 1180-1300℃.

[0063] In the present application, the sand pot, wine bottle, tea cup made of the clay has an anion emission amount of 100-300 / cm 3 .

[0064] The technical solutions provided by the present application will be described in detail below in conjunction with the examples, but they should not be understood as limiting the scope of protection of the present application.

[0065] Example 1

[0066] The health-care ceramic clay with negative ion releasing function has the following ingredients as shown in Table 2:

[0067] Table 2: Sand pot ingredients (unit: mass parts)

[0068]

[0069] Preparation of the composite negative ion generator:

[0070] The tourmaline, opal, titanium dioxide and nano silicon dioxide are mixed in a mass ratio of 20:20:5:10, and then ball-milled at 500 rpm for 5 h to obtain a mixture. The mixture is spray-dried to obtain a mixed powder. The inlet temperature of the spray-drying is set to 200℃, and the outlet temperature is set to 90℃.

[0071] The mixed powder is coated with a 10wt% sodium silicate solution (17wt% of the mixed powder), and then calcined and solidified at 400℃ and ground to obtain the composite negative ion generator.

[0072] Preparation method of the health-care ceramic clay with negative ion releasing function:

[0073] The above raw materials (except the composite negative ion generator) are mixed and ball-milled at 600 rpm and a ball-to-material ratio of 4:1 for 1.5 h to obtain a mixture;

[0074] The composite negative ion generator is dispersed in the mixture, and then water is added and mixed to obtain a slurry with a solid content of 55%; the slurry is pressure-filtered, and then kneaded and vacuum degassed under mechanical stirring (500 rpm) to obtain a health-care ceramic mud material with a negative ion release function, with a water content of 22%.

[0075] The obtained mud material is shaped and fired at 1180°C, and after firing, the negative ion emission amount thereof is 300 / cm 3 .

[0076] Example 2

[0077] The health-care ceramic mud material with a negative ion release function has the following ingredients according to Table 3:

[0078] Table 3: Ingredients of purple sand pottery water cup (unit: mass parts)

[0079]

[0080] The composite negative ion generator is prepared according to the method of Example 1.

[0081] The health-care ceramic mud material with a negative ion release function is prepared according to the method of Example 1, with a water content of 23%.

[0082] The obtained mud material is shaped and fired at 1190°C, and after firing, the negative ion emission amount thereof is 270 / cm 3 .

[0083] Example 3

[0084] The health-care ceramic mud material with a negative ion release function has the following ingredients according to Table 4:

[0085] Table 4: Ingredients of stoneware (unit: mass parts)

[0086]

[0087] The composite negative ion generator is prepared according to the method of Example 1.

[0088] The health-care ceramic mud material with a negative ion release function is prepared according to the method of Example 1, with a water content of 25%.

[0089] The obtained mud material is shaped and fired at 1220°C, and after firing, the negative ion emission amount thereof is 180 / cm 3 .

[0090] Example 4

[0091] The health-care ceramic mud material with a negative ion release function has the following ingredients according to Table 5:

[0092] Table 5: Ingredients of sand pot (unit: mass parts)

[0093]

[0094]

[0095] Preparation of the composite negative ion generator:

[0096] The tourmaline, opal, titanium dioxide and nanometer silicon dioxide were mixed in a mass ratio of 20:15:5:5, ball-milled at 500 rpm for 5 h, and the mixture was obtained. The mixture was spray dried to obtain a mixed powder. The inlet temperature of the spray drying was set to 200°C, and the outlet temperature was set to 90°C.

[0097] The mixed powder was coated with a 9wt% sodium silicate solution (17wt% of the mixed powder), and then calcined and solidified at 500°C and ground to obtain the composite negative ion generator.

[0098] Preparation method of health-care ceramic mud material with negative ion release function:

[0099] The above raw materials (except the composite negative ion generator) were mixed and ball-milled at 600 rpm and a ball-to-material ratio of 5:1 for 1.5 h to obtain a mixture.

[0100] The composite negative ion generator was dispersed in the mixture, and then mixed with water to obtain a slurry with a solid content of 60%. The slurry was pressure-filtered, and then kneaded and vacuumed under mechanical stirring (500 rpm) to obtain the health-care ceramic mud material with negative ion release function, with a water content of 20%.

[0101] The obtained mud material was shaped and fired at 1250°C. After firing, the negative ion emission amount was 290 / cm 3 .

[0102] Example 5

[0103] The health-care ceramic mud material with negative ion release function was prepared according to the following Table 6:

[0104] Table 6: Sand pot ingredients (unit: mass parts)

[0105]

[0106] Preparation of the composite negative ion generator:

[0107] The tourmaline, opal, titanium dioxide and nanometer silicon dioxide were mixed in a mass ratio of 15:20:5:10, ball-milled at 500 rpm for 5 h, and the mixture was obtained. The mixture was spray dried to obtain a mixed powder. The inlet temperature of the spray drying was set to 200°C, and the outlet temperature was set to 90°C.

[0108] The mixed powder is coated with 10wt% sodium silicate solution (20wt% of the mixed powder) and then calcined and solidified at 500℃ and ground to obtain the composite anion generator.

[0109] Preparation method of health-care ceramic mud with negative ion releasing function

[0110] The above raw materials (except the composite anion generator) are mixed in a ball mill at 600rpm and a ball-to-material ratio of 5:1 for 1.5h to obtain a mixture;

[0111] The composite anion generator is dispersed in the mixture, and then water is added to obtain a slurry with a solid content of 62%; the slurry is pressure-filtered, and then kneaded and vacuumed under mechanical stirring (500rpm) to obtain the health-care ceramic mud with negative ion releasing function, with a water content of 21%.

[0112] The obtained mud is shaped and fired at 1260℃, and the negative ion emission amount after firing is 272 / cm 3 .

[0113] Comparative Example 1

[0114] The raw materials are the same as in Example 1, except that the composite anion generator is replaced by tourmaline powder, and the other preparation steps are the same as in Example 1.

[0115] The obtained mud is shaped and fired at 1180℃, and the negative ion emission amount after firing is 90 / cm 3 .

[0116] Comparative Example 2

[0117] The raw materials are the same as in Example 1, except that the composite anion generator is replaced by tourmaline: opal = 1:1, and the other preparation steps are the same as in Example 1.

[0118] The obtained mud is shaped and fired at 1200℃, and the negative ion emission amount after firing is 120 / cm 3 .

[0119] Comparative Example 3

[0120] The raw materials are the same as in Example 1, except that in the preparation method, all the raw materials and water are mixed to obtain the mud by mechanical mixing.

[0121] The obtained mud is shaped and fired at 1180℃, and the negative ion emission amount after firing is 300 / cm 3 .

[0122] Test Example

[0123] The samples prepared by firing the slips obtained in the examples and comparative examples were subjected to heat resistance (QB / T 1990-2019) and thermal shock resistance (ASTM C554-2021) tests:

[0124] Heat resistance: (after air firing to 300℃ and quenching, no cracking for 3 cycles);

[0125] Thermal shock test: dry the sand pot to (450℃), then quickly immerse it in 20℃ cold water, test for 3 times, record the number of cracks, and the test results are shown in Table 7 below.

[0126] Table 7 Performance test results

[0127]

[0128] As can be seen from the performance test in Table 7, by compounding the negative ion generator and coating with sodium silicate, the examples 1-5 of the present application not only improve the ability of negative ion release, but also avoid the oxidation and decomposition of active ingredients. After coating with sodium silicate, the agglomeration between particles during high temperature sintering can be reduced, the dispersibility is maintained, and no cracks are generated on the surface of the sample prepared. The comparative example 1 and the comparative example 2 use simple components as negative ion generators without sodium silicate coating, the negative ion release capacity decreases significantly, and after firing, the sample surface has micro-cracks, so that the sample cracks during the heat resistance and thermal shock resistance tests. The comparative example 3 uses a conventional stirring mixing method without vacuum exhaust treatment, the slip is not uniformly stirred, resulting in cracks and bubbles in the fired product, the cracking frequency is high during the heat resistance and thermal shock resistance tests, and it does not meet the production requirements.

[0129] The above only describes the preferred embodiments of the present application, and it should be noted that for ordinary skilled persons in the art, several improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A health-preserving ceramic clay with negative ion release function, characterized in that, Prepared from raw materials comprising the following mass fractions: Xichong clay 30-40 parts, Laoji clay 20-40 parts, quartz 1-3 parts, bentonite 2-3 parts, spodumene 2-4 parts, potassium feldspar 2-8 parts, cordierite 12-18 parts, mullite 6-8 parts, fused quartz 12-18 parts, and composite negative ion generator 2-5 parts; The preparation method of the composite negative ion generator is: The tourmaline, opal, titanium dioxide and nano silicon dioxide are mixed and then ball milled to obtain a mixture, and the mixture is spray dried to obtain a mixed powder; The mixed powder is coated with a sodium silicate solution, and then calcined and solidified and ground to obtain the composite negative ion generator; The concentration of the sodium silicate solution is 8-10 wt%, and the amount of the sodium silicate solution is 15-20% of the mass of the mixed powder; The chemical composition of the Xichong clay, in terms of mass percentage, is: SiO2 57.27 wt%, Al2O3 19.83 wt%, Fe2O3 6.56 wt%, TiO2 0.68 wt%, CaO 2.22 wt%, MgO 2.38 wt%, K2O 2.49 wt%, Na2O 0.97 wt%, and TL 7.60 wt%; The chemical composition of the Laoji clay, in terms of mass percentage, is: SiO2 62.81 wt%, Al2O3 19.37 wt%, Fe2O3 5.88 wt%, TiO2 0.66 wt%, CaO 0.74 wt%, MgO 0.83 wt%, K2O 1.71 wt%, Na2O 0.35 wt%, and TL 7.65 wt%; The chemical composition of the Yangshan clay, in terms of mass percentage, is: SiO2 60.1 wt%, Al2O3 25.64 wt%, Fe2O3 2.07 wt%, TiO2 0.99 wt%, CaO 0.67 wt%, MgO 0.42 wt%, K2O 1.77 wt%, Na2O 0.27 wt%, and TL 8.07 wt%; The chemical composition of the Laoji clay, in terms of mass percentage, is: SiO2 62.81 wt%, Al2O3 19.37 wt%, Fe2O3 5.88 wt%, TiO2 0.66 wt%, CaO 0.74 wt%, MgO 0.83 wt%, K2O 1.71 wt%, Na2O 0.35 wt%, and TL 7.65 wt%; 2. The health-maintaining ceramic clay of claim 1, wherein the clay is mixed with a clay having a negative ion releasing function. The mass ratio of the tourmaline, opal, titanium dioxide and nano silicon dioxide is 10-20:10-20:1-5:5-10. 3.The health-care ceramic clay material with a negative ion releasing function according to claim 1 or 2, characterized in that, The rotation speed of the ball milling is 300-700 rpm, and the ball milling time is 4-6 h.

4. The health-maintaining ceramic clay of claim 3, wherein the clay is mixed with a clay having a negative ion releasing function. The inlet temperature of the spray drying is 180-220°C, and the outlet temperature is 80-90°C.

5. The health-maintaining ceramic clay of claim 4, wherein the clay is mixed with a clay having a negative ion releasing function. The calcination and solidification temperature is 300-600°C, and the calcination and solidification time is 0.5-3 h.

6. The method for preparing the health-preserving ceramic clay with negative ion release function according to any one of claims 1 to 5, characterized in that, The method comprises the following steps: The method comprises the following steps: 1) Ball-mixing other raw materials except composite negative ion generator to obtain a mixture; 2) dispersing the composite negative ion generator in the mixture, then adding water to obtain a slurry; 3) filtering the slurry, then kneading and vacuum exhausting under mechanical stirring to obtain a health-care ceramic mud material with negative ion releasing function.

7. The method of claim 6, wherein the health-maintaining ceramic clay is prepared by mixing 0.1 to 1 wt% of the negative ion releasing material with 99 to 99 wt% of the ceramic clay. In the step 1), the rotation speed of ball-mixing is 500-700 rpm, the ball-mixing time is 1-2 h, and the ball-to-material ratio is 3-5:

1.

8. The method of claim 7, wherein the health-maintaining ceramic clay is prepared by mixing 0.1 to 1 wt% of the negative ion releasing material with 99 to 99 wt% of the ceramic clay. The solid content of the slurry is 50-65%; The rotation speed of mechanical stirring is 300-500 rpm.

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