CN113511920B - Preparation method of snowflake-shaped devitrification ceramic glaze - Google Patents
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Abstract
The invention discloses a preparation method of a snowflake-shaped devitrification ceramic glaze, which is characterized by preparing calcined powder of egg shells, barium carbonate, quartz, dredged sediment dry powder and nano alumina powder into glaze according to a certain proportion, further regulating and controlling the proportion of the glaze, water and grinding balls, preparing the glaze into glaze slurry after planetary ball milling and sieving treatment, applying the glaze to the surface of a biscuit firing ceramic by adopting a glaze dipping method, drying the biscuit of the glaze and then placing the biscuit in a muffle furnace for firing to obtain a ceramic glaze product with snowflake-shaped devitrification.
Description
Technical Field
The invention relates to the technical field of ceramic glaze preparation, in particular to a preparation method of snowflake-shaped devitrified ceramic glaze.
Background
From the beginning of the generation, pottery is glazed, and the development has been for thousands of years. The ceramic glaze is a vitreous layer attached to the surface of the ceramic body, has the functions of air impermeability and water impermeability, increases the aesthetic feeling of ceramic utensils due to the ceramic glaze with different colors and textures, and can prevent the pollution of the utensils and is easy to clean. With the rapid development of society, people are more and more urgent to pursue novel ceramic glaze, and at present, the ceramic glaze on the market is not innovative enough and the problems of explosion and environmental pollution exist in the most used reducing atmosphere in the firing process.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a preparation method of a snowflake-shaped devitrified ceramic glaze, which can be used for preparing a snowflake-shaped devitrified ceramic glaze product under the condition of simple environmental protection, and the ceramic glaze can be applied to the fields of furnishing art porcelain and daily porcelain.
In order to achieve the purpose, the invention adopts the technical scheme that:
a preparation method of a snowflake-shaped devitrification ceramic glaze comprises the following steps:
step 1, weighing and preparing calcined powder of egg shells, barium carbonate, quartz, dredged sediment dry powder and nano alumina powder into JS glaze according to a certain mass ratio;
step 2, mixing the JS glaze, water and agate grinding balls according to the proportion of 1.0:1.6:1.6, then ball-milling by adopting a planetary ball mill to obtain slurry after ball-milling is finished, and screening the slurry through a 300-mesh screen to obtain JS glaze slurry;
step 4, uniformly coating glaze on the surface of the biscuit firing ceramic blank in the step 3 by adopting a glaze dipping method through the JS glaze slurry prepared in the step 2 to obtain a JS-applied glaze ceramic biscuit, and fully drying the JS-applied glaze ceramic biscuit to obtain a dry JS-applied glaze ceramic biscuit;
and 5, putting the dry JS-applied ceramic biscuit prepared in the step 4 into a program-controllable high-temperature furnace, and firing under the air atmosphere condition to obtain the snowflake-shaped devitrified ceramic glaze product.
Preferably, the calcined eggshell powder obtained in the step 1 is obtained by mechanically crushing eggshells and then calcining the crushed eggshells at a high temperature, wherein the calcining temperature is 500-650 ℃, and the heat preservation time is 1.5-3 hours.
Preferably, the dry dredged sediment powder in the step 1 is obtained by sieving the dredged sediment through a 200-mesh sieve and fully drying the dredged sediment powder in an air-blast drying oven, wherein the drying temperature is 180-220 ℃, and the drying time is 5-8 h.
Preferably, the particle size of the nano alumina powder in the step 1 is 10-100 nm.
Preferably, in the step 1, the JS glaze is prepared by weighing the calcined eggshell powder, the barium carbonate, the quartz, the dredged sediment dry powder and the nano alumina powder according to the mass ratio of (the calcined eggshell powder, the barium carbonate, the quartz, the dredged sediment dry powder, the nano alumina powder = (30-40): (20-25): 30-35): 1.5-3.0): 2.5-7)).
Preferably, the ball milling rotation speed of the planetary ball milling in the step 2 is 330-380r/min, and the ball milling time is 12-20h.
Preferably, the ceramic biscuit in the step 3 has a formula of 51.5% of kaolin, 33% of quartz and 15.5% of feldspar.
Preferably, the thickness of the glaze layer of the JS glaze ceramic biscuit applied in the step 4 is 1.2-1.5mm.
Preferably, the full drying condition of the JS glaze ceramic biscuit in the step 4 is that the ceramic biscuit subjected to the glaze is placed in a forced air drying box and dried for 24-36h under the condition that the set temperature is 60-80 ℃.
Preferably, the firing temperature of the JS glaze ceramic biscuit applied in the step 5 is 1200-1230 ℃.
Preferably, the heating rate is 3-5 ℃/min in the firing process of applying JS glaze ceramic biscuit in the step 5.
Preferably, the heat preservation time in the firing process of applying JS glaze ceramic biscuit in the step 5 is 20-30min.
Preferably, the cooling condition after the JS glaze ceramic biscuit firing in the step 5 is furnace cooling.
Preferably, the snowflake-shaped devitrified ceramic glaze product obtained in the step 5 has an obvious devitrified area visible by a scanning electron microscope. Compared with the prior art, the invention has the beneficial effects that:
the snowflake-shaped devitrification ceramic glaze fired by the invention has the following characteristics: the glaze surface has obvious snowflake-shaped crystallization phenomenon, the existence of an obvious crystallization area on the surface of the glaze layer can be observed through a scanning electron microscopy technology, the glaze layer is smooth and the enamel is translucent, the firing equipment is simple, the glaze is fired in an oxidizing atmosphere, the raw materials comprise a large amount of wastes such as egg shell calcined powder, dredging bottom mud and the like, the snowflake-shaped crystalline ceramic glaze product is fired at the glaze firing temperature of 1200-1230 ℃ under the condition of not adding fluxing agents such as feldspar and the like by utilizing the synergistic reaction of the components such as calcium carbonate and the like in the egg shell powder and the raw materials such as the dredging bottom mud and the like in the glaze firing process, the raw materials are low in price, the firing cost is low, the resource recycling of the wastes is realized, and the environment-friendly and safe production of the glaze is also realized.
Drawings
FIG. 1 is a macroscopic view of example 1 of the present invention;
FIG. 2 is an SEM photograph of example 1 of the present invention;
FIG. 3 is an XRD pattern of example 1 of the present invention;
FIG. 4 is a macroscopic view of example 2 of the present invention;
FIG. 5 is an SEM photograph of example 2 of the present invention;
FIG. 6 is a macroscopic view of example 3 of the present invention;
FIG. 7 is an SEM photograph of example 3 of the present invention;
FIG. 8 is a macroscopic view of example 4 of the present invention;
FIG. 9 is an SEM photograph of example 4 of the present invention;
FIG. 10 is a macroscopic view of example 5 of the present invention;
FIG. 11 is an SEM photograph of example 5 of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood and practical for those skilled in the art, the present invention is further described with reference to the following drawings and specific examples, which are not intended to limit the present invention.
The test methods not specifically described in the following examples were carried out according to the conventional methods and conditions in the art, and the materials used were commercially available unless otherwise specified.
Example 1
A preparation method of a snowflake-shaped devitrification ceramic glaze comprises the following steps:
step 1, weighing and preparing a JS glaze by using calcined eggshell powder, barium carbonate, quartz, dredged sediment dry powder and nano alumina powder according to the mass ratio of (the calcined eggshell powder: barium carbonate: quartz: dredged sediment dry powder: nano alumina powder = (30.
Step 2, mixing the JS glaze, water and agate grinding balls according to the proportion of 1.0:1.6:1.6, then ball-milling by adopting a planetary ball mill, wherein the ball-milling rotation speed of the planetary ball mill is 380r/min, the ball-milling time is 20h, obtaining slurry after the ball-milling is finished, and sieving the slurry by using a 300-mesh sieve to obtain JS glaze slurry;
and 3, putting the ceramic biscuit into a program-controllable high-temperature furnace, setting the heating rate to be 3.5 ℃/min, heating to 885 ℃ under the air atmosphere condition, keeping the temperature for 30min, and then cooling along with the furnace to obtain a biscuit-fired ceramic body, wherein the ceramic biscuit is prepared from 51.5% of kaolin, 33% of quartz and 15.5% of feldspar.
Step 4, uniformly coating glaze on the surface of the biscuit ceramic blank subjected to firing in the step 3 by adopting a glaze dipping method through the JS glaze slurry prepared in the step 2 to obtain a JS-applied glaze ceramic biscuit, wherein the thickness of a glaze layer is 1.5mm, placing the glaze-applied ceramic biscuit in a forced air drying box, and drying for 36 hours at the set temperature of 60 ℃ to obtain a dry JS-applied glaze ceramic biscuit;
and 5, putting the dry JS-applied ceramic biscuit prepared in the step 4 into a program-controllable high-temperature furnace, firing under the air atmosphere condition, wherein the heating rate is 5 ℃/min, the firing temperature is 1230 ℃, the heat preservation time is 20min, and cooling along with the furnace after firing to obtain the snowflake-shaped devitrified ceramic glaze product.
FIG. 1 is a graph showing the effect of a ceramic glaze produced by the method of example 1, in which the glaze layer has snowflake-like devitrification and the glaze layer is mainly bright white and contains slight yellow; the color coordinates of the glaze layers are respectively L =72.8, a =1.9, b =5.3, wherein L represents brightness, a represents (+ red, -green), b represents (+ yellow, -blue), and the value of L in the color coordinates of the glaze layers is larger. Fig. 2 shows a XRD analysis of the glaze of the ceramic glaze prepared by the method of example 1, and it can be seen that the glaze of example 1 has a distinct crystal diffraction peak. Fig. 3 shows an SEM image of the glaze surface of the ceramic glaze prepared by the method of example 1, and it can be seen that the ceramic glaze fired by example 1 is a snowflake-shaped devitrified glaze as shown in the SEM image.
Example 2
A preparation method of a snowflake-shaped devitrification ceramic glaze comprises the following steps:
step 1, weighing and preparing chicken eggshell calcined powder, barium carbonate, quartz, dredged sediment dry powder and nano alumina powder into a JS glaze according to the mass ratio of (the chicken eggshell calcined powder: the barium carbonate: the quartz: the dredged sediment dry powder: the nano alumina powder = (40; wherein the calcined eggshell powder is prepared by mechanically crushing eggshells and calcining at high temperature, the calcining temperature is 500 ℃, and the heat preservation time is 3 h; the dredged sediment dry powder is obtained by sieving dredged sediment through a 200-mesh sieve and fully drying the dredged sediment in an air-blast drying oven, wherein the drying temperature is 180 ℃, and the drying time is 8h; the grain diameter of the nano alumina powder is 10 nanometers.
Step 2, mixing the JS glaze, water and agate grinding balls according to the proportion of 1.0:1.6:1.6, then ball-milling by adopting a planetary ball mill, wherein the ball-milling rotation speed of the planetary ball mill is 330r/min, the ball-milling time is 20h, obtaining slurry after the ball-milling is finished, and sieving the slurry by using a 300-mesh sieve to obtain JS glaze slurry;
and 3, putting the ceramic biscuit into a program-controlled high-temperature furnace, heating to 885 ℃ at a heating rate of 3.5 ℃/min under the air atmosphere condition, keeping the temperature for 30min, and cooling along with the furnace to obtain a biscuit ceramic blank, wherein the ceramic biscuit is prepared from 51.5% of kaolin, 33% of quartz and 15.5% of feldspar.
Step 4, uniformly coating the surface of the biscuit firing ceramic blank in the step 3 with glaze by adopting a glaze dipping method through the JS glaze slurry prepared in the step 2 to obtain a JS-applied glaze ceramic biscuit, wherein the thickness of a glaze layer is 1.2mm, placing the JS-applied glaze ceramic biscuit in a blast drying box, and drying for 24 hours at the set temperature of 80 ℃ to obtain a dry JS-applied glaze ceramic biscuit;
and 5, putting the dry JS-applied ceramic biscuit prepared in the step 4 into a program-controllable high-temperature furnace, firing under the air atmosphere condition, wherein the heating rate is 3 ℃/min, the firing temperature is 1200 ℃, the heat preservation time is 20min, and cooling along with the furnace after firing to obtain the snowflake-shaped devitrified ceramic glaze product.
FIG. 4 is a graph showing the effect of the ceramic glaze produced by the method of example 2, in which the glaze layer has snowflake-like devitrification and the glaze layer is mainly bright white and contains slight yellow; the color coordinates of the glaze layers are respectively L =75.9, a =1.2, b =6.1, wherein L represents brightness, a represents (+ red, -green), b represents (+ yellow, -blue), and the value of L in the color coordinates of the glaze layers is larger, so that the glaze layers are mainly bright white, and in addition, the glaze layers have good glossiness and clear enamel, have certain jade texture, and do not have defects of pinholes, orange glaze and the like. Fig. 5 shows an SEM image of the glaze surface of the ceramic glaze prepared by the method of example 2, and it can be seen that the ceramic glaze fired by the method of example 2 is a snowflake-shaped devitrified glaze as well as confirmed by the existence of distinct devitrified areas in the glaze surface of example 2.
Example 3
A preparation method of a snowflake-shaped devitrification ceramic glaze comprises the following steps:
step 1, calcining chicken eggshells, barium carbonate, quartz, dredged sediment dry powder and nano alumina powder according to the mass ratio: barium carbonate: quartz: dry dredged sediment powder: nano alumina powder = (35; wherein the calcined eggshell powder is prepared by mechanically crushing eggshells and then calcining at high temperature, wherein the calcining temperature is 600 ℃, and the heat preservation time is 2 hours; the dredged sediment dry powder is obtained by sieving dredged sediment through a 200-mesh screen and fully drying the dredged sediment in an air-blast drying oven, wherein the drying temperature is 200 ℃, and the drying time is 7 hours; the grain diameter of the nano alumina powder is 40 nanometers.
Step 2, mixing the JS glaze, water and agate grinding balls according to the proportion of 1.0:1.6:1.6, then ball-milling by adopting a planetary ball mill, wherein the ball-milling rotation speed of the planetary ball mill is 350r/min, the ball-milling time is 15h, obtaining slurry after the ball-milling is finished, and sieving the slurry by using a 300-mesh sieve to obtain JS glaze slurry;
and 3, putting the ceramic biscuit into a program-controlled high-temperature furnace, heating to 885 ℃ at a heating rate of 3.5 ℃/min under the air atmosphere condition, keeping the temperature for 30min, and cooling along with the furnace to obtain a biscuit ceramic blank, wherein the ceramic biscuit is prepared from 51.5% of kaolin, 33% of quartz and 15.5% of feldspar.
Step 4, uniformly coating the surface of the biscuit firing ceramic blank in the step 3 with glaze by adopting a glaze dipping method through the JS glaze slurry prepared in the step 2 to obtain a JS-applied glaze ceramic biscuit, wherein the thickness of a glaze layer is 1.3mm, placing the JS-applied glaze ceramic biscuit in a blast drying box, and drying for 30h at the set temperature of 70 ℃ to obtain a dry JS-applied glaze ceramic biscuit;
and 5, putting the dry JS-applied ceramic biscuit prepared in the step 4 into a program-controllable high-temperature furnace, firing under the air atmosphere condition, wherein the heating rate is 4 ℃/min, the firing temperature is 1210 ℃, the heat preservation time is 25min, and cooling along with the furnace after firing to obtain the snowflake-shaped devitrified ceramic glaze product.
FIG. 6 is a graph showing the effect of the ceramic glaze produced by the method of example 3, the glaze layer showing a pine-cypress green color; the color coordinates of the enamel layers are L × =75.6, a × =1.3, b × =6.9, wherein L × represents brightness, a × represents (+ red, -green), and b × represents (+ yellow, -blue), respectively. The value of L in the color coordinates of the glaze layer is larger, and further shows that the glaze layer is mainly bright white, and in addition, the glaze layer has good glossiness, crystal enamel, certain jade texture and no defects of pinholes, orange glaze and the like. Fig. 7 shows an SEM image of the glaze surface of the ceramic glaze prepared by the method of example 3, and it can be seen that the ceramic glaze fired by example 3 is a snowflake-shaped devitrified glaze as shown in the SEM image.
Example 4
A preparation method of a snowflake-shaped devitrification ceramic glaze comprises the following steps:
step 1, weighing and preparing chicken eggshell calcined powder, barium carbonate, quartz, dredged sediment dry powder and nano alumina powder into JS glaze according to the mass ratio of (the chicken eggshell calcined powder is barium carbonate: quartz: dredged sediment dry powder: nano alumina powder =40: 3.5); wherein the calcined eggshell powder is prepared by mechanically crushing eggshells and calcining at high temperature, the calcining temperature is 580 ℃, and the heat preservation time is 2.5 h; the dredged sediment dry powder is obtained by sieving dredged sediment through a 200-mesh screen and fully drying the dredged sediment in an air-blast drying oven, wherein the drying temperature is 220 ℃, and the drying time is 6 hours; the grain diameter of the nano alumina powder is 40 nanometers.
Step 2, mixing the JS glaze, water and agate grinding balls according to the proportion of 1.0:1.6:1.6, and then ball-milling by adopting a planetary ball mill, wherein the ball-milling rotation speed of the planetary ball mill is 380r/min, the ball-milling time is 12h, slurry is obtained after the ball-milling is finished, and the slurry is sieved by a 300-mesh sieve to obtain JS glaze slurry;
and 3, putting the ceramic biscuit into a program-controlled high-temperature furnace, heating to 885 ℃ at a heating rate of 3.5 ℃/min under the air atmosphere condition, keeping the temperature for 30min, and cooling along with the furnace to obtain a biscuit ceramic blank, wherein the ceramic biscuit is prepared from 51.5% of kaolin, 33% of quartz and 15.5% of feldspar.
Step 4, uniformly coating the surface of the biscuit firing ceramic blank in the step 3 with glaze by adopting a glaze dipping method through the JS glaze slurry prepared in the step 2 to obtain a JS-applied glaze ceramic biscuit, wherein the thickness of a glaze layer is 1.2mm, and drying the JS-applied glaze ceramic biscuit for 36h at the set temperature of 60 ℃ to obtain a dry JS-applied glaze ceramic biscuit;
and 5, putting the dry JS glaze ceramic biscuit prepared in the step 4 into a high-temperature furnace with controllable program, firing under the air atmosphere condition, wherein the heating rate is 5 ℃/min, the firing temperature is 1200 ℃, the heat preservation time is 20min, and cooling along with the furnace after firing is carried out to obtain the snowflake-shaped devitrified ceramic glaze product.
FIG. 8 is a graph showing the effect of the ceramic glaze prepared by the method of example 4, in which the glaze layer has a pine and cypress green color; the color coordinates of the enamel layers are L × =76.5, a × =1.1, b × =4.9, wherein L × represents brightness, a × represents (+ red, -green), and b × represents (+ yellow, -blue), respectively. The value of L in the color coordinates of the glaze layer is larger, which further indicates that the glaze layer is mainly bright white, and in addition, the glaze layer has good glossiness, clear enamel and certain jade texture, and has no defects of pinholes, orange glaze and the like. Fig. 9 shows an SEM image of the glaze surface of the ceramic glaze prepared by the method of example 4, and it can be seen that the ceramic glaze fired by example 4 is a snowflake-shaped devitrified glaze as shown in the SEM image.
Example 5
A preparation method of a snowflake-shaped devitrification ceramic glaze comprises the following steps:
step 1, weighing and preparing chicken egg shell calcined powder, barium carbonate, quartz, dredged sediment dry powder and nano alumina powder into JS glaze according to the mass ratio of (the chicken egg shell calcined powder is barium carbonate: quartz: dredged sediment dry powder: nano alumina powder = (38.
Step 2, mixing the JS glaze, water and agate grinding balls according to the proportion of 1.0:1.6:1.6, then ball-milling by adopting a planetary ball mill, wherein the ball-milling rotation speed of the planetary ball mill is 330r/min, the ball-milling time is 20h, obtaining slurry after the ball-milling is finished, and sieving the slurry by using a 300-mesh sieve to obtain JS glaze slurry;
and 3, putting the ceramic biscuit into a program-controlled high-temperature furnace, heating to 885 ℃ at a heating rate of 3.5 ℃/min under the air atmosphere condition, keeping the temperature for 30min, and cooling along with the furnace to obtain a biscuit ceramic blank, wherein the ceramic biscuit is prepared from 51.5% of kaolin, 33% of quartz and 15.5% of feldspar.
Step 4, uniformly coating the surface of the biscuit firing ceramic blank in the step 3 with glaze by adopting a glaze dipping method through the JS glaze slurry prepared in the step 2 to obtain a JS-applied glaze ceramic biscuit, wherein the thickness of a glaze layer is 1.4mm, placing the JS-applied glaze ceramic biscuit in a blast drying box, and drying for 24 hours at the set temperature of 80 ℃ to obtain a dry JS-applied glaze ceramic biscuit;
and 5, putting the dry JS-applied ceramic biscuit prepared in the step 4 into a program-controllable high-temperature furnace, firing under the air atmosphere condition, wherein the heating rate is 3 ℃/min, the firing temperature is 1220 ℃, the heat preservation time is 25min, and cooling along with the furnace after firing to obtain the snowflake-shaped devitrified ceramic glaze product.
FIG. 10 is a graph showing the effect of the ceramic glaze produced by the method of example 5, the glaze layer showing a pine-cypress green color; the color coordinates of the enamel layers are L =79.1, a =1.5, b =3.3, wherein L represents brightness, a represents (+ red, -green), and b represents (+ yellow, -blue), respectively. The value of L in the color coordinates of the glaze layer is larger, which further indicates that the glaze layer is mainly bright white, and in addition, the glaze layer has good glossiness, clear enamel and certain jade texture, and has no defects of pinholes, orange glaze and the like. Fig. 11 shows an SEM image of the glaze surface of the ceramic glaze prepared by the method of example 5, and it can be seen that the ceramic glaze fired by the method of example 5 is a snowflake-shaped devitrified glaze as well as confirmed by the existence of distinct devitrified areas in the glaze surface of example 5.
It should be noted that when the present specification refers to numerical ranges, it should be understood that two endpoints of each numerical range and any value between the two endpoints can be selected, and since the steps and methods adopted are the same as those in embodiments 1 to 5, the present invention describes preferred embodiments in order to prevent redundancy, but once a person skilled in the art knows the basic inventive concept, other changes and modifications can be made to the embodiments. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A preparation method of snowflake-shaped devitrification ceramic glaze is characterized by comprising the following steps: the method comprises the following steps:
step 1, weighing and preparing calcined powder of egg shells, barium carbonate, quartz, dredged sediment dry powder and nano alumina powder into JS glaze according to a certain mass ratio, wherein the particle size of the nano alumina powder is 10-40 nanometers;
step 2, mixing the JS glaze, water and agate grinding balls according to the proportion of 1.0:1.6:1.6, ball-milling by adopting a planetary ball mill to obtain slurry after ball-milling is finished, and sieving the slurry by a 300-mesh sieve to obtain JS glaze slurry, wherein the ball-milling autorotation rotation speed of the planetary ball mill is 330-380r/min, and the ball-milling time is 12-20h;
step 3, putting the ceramic biscuit into a program-controllable high-temperature furnace, setting the heating rate to be 3.5 ℃/min, heating to 885 ℃, keeping the temperature for 30min, and then cooling along with the furnace under the air atmosphere condition to obtain a biscuit firing ceramic body;
step 4, uniformly coating the glaze on the surface of the biscuit firing ceramic blank in the step 3 by adopting the JS glaze dipping method through the JS glaze slurry prepared in the step 2, wherein the thickness of a glaze layer of the JS-applied glaze ceramic blank is 1.3-1.5mm, so as to obtain a JS-applied glaze ceramic blank, and fully drying the JS-applied glaze ceramic blank to obtain a dry JS-applied glaze ceramic blank;
step 5, putting the dry JS glaze ceramic biscuit prepared in the step 4 into a program-controllable high-temperature furnace, and firing under the air atmosphere condition at the firing temperature of 1200-1230 ℃ to obtain the snowflake-shaped devitrified ceramic glaze product;
wherein, in the step 1, the calcined eggshell powder, the barium carbonate, the quartz, the dredged sediment dry powder and the nano alumina powder are in the following mass ratio: barium carbonate: quartz: dry dredged sediment powder: nano alumina powder = (30-40): (20-25): (30-35): (1.5-3.0): (2.5-7) weighing and preparing the JS glaze.
2. The method for preparing a snowflake-shaped devitrifying ceramic glaze according to claim 1, wherein the calcined powder of egg shells in the step 1 is prepared by mechanically crushing egg shells and then calcining the crushed egg shells at a high temperature, wherein the calcining temperature is 500-650 ℃, and the holding time is 1.5-3 h.
3. The method for preparing the snowflake-shaped devitrified ceramic glaze according to claim 1, wherein the dredged sediment dry powder in the step 1 is obtained by sieving the dredged sediment through a 200-mesh sieve and then fully drying the dredged sediment in a forced air drying oven, wherein the drying temperature is 180-220 ℃ and the drying time is 5-8 h.
4. The method for preparing the snowflake-shaped devitrified ceramic glaze according to claim 1, wherein the ceramic biscuit in the step 3 is prepared from 51.5% of kaolin, 33% of quartz and 15.5% of feldspar.
5. The method for preparing the snowflake-shaped devitrification ceramic glaze according to claim 1, wherein the JS glaze is applied to the ceramic biscuit in the step 4 under the condition that the ceramic biscuit is dried in an air drying oven for 24-36 hours at a set temperature of 60-80 ℃.
6. The method for preparing the snowflake-shaped devitrified ceramic glaze according to claim 1, wherein the heating rate in the firing process of the JS glaze ceramic biscuit applied in the step 5 is 3-5 ℃/min.
7. The method for preparing the snowflake-shaped devitrification ceramic glaze according to claim 1, wherein the heat preservation time in the firing process of the JS glaze ceramic biscuit in the step 5 is 20-30min.
8. The method for preparing the snowflake-shaped devitrified ceramic glaze according to claim 1, wherein the post-firing cooling condition of the JS glaze ceramic biscuit applied in the step 5 is furnace cooling.
9. The method for preparing the snowflake-shaped devitrified ceramic glaze according to claim 1, wherein the obvious devitrified area is visible by scanning electron microscope of the glaze layer of the snowflake-shaped devitrified ceramic glaze product obtained in the step 5.
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