A low-temperature kiln-changed glaze and preparation method thereof, artistic ceramics and preparation method thereof

Abstract

The present invention provides a low-temperature kiln-changed glaze and a preparation method thereof, and an artistic ceramic and a preparation method thereof. The raw materials of the low-temperature kiln-changed glaze include, by mass percentage, 56-75% lead silicate, 1-9% quartz, 3-6% calcite, 0-5% barium carbonate, 8-16% titanium dioxide, 10-18% calcined zinc oxide, 0-5% strontium carbonate, and 0-6% zirconium silicate. The present invention can reduce the overall temperature of the kiln-changed glaze by adding lead silicate to the raw materials of the low-temperature kiln-changed glaze, so as to facilitate the crystallization effect at a lower temperature, and the lead silicate has a wider melting temperature range; at the same time, the calcined zinc oxide and titanium dioxide in the raw materials will produce crystallization effects in different forms, so that the kiln-changed effect is more abundant, and the problems of high firing temperature, long firing time and fewer types of kiln-changed effects of the kiln-changed glaze in the prior art are solved.

Description

Technical Field

[0001] The invention relates to the technical field of ceramics, and in particular to a low-temperature kiln-changed glaze and a preparation method thereof, and artistic ceramics and a preparation method thereof. Background Art

[0002] Kiln-changed glaze ceramic products are a kind of artistic ceramics that can give people a beautiful and shocking visual experience, but their craftsmanship is demanding and complex.

[0003] Traditional kiln-changed glazes are fired at medium to high temperatures, with firing temperatures above 1200°C and firing times of more than 12 hours. The high firing temperature, long firing time, and large energy consumption result in high production costs. Most kiln-changed glazes are colored with oxides such as titanium oxide, iron oxide, cobalt oxide, nickel oxide, copper oxide, and manganese oxide. The color adjustment is relatively complex, the color system is incomplete, and the firing range is narrow. Most bright red kiln-changed glazes require the addition of iron oxide and copper oxide in a reducing atmosphere to achieve a red kiln-changed effect. In an ordinary oxidizing atmosphere, bright red and golden kiln-changed effects are difficult to achieve.

[0004] Therefore, the prior art has defects and needs to be improved and developed. Summary of the invention

[0005] The technical problem to be solved by the present invention is that, in view of the above-mentioned defects of the prior art, a low-temperature kiln-changed glaze and a preparation method thereof, artistic ceramics and a preparation method thereof are provided, aiming to solve the problems in the prior art that the kiln-changed glaze has high firing temperature, long firing time and few types of kiln-changed effects.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0007] In a first aspect of the present application, an embodiment provides a low-temperature kiln-changed glaze, wherein the raw materials of the low-temperature kiln-changed glaze, calculated by mass percentage, include:

[0008] Lead silicate 56-75%, quartz 1-9%, calcite 3-6%, barium carbonate 0-5%, titanium dioxide 8-16%, calcined zinc oxide 10-18%, strontium carbonate 0-5%, zirconium silicate 0-6%.

[0009] In one embodiment of the present application, the chemical components of the low-temperature kiln-changed glaze, measured by mass percentage, include:

[0010] SiO2 7~16%, PbO 50~68%, Al2O3 0~0.5%, CaO+MgO 1~4%, K2O+Na2O 0~1%, Fe2O3 0~1%, TiO2 6~14%, ZnO 3~14%, BaO 0~3%, SrO 0~3%, ZrO2 0~4%.

[0011] A second aspect of the present application provides a method for preparing the low-temperature kiln-changed glaze as described above, comprising:

[0012] The raw materials of low-temperature kiln-changed glaze are mixed according to 56-75% of lead silicate, 1-9% of quartz, 3-6% of calcite, 0-5% of barium carbonate, 8-16% of titanium dioxide, 10-18% of calcined zinc oxide, 0-5% of strontium carbonate and 0-6% of zirconium silicate to obtain a mixed powder;

[0013] After adding a solvent to the mixed powder, the mixed powder is subjected to ball milling, sieving and drying to obtain glaze powder;

[0014] The glaze powder is blended to a predetermined consistency using oily printing ink and camphor oil to obtain a low-temperature kiln-changed glaze.

[0015] In one embodiment of the present application, the raw materials of the low-temperature kiln-changed glaze are mixed according to 56-75% lead silicate, 1-9% quartz, 3-6% calcite, 0-5% barium carbonate, 8-16% titanium dioxide, 10-18% calcined zinc oxide, 0-5% strontium carbonate, and 0-6% zirconium silicate to obtain a mixed powder, and further include:

[0016] The raw materials of low-temperature kiln-changed glaze are mixed according to 56-75% of lead silicate, 1-9% of quartz, 3-6% of calcite, 0-5% of barium carbonate, 8-16% of titanium dioxide, 10-18% of calcined zinc oxide, 0-5% of strontium carbonate, and 0-6% of zirconium silicate, and a coloring substance is added to obtain a mixed powder;

[0017] Among them, the coloring substance is a high-temperature pigment or a coloring oxide; the high-temperature pigment includes: one or more of wrapped scarlet, wrapped golden yellow, iron oxide red and chromium oxide green; the coloring oxide includes: one or more of copper oxide, manganese oxide, nickel oxide, vanadium pentoxide and cobalt oxide.

[0018] In one embodiment of the present application, after adding a solvent to the mixed powder, ball milling, sieving and drying are performed to obtain a glaze powder, comprising:

[0019] Adding water and carboxymethyl cellulose to the mixed powder and then ball milling, the fineness of the glaze slurry after ball milling is less than or equal to 0.2% on a 250-mesh sieve;

[0020] The ball-milled glaze slurry is sieved and then microwave-dried to obtain a block glaze;

[0021] The block glaze is ground and passed through a 100-mesh sieve to obtain glaze powder.

[0022] A third aspect of the present application provides a method for preparing artistic ceramics, which includes:

[0023] preparing a ceramic body, and firing the ceramic body in a kiln to obtain a ceramic painting substrate;

[0024] Using the low-temperature kiln-changed glaze as described above to paint on the surface of the ceramic painting substrate;

[0025] The painted ceramic painting substrate is dried in a drying kiln and then fired in a roller kiln.

[0026] In one embodiment of the present application, the method of preparing a ceramic body and firing the ceramic body in a kiln to obtain a ceramic painting substrate comprises:

[0027] The raw materials for the blank are mixed with minerals, water, water glass and sodium tripolyphosphate are added, and the mixture is ball-milled in a ball mill to obtain a slurry with a fineness of 0.5-1.2% of the residue on a 300-mesh sieve;

[0028] After the slurry is aged for 24 hours, spray granulation is performed to obtain a green body powder, and the green body powder is pressed and molded to obtain a molded green body;

[0029] The formed green body is dried in a drying kiln to obtain a ceramic green body, wherein the moisture entering the kiln is less than or equal to 0.8% and the temperature leaving the kiln is 110° C.;

[0030] The ceramic body is put into a kiln for firing to obtain a ceramic painting substrate, wherein the firing temperature of the ceramic body is 1220-1240° C., the firing time is 35-45 minutes, and the water absorption rate of the fired ceramic painting substrate is less than or equal to 0.5%.

[0031] In one embodiment of the present application, the mineral raw materials for the blank include, by mass percentage:

[0032] High temperature aluminum sand 8-13%, aluminum potassium sand 10-23%, water grinding sand 20-37%, magnesia 3-7%, black mud 1-4%, waste porcelain powder 1-5%, bentonite 5-8%, stone powder 10-27%;

[0033] The chemical components of the ceramic body, measured by mass percentage, include:

[0034] SiO2 63~70%, Al2O3 17~22%, CaO+MgO 1~3%, K2O+Na2O 3~5%, Fe2O3 0~2%, TiO2 0~1%, loss on ignition 4~8%.

[0035] In one embodiment of the present application, the painted ceramic painting substrate is dried in a drying kiln and then fired in a roller kiln, comprising:

[0036] The painted ceramic painting substrate is dried in a drying kiln and then placed in a roller kiln for firing in an oxidizing atmosphere at a firing temperature of 950 to 1070° C. and a firing cycle of 60 to 90 minutes.

[0037] A fourth aspect of the present application provides an artistic ceramic, wherein the artistic ceramic is prepared based on the preparation method of the artistic ceramic as described above.

[0038] The present invention discloses a low-temperature kiln-changed glaze and a preparation method thereof, and an artistic ceramic and a preparation method thereof. The raw materials of the low-temperature kiln-changed glaze include, by mass percentage, 56-75% lead silicate, 1-9% quartz, 3-6% calcite, 0-5% barium carbonate, 8-16% titanium dioxide, 10-18% calcined zinc oxide, 0-5% strontium carbonate, and 0-6% zirconium silicate. The present invention can reduce the overall temperature of the kiln-changed glaze by adding lead silicate to the raw materials of the low-temperature kiln-changed glaze, so as to facilitate the crystallization effect at a lower temperature, and the lead silicate has a wider melting temperature range; at the same time, the calcined zinc oxide and titanium dioxide in the raw materials will produce crystallization effects of different forms, so that the kiln-changed effect is more abundant, and the problems of high firing temperature, long firing time and fewer types of kiln-changed effects of the kiln-changed glaze in the prior art are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The present invention is a flow chart of a preferred embodiment of a method for preparing a low-temperature kiln-changed glaze.

[0040] Figure 2 It is a kiln-change effect diagram of Example 1 in the present invention.

[0041] Figure 3 It is a kiln-change effect diagram of Example 2 of the present invention.

[0042] Figure 4 It is a kiln-change effect diagram of Example 3 of the present invention.

[0043] Figure 5 It is a kiln-change effect diagram of Example 4 in the present invention.

[0044] Figure 6 This is a kiln-change effect diagram of Example 5 of the present invention.

[0045] Figure 7 It is a kiln-change effect diagram of Example 6 of the present invention. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention clearer and more specific, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] The first aspect of the present application provides a low-temperature kiln-changed glaze, wherein the raw materials of the low-temperature kiln-changed glaze, calculated by mass percentage, include:

[0048] Lead silicate 56-75%, quartz 1-9%, calcite 3-6%, barium carbonate 0-5%, titanium dioxide 8-16%, calcined zinc oxide 10-18%, strontium carbonate 0-5%, zirconium silicate 0-6%.

[0049] Specifically, the lead silicate added to the raw materials of the low-temperature kiln-fired glaze is a frit; the use of lead silicate frit can reduce the overall temperature of the kiln-fired glaze, making it easier to produce crystallization effects at lower temperatures. At the same time, lead silicate has a wider melting temperature range, which is also more conducive to crystallization in the low temperature range.

[0050] Quartz appears as quartz glass phase in high-lead glaze. As the quartz content increases, the melting temperature of the glaze slowly rises, the viscosity of the glaze melt gradually increases, and the kiln-changing effect will become worse and worse.

[0051] One or more carbonate calcite, barium carbonate and strontium carbonate are present in the formula, and their main function is to adjust the temperature and viscosity of the glaze melt, so as to facilitate better crystallization effect of the glaze melt in the low temperature range; the same content of strontium carbonate can replace barium carbonate and calcite to make the kiln-fired glaze have a better matte effect; zirconium silicate mainly plays a whitening effect in the glaze, and the addition of a small amount of zirconium silicate helps to enrich the white color effect.

[0052] In the embodiment of the present application, calcined zinc oxide and titanium dioxide are added to the raw materials of the low-temperature kiln-changed glaze. The titanium dioxide in the embodiment of the present application is rutile titanium dioxide. The two will produce different forms of crystallization effects, making the kiln-changed effect richer. In the embodiment of the present application, rutile titanium dioxide is titanium oxide. The content of titanium oxide mainly affects the formation of crystals. When the content of titanium oxide increases from 0% to 14%, the crystals gradually increase from nothing to the glaze surface. Titanium is a metal element with a large relative atomic mass. Its oxide constitutes an acidic component in the glaze. If the acidity of the glaze is increased, the crystallization rate can be increased. Although titanium, as a better crystallizer, can produce excellent crystals, if too much is added, too many crystal nuclei will be produced, causing the glaze to be unable to grow in a short time, resulting in a dull glaze surface, making the glaze surface look like an unfired state. Therefore, it is generally required that a certain amount of titanium oxide is contained in the glaze, which will be supersaturated at high temperature to form a crystalline glaze with good crystallization ability. Zinc oxide makes the glaze fusible, reduces the firing temperature of the glaze, can increase the gloss and whiteness of the glaze, and increase the maturity range of the glaze. When the zinc oxide content reaches saturation in the glaze, zinc oxide crystallizes.

[0053] Therefore, the embodiment of the present application can reduce the overall temperature of the kiln-changed glaze by adding lead silicate to the raw materials of the low-temperature kiln-changed glaze, thereby facilitating the crystallization effect at a lower temperature. At the same time, lead silicate has a wider melting temperature range. At the same time, the calcined zinc oxide and titanium dioxide in the raw materials will produce crystallization effects in different forms, making the kiln-changed effect richer.

[0054] In a specific embodiment of the present application, the chemical components of the low-temperature kiln-changed glaze, measured by mass percentage, include:

[0055] SiO2 7~16%, PbO 50~68%, Al2O3 0~0.5%, CaO+MgO 1~4%, K2O+Na2O 0~1%, Fe2O3 0~1%, TiO2 6~14%, ZnO 3~14%, BaO 0~3%, SrO 0~3%, ZrO2 0~4%.

[0056] The second aspect of the present application also provides a method for preparing a low-temperature kiln-changed glaze, such as Figure 1 As shown, the preparation method of the low-temperature kiln-changed glaze comprises:

[0057] Step S100, mixing the raw materials of low-temperature kiln-changed glaze according to 56-75% lead silicate, 1-9% quartz, 3-6% calcite, 0-5% barium carbonate, 8-16% titanium dioxide, 10-18% calcined zinc oxide, 0-5% strontium carbonate, and 0-6% zirconium silicate to obtain a mixed powder.

[0058] In the embodiment of the present application, in the step S100, the raw materials of the low-temperature kiln-changed glaze are mixed according to 56-75% lead silicate, 1-9% quartz, 3-6% calcite, 0-5% barium carbonate, 8-16% titanium dioxide, 10-18% calcined zinc oxide, 0-5% strontium carbonate, and 0-6% zirconium silicate, and a coloring substance is added to obtain a mixed powder. The coloring substance is a high-temperature pigment or a coloring oxide; the high-temperature pigment includes: one or more of wrapped scarlet, wrapped golden yellow, iron oxide red, and chromium oxide green; the coloring oxide includes: one or more of copper oxide, manganese oxide, nickel oxide, vanadium pentoxide, and cobalt oxide.

[0059] Specifically, lead silicate, quartz, calcite, barium carbonate, strontium carbonate, rutile titanium dioxide, and calcined zinc oxide can be directly mixed as basic raw materials to obtain a mixed powder. Coloring substances can also be added to obtain kiln-changed glazes with different color effects. Wrapped red, wrapped golden yellow, iron oxide red, and chromium oxide green are all high-temperature inorganic pigments for ceramics. The embodiments of the present application can use a certain inorganic pigment alone, or can mix multiple inorganic pigments to obtain synthetic pigments of other colors.

[0060] After fixing the ratio of the basic raw materials, when adding coloring high-temperature pigments, the mass percentages are: 4-12% of wrapped scarlet, 5-14% of wrapped golden yellow, 1-6% of red iron oxide, and 1-4% of chromium oxide green; when adding coloring oxides, the mass percentages are: 0.4-6%; this can achieve a better coloring effect.

[0061] The embodiments of the present application use different inorganic pigments to add into the kiln-changed glaze, thereby obtaining a kiln-changed glaze with good color development effect and good kiln-changed effect. At the same time, the colors can be mixed to adjust the intermediate colors, thereby obtaining a more diverse color effect.

[0062] like Figure 1 As shown, the method for preparing the low-temperature kiln-changed glaze also includes:

[0063] Step S200: After adding a solvent to the mixed powder, the mixed powder is subjected to ball milling, sieving and drying to obtain glaze powder.

[0064] In an embodiment of the present application, step S200 specifically includes: adding water and carboxymethyl cellulose to the mixed powder and then ball milling, wherein the fineness of the glaze slurry after ball milling is less than or equal to 0.2% of the residue on a 250-mesh sieve; after sieving the glaze slurry after ball milling, microwave drying is performed to obtain a block glaze; after grinding the block glaze, passing it through a 100-mesh sieve to obtain glaze powder.

[0065] Specifically, according to the raw material ratio of kiln-changed glaze, an appropriate amount of water and 0.3% carboxymethyl cellulose (CMC) are added for ball milling, wherein high-temperature pigments and coloring oxides can be ground together with the basic raw materials, and the colors are brighter and more uniform after grinding; the fineness of the glaze slurry after ball milling is 250 mesh sieve residue ≤ 0.2%.

[0066] The fineness of the calcined zinc oxide in the basic raw material is 80 mesh sieve residue. In order to ensure the kiln-changing effect, the calcined zinc oxide is added last during ball milling. After a short period of ball milling and mixing, the slurry can be discharged. The fineness of the overall glaze slurry is 100 mesh sieve to prevent the zinc oxide particles from being too small and melting in the glaze melt, which is not conducive to the growth of crystals. After the ball-milled glaze slurry is sieved, it is microwave-dried into blocks, and then ground and sieved through a 100 mesh sieve into powder.

[0067] The embodiment of the present application can significantly improve the fluidity of the glaze slurry by adding carboxymethyl cellulose, making the glaze slurry easier to mix evenly during the ball milling process, reducing the friction and resistance between particles, thereby improving the ball milling efficiency; and can enhance the adhesion between the glaze surface and the body, reducing the shedding and defects of the glaze layer in the subsequent process. The embodiment of the present application also grinds the block glaze and passes it through a 100-mesh sieve to obtain a glaze powder with uniform particle size and moderate fineness, which makes it easier to form a uniform and smooth glaze layer during the glazing process.

[0068] like Figure 1As shown, the method for preparing the low-temperature kiln-changed glaze also includes:

[0069] Step S300: using oily printing ink and camphor oil to blend the glaze powder to a predetermined consistency to obtain a low-temperature kiln-changed glaze.

[0070] Specifically, a certain amount of oily printing ink and camphor oil are added, and the glaze powder is blended to a suitable consistency before artistic painting. That is, in the embodiment of the present application, different oxides, frits, and pigments are mixed in a certain proportion, and after adding a suitable amount of solvent and ball-milling to a certain fineness, the mixture is sieved, dried, and prepared into powder, and printing ink is added to blend to a suitable consistency for painting creation.

[0071] The embodiments of the present application use oily printing ink and camphor oil as solvents, which helps to better mix the components in the glaze powder, reduce the agglomeration phenomenon between particles, and improve the overall uniformity of the glaze; moreover, the addition of solvents can stabilize the performance of the glaze, prevent stratification or precipitation in subsequent processing, and ensure the stable quality of the glaze.

[0072] The crystalline components in the low-temperature kiln-fired glaze are mainly lead calcium titanate and lead zinc silicate, and the rest are amorphous substances. The phase detection results of the low-temperature kiln-fired glaze are shown in Table 1.

[0073] Table 1

[0074]

[0075] The low-temperature kiln-changed glaze prepared in the embodiment of the present application has rich glaze colors and is easy to adjust, which is convenient for artists to paint ceramics and conforms to the current roller kiln firing system, thereby achieving better cultural and artistic effects.

[0076] The third aspect of the present application also provides a method for preparing artistic ceramics, comprising: preparing a ceramic body, firing the ceramic body in a kiln to obtain a ceramic painting substrate; painting on the surface of the ceramic painting substrate using the low-temperature kiln-changed glaze as described above; and drying the painted ceramic painting substrate in a drying kiln and firing it in a roller kiln.

[0077] Specifically, artistic paintings can be divided into single-layer and multi-layer paintings according to the artistic effect, ensuring that the glaze layer thickness is between 0.4-1.3mm to have a good kiln-changing effect.

[0078] In the embodiment of the present application, the ceramic body is fired to achieve high-temperature vitrification; after the painting is completed, the painted ceramic painting substrate is fired again to achieve low-temperature glazing. Therefore, the embodiment of the present application adopts a secondary firing process, i.e., high-temperature vitrification and low-temperature glazing, to ensure the splicing alignment effect of large murals, and has a better effect on large-scale products, especially rock slabs.

[0079] In an embodiment of the present application, the preparation of a ceramic body, firing the ceramic body in a kiln to obtain a ceramic painting substrate, includes: mixing a mineral raw material for the body, adding water, water glass and sodium tripolyphosphate, and ball-milling in a ball mill to obtain a slurry with a fineness of 300 mesh residue of 0.5-1.2%; aging the slurry for 24 hours, spray granulating to obtain a body powder, and pressing the body powder to obtain a molded body; drying the molded body in a drying kiln to obtain a ceramic body, wherein the moisture entering the kiln is less than or equal to 0.8%, and the kiln outlet temperature is 110°C; firing the ceramic body in a kiln to obtain a ceramic painting substrate, wherein the firing temperature of the molded body is 1220-1240°C, the firing time is 35-45 minutes, and the water absorption rate of the ceramic painting substrate after firing is less than or equal to 0.5%.

[0080] The different blanks of the present invention are made of mineral raw materials through ball milling, powdering, aging, pressing, drying, and high-temperature firing to form porcelain unglazed bricks as ceramic painting substrates. Artwork is created on the surface of the prepared painting substrates, and then they are dried in a drying kiln and fired in a roller kiln.

[0081] Specifically, after the blank is prepared according to the blank formula, an appropriate amount of water is added, 0.3-0.5% water glass and sodium tripolyphosphate are added as debonding agents, and the blank is input into a ball mill to be ball-milled into a slurry with a fineness of 0.5-1.2% of the residue on a 300-mesh sieve, and spray granulation is performed after aging for 24 hours to obtain a blank powder. After the blank powder is aged, it is formed by a large-tonnage press and dried in a drying kiln. The temperature out of the drying kiln is 110°C, and the water content in the kiln is ≤0.8%. The maximum firing temperature of the ceramic blank is 1220-1240°C, the firing time is 35-45 minutes, and the water absorption rate of the fired porcelain unglazed brick is ≤0.5%.

[0082] The embodiment of the present application ball-mills the raw materials to a 300-mesh sieve with a residue of 0.5-1.2%, so that the raw material particles are refined, which helps to increase the density and strength of the green body; water glass, as a deflocculating agent, can reduce the viscosity of the mud, improve the fluidity of the mud, and make the spray granulation process smoother. In addition, water glass has a certain adhesiveness, which helps to increase the strength of the green body; sodium tripolyphosphate, as a debonding agent, can further reduce the viscosity of the mud and improve the fluidity of the mud. The embodiment of the present application also controls the moisture entering the kiln to ≤0.8%, and the kiln outlet temperature to 110°C, to ensure that the green body reaches a suitable dry state before firing, and to reduce defects such as cracking during the firing process; the maximum firing temperature of the ceramic green body of the embodiment of the present application is 1220-1240°C, and the firing time is 35-45 minutes, achieving high-temperature vitrification.

[0083] In the embodiment of the present application, the mineral raw materials for the blank include, by mass percentage:

[0084] High-temperature aluminum sand 8-13%, aluminum potassium sand 10-23%, water-abrasive sand 20-37%, magnesia 3-7%, black mud 1-4%, waste porcelain powder 1-5%, bentonite 5-8%, stone powder 10-27%.

[0085] The chemical components of the green body are calculated by mass percentage and include:

[0086] SiO2 63~70%, Al2O3 17~22%, CaO+MgO 1~3%, K2O+Na2O 3~5%, Fe2O3 0~2%, TiO2 0~1%, loss on ignition 4~8%.

[0087] The raw mineral materials for the blanks in the present application include: high-temperature aluminum sand, aluminum potassium sand, water-ground sand, magnesia, black mud, waste porcelain powder, bentonite, stone powder, etc. The stone powder is pre-crushed before ball milling to ensure that the fineness of the stone powder after ball milling is within a suitable range, thereby improving the ball milling efficiency and reducing energy consumption.

[0088] In one embodiment of the present application, the painted ceramic painting substrate is dried in a drying kiln and then placed in a roller kiln for firing, comprising: after the painted ceramic painting substrate is dried in a drying kiln, placed in a roller kiln and fired in an oxidizing atmosphere with a firing temperature of 950-1070°C and a firing cycle of 60-90 minutes.

[0089] The firing range of the kiln-changed glaze in the embodiment of the present application is between 950-1070°C, the firing temperature range is wide, the surface has a good kiln-changed effect after firing, the effect is stable, and the price is low.

[0090] The present invention achieves the following effects:

[0091] First, the embodiment of the present application prepares a low-temperature kiln-changed glaze by adjusting the formula, with a firing temperature between 950-1070°C and a better kiln-changed effect.

[0092] Second, the kiln-changed glaze prepared in the embodiment of the present application is suitable for low-temperature secondary firing process, and has a better cost advantage than high-temperature kiln-changed glaze, is low in price, and is economical and durable.

[0093] Third, the kiln-changed glaze prepared in the embodiment of the present application adopts a secondary firing process, which has a better splicing effect and will not produce obvious dislocation, thereby ensuring the artistic effect of large-scale art paintings.

[0094] Fourth, the kiln-changed glaze prepared in the embodiment of the present application is blended with oily printing oil, which can better adjust the consistency and facilitate the depiction of artistic details.

[0095] Fifth, the kiln-changed glaze prepared in the embodiment of the present application can be adjusted in color by inorganic pigments, and intermediate colors can be produced by mixing and superimposing different colors. It is rich in colors and is convenient for artists to create art.

[0096] The fourth aspect of the present application further provides an artistic ceramic, which is prepared based on the preparation method of the artistic ceramic as described above.

[0097] Specific embodiments are listed below for illustration.

[0098] Embodiment 1

[0099] Take 62g of lead silicate, 3g of quartz, 5g of calcite, 1g of barium carbonate, 12g of titanium dioxide, 14g of calcined zinc oxide, and 0.6g of copper oxide, add appropriate amount of grinding aid, ball mill, dry, and mix with printing oil to a suitable thin and thick state, apply it to the surface of vitrified unglazed tiles, and burn it in a roller kiln at 1050℃. The surface will have a good kiln-changing effect; the kiln-changing effect is as follows: Figure 2 shown.

[0100] Embodiment 2

[0101] Take 55g of lead silicate, 3g of quartz, 3g of calcite, 3g of barium carbonate, 10g of titanium dioxide, 12g of calcined zinc oxide, and 1.5g of cobalt oxide, add appropriate amount of grinding aid, mix them into appropriate thin and thick state through ball milling, drying, and printing oil, apply them to the surface of vitrified unglazed tiles, and burn them in a roller kiln at 1050℃. The surface will have a good kiln-changing effect; the kiln-changing effect is as follows: Figure 3 shown.

[0102] Embodiment 3

[0103] Take 68g of lead silicate, 3g of quartz, 5g of calcite, 10g of titanium dioxide, 13g of calcined zinc oxide, and 7g of wrapped red, add appropriate amount of grinding aid, mix them into appropriate thin and thick state after ball milling, drying, and printing oil, apply them to the surface of vitrified unglazed tiles, and burn them in a roller kiln at 1050℃. The surface will have a good kiln-changing effect; the kiln-changing effect is as follows: Figure 4 shown.

[0104] Embodiment 4

[0105] Take 64g of lead silicate, 7g of quartz, 5g of calcite, 12g of titanium dioxide, 12g of calcined zinc oxide, and 9g of wrapped gold, add appropriate amount of grinding aid, mix to a suitable thin and thick state after ball milling, drying, and printing oil, apply to the surface of vitrified unglazed tiles, and burn in a roller kiln at 1050℃. The surface will have a good kiln-changing effect; the kiln-changing effect is as follows: Figure 5 shown.

[0106] Embodiment 5

[0107] Take 62g of lead silicate, 8g of quartz, 5g of calcite, 10g of titanium dioxide, 12g of calcined zinc oxide, and 1.2g of manganese dioxide, add appropriate amount of grinding aid, mix them into appropriate thin and thick state after ball milling, drying, and printing oil, apply them to the surface of vitrified unglazed tiles, and burn them in a roller kiln at 1050℃. The surface will have a good kiln-changing effect; the kiln-changing effect is as follows: Figure 6 shown.

[0108] Embodiment 6

[0109] Take 62g of lead silicate, 3g of quartz, 6g of calcite, 3g of barium carbonate, 5g of zirconium silicate, 10g of titanium dioxide, and 12g of calcined zinc oxide, add appropriate amount of grinding aid, mix them into appropriate thin and thick state through ball milling, drying, and printing oil, apply them to the surface of porcelain unglazed tiles, and burn them in a roller kiln at 1050℃. The surface will have a good kiln-changing effect; the kiln-changing effect is as follows: Figure 7 shown.

[0110] The present invention provides a low-temperature kiln-changed glaze and a preparation method thereof, and an artistic ceramic and a preparation method thereof. The raw materials of the low-temperature kiln-changed glaze include, by mass percentage, 56-75% lead silicate, 1-9% quartz, 3-6% calcite, 0-5% barium carbonate, 8-16% titanium dioxide, 10-18% calcined zinc oxide, 0-5% strontium carbonate, and 0-6% zirconium silicate. The present invention can reduce the overall temperature of the kiln-changed glaze by adding lead silicate to the raw materials of the low-temperature kiln-changed glaze, so as to facilitate the crystallization effect at a lower temperature, and the lead silicate has a wider melting temperature range; at the same time, the calcined zinc oxide and titanium dioxide in the raw materials will produce crystallization effects in different forms, so that the kiln-changed effect is more abundant, and the problems of high firing temperature, long firing time and fewer types of kiln-changed effects of the kiln-changed glaze in the prior art are solved.

[0111] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A low-temperature kiln-changed glaze, characterized in that: The raw materials of the low-temperature kiln-changed glaze include, by mass percentage: Lead silicate 56-75%, quartz 1-9%, calcite 3-6%, barium carbonate 0-5%, titanium dioxide 8-16%, calcined zinc oxide 10-18%, strontium carbonate 0-5%, zirconium silicate 0-6%.

2. The low-temperature kiln-changed glaze according to claim 1, characterized in that: The chemical components of the low-temperature kiln-changed glaze include, by mass percentage: SiO2 7~16%, PbO 50~68%, Al2O3 0~0.5%, CaO+MgO 1~4%, K2O+Na2O 0~1%, Fe2O3 0~1%, TiO2 6~14%, ZnO 3~14%, BaO 0~3%, SrO 0~3%, ZrO2 0~4%.

3. A method for preparing a low-temperature kiln-changed glaze as claimed in claim 1 or 2, characterized in that: include: The raw materials of low-temperature kiln-changed glaze are mixed according to 56-75% of lead silicate, 1-9% of quartz, 3-6% of calcite, 0-5% of barium carbonate, 8-16% of titanium dioxide, 10-18% of calcined zinc oxide, 0-5% of strontium carbonate and 0-6% of zirconium silicate to obtain a mixed powder; After adding a solvent to the mixed powder, the mixed powder is subjected to ball milling, sieving and drying to obtain glaze powder; The glaze powder is blended to a predetermined consistency using oily printing ink and camphor oil to obtain a low-temperature kiln-changed glaze.

4. The method for preparing low-temperature kiln-changed glaze according to claim 3, characterized in that: The raw materials of the low-temperature kiln-changed glaze are mixed according to 56-75% lead silicate, 1-9% quartz, 3-6% calcite, 0-5% barium carbonate, 8-16% titanium dioxide, 10-18% calcined zinc oxide, 0-5% strontium carbonate, and 0-6% zirconium silicate to obtain a mixed powder, and further include: The raw materials of low-temperature kiln-changed glaze are mixed according to 56-75% of lead silicate, 1-9% of quartz, 3-6% of calcite, 0-5% of barium carbonate, 8-16% of titanium dioxide, 10-18% of calcined zinc oxide, 0-5% of strontium carbonate, and 0-6% of zirconium silicate, and a coloring substance is added to obtain a mixed powder; Among them, the coloring substance is a high-temperature pigment or a coloring oxide; the high-temperature pigment includes: one or more of wrapped scarlet, wrapped golden yellow, iron oxide red and chromium oxide green; the coloring oxide includes: one or more of copper oxide, manganese oxide, nickel oxide, vanadium pentoxide and cobalt oxide.

5. The method for preparing low-temperature kiln-changed glaze according to claim 3, characterized in that: After adding a solvent to the mixed powder, ball milling, sieving and drying are performed to obtain glaze powder, including: Adding water and carboxymethyl cellulose to the mixed powder and then ball milling, the fineness of the glaze slurry after ball milling is less than or equal to 0.2% on a 250-mesh sieve; The ball-milled glaze slurry is sieved and then microwave-dried to obtain a block glaze; The block glaze is ground and passed through a 100-mesh sieve to obtain glaze powder.

6. A method for preparing artistic ceramics, characterized in that: include: preparing a ceramic body, and firing the ceramic body in a kiln to obtain a ceramic painting substrate; Using the low-temperature kiln-changed glaze as claimed in claim 1 or 2 to paint on the surface of the ceramic painting substrate; The painted ceramic painting substrate is dried in a drying kiln and then fired in a roller kiln.

7. The method for preparing artistic ceramics according to claim 6, characterized in that: The method of preparing a ceramic body and firing the ceramic body in a kiln to obtain a ceramic painting substrate comprises: The raw materials for the blank are mixed, water, water glass and sodium tripolyphosphate are added, and the mixture is ball-milled in a ball mill to obtain a slurry with a fineness of 0.5-1.2% of the residue on a 300-mesh sieve; After the slurry is aged for 24 hours, spray granulation is performed to obtain a green body powder, and the green body powder is pressed and molded to obtain a molded green body; The formed green body is dried in a drying kiln to obtain a ceramic green body, wherein the moisture entering the kiln is less than or equal to 0.8% and the temperature leaving the kiln is 110° C.; The ceramic body is put into a kiln for firing to obtain a ceramic painting substrate, wherein the firing temperature of the ceramic body is 1220-1240° C., the firing time is 35-45 minutes, and the water absorption rate of the fired ceramic painting substrate is less than or equal to 0.5%.

8. The method for preparing artistic ceramics according to claim 7, characterized in that: The mineral raw materials for the blank include, by mass percentage: High temperature aluminum sand 8-13%, aluminum potassium sand 10-23%, water grinding sand 20-37%, magnesia 3-7%, black mud 1-4%, waste porcelain powder 1-5%, bentonite 5-8%, stone powder 10-27%; The chemical components of the ceramic body, measured by mass percentage, include: SiO2 63~70%, Al2O3 17~22%, CaO+MgO 1~3%, K2O+Na2O 3~5%, Fe2O3 0~2%, TiO2 0~1%, loss on ignition 4~8%.

9. The method for preparing artistic ceramics according to claim 6, characterized in that: The painted ceramic painting substrate is dried in a drying kiln and then placed in a roller kiln for firing, comprising: The painted ceramic painting substrate is dried in a drying kiln and then placed in a roller kiln for firing in an oxidizing atmosphere at a firing temperature of 950 to 1070° C. and a firing cycle of 60 to 90 minutes.

10. An artistic ceramic, characterized in that: The artistic ceramic is prepared based on the preparation method of the artistic ceramic according to any one of claims 6 to 9.

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