Crystal glaze ceramic decoration product and preparation method thereof

Abstract

The invention discloses a crystal glaze ceramic decorative product and a preparation method thereof. The crystal glaze ceramic decorative product comprises a green body layer, a cover glaze layer and a crystal glaze layer which are sequentially arranged, wherein the crystal glaze layer is prepared from the following raw material components in percentage by weight: 25 to 35 percent of ZnO, 1 to 5 percent of calcined talc, 20 to 30 percent of limestone, 1 to 6 percent of washed kaolin, 25 to 40 percent of albite, 1 to 10 percent of glass powder and 0 to 5 percent of pigment; the crystal glaze material is prepared from the following chemical components in percentage by weight: 5 to 10 percent of Al2O3, 50 to 60 percent of SiO2, 0.1 to 0.3 percent of Fe2O3, 0.1 to 0.3 percent of TiO2, 10 to 20 percent of CaO, 0.5 to 3 percent of MgO, 0.5 to 1 percent of K2O, 2.4 to 4 percent of Na2O and 25 to 35 percent of ZnO. The crystal glaze material is low in firing temperature and short in firing period, crystal flowers on an obtained glaze layer are uniform in distribution, proper in size and good in decoration effect, and the glaze crack resistance of a glaze surface is improved by adjusting the thermal expansion performance of the crystal glaze material.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic building materials, and in particular to a crystalline glaze ceramic decorative product and a preparation method thereof. Background Art

[0002] Crystalline glaze refers to a glaze with obvious coarse crystals. Crystalline glaze is a highly decorative artistic glaze that originated from the colored glaze in ancient my country. The fundamental characteristic of crystallized glaze, which is different from ordinary glaze, is that it contains a certain number of visible crystals, which partially crystallize during firing to form crystals of various types, sizes and shapes. The crystal flowers of crystallized glaze can be large or small, more or less, and the distribution of crystal flowers can be reasonably controlled by artificial methods. As a high-end ceramic art glaze, the beautiful and novel natural crystal flowers of crystallized glaze, as well as its diverse appearance and colorful colors, give people a strong artistic effect.

[0003] At present, crystalline glaze has been widely used in daily ceramics and artistic ceramics. However, when it is applied to the field of architectural ceramics, the crystallization temperature is higher than the firing temperature of architectural tiles to reach the crystal formation barrier, and long-term heat preservation is required to allow the crystal to grow fully. The firing temperature of traditional crystalline glaze is above 1250°C and the firing cycle is more than 10 hours. The high cost limits the application of crystalline glaze in the field of architectural ceramics. Therefore, the key to preparing crystalline glaze ceramic decorative products is to reduce the firing temperature and firing cycle. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a low-temperature fast-fired crystalline glaze ceramic decorative product and a preparation method thereof, so that the formed crystal flowers are large, well-shaped and evenly distributed.

[0005] In order to solve the above technical problems, the first aspect of the present invention provides a crystalline glaze ceramic decorative product, comprising a body layer, a surface glaze layer and a crystalline glaze layer arranged in sequence;

[0006] The raw material components of the crystalline glaze layer include crystalline glaze, and the raw material components of the crystalline glaze include, by weight percentage: ZnO 25-35%, calcined talc 1-5%, limestone 20-30%, washed kaolin 1-6%, albite 25-40%, glass powder 1-10%, and colorant 0-5%;

[0007] The chemical composition of the crystalline glaze includes, by weight percentage: Al2O3: 5-10%, SiO2: 50-60%, Fe2O3: 0.1-0.3%, TiO2: 0.1-0.3%, CaO: 10-20%, MgO: 0.5-3%, K2O: 0.5-1%, Na2O: 2.4-4%, and ZnO: 25-35%.

[0008] As an improvement of the above solution, the chemical composition of the glass powder includes, by weight percentage: Al2O3: 1-5%, SiO2: 40-45%, B2O3: 15-23%, and ZnO: 25-30%.

[0009] As an improvement of the above scheme, the chemical composition of the albite includes, by weight percentage: Al2O3: 14-18%, SiO2: 60-70%, TiO2: 0.01-0.2%, CaO: 0.1-0.5%, MgO: 0.1-5%, K2O: 0.5-1%, and Na2O: 9.5-12.5%.

[0010] As an improvement of the above solution, the particle size of the glass powder is 200-290 mesh;

[0011] The particle size of the zinc oxide is 200-290 meshes.

[0012] As an improvement of the above scheme, the chemical composition of the washed kaolin includes, by weight percentage: Al2O3: 35-42%, SiO2: 45-55%, Fe2O3: 0.1-1%, TiO2: 0.01-1%, CaO: 0.01-0.5%, MgO: 0.01-0.5%, K2O: 0.1-1%, and Na2O: 0.1-1%.

[0013] As an improvement of the above scheme, the chemical composition of the burned talc includes, by weight percentage: Al2O3: 1-3%, SiO2: 58-62%, Fe2O3: 0.1-0.3%, TiO2: 0.01-0.1%, CaO: 0.5-1%, MgO: 33-40%, K2O: 0.1-1%, and Na2O: 0.1-0.5%.

[0014] As an improvement of the above solution, the glaze amount of the surface glaze layer is 88-92 g / dish;

[0015] The glaze application amount of the crystalline glaze layer is 100-110 g / dish.

[0016] As an improvement of the above scheme, the raw material components of the surface glaze layer include surface glaze, and the raw material components of the surface glaze include, by weight percentage: Al2O3 15-20%, ZrSiO4 4-7%, water-abrasive 22-25%, washed ball clay 5-9%, albite powder 12-16%, quartz powder 22-28%, burned talc 2-4%, calcined kaolin 4-6%, and colorant 0-5%;

[0017] The chemical composition of the glaze includes, by weight percentage: Al2O3: 22-28%, SiO2: 50-56%, Fe2O3: 0.1-0.3%, TiO2: 0.1-0.3%, CaO: 0.5-2%, MgO: 0.1-3%, K2O: 1-3%, Na2O: 2-4%, and ZrO2: 1-3%.

[0018] As an improvement of the above scheme, the raw materials for preparing the green body layer include, by weight percentage: 25-30% potassium sodium stone powder, 4-8% black mud, 3-5% high aluminum sand, 2-4% talcum powder, 1-3% Guangxi white mud, 3-5% potassium sand, 12-15% clay, 25-30% potassium sodium feldspar, 3-5% bentonite, and 12-15% washed mud;

[0019] The chemical composition of the green body layer includes, by weight percentage: Al2O3: 16-18%, SiO2: 64-70%, Fe2O3: 0.1-1%, TiO2: 0.1-1%, CaO: 0.1-1%, MgO: 0.1-3%, K2O: 2-4%, and Na2O: 2-4%.

[0020] The second aspect of the present invention also provides a method for preparing the crystalline glaze ceramic decorative product, comprising:

[0021] (1) mixing raw materials for preparing the green body layer, pressing and molding, and drying to obtain the green body layer;

[0022] (2) preparing a top glaze and a crystal glaze, and applying the top glaze and the crystal glaze in sequence on the obtained green body layer;

[0023] (3) The obtained ceramic is sent to a kiln for firing to obtain a crystalline glaze ceramic decorative product, wherein the firing temperature is 1140-1180° C. and the firing period is 40-100 min.

[0024] The implementation of the present invention has the following beneficial effects:

[0025] In the present invention, the raw material components of the crystalline glaze layer include crystalline glaze, and the raw material components of the crystalline glaze include, by weight percentage: ZnO 25-35%, calcined talc 1-5%, limestone 20-30%, washed kaolin 1-6%, albite 25-40%, glass powder 1-10%, and colorant 0-5%. Zinc oxide is used as the main crystal forming agent, washed kaolin, glass powder, albite and zinc oxide will generate crystals at high temperature, and under the coordinated effect of limestone and calcined talc, not only can the melting temperature of the crystalline glaze be reduced, which is helpful to achieve the melting and sintering of the crystalline glaze at a lower temperature, but also the fluidity of the crystalline glaze is improved, and the crystal flowers are promoted to grow better, so as to obtain larger and evenly distributed crystal flowers with less overlap, and at the same time, the glossiness and transparency of the crystalline glaze are increased, so that the obtained crystalline glaze ceramic decorative products have good artistic effect and good decorative effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 : Firing effect diagram of the crystalline glaze ceramic decorative product obtained in Example 1 of the present invention;

[0027] Figure 2 : Firing effect diagram of the crystalline glaze ceramic decorative product obtained in Example 2 of the present invention;

[0028] Figure 3 : Firing effect diagram of the crystalline glaze ceramic decorative product obtained in Example 3 of the present invention;

[0029] Figure 4 : Firing effect diagram of the crystalline glaze ceramic decorative product obtained in Example 4 of the present invention;

[0030] Figure 5 : Firing effect diagram of the crystalline glaze ceramic decorative product obtained in Comparative Example 1 of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail with specific embodiments below.

[0032] In order to solve the above problems, the first aspect of the present invention provides a crystalline glaze ceramic decorative product, comprising a body layer, a surface glaze layer and a crystalline glaze layer arranged in sequence;

[0033] The raw material components of the crystalline glaze layer include crystalline glaze, and the raw material components of the crystalline glaze include, by weight percentage: ZnO 25-35%, burned talc 1-5%, limestone 20-30%, washed kaolin 1-6%, albite 25-40%, glass powder 1-10%, and colorant 0-5%.

[0034] The chemical composition of the crystalline glaze includes, by weight percentage: Al2O3: 5-10%, SiO2: 50-60%, Fe2O3: 0.1-0.3%, TiO2: 0.1-0.3%, CaO: 10-20%, MgO: 0.5-3%, K2O: 0.5-1%, Na2O: 2.4-4%, and ZnO: 25-35%.

[0035] In the present invention, zinc oxide is used as the main crystal forming agent, washed kaolin, glass powder and albite as well as zinc oxide can generate crystals at high temperature, and under the coordinated effect of limestone and calcined talc, the ratio of zinc oxide, limestone and albite is changed, which can not only reduce the melting temperature of the crystallized glaze, but also help to realize the melting and sintering of the crystallized glaze at a lower temperature, achieve a significant temperature reduction and shorten the firing cycle, and improve the fluidity of the crystallized glaze, promote the better growth of crystal flowers, obtain larger and evenly distributed crystal flowers with less overlap, and at the same time increase the glossiness and transparency of the crystallized glaze, so that the obtained crystallized glaze ceramic decorative products have good artistic effect and excellent decorative effect.

[0036] Preferably, the raw materials for preparing the green body layer include, by weight percentage: 25-30% potassium sodium stone powder, 4-8% black mud, 3-5% high aluminum sand, 2-4% talcum powder, 1-3% Guangxi white mud, 3-5% potassium sand, 12-15% clay, 25-30% potassium sodium feldspar, 3-5% bentonite, and 12-15% washed mud;

[0037] The chemical composition of the green body layer includes, by weight percentage: Al2O3: 16-18%, SiO2: 64-70%, Fe2O3: 0.1-1%, TiO2: 0.1-1%, CaO: 0.1-1%, MgO: 0.1-3%, K2O: 2-4%, and Na2O: 2-4%.

[0038] Furthermore, the black mud includes Lianjiang black mud and Guangdong black mud, and the weight ratio of the Lianjiang black mud to the Guangdong black mud is 1:(1-1.67). The potash sand can be Foshan potash sand, the clay is Ningde clay, and the washed mud is Foshan washed mud.

[0039] Preferably, the raw material components of the surface glaze layer include surface glaze, and the raw material components of the surface glaze include, by weight percentage: Al2O3 15-20%, ZrSiO4 4-7%, water-abrasive 22-25%, washed ball clay 5-9%, albite powder 12-16%, quartz powder 22-28%, burned talc 2-4%, calcined kaolin 4-6%, and colorant 0-5%;

[0040] The chemical composition of the glaze includes, by weight percentage: Al2O3: 22-28%, SiO2: 50-56%, Fe2O3: 0.1-0.3%, TiO2: 0.1-0.3%, CaO: 0.5-2%, MgO: 0.1-3%, K2O: 1-3%, Na2O: 2-4%, and ZrO2: 1-3%.

[0041] Furthermore, when the surface glaze is a colored surface glaze containing colorant, the addition amount of the colorant is preferably 1-5%. The colorant is generally an inorganic colorant, which may include cobalt blue, cobalt black, gray, yellow-brown, etc., and may be reasonably added according to the decorative effect.

[0042] Furthermore, the glaze application amount of the surface glaze layer is 88-92 g / dish (measured on a 300*600 mm dish).

[0043] Preferably, the zinc oxide, in the process of promoting the formation and growth of crystal flowers as a crystallizing agent, will also affect the viscosity and surface tension of the crystallized glaze, and show a good effect on the glossiness and chemical stability of the crystallized glaze layer. If the added zinc oxide content is too large, the number of crystals precipitated in the crystallized glaze layer will increase, which will lead to a decrease in the glossiness of the glaze. The weight percentage of the zinc oxide can be 25%, 27%, 29%, 31%, 33%, 35%, but is not limited to this. The zinc oxide can specifically be industrial grade zinc oxide with a purity of more than 99.5%.

[0044] Furthermore, the particle size of the zinc oxide is 200-290 meshes. If the particle size of the zinc oxide is too large, it will not react completely during the firing process and will remain. Then, during the cooling stage, it will form a uniform matrix with the main crystal carrier zinc silicate, and further develop into flower-shaped masses visible to the naked eye. Moreover, when it is mixed with the zinc oxide contained in the glass powder, it will produce different crystallization effects, affecting the artistic effect of the crystal flower. However, if the particle size of the zinc oxide is too small, it will lead to excessive crystal nucleation, which will limit the growth size and growth rate of the crystal flower, thereby affecting the shape and overlapping area of ​​the crystal flower of the resulting crystalline glaze layer, and reducing the decorative effect.

[0045] Preferably, the chemical composition of the burnt talc includes, by weight percentage: Al2O3: 1-3%, SiO2: 58-62%, Fe2O3: 0.1-0.3%, TiO2: 0.01-0.1%, CaO: 0.5-1%, MgO: 33-40%, K2O: 0.1-1%, Na2O: 0.1-0.5%. The burnt talc can provide the system with abundant magnesium elements, thereby facilitating the widening of the firing range of the green body, and the burnt talc can also reduce the hygroscopic expansion of the crystalline glaze ceramic decorative products, avoid cracking in the later stage, and effectively extend the service life of the crystalline glaze ceramic decorative products. The weight percentage of the burnt talc can be specifically 1%, 2%, 3%, 4%, 5%, but is not limited thereto.

[0046] Preferably, the limestone can be used as the main source of calcium oxide in this system, reducing the melting temperature of the crystallized glaze, improving the fluidity and coverage of the crystallized glaze, and making the crystallized glaze layer more glossy and transparent, and may also affect the growth and distribution of crystals, thereby affecting the crystallization effect of the crystallized glaze surface. When the weight percentage is 20-30%, under the action of other additives, it can promote the growth of crystal flowers, and the resulting crystallized glaze ceramic decorative products have high gloss and transparency. The weight percentage of the limestone can be 20%, 22%, 24%, 26%, 28%, 30%, but not limited to this. The limestone can be selected from industrial grade limestone, and the purity of the limestone is above 95%.

[0047] Preferably, kaolin can increase the viscosity of the crystallized glaze, help control the fluidity of the glaze during the firing process, and prevent the glaze from being too thick or uneven. In the present invention, washed kaolin is added, and the chemical composition of the washed kaolin includes by weight percentage: Al2O3: 35-42%, SiO2: 45-55%, Fe2O3: 0.1-1%, TiO2: 0.01-1%, CaO: 0.01-0.5%, MgO: 0.01-0.5%, K2O: 0.1-1%, Na2O: 0.1-1%. Washed kaolin has good particle size distribution, dispersibility and suspension type on the basis of better improving the chromaticity and transparency of the obtained crystallized glaze layer, can promote the dispersibility of components in the crystallized glaze system, and reduce the sedimentation of component particles, and increase the Na2O content in the system, further promote crystallization, make the crystal large and developed, and better look. The mass percentage of the washed kaolin may specifically be 1%, 2%, 3%, 4%, 5%, or 6%, but is not limited thereto.

[0048] Preferably, the chemical composition of the sodium feldspar includes, by weight percentage: Al2O3: 14-18%, SiO2: 60-70%, TiO2: 0.01-0.2%, CaO: 0.1-0.5%, MgO: 0.1-5%, K2O: 0.5-1%, Na2O: 9.5-12.5%. The addition of sodium feldspar provides sodium oxide to the system, has a good fluxing effect, can reduce the melting temperature and high temperature viscosity of the glaze, and increase the refractive index of the glaze, thereby improving the glossiness of the glaze surface. The weight percentage of the sodium feldspar can be 25%, 30%, 35%, 40%, but is not limited thereto.

[0049] Preferably, glass powder is a good fluxing agent that can effectively reduce the high-temperature viscosity and firing temperature of the glaze. In the present invention, the chemical composition of the glass powder includes by weight percentage: Al2O3: 1-5%, SiO2: 40-45%, B2O3: 15-23%, ZnO: 25-30%. The glass powder contains 15-23% B2O3, which can also reduce the thermal expansion coefficient of the glaze when combined with 10-20% CaO and 0.5-3% MgO in the system. At the same time, the 25-30% ZnO contained can be used as a crystallizing agent together with the zinc oxide added in the system to form new crystal nuclei and promote the growth of crystal flowers, thereby controlling the uniform distribution of crystal flowers, so that the formed crystal glaze layer has a good crystallization effect and a beautiful glaze surface.

[0050] Furthermore, the particle size of the glass powder is 200-290 meshes. The particle size of the glass powder will affect the fluidity and melting characteristics of the crystalline glaze, and further change the distribution of ZnO and B2O3 contained therein, thereby affecting the crystallization behavior and crystal size of the crystalline glaze.

[0051] Preferably, the colorant is generally an inorganic colorant, which may include cobalt blue, cobalt black, gray, yellow-brown, etc., and may be added reasonably according to the decorative effect.

[0052] Furthermore, the crystalline glaze is a colored crystalline glaze containing a colorant, and the weight percentage of the colorant is 1-5%. It should be noted that, generally, the surface glaze and the crystalline glaze do not add colorants at the same time.

[0053] In some specific and preferred embodiments, the glaze amount of the crystallized glaze layer is 100-110 g / dish (measured on a 300*600 mm dish). When the thickness of the crystallized glaze layer is 100-110 g / dish, the crystal nuclei in the crystallized glaze are evenly distributed, and there is a certain space for crystal growth, forming evenly distributed and appropriately sized crystal flowers. If the crystallized glaze layer is too thin, the amount of crystal nuclei will be reduced, and crystal growth will be difficult. If the crystallized glaze layer is too thick, it will not only increase the difficulty of sintering, but also increase the fluidity of the crystallized glaze, affect the glossiness of the crystallized glaze layer, and reduce the yield rate.

[0054] Correspondingly, the second aspect of the present invention also provides a method for preparing the crystalline glaze ceramic decorative product, comprising:

[0055] (1) mixing raw materials for preparing the green body layer, pressing and molding, and drying to obtain the green body layer;

[0056] (2) preparing a top glaze and a crystal glaze, and applying the top glaze and the crystal glaze in sequence on the obtained green body layer;

[0057] (3) The obtained ceramic is sent to a kiln for firing to obtain a crystalline glaze ceramic decorative product, wherein the firing temperature is 1140-1180° C. and the firing period is 40-100 min.

[0058] Furthermore, the firing procedure includes:

[0059] The process is heated from room temperature to 1140-1180°C at a heating rate of 20-50°C / min.

[0060] Keep at 1140-1180℃ for 5-10min;

[0061] The temperature is cooled from 1140-1180°C to room temperature at a rate of 30-75°C / min.

[0062] Furthermore, the crystalline glaze can be coated on the surface glaze, or the crystalline glaze can be processed into a digital effect glaze that can be inkjet printed, and the inkjet printing operation can be performed on the brick blank after the surface glaze is applied, and the crystalline glaze can be printed at a specific position on the brick surface to achieve the effect of fixed-point crystallization.

[0063] The present invention will be further described below with specific embodiments:

[0064] Example 1

[0065] The present embodiment provides a crystalline glaze ceramic decorative product, comprising a body layer, a surface glaze layer and a crystalline glaze layer arranged in sequence; the glaze amount of the surface glaze layer is 89g / dish, and the glaze amount of the crystalline glaze layer is 105g / dish.

[0066] The raw materials for preparing the green body layer include, by weight percentage, 26% potassium-sodium stone powder, 2% Lianjiang black mud, 3% Guangdong black mud, 4% high-alumina sand, 3% talcum powder, 2% Guangxi white mud, 4% Foshan potassium sand, 13% Ningde clay, 26% potassium-sodium feldspar, 4% bentonite, and 13% Foshan washed mud; the chemical composition includes, by weight percentage, 17% Al2O3, 66% SiO2, 0.3% Fe2O3, 0.5% TiO2, 0.6% CaO, 1% MgO, 2.5% K2O, and 3% Na2O.

[0067] The raw material components of the surface glaze layer include surface glaze, and the raw material components of the surface glaze include, by weight percentage, 18% Al2O3, 6% ZrSiO4, 23% water-abrasive, 6% washed ball clay, 14% albite powder, 25% quartz powder, 3% calcined talc, and 5% calcined kaolin; the chemical composition includes, by weight percentage, 27% Al2O3, 54% SiO2, 0.2% Fe2O3, 0.2% TiO2, 1% CaO, 1.5% MgO, 2% K2O, 3% Na2O, and 2% ZrO2.

[0068] The raw material components of the crystalline glaze layer include crystalline glaze, and the raw material components of the crystalline glaze include, by weight percentage, 31% ZnO, 2% burned talc, 25% limestone, 3% washed kaolin, 32% albite, 5% glass powder, and 2% colorant; the chemical composition includes, by weight percentage, 8% Al2O3, 57% SiO2, 0.25% Fe2O3, 0.23% TiO2, 16% CaO, 2.3% MgO, 0.7% K2O, 3.1% Na2O, and 32% ZnO.

[0069] Wherein, the particle size of the zinc oxide is 250 mesh;

[0070] The chemical composition of the calcined talc includes, by weight percentage: Al2O3: 2%, SiO2: 59%, Fe2O3: 0.2%, TiO2: 0.04%, CaO: 0.6%, MgO: 37%, K2O: 0.4%, Na2O: 0.3%;

[0071] The chemical composition of the washed kaolin includes, by weight percentage: Al2O3: 37%, SiO2: 48%, Fe2O3: 0.5%, TiO2: 0.3%, CaO: 0.2%, MgO: 0.2%, K2O: 0.6%, and Na2O: 0.5%.

[0072] The chemical composition of the albite includes, by weight percentage: Al2O3: 16%, SiO2: 65%, TiO2: 0.1%, CaO: 0.2%, MgO: 2.5%, K2O: 0.7%, and Na2O: 10.5%.

[0073] The chemical composition of the glass powder includes, by weight percentage: Al2O3: 3%, SiO2: 43%, B2O3: 20%, ZnO: 27%. The particle size of the glass powder is 250 meshes.

[0074] The colorant is cobalt blue.

[0075] This embodiment also provides a method for preparing a crystalline glaze ceramic decorative product, comprising:

[0076] (1) mixing raw materials for preparing the green body layer, pressing and molding, and drying to obtain the green body layer;

[0077] (2) preparing a top glaze and a crystal glaze, and applying the top glaze and the crystal glaze in sequence on the obtained green body layer;

[0078] (3) sending the obtained ceramic into a kiln for firing to obtain a crystalline glaze ceramic decorative product, wherein the firing procedure comprises:

[0079] The heating rate was 38°C / min from room temperature to 1150°C.

[0080] Keep at 1150℃ for 8min;

[0081] The temperature was cooled from 1150°C to room temperature at a rate of 50°C / min and the sintering cycle was 50min.

[0082] The firing effect diagram of the crystalline glaze ceramic decorative product obtained in Example 1 is as follows Figure 1 As shown, it can be seen that the crystal flowers are large in size, numerous in number, evenly distributed, with little overlap, and a good artistic effect.

[0083] Example 2

[0084] This embodiment provides a crystalline glaze ceramic decorative product, which is basically the same as the embodiment 1, except that:

[0085] The raw material components of the crystalline glaze layer include crystalline glaze, and the raw material components of the crystalline glaze include, by weight percentage, 32.5% ZnO, 1.5% burned talc, 23% limestone, 2.5% washed kaolin, 39% albite, and 1.5% glass powder; the chemical composition includes, by weight percentage, 8% Al2O3, 58.5% SiO2, 0.24% Fe2O3, 0.23% TiO2, 16% CaO, 2.2% MgO, 0.7% K2O, 3.3% Na2O, and 33% ZnO.

[0086] The particle size of the zinc oxide is 200 mesh; the particle size of the glass powder is 200 mesh.

[0087] The firing effect diagram of the crystalline glaze ceramic decorative product obtained in Example 2 is as follows Figure 2 As shown, it can be seen that the crystal flowers are larger in size and the number is slightly reduced, but they are evenly distributed with little overlap, and the artistic effect is good.

[0088] Example 3

[0089] This embodiment provides a crystalline glaze ceramic decorative product, which is basically the same as the embodiment 1, except that:

[0090] The particle size of the zinc oxide is 290 mesh; the particle size of the glass powder is 290 mesh.

[0091] The firing effect diagram of the crystalline glaze ceramic decorative product obtained in Example 3 is as follows Figure 3 As shown, it can be seen that the crystal flowers are large in size, numerous in number, evenly distributed, with little overlap, and a good artistic effect.

[0092] Example 4

[0093] This embodiment provides a crystalline glaze ceramic decorative product, which is basically the same as the embodiment 1, except that:

[0094] The particle size of the zinc oxide is 80 mesh; the particle size of the glass powder is 80 mesh.

[0095] The firing effect diagram of the crystalline glaze ceramic decorative product obtained in Example 4 is as follows Figure 4 As shown, it can be seen that the crystal flowers have become significantly smaller, the number of crystal flowers has decreased, and the artistic effect has become worse.

[0096] Comparative Example 1

[0097] This embodiment provides a crystalline glaze ceramic decorative product, which is basically the same as the embodiment 1, except that:

[0098] The raw material components of the crystalline glaze layer include crystalline glaze, and the raw material components of the crystalline glaze include, by weight percentage, 27% ZnO, 3% burned talc, 35% limestone, 5% washed kaolin, 25% albite, and 5% glass powder; the chemical composition includes, by weight percentage, 8% Al2O3, 57% SiO2, 0.25% Fe2O3, 0.23% TiO2, 16% CaO, 2.3% MgO, 0.7% K2O, 3.1% Na2O, and 32% ZnO.

[0099] The firing effect diagram of the crystalline glaze ceramic decorative product obtained in Comparative Example 1 is as follows Figure 5 As shown, it can be seen that the crystal flowers are extremely small, the number is large but the distribution is uneven, there is little overlap, and the artistic effect is poor.

[0100] Performance Testing

[0101] The crystallized glaze surface effects and the anti-glaze cracking performance of the crystallized glaze layer of the crystalline glaze ceramic decorative products obtained in Examples 1 to 4 and Comparative Example 1 were measured, wherein the anti-glaze cracking performance was tested according to the method in GB / T3810.11-2016.

[0102] The specific test results are shown in Table 1 below.

[0103] Table 1 Test results of samples obtained in the embodiment

[0104] Crystalline glaze appearance Anti-glaze crack performance Example 1 The glaze is smooth and the crystals are evenly distributed No cracks Example 2 The glaze is smooth and the crystals are evenly distributed No cracks Example 3 The glaze is smooth and the crystals are evenly distributed No cracks Example 4 The glaze is rough, the crystals are unevenly distributed and overlapped Micro cracks Comparative Example 1 The glaze is rough, with less crystals and uneven distribution of crystals. Micro cracks

[0105] From the above results, it can be seen that the crystalline glaze obtained by mixing ZnO 25-35%, burnt talc 1-5%, limestone 20-30%, washed kaolin 1-6%, albite 25-40%, glass powder 1-10%, and colorant 0-5% by weight in the present invention has a low firing temperature and a short firing cycle. In addition, the crystal flowers on the obtained crystalline glaze surface layer are evenly distributed, of appropriate size, and have a good decorative effect. In addition, the glaze crack resistance of the glaze surface is improved by adjusting its thermal expansion properties.

[0106] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A crystalline glaze ceramic decorative product, characterized in that: It includes a body layer, a surface glaze layer and a crystallized glaze layer which are arranged in sequence; The raw material components of the crystalline glaze layer include crystalline glaze, and the raw material components of the crystalline glaze include, by weight percentage: ZnO 25-35%, calcined talc 1-5%, limestone 20-30%, washed kaolin 1-6%, albite 25-40%, glass powder 1-10%, and colorant 0-5%; The chemical composition of the crystalline glaze includes, by weight percentage: Al2O3: 5-10%, SiO2: 50-60%, Fe2O3: 0.1-0.3%, TiO2: 0.1-0.3%, CaO: 10-20%, MgO: 0.5-3%, K2O: 0.5-1%, Na2O: 2.4-4%, and ZnO: 25-35%.

2. The crystalline glaze ceramic decorative product according to claim 1, characterized in that: The chemical composition of the glass powder includes, by weight percentage: Al2O3: 1-5%, SiO2: 40-45%, B2O3: 15-23%, and ZnO: 25-30%.

3. The crystalline glaze ceramic decorative product according to claim 1, characterized in that: The chemical composition of the albite includes, by weight percentage: Al2O3: 14-18%, SiO2: 60-70%, TiO2: 0.01-0.2%, CaO: 0.1-0.5%, MgO: 0.1-5%, K2O: 0.5-1%, and Na2O: 9.5-12.5%.

4. The crystalline glaze ceramic decorative product according to claim 2, characterized in that: The particle size of the glass powder is 200-290 mesh; The particle size of the zinc oxide is 200-290 meshes.

5. The crystalline glaze ceramic decorative product according to claim 1, characterized in that: The chemical composition of the washed kaolin includes, by weight percentage: Al2O3: 35-42%, SiO2: 45-55%, Fe2O3: 0.01-1%, TiO2: 0.01-1%, CaO: 0.01-0.5%, MgO: 0.01-0.5%, K2O: 0.1-1%, and Na2O: 0.1-1%.

6. The crystalline glaze ceramic decorative product according to claim 1, characterized in that: The chemical composition of the calcined talc includes, by weight percentage: Al2O3: 1-3%, SiO2: 58-62%, Fe2O3: 0.1-0.3%, TiO2: 0.01-0.1%, CaO: 0.5-1%, MgO: 33-40%, K2O: 0.1-1%, and Na2O: 0.1-0.5%.

7. The crystalline glaze ceramic decorative product according to claim 1, characterized in that: The glaze amount of the surface glaze layer is 88-92 g / dish; The glaze application amount of the crystalline glaze layer is 100-110 g / dish.

8. The crystalline glaze ceramic decorative product according to claim 1, characterized in that: The raw material components of the surface glaze layer include surface glaze, and the raw material components of the surface glaze include, by weight percentage: Al2O3 15-20%, ZrSiO4 4-7%, water-abrasive 22-25%, water-washed ball clay 5-9%, sodium feldspar powder 12-16%, quartz powder 22-28%, burned talc 2-4%, calcined kaolin 4-6%, and colorant 0-5%; The chemical composition of the glaze includes, by weight percentage: Al2O3: 22-28%, SiO2: 50-56%, Fe2O3: 0.1-0.3%, TiO2: 0.1-0.3%, CaO: 0.5-2%, MgO: 0.1-3%, K2O: 1-3%, Na2O: 2-4%, and ZrO2: 1-3%.

9. The crystalline glaze ceramic decorative product according to claim 1, characterized in that: The raw materials for preparing the green body layer include, by weight percentage: 25-30% potassium sodium stone powder, 4-8% black mud, 3-5% high aluminum sand, 2-4% talcum powder, 1-3% Guangxi white mud, 3-5% potassium sand, 12-15% clay, 25-30% potassium sodium feldspar, 3-5% bentonite, and 12-15% washed mud; The chemical composition of the green body layer includes, by weight percentage: Al2O3: 16-18%, SiO2: 64-70%, Fe2O3: 0.1-1%, TiO2: 0.1-1%, CaO: 0.1-1%, MgO: 0.1-3%, K2O: 2-4%, and Na2O: 2-4%.

10. A method for preparing a crystalline glaze ceramic decorative product according to any one of claims 1 to 9, characterized in that: include: (1) mixing raw materials for preparing the green body layer, pressing and molding, and drying to obtain the green body layer; (2) preparing a top glaze and a crystal glaze, and applying the top glaze and the crystal glaze in sequence on the obtained green body layer; (3) The obtained ceramic is sent to a kiln for firing to obtain a crystalline glaze ceramic decorative product, wherein the firing temperature is 1140-1180° C. and the firing period is 40-100 min.

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