Red glaze porcelain and preparation method thereof
By adjusting the glaze composition and kiln firing parameters, the problems of low yield and serious pollution of traditional Jihong glazed porcelain have been solved, achieving high-quality and environmentally friendly production of Jihong glazed porcelain.
Patent Information
- Application Number
- CN202511451542.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-11
- Publication Date
- 2025-12-12
AI Technical Summary
The traditional firing process of Jihong glaze porcelain has problems such as low yield, unstable color, high energy consumption and serious pollution. In addition, traditional raw material resources are limited and it is difficult to guarantee the consistency of quality.
High-quality Jihong glaze porcelain is made by using a specific ratio of quartz, wollastonite, kaolin, barium carbonate, manganese dioxide, copper oxide, and iron oxide as glaze raw materials, and by precisely controlling the temperature and atmosphere of the kiln and adjusting firing parameters such as heating rate, holding time, and pressure during the reduction stage.
It improves the yield rate of Jihong glaze porcelain, as well as the gloss and uniformity of the glaze, reduces environmental pollution, and satisfies modern people's pursuit of high-quality porcelain and traditional culture.
Smart Images
Figure CN121107703A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of ceramic preparation, and specifically relates to a red glaze porcelain and a preparation method thereof. BACKGROUND
[0002] With the development of social economy and the improvement of people's living standards, the demand for high-quality ceramic products is increasing. Red glaze porcelain occupies an important position in the ceramic market due to its unique color and artistic value. At the same time, environmental protection and energy saving requirements are becoming increasingly stringent, prompting the development of ceramic firing technology towards green and efficient direction.
[0003] The widespread application of automatic control in production provides technical support for the precise control of the ceramic firing process. Through modern technology, the temperature, atmosphere and other parameters of the kiln can be monitored and adjusted in real time, improving the stability of the firing and the yield of finished products. Red glaze porcelain originated in the Ming Dynasty and has a deep historical and cultural heritage. However, traditional firing processes have low yield, unstable color, and other problems. For example, in ancient times, due to the limitations of kiln technology and raw material control, it was difficult to produce red glaze porcelain with uniform color and pure color. Moreover, some raw materials used in traditional processes (such as agate, precious stones, gold, etc.) are limited in resources and difficult to ensure consistent quality.
[0004] Traditional red glaze firing uses charcoal or coal kilns, which are difficult to control in terms of temperature and atmosphere, have high energy consumption and cause serious pollution. When firing with charcoal, the size and direction of the flame are difficult to control accurately, resulting in uneven temperature and atmosphere in the kiln, affecting the presentation of the glaze color. In addition, the waste gas produced by the combustion of charcoal and coal kilns contains a large amount of pollutants such as sulfur dioxide and nitrogen oxides, which puts a lot of pressure on the environment. SUMMARY
[0005] Based on the above technical background, the main purpose of the present application is to provide a red glaze porcelain and a preparation method thereof to overcome the shortcomings of the prior art.
[0006] To achieve the aforementioned purposes, the technical solutions adopted by the present application include: The first aspect of the present application is to provide a red glaze porcelain, which is prepared from a ceramic body and a glaze, and the glaze is prepared from the following raw materials in weight percentage: quartz 10-15%, wollastonite 15-25%, kaolin 8-12%, barium carbonate 4-7%, manganese dioxide 1-3%, copper oxide 1-4%, iron oxide 1-5%, and the rest is feldspar.
[0007] Preferably, the glaze is prepared from the following raw materials in weight percentage: quartz 11-13%, wollastonite 18-22%, kaolin 9-11%, barium carbonate 5-7%, manganese dioxide 1-2%, copper oxide 2-3%, iron oxide 2-4%, and the rest is feldspar.
[0008] More preferably, the glaze is prepared from the following raw materials by weight percentage: quartz 12%, wollastonite 20%, kaolin 10%, barium carbonate 6%, manganese dioxide 1.5%, copper oxide 2.5%, iron oxide 3%, and feldspar 45%.
[0009] The second aspect of the present application provides a preparation method of the red glaze porcelain of the first aspect of the present application, which comprises the following steps: Step 1, crushing, sieving feldspar, quartz, wollastonite and kaolin, then adding barium carbonate, manganese dioxide, copper oxide, iron oxide and mixing uniformly, then adding water and ball milling to obtain a glaze; Step 2, immersing the ceramic body in the glaze, blowing the glaze, and drying; Step 3, high-temperature firing the dried ceramic body.
[0010] In step 1, Preferably, the crushed feldspar, quartz, wollastonite and kaolin are sieved through an 80-120 mesh sieve.
[0011] In step 2, Preferably, the immersing time is 4-7s, the immersing frequency is 1 time, and the blowing frequency is 1 time.
[0012] Preferably, the drying temperature is 60-80℃, and the drying time is 1-3h.
[0013] In step 3, Preferably, the high-temperature firing comprises a biscuit baking stage, a holding stage and a reduction stage. More preferably, the biscuit baking stage comprises: heating at a heating rate of 3-5℃ / min to 550-650℃.
[0014] More preferably, the holding stage comprises: heating from 550-650℃ to 700-800℃, the heating time is 4-7h, and holding at this temperature for 0.5-2h.
[0015] More preferably, the reduction stage comprises: heating from 700-800℃ to 1200-1400℃ at a rate of 1-2℃ / min, and reducing at this temperature for 4-7h.
[0016] The present application has the following beneficial effects: (1) The glaze used in the red glaze porcelain of the present application is improved based on traditional raw materials, and by adjusting the proportion of each raw material, better firing results can be achieved, the defects of the red glaze surface are reduced, and the gloss of the red glaze surface is effectively improved.
[0017] The raw materials used in the glaze of the present application not only retain the unique charm of the original ore materials, but also improve the quality and yield of the porcelain.
[0018] (2) The feldspar, quartz and kaolin used in the present application are original ore materials, which have unique physical and chemical properties that artificial synthetic materials cannot replace. The natural quartz, feldspar and kaolin used in the present application have undergone long geological processes in the formation process, and have natural complexity and diversity in internal structure and composition. These characteristics can give the porcelain unique texture and color when the glaze is fired. For example, although the content of some trace elements in the original ore is extremely small, they may have a subtle and critical influence on the final presentation of the glaze color, making the red color of the glaze more warm and deep, and rich in layers.
[0019] In addition, the feldspar, quartz and kaolin used in the present application have relatively small environmental impact during mining and use, and are more green and environmentally friendly.
[0020] (3) The firing method of the glaze porcelain of the present application is simple, the temperature and atmosphere in the kiln are uniform, the glaze surface obtained by firing is more flat and smooth, the color is more uniform and bright, the quality is higher, the quality consistency is higher, the artistic value is higher, and the pursuit of high-quality porcelain and traditional culture by modern people is met. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 A photo showing the glaze porcelain of Example 1 fired by the present application is shown; Figure 2 A photo showing the glaze porcelain of Example 2 fired by the present application is shown; Figure 3 A photo showing the glaze porcelain of Example 3 fired by the present application is shown; Figure 4 A photo showing the glaze porcelain of Comparative Example 1 fired by the present application is shown; Figure 5 A photo showing the glaze porcelain of Comparative Example 2 fired by the present application is shown; Figure 6 A photo showing the glaze porcelain of Comparative Example 3 fired by the present application is shown; Figure 7 A photo showing the glaze porcelain of Comparative Example 4 fired by the present application is shown; Figure 8 A photo showing the glaze porcelain of Comparative Example 5 fired by the present application is shown; Figure 9 A photo showing the glaze porcelain of Comparative Example 6 fired by the present application is shown. DETAILED DESCRIPTION
[0022] The present application will be described in detail below, and the features and advantages of the present application will become more apparent with these descriptions.
[0023] The first aspect of the present application provides a red glaze porcelain, which is prepared from a ceramic body and a glaze, and the glaze is prepared from the following raw materials in percentage by weight: quartz 10-15%, wollastonite 15-25%, kaolin 8-12%, barium carbonate 4-7%, manganese dioxide 1-3%, copper oxide 1-4%, iron oxide 1-5%, and the rest is feldspar. The copper oxide is the main colorant.
[0024] Preferably, the glaze of the red glaze porcelain is prepared from the following raw materials in percentage by weight: quartz 11-13%, wollastonite 18-22%, kaolin 9-11%, barium carbonate 5-7%, manganese dioxide 1-2%, copper oxide 2-3%, iron oxide 2-4%, and the rest is feldspar.
[0025] More preferably, the glaze of the red glaze porcelain is prepared from the following raw materials in percentage by weight: quartz 12%, wollastonite 20%, kaolin 10%, barium carbonate 6%, manganese dioxide 1.5%, copper oxide 2.5%, iron oxide 3%, and feldspar accounts for 45%.
[0026] When the addition amount of each raw material in the glaze of the red glaze porcelain is within the above-mentioned mass percentage range, the red glaze glaze surface is calm and restrained, and the smoothness is high. It is found through experiments that when the addition amount of feldspar is too high, such as higher than 60%, the flowability of the red glaze glaze surface is enhanced, which easily leads to the over-thin glaze layer at the mouth edge, the exposure of the body, the accumulation of the glaze layer at the bottom to produce the “glaze shrinkage” defect, and the decrease of the glaze surface hardness. If the addition amount of feldspar is too low, such as less than 29%, the glaze material will not be fully melted, the glaze surface will be rough and dry, there will be a large number of pinholes and bubbles, and the gloss will be significantly reduced. If the addition amount of copper oxide is too high, the porcelain glaze surface will present dark brown patches, the color is dark and dull without luster, and the gloss will be reduced. If the addition amount of copper oxide is too low, the red color of the glaze surface will be light, the unique rich red color of the red glaze will be lost, and there will be the problem of “insufficient color development”.
[0027] The second aspect of the present application provides a preparation method of the red glaze porcelain of the first aspect of the present application, which comprises the following steps: Step 1, crushing, sieving the feldspar, quartz, wollastonite and kaolin, then adding barium carbonate, manganese dioxide, copper oxide and iron oxide to mix uniformly, and then adding water and ball milling to obtain a glaze; Step 2, immersing the ceramic body in the glaze and drying; Step 3, high-temperature firing the dried ceramic body.
[0028] The above steps are described in detail as follows.
[0029] In step 1, the crushed feldspar, quartz, wollastonite and kaolin are sieved through a 80-120 mesh sieve.
[0030] Preferably, the crushed feldspar, quartz, wollastonite and kaolin are sieved through a 100 mesh sieve.
[0031] It has been found through experiments that sieving the crushed feldspar, quartz, wollastonite and kaolin through the above mesh size range can make the particle size of the glaze finer, and the glaze surface obtained after firing smoother and more uniform in gloss.
[0032] In step 2, the glazing time is 4-7s, the glazing frequency is 1 time, and the glazing is blown 1 time.
[0033] Preferably, the glazing time is 5s, the glazing frequency is 1 time, and the glazing is blown 1 time.
[0034] It has been found through experiments that when the glazing time is within the above range, the glazing effect on the surface of the ceramic body is more uniform, and the gloss of the glaze after firing is more uniform, and the combination between the glaze and the ceramic body is more compact.
[0035] The drying temperature is 60-80℃, and the drying time is 1-3h.
[0036] Preferably, the drying temperature is 70℃, and the drying time is 2h.
[0037] Drying can make the glaze evenly cover the surface of the ceramic body first, and then the biscuiting, soaking and reduction are carried out, which is beneficial to improve the uniformity of the glaze color.
[0038] In step 3, the high-temperature firing includes a biscuiting stage, a soaking stage and a reduction stage. The high-temperature firing time is 13-15h, and preferably, the high-temperature firing time is 13-14h.
[0039] The biscuiting stage includes: heating at a heating rate of 3-5℃ / min to 550-650℃.
[0040] Preferably, the biscuiting stage includes: heating at a heating rate of 3℃ / min to 600℃.
[0041] The biscuiting temperature should not be too high. If the biscuiting temperature is too high, over-firing will occur, which will make the glaze color dark. If the biscuiting temperature is too low, the combination between the glaze and the ceramic body will be low. It has been found through experiments that when the biscuiting heating rate and the biscuiting time are within the above ranges, it is beneficial to improve the tightness between the glaze and the body, and improve the gloss and smoothness of the glaze.
[0042] The soaking stage includes: heating from 550-650℃ to 700-800℃, the heating time is 4-7h, and the soaking time at this temperature is 0.5-2h.
[0043] Preferably, the temperature maintaining stage comprises: warming up from 600℃ to 750℃, the warming up time is 5h, and the temperature is maintained for 1h at the temperature.
[0044] After the temperature maintaining stage, the reduction is started, the pressure is adjusted, the pressure is adjusted to 0.02-0.04MPa, preferably the pressure is adjusted to 0.03MPa, the damper and the baffle, and the temperature is not too fast.
[0045] The firing pressure is an important condition parameter for preparing the red glaze, and if the pressure deviates from the above range, the quality of the glaze surface will be seriously deteriorated. If the firing pressure is higher than 0.04MPa, the bubbles in the glaze are difficult to be discharged under high pressure, and dense "bubble defects" are formed on the glaze surface, and the bubbles are broken to form pinholes, which will damage the integrity of the glaze surface; at the same time, the high firing pressure will also inhibit the normal melting of the glaze, resulting in the decrease of the gloss of the glaze surface, and the "matte" effect is presented. If the firing pressure is too low, the atmosphere stability in the kiln is poor, and oxygen is easily introduced, so that the coloring agent (such as copper oxide) is oxidized to a high valence state, the red color of the glaze surface is faded to dark red or brown, and the "oxidation discoloration" defect is appeared. In addition, the low pressure environment will also make the glaze layer not tightly combined with the body.
[0046] The reduction stage comprises: warming up from 700-800℃ to 1200-1400℃ at 1-2℃ / min, and reducing for 4-7h at the temperature.
[0047] Preferably, the reduction stage comprises: warming up from 750℃ to 1300℃ at 1℃ / min, and reducing for 5h at the temperature.
[0048] The glaze surface of the red glaze porcelain ware obtained by using the above firing method is more flat, smooth, the color is more uniform and bright, and the quality is higher.
[0049] The use amount range of the raw materials and the change of the firing parameters are crucial for the present application, and whether the use amount of the raw materials is changed or the firing pressure is deviated, the unacceptable defects of the red glaze will be appeared, and the limitation of the raw material ratio and the preparation pressure parameters in the present application is crucial for the final effect of the red glaze, and is the key technical feature for guaranteeing the product quality of the red glaze.
[0050] Embodiment The present application will be further described by specific examples, and the examples are only limited to illustrate the present application, and are not used to limit the scope of the present application. The raw materials used in the embodiment of the present application are all purchased.
[0051] Embodiment 1 The raw materials are weighed according to the following weight percentage: quartz 12%, wollastonite 20%, kaolin 10%, barium carbonate 6%, manganese dioxide 1.5%, copper oxide 2.5%, iron oxide 3%, and the rest is feldspar.
[0052] The crushed feldspar, quartz, wollastonite and kaolin are passed through a 100-mesh sieve, then the barium carbonate, manganese dioxide, copper oxide and iron oxide are added and uniformly mixed, and then water is added and ball milled to obtain the glaze.
[0053] The ceramic body is immersed in the glaze for 5s, 1 time, and blown once, and then dried at 70℃ for 2h.
[0054] The dried ceramic body is high-temperature fired, the ignition is started, the kiln car is put into the kiln, a gap is left in the kiln door, and the temperature is slowly raised, and the early stage is the base baking stage. If it is a large piece, it is not suitable to raise the temperature too fast. The high-temperature firing includes the base baking stage, the holding stage and the reduction stage. The base baking stage includes: raising the temperature to 600℃ at a speed of 3℃ / min; the holding stage includes: raising the temperature from 600℃ to 750℃, the raising time is 5h, and the temperature is kept for 1h; after the holding is finished, the reduction is started, the pressure is adjusted to 0.03MPa, the air door and the baffle are adjusted, and the temperature is not raised too fast, and the reduction stage includes: raising the temperature from 750℃ to 1300℃ at a speed of 1℃ / min, and reducing for 5h at the temperature. The fired Jihong glaze porcelain is as shown in Figure 1 It can be seen that the glaze surface of the fired Jihong glaze porcelain is flat, smooth, uniform in color, bright in color and high in quality.
[0055] Example 2 The raw materials are weighed according to the following weight percentage: quartz 11%, wollastonite 18%, kaolin 9%, barium carbonate 5%, manganese dioxide 1%, copper oxide 2%, iron oxide 2%, and the rest is feldspar.
[0056] The crushed feldspar, quartz, wollastonite and kaolin are passed through an 80-mesh sieve, then the barium carbonate, manganese dioxide, copper oxide and iron oxide are added and uniformly mixed, and then water is added and ball milled to obtain the glaze.
[0057] The ceramic body is immersed in the glaze for 4s, 1 time, and blown once, and then dried at 60℃ for 3h.
[0058] The dried ceramic body is high-temperature fired, ignition is started, the kiln car is put into the kiln, a gap is left in the kiln door, and the temperature is slowly raised. The early stage is the biscuit baking stage. If it is a large piece, the temperature should not be raised too fast. High-temperature firing includes the biscuit baking stage, the soaking stage and the reduction stage. The biscuit baking stage includes: the temperature is raised to 550℃ at a rate of 3℃ / min; the soaking stage includes: the temperature is raised from 550℃ to 700℃, the raising time is 4h, and the temperature is kept at this temperature for 0.5h; after the soaking is finished, the reduction is started, the pressure is adjusted to 0.02MPa, the air door and the baffle are adjusted, and the temperature should not be raised too fast. The reduction stage includes: the temperature is raised from 700℃ to 1200℃ at a rate of 2℃ / min, and the reduction is kept at this temperature for 7h. The photo of the red glaze porcelain obtained by firing is shown in Figure 2 As can be seen from the photo, the glaze surface of the red glaze porcelain obtained by firing is smooth, the color is uniform and bright, and the quality is high.
[0059] Example 3 The raw materials are weighed according to the following weight percentages: quartz 13%, wollastonite 22%, kaolin 11%, barium carbonate 7%, manganese dioxide 2%, copper oxide 3%, iron oxide 4%, and the rest is feldspar.
[0060] The crushed feldspar, quartz, wollastonite and kaolin are passed through a 120 mesh sieve, then the barium carbonate, manganese dioxide, copper oxide and iron oxide are added and mixed uniformly, and then water is added and ball milled to obtain the glaze.
[0061] The ceramic body is immersed in the glaze for 7s, 1 time, and blown 1 time, and then dried at 80℃ for 1h.
[0062] The dried ceramic body is high-temperature fired, ignition is started, the kiln car is put into the kiln, a gap is left in the kiln door, and the temperature is slowly raised. The early stage is the biscuit baking stage. If it is a large piece, the temperature should not be raised too fast. High-temperature firing includes the biscuit baking stage, the soaking stage and the reduction stage. The biscuit baking stage includes: the temperature is raised to 650℃ at a rate of 5℃ / min; the soaking stage includes: the temperature is raised from 650℃ to 800℃, the raising time is 7h, and the temperature is kept at this temperature for 2h; after the soaking is finished, the reduction is started, the pressure is adjusted to 0.04MPa, the air door and the baffle are adjusted, and the temperature should not be raised too fast. The reduction stage includes: the temperature is raised from 800℃ to 1400℃ at a rate of 1℃ / min, and the reduction is kept at this temperature for 4h. The photo of the red glaze porcelain obtained by firing is shown in Figure 3 As can be seen from the photo, the surface of the red glaze porcelain obtained by firing is bright in color and smooth in surface, and the quality is very high.
[0063] Comparative Example Comparative Example 1 The preparation of the red glaze porcelain is carried out in a similar manner as in Example 1, except that the amount of copper oxide added is 5%.
[0064] The photo of the red glaze porcelain obtained by firing is shown inFigure 4 As shown in FIG. 1, it can be seen that the glaze surface of the red glaze porcelain obtained by firing the Comparative Example 1 appears dark brown patches, the color is dark and dull, and the phenomenon of "overfiring blackening" occurs. Compared with the red glaze porcelain obtained by the Example 1, the L value (brightness) is reduced by 15%-20% and the a value (red-green color) is abnormally high.
[0065] Comparative Example 2 The preparation of the red glaze porcelain was carried out in a similar manner as the Example 1, except that the amount of copper oxide added was 0.5%.
[0066] The photos of the red glaze porcelain obtained by firing are shown in FIG. 2. Figure 5 As shown in FIG. 2, it can be seen that the glaze surface is light red, even light pink or grayish white, losing the unique rich red color of the red glaze, and the a* value is reduced by 25%-30% compared with the red glaze obtained by the Example 1, which has the problem of "insufficient color development".
[0067] Comparative Example 3 The preparation of the red glaze porcelain was carried out in a similar manner as the Example 1, except that the amount of feldspar added was 65%, quartz was 7.5%, wollastonite was 12.5%, kaolin was 8%, barium carbonate was 4%, manganese dioxide was 1%, copper oxide was 1%, and iron oxide was 1%.
[0068] The photos of the red glaze porcelain obtained by firing are shown in FIG. 3. Figure 6 As shown in FIG. 3, it can be seen that the glaze layer at the rim of the porcelain is too thin, the body is exposed, the glaze layer at the bottom is accumulated to produce the "glaze shrinkage" defect, the glaze surface hardness is reduced, and the Mohs hardness is reduced by 0.5-1 grade compared with the red glaze porcelain obtained by the Example 1.
[0069] Comparative Example 4 The preparation of the red glaze porcelain was carried out in a similar manner as the Example 1, except that the amount of feldspar added was 25%, quartz was 17.5%, wollastonite was 24.5%, kaolin was 14%, barium carbonate was 7%, manganese dioxide was 3%, copper oxide was 4%, and iron oxide was 5%.
[0070] The photos of the red glaze porcelain obtained by firing are shown in FIG. 4. Figure 7 As shown in FIG. 4, it can be seen that the glaze surface is rough and dry, there are a large number of pinholes and bubbles, the gloss is significantly reduced, and the mirror reflectivity is reduced by more than 30% compared with the standard value.
[0071] Comparative Example 5 The preparation of the red glaze porcelain was carried out in a similar manner as the Example 1, except that the pressure was adjusted to 0.05 MPa.
[0072] The photos of the red glaze porcelain obtained by firing are shown in FIG. 5. Figure 8 As shown in FIG. 5, it can be seen that the glaze surface has poor integrity and may produce white space, and the gloss is reduced.
[0073] Comparative Example 6 The preparation of the red glaze porcelain was carried out in a similar manner as in Example 1, except that the pressure was adjusted to 0.01 MPa.
[0074] The photo of the obtained red glaze porcelain is shown in Figure 9 It can be seen that the glaze surface is dark red or brown, the color is blackish, and the "oxidation discoloration" defect occurs.
[0075] The above detailed description of the present application is made in combination with the specific embodiments and exemplary examples, but these descriptions cannot be understood as limiting the present application. It is understood by those skilled in the art that various equivalent substitutions, modifications or improvements can be made to the technical solutions and embodiments of the present application without departing from the spirit and scope of the present application, and these all fall within the scope of the present application. The protection scope of the present application is subject to the appended claims.
Claims
1. A type of porcelain with a red glaze, characterized in that: The red glaze porcelain is made from a ceramic body and a glaze. The glaze is made from the following raw materials in weight percentage: quartz 10-15%, wollastonite 15-25%, kaolin 8-12%, barium carbonate 4-7%, manganese dioxide 1-3%, copper oxide 1-4%, iron oxide 1-5%, and the remainder is feldspar.
2. The sacrificial red glazed porcelain according to claim 1, characterized in that, The glaze is made from the following raw materials in weight percentage: quartz 11-13%, wollastonite 18-22%, kaolinite 9-11%, barium carbonate 5-7%, manganese dioxide 1-2%, copper oxide 2-3%, iron oxide 2-4%, and the remainder is feldspar.
3. The sacrificial red glaze according to claim 2, characterized in that, The glaze is made from the following raw materials in weight percentage: quartz 12%, wollastonite 20%, kaolin 10%, barium carbonate 6%, manganese dioxide 1.5%, copper oxide 2.5%, iron oxide 3%, and feldspar 45%.
4. A method for preparing a sacrificial red glazed porcelain as described in any one of claims 1 to 3, characterized in that, The preparation method includes the following steps: Step 1: Crush and sieve feldspar, quartz, wollastonite and kaolin, then add barium carbonate, manganese dioxide, copper oxide and iron oxide and mix evenly. Then add water and ball mill to obtain glaze. Step 2: Immerse the ceramic body in the glaze and dry it; Step 3: Fire the dried ceramic blank at high temperature.
5. The preparation method according to claim 4, characterized in that, In step 1, The crushed feldspar, quartz, wollastonite and kaolin are passed through an 80-120 mesh sieve.
6. The preparation method according to claim 4, characterized in that, In step 2, The glazing time is 4-7 seconds, the glazing is repeated once, and the glaze is blown once.
7. The preparation method according to claim 4, characterized in that, In step 2, The drying temperature is 60-80℃, and the drying time is 1-3 hours.
8. The preparation method according to claim 4, characterized in that, In step 3, The high-temperature firing process includes a baking stage, a heat preservation stage, and a reduction stage. The drying stage includes heating the blank to 550-650°C at a heating rate of 3-5°C / min.
9. The preparation method according to claim 8, characterized in that, In step 3, The heat preservation stage includes: raising the temperature from 550-650℃ to 700-800℃ for 4-7 hours, and then maintaining the temperature at that temperature for 0.5-2 hours.
10. The preparation method according to claim 8, characterized in that, In step 3, The reduction stage includes: increasing the temperature from 700-800℃ to 1200-1400℃ at a rate of 1-2℃ / min, and reducing at this temperature for 4-7 hours.