A kind of plain rock glaze and preparation method thereof and ceramic tile

Abstract

The present invention relates to the technical field of glazes, and discloses a plain rock glaze, a preparation method thereof, and ceramic tiles. The plain rock glaze comprises potassium feldspar, sodium feldspar, quartz, calcined kaolin, kaolin, mica particles, calcined zinc oxide, corundum, calcined talc, and zirconium silicate. By optimizing the raw materials and their proportions, the present invention enables the glaze surface produced using the glaze to have a matte finish. Under soft, non-reflective light, the tile surface exhibits fine, small, evenly distributed, metallic luster glittering points, the glaze surface is dotted with stars, shimmering like a vast galaxy. After polishing, the glaze surface appears smooth and soft, yet has a fine, granular feel, excellent anti-skid, anti-slip effects, and anti-fouling properties, and the glaze surface is wear-resistant, hard, and clear without being hazy, resulting in very high overall performance.

Description

Technical Field

[0001] The present invention relates to the technical field of glazes, in particular to a plain rock glaze, a preparation method thereof and ceramic tiles. Background Art

[0002] With the continuous progress of society and the continuous improvement of people's living standards, people will have different ideas when choosing ceramic products. In real life, people pay more attention to the functionality and practicality of ceramic products. Based on market demand, ceramic production has also developed rapidly, and ceramic production technology has become more and more mature. The blending of glazes in the firing process of ceramics is also extremely important. Ceramic industry players have also paid attention to the development of functional and practical glazes. The same body will produce different effects due to different glazes. The different touch and visual perception of the glaze will affect the choices of consumers.

[0003] In the prior art, due to differences in the selection of raw materials and the preparation process, the matte glaze with glitter has uneven glaze surfaces on most finished tiles, such as the glitter spots are not shiny or the glitter spots are too large, the glaze surface is hazy and not delicate, which limits its application.

[0004] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the Invention

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a plain rock glaze, a preparation method thereof, and ceramic tiles, aiming to solve the problem that the glaze surface of existing ceramic tiles has small and unevenly distributed flash points on the basis of soft light and non-reflective, and the glaze surface is hazy and not delicate.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A plain rock glaze comprises the following components, calculated by weight: 10-20 parts of potassium feldspar, 10-30 parts of sodium feldspar, 10-15 parts of quartz, 10-20 parts of calcined kaolin, 7-15 parts of kaolin, 10-20 parts of mica particles, 3-8 parts of calcined zinc oxide, 8-18 parts of corundum, 1-5 parts of calcined talc, and 5-10 parts of zirconium silicate.

[0008] The described plain rock glaze, wherein, calculated by weight, the described plain rock glaze includes the following components: 10-15 parts of potassium feldspar, 15-25 parts of sodium feldspar, 10-15 parts of quartz, 12-18 parts of calcined kaolin, 7-10 parts of kaolin, 12-18 parts of mica particles, 3-8 parts of calcined zinc oxide, 10-13 parts of corundum, 3-5 parts of calcined talc, and 5-8 parts of zirconium silicate.

[0009] The described plain rock glaze, wherein, calculated by mass percentage, the chemical composition of the described plain rock glaze is: SiO2: 55% to 65%, Al2O3: 18% to 20%, CaO: 1.5% to 2.5%, MgO: 0.2% to 0.6%, K2O: 3.0% to 4.0%, Na2O: 2.5% to 3.5%, ZnO: 1% to 3%, BaO: 0.1% to 0.15%, SrO: 0.03% to 0.1%, ZrO: 3.5% to 4.5%, Fe2O3: ≤0.2%, TiO2: ≤0.1%, and the remainder is loss on ignition.

[0010] The described plain rock glaze, wherein the particle size of the mica particles is 150 to 250 meshes.

[0011] The described plain rock glaze has a firing temperature of 1195-1205° C. and a firing time of 40-45 minutes.

[0012] The described plain rock glaze, wherein, after being fired and formed, the described plain rock glaze is polished, and the glossiness of the glaze surface is 8 to 15°.

[0013] A method for preparing a plain rock glaze comprises the following steps:

[0014] Weighing 10-20 parts of potassium feldspar, 10-30 parts of sodium feldspar, 10-15 parts of quartz, 10-20 parts of calcined kaolin, 7-15 parts of kaolin, 10-20 parts of mica particles, 3-8 parts of calcined zinc oxide, 8-18 parts of corundum, 1-5 parts of calcined talc, and 5-10 parts of zirconium silicate by weight, mixing the above raw materials, and then placing them in a ball mill for wet ball milling to obtain a glaze slip powder;

[0015] The glaze slurry powder and water are mixed in proportion and then ball-milled to obtain the glaze slurry;

[0016] The glaze slurry is sieved, iron-removed and aged to obtain the plain rock glaze.

[0017] The method for preparing the plain rock glaze, wherein the specific gravity of the plain rock glaze is: 1.52-1.56 g / ml, and the flow rate is: 50-60 seconds.

[0018] The method for preparing the plain rock glaze, wherein the weight ratio of the glaze slurry powder and water is 100: (36-40).

[0019] A ceramic tile comprises a green layer, a surface glaze layer, and a plain rock glaze layer which are sequentially arranged from top to bottom. The plain rock glaze layer is formed by pouring, firing, and polishing the plain rock glaze.

[0020] Beneficial effects:

[0021] The present invention provides a plain rock glaze, a preparation method thereof, and ceramic tiles. By optimizing raw materials and proportions, the present invention makes the glaze surface prepared by using the glaze have a matte finish. Under soft, non-reflective light, the tile surface presents fine, small, evenly distributed, metallic luster sparkles. The glaze surface is dotted with stars, shining like a vast galaxy. The polished glaze surface looks smooth and soft, but has a fine granular touch, has excellent anti-skid, anti-slip effects, and anti-fouling properties. In addition, the glaze surface is wear-resistant, has high hardness, is clear and not hazy, and has very high comprehensive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the ceramic tile prepared in Comparative Example 1.

[0023] Figure 2 This is a schematic diagram of the tiles prepared in Comparative Example 2.

[0024] Figure 3 This is a schematic diagram of the tiles produced in Example 1.

[0025] Figure 4 This is a schematic diagram of the tiles prepared in Comparative Example 6.

[0026] Figure 5 This is a schematic diagram of the tiles produced in Example 2. DETAILED DESCRIPTION

[0027] The present invention provides a plain rock glaze, a preparation method thereof, and a ceramic tile. To clarify the objectives, technical solutions, and effects of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0028] See also Figure 1 The present invention provides a plain rock glaze, which includes the following components, calculated by weight: 10 to 20 parts of potassium feldspar, 10 to 30 parts of sodium feldspar, 10 to 15 parts of quartz, 10 to 20 parts of calcined kaolin, 7 to 15 parts of kaolin, 10 to 20 parts of mica particles, 3 to 8 parts of calcined zinc oxide, 8 to 18 parts of corundum, 1 to 5 parts of calcined talc, and 5 to 10 parts of zirconium silicate.

[0029] Specifically, the plain rock glaze includes the following components by weight: 10 to 15 parts of potassium feldspar, 15 to 25 parts of sodium feldspar, 10 to 15 parts of quartz, 12 to 18 parts of calcined kaolin, 7 to 10 parts of kaolin, 12 to 18 parts of mica particles, 3 to 8 parts of calcined zinc oxide, 10 to 13 parts of corundum, 3 to 5 parts of calcined talc, and 5 to 8 parts of zirconium silicate.

[0030] Potassium feldspar and sodium feldspar act as flux and can be used to adjust the fluidity of glaze at high and low temperatures.

[0031] The addition of quartz is beneficial to the formation of glass phase in the glaze, bonding the dispersed crystal phase together, inhibiting the growth of the crystal phase and filling the pores, making the glaze denser, thereby enhancing the anti-fouling performance of the glaze and improving the hardness of the glaze. When the amount of quartz added is small, the glossiness of the glaze is low, and the hardness and anti-fouling performance of the glaze are reduced. When the amount of quartz added is large, the glossiness of the glaze becomes higher, making it difficult to form a matte texture under soft light. Although it can further improve the hardness of the glaze, the glaze is small and has many tiny pinholes, which makes the anti-fouling performance of the glaze worse. Therefore, the above-mentioned amount of quartz added is most appropriate, which is conducive to forming an anti-fouling, ultra-hard glaze.

[0032] After calcination, the organic matter contained in calcined kaolin has been burned away, forming a certain crystal structure. It is more stable, harder and denser than kaolin, but no longer has adhesiveness. It is used to introduce alumina, which is conducive to the formation of mullite crystal phase, increase the firing temperature and sintering strength of the glaze, and also improve the whiteness of the glaze.

[0033] Kaolin is a type of clay, the main component of which is aluminum silicate. It has properties such as adhesion, plasticity, suspension and binding ability, which give the glaze good formability.

[0034] The addition of mica particles is the primary cause of the shimmering spots on the glaze. Mica particles are a layered mineral with a glassy luster and excellent high-temperature resistance. They enhance the brightness, transparency, and glossiness of the glaze, while also promoting the dispersion and stability of other components within the glaze. Too little mica particles will result in a lack of shimmering spots or a small number of shimmering spots. Too much will result in larger and more numerous shimmering spots, making it difficult to form uniform, fine, shimmering crystals. Mica particles added within this range create a more effective shimmering spot on the glaze.

[0035] The addition of calcined zinc oxide is used to improve the texture of the glaze, such as the gloss and smoothness of the glaze, and to expand the firing range.

[0036] Corundum has an extremely high hardness. The addition of corundum powder increases the hardness and wear resistance of glazes, while also whitening, enhancing their brightness and transparency. Too little corundum reduces the hardness of the glaze and makes it more susceptible to scratching. Too much corundum increases the hardness of the glaze, but also creates a hazy, less defined surface and reduces its anti-fouling properties. Furthermore, due to its large particle size, excessive addition can affect the glaze's fluidity, thereby compromising the glaze's quality.

[0037] The addition of burned talc is used to introduce magnesium elements, which can improve the whiteness of the glaze, enhance the fluxing ability, thermal stability and other properties, reduce the glaze's shrinkage rate on burning, and thus reduce the cracking and deformation of the glaze.

[0038] The addition of zirconium silicate is used to introduce zirconium element, which has good chemical stability and can improve the whiteness, hardness and wear resistance of the glaze. It can also improve the whiteness without causing much impact on the gloss of the glaze.

[0039] The above glaze is made by optimizing the raw materials and proportions, so that the glaze surface produced by this glaze is matte. Under the soft non-reflective light, the brick surface presents small, evenly distributed, delicate glittering spots with metallic luster. Please refer to Figure 3 The glaze is dotted with stars, shining like a vast galaxy. The polished glaze surface looks smooth and soft, but has a fine granular touch and has excellent anti-skid, anti-slip and anti-fouling properties (please refer to Figure 5 ), and the glaze is wear-resistant, high hardness, clear and not hazy, and the comprehensive performance is very high.

[0040] In some embodiments, the chemical composition of the plain rock glaze, calculated in percentage by mass, is: SiO2: 55% to 65%, Al2O3: 18% to 20%, CaO: 1.5% to 2.5%, MgO: 0.2% to 0.6%, K2O: 3.0% to 4.0%, Na2O: 2.5% to 3.5%, ZnO: 1% to 3%, BaO: 0.1% to 0.15%, SrO: 0.03% to 0.1%, ZrO: 3.5% to 4.5%, Fe2O3: ≤0.2%, TiO2: ≤0.1%, and the remainder is loss on ignition.

[0041] In some embodiments, the mica particles have a particle size of 150-250 mesh. The size of the mica particles affects the refraction angle, glossiness, and other properties of the glittering spots on the glaze surface. Both excessively large and small particle sizes are detrimental to the formation of evenly distributed, fine, and soft glittering spots. Mica particles that are too large can reduce the fineness of the glaze surface and cause the glittering spots to appear larger.

[0042] The present invention also provides a method for preparing a plain rock glaze, comprising the following steps:

[0043] (1) Weigh 10-20 parts of potassium feldspar, 10-30 parts of sodium feldspar, 10-15 parts of quartz, 10-20 parts of calcined kaolin, 7-15 parts of kaolin, 10-20 parts of mica particles, 3-8 parts of calcined zinc oxide, 8-18 parts of corundum, 1-5 parts of calcined talc, and 5-10 parts of zirconium silicate, mix the above raw materials, and place them in a ball mill for wet ball milling to obtain a glaze slip powder.

[0044] (2) The glaze slurry powder and water are mixed in a weight ratio of 100:(36-40) and then ball-milled for 6-10 hours to obtain a glaze slurry. Water is added to the glaze slurry powder in proportion to fully mix the various components of the glaze to achieve a more uniform state, thereby improving the quality and stability of the glaze slurry. At the same time, the coarse-grained raw materials can be refined into relatively fine particles, increasing the contact area between the particles.

[0045] (3) Pass the glaze slurry through a 325 mesh screen to remove iron particles. When preparing the glaze slurry, the added raw materials may contain some impurities such as iron and titanium. These impurities will affect the color and transparency of the glaze and need to be removed.

[0046] (4) Stir the glaze slurry and adjust the specific gravity of the glaze slurry to 1.52-1.56 g / ml at a flow rate of 50-60 seconds to obtain an intermediate glaze slurry. If the specific gravity of the glaze slurry is too high, the glaze surface will be too thick and difficult to apply, and the appearance and quality of the glaze surface will be affected. If the specific gravity of the glaze slurry is too low, the glaze surface will be too thin and difficult to apply evenly.

[0047] (5) The intermediate glaze slurry is placed in a glaze tank and aged for 24 hours to obtain the above-mentioned plain rock glaze. The glaze after aging is more stable, which is beneficial to improving the transparency, glossiness, and color development properties of the glaze surface.

[0048] The present invention also provides a ceramic tile comprising, from top to bottom, a green layer, a top glaze layer, and a plain rock glaze layer. The plain rock glaze layer is formed by pouring, firing, and polishing the plain rock glaze. Specifically, a digital decorative layer can be added between the top glaze layer and the plain rock glaze layer to enhance the decorative performance of the tile and provide a wider range of tile styles for consumers to choose from. The plain rock glaze can be applied by spraying, bell-shaped pouring, or other methods.

[0049] In some embodiments, the ceramic tile is fired at a temperature of 1195-1205°C for 40-45 minutes. Plain rock glaze is a heat-resistant glaze, capable of withstanding temperatures of 1210-1215°C. The above firing temperature and firing time are selected based on the temperature tolerance of the plain rock glaze. Excessively high firing temperatures can easily cause deformation of the ceramic tile, bubbles in the glaze, and the formation of orange glaze patterns. Furthermore, the mica particles, a heat-resistant raw material, tend to level after melting, resulting in a smooth, glossy glaze surface that is difficult to achieve a matte finish or metallic luster under soft light.

[0050] In some embodiments, the amount of the glaze applied is 570-580 g / m 2 .

[0051] In some embodiments, the glaze gloss of the ceramic tile is 8 to 15°. A soft 8 to 15° dense light reflection design is adopted, and the light transition is soft and non-glaring, taking into account both the lighting effect and visual comfort. The glaze feels delicate and smooth, with a subtle granular feel, which is different from the tiny depressions of dry granular semi-polished tiles. It has good anti-fouling ability, and the tile surface does not slip after being splashed with water, and has good anti-skid and anti-slip effects. In addition, the hardness of the tile surface is higher than that of traditional ceramic tiles, and it is more wear-resistant and not afraid of scratches.

[0052] In order to further illustrate the plain rock glaze, preparation method thereof and ceramic tile provided by the present invention, the following examples are provided for illustration.

[0053] Example 1

[0054] A plain rock glaze comprises the following components, calculated by weight: 10 parts potassium feldspar, 20 parts sodium feldspar, 15 parts quartz, 16 parts calcined kaolin, 8 parts kaolin, 16 parts mica particles, 4 parts calcined zinc oxide, 10 parts corundum, 4 parts calcined talc, and 5 parts zirconium silicate. The mica particles have a particle size of 230-250 mesh.

[0055] A method for preparing a plain rock glaze comprises the following steps:

[0056] (1) Weigh the raw materials according to the above weight parts, mix them in principle, and place them in a ball mill for wet ball milling to obtain glaze slurry powder.

[0057] (2) Glaze slurry powder and water are mixed in a weight ratio of 100:38 and ball-milled for 6 to 10 hours to obtain glaze slurry.

[0058] (3) Pass the glaze slurry through a 325-mesh sieve to remove iron particles.

[0059] (4) The glaze slurry was stirred and the specific gravity of the glaze slurry was adjusted to 1.54 g / ml at a flow rate of 55 seconds to obtain an intermediate glaze slurry.

[0060] (5) The intermediate glaze slurry is placed in a glaze tank and aged for 24 hours to obtain the plain rock glaze.

[0061] A ceramic tile comprises a green layer, a glaze layer, and a plain glaze layer arranged in order from bottom to top, wherein the plain glaze layer is formed by pouring, firing, and polishing the plain glaze. The application amount of the plain glaze is: 570g / m 2 The firing temperature of the ceramic tile is 1200°C and the firing time is 45 minutes.

[0062] Example 2

[0063] A plain rock glaze comprises the following components, calculated by weight: 15 parts potassium feldspar, 15 parts sodium feldspar, 13 parts quartz, 14 parts calcined kaolin, 9 parts kaolin, 14 parts mica particles, 5 parts calcined zinc oxide, 12 parts corundum, 3 parts calcined talc, and 6 parts zirconium silicate. The mica particles have a particle size of 150-160 mesh.

[0064] A method for preparing a plain rock glaze comprises the following steps:

[0065] (1) Weigh the raw materials according to the above weight parts, mix them in principle, and place them in a ball mill for wet ball milling to obtain glaze slurry powder.

[0066] (2) Glaze slurry powder and water are mixed in a weight ratio of 100:40 and ball-milled for 6 to 10 hours to obtain glaze slurry.

[0067] (3) Pass the glaze slurry through a 325-mesh sieve to remove iron particles.

[0068] (4) Stir the glaze slurry and adjust the specific gravity of the glaze slurry to 1.52 g / ml at a flow rate of 50 seconds to obtain an intermediate glaze slurry.

[0069] (5) The intermediate glaze slurry is placed in a glaze tank and aged for 24 hours to obtain the plain rock glaze.

[0070] A ceramic tile comprises a green layer, a glaze layer, and a plain glaze layer arranged in order from bottom to top, wherein the plain glaze layer is formed by pouring, firing, and polishing the plain glaze. The application amount of the plain glaze is: 575g / m 2 The firing temperature of the ceramic tile is 1195°C and the firing time is 45 minutes.

[0071] Example 3

[0072] A plain rock glaze comprises the following components, calculated by weight: 10 parts potassium feldspar, 25 parts sodium feldspar, 10 parts quartz, 13 parts calcined kaolin, 7 parts kaolin, 15 parts mica particles, 3 parts calcined zinc oxide, 12 parts corundum, 5 parts calcined talc, and 7 parts zirconium silicate deficiency. The mica particles have a particle size of 180-200 mesh.

[0073] A method for preparing a plain rock glaze comprises the following steps:

[0074] (1) Weigh the raw materials according to the above weight parts, mix them in principle, and place them in a ball mill for wet ball milling to obtain glaze slurry powder.

[0075] (2) Glaze slurry powder and water are mixed in a weight ratio of 100:36 and ball-milled for 6 to 10 hours to obtain glaze slurry.

[0076] (3) Pass the glaze slurry through a 325-mesh sieve to remove iron particles.

[0077] (4) Stir the glaze slurry and adjust the specific gravity of the glaze slurry to 1.56 g / ml at a flow rate of 60 seconds to obtain an intermediate glaze slurry.

[0078] (5) The intermediate glaze slurry is placed in a glaze tank and aged for 24 hours to obtain the plain rock glaze.

[0079] A ceramic tile comprises a green layer, a glaze layer, and a plain glaze layer arranged in order from bottom to top, wherein the plain glaze layer is formed by pouring, firing, and polishing the plain glaze. The application amount of the plain glaze is: 580g / m 2 The firing temperature of the ceramic tile is 1205°C and the firing time is 40 minutes.

[0080] Comparative Example 1

[0081] The raw material composition of the plain rock glaze in Comparative Example 1 is substantially the same as that of the plain rock glaze in Example 1, except that the amount of mica particles added in Comparative Example 1 is 7 parts.

[0082] Comparative Example 2

[0083] The raw material composition of the plain rock glaze in Comparative Example 2 is substantially the same as that of the plain rock glaze in Example 1, except that the amount of mica particles added in Comparative Example 2 is 25 parts.

[0084] Comparative Example 3

[0085] The raw material composition of the plain rock glaze in Comparative Example 3 is substantially the same as that of the plain rock glaze in Example 1, except that the amount of corundum added in Comparative Example 3 is 6 parts.

[0086] Comparative Example 4

[0087] The raw material composition of the plain rock glaze in Comparative Example 4 is substantially the same as that of the plain rock glaze in Example 1, except that the amount of corundum added in Comparative Example 4 is 22 parts.

[0088] Comparative Example 5

[0089] The raw material composition of the plain rock glaze in Comparative Example 5 is substantially the same as that of the plain rock glaze in Example 1, except that the amount of quartz added in Comparative Example 5 is 5 parts.

[0090] Comparative Example 6

[0091] The raw material composition of the plain rock glaze in Comparative Example 6 is substantially the same as that of the plain rock glaze in Example 1, except that the amount of quartz added in Comparative Example 6 is 20 parts.

[0092] The performance test items of Examples 1-3 and Comparative Examples 1-6 are as follows:

[0093] Delicateness: Touch the glaze with your hand to see if it feels round and silky.

[0094] Shining point: Shine light on the glaze surface and you will see that it is dotted with stars, shining like a vast galaxy.

[0095] Antifouling performance: According to GB / T 3810.14-2006 "Test methods for ceramic tiles" Part 14: Determination of stain resistance, the specific operation is: leave blue ink, black ink, red ink, blue marker pen, black marker pen, and red marker pen on the tile surface for 60 minutes respectively, then gently wipe it with water and a rag, and measure the antifouling performance of each sample.

[0096] Anti-slip performance: Each sample was tested according to the DIN51130 Anti-slip Test for Floors.

[0097] The following table shows the anti-slip classification of the DIN51130 floor anti-slip test:

[0098] R-value Classification Tilt angle / ° R9 Low 6-10 R10 normal 10-19 R11 Above average 19-27 R12 high 27-35 R13 Very high ＞35

[0099] Wear resistance: According to GB / T 3810.7-2016 "Test methods for ceramic tiles - Determination of wear resistance", each sample was tested and the wear effects after 750, 1500 and 2100 revolutions were compared.

[0100] Mohs hardness requirement: ≥5.

[0101] The test results are shown in the following table:

[0102]

[0103]

[0104]

[0105] See also Figure 1 In comparative example 1, the amount of mica particles added is lower than the range value, and the number of sparkling points on the corresponding glaze is small, which cannot present a shiny metallic effect.

[0106] See also Figure 2 In comparative example 2, the amount of mica particles added is higher than the range value, and the corresponding glaze has larger and more flash points, and is in an uneven state.

[0107] In comparative example 3, the amount of corundum added is lower than the range value, and the corresponding glaze hardness is only 3.8, which is worse and more easily scratched.

[0108] In comparative example 4, the amount of corundum added is higher than the range value, and the Mohs hardness of the corresponding glaze reaches 5.3, which has high hardness. However, the glaze is not clear and is hazy, and the anti-fouling performance is also deteriorated.

[0109] In Comparative Example 5, the amount of quartz added is lower than the range value, the glossiness of the corresponding glaze becomes lower, the Mohs hardness of the glaze is 4.2, and the hardness and wear resistance level become worse.

[0110] See also Figure 4 In comparative example 6, the amount of quartz added is higher than the range value, the glossiness of the glaze becomes higher, and the glaze mode hardness reaches 5.1, but there are more pinholes on the glaze, which causes its anti-fouling grade to decrease.

[0111] In summary, the present invention optimizes the raw materials and proportions to make the glaze surface made by this glaze have a matte finish. Under soft, non-reflective light, the brick surface presents small, evenly distributed, and delicate glittering spots with a metallic luster. Figure 3 The glaze is dotted with stars, shining like a vast galaxy. The polished glaze surface looks smooth and soft, but has a fine granular touch and has excellent anti-skid, anti-slip and anti-fouling properties (please refer to Figure 5 ), and the glaze is wear-resistant, high hardness, clear and not hazy, and the comprehensive performance is very high.

[0112] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the scope of protection of the present invention.

Claims

1. A plain rock glaze, characterized in that: The glaze comprises the following components in parts by weight: 10-15 parts of potassium feldspar, 15-25 parts of sodium feldspar, 10-15 parts of quartz, 12-18 parts of calcined kaolin, 7-10 parts of kaolin, 12-18 parts of mica particles, 3-8 parts of calcined zinc oxide, 10-13 parts of corundum, 3-5 parts of calcined talc, and 5-8 parts of zirconium silicate; the chemical composition of the plain rock glaze is: SiO2: 55%-65%, Al2O3: 18%-20%, CaO: 1.5%-2.5%, MgO: 0.2%-0.6%, K2O: 3.0%-4.0% .0%, Na2O: 2.5%~3.5%, ZnO: 1%~3%, BaO: 0.1%~0.15%, SrO: 0.03%~0.1%, ZrO: 3.5%~4.5%, Fe2O3: ≤0.2%, TiO2: ≤0.1%, and the remainder is loss on ignition; the particle size of the mica particles is 150~250 mesh; the firing temperature of the plain rock glaze is: 1195~1205℃, and the firing time is: 40~45min; the plain rock glaze is polished after firing and molding, and the glossiness of the glaze surface is 8~15°.

2. A method for preparing the plain rock glaze according to claim 1, characterized in that: The steps include: Weighing 10-15 parts of potassium feldspar, 15-25 parts of sodium feldspar, 10-15 parts of quartz, 12-18 parts of calcined kaolin, 7-10 parts of kaolin, 12-18 parts of mica particles, 3-8 parts of calcined zinc oxide, 10-13 parts of corundum, 3-5 parts of calcined talc, and 5-8 parts of zirconium silicate as raw materials by weight, mixing the raw materials and then placing them in a ball mill for wet ball milling to obtain a glaze slip powder; The glaze slurry powder and water are mixed in proportion and then ball-milled to obtain the glaze slurry; The glaze slurry is screened, iron removed, and aged to obtain the plain rock glaze as claimed in claim 1.

3. The method for preparing the plain rock glaze according to claim 2, wherein: The specific gravity of the plain rock glaze is 1.52-1.56 g / ml, and the flow rate is 50-60 seconds.

4. The method for preparing the plain rock glaze according to claim 2, wherein: The weight ratio of the glaze slurry powder to water is 100:(36-40).

5. A ceramic tile, characterized in that: The invention comprises a green body layer, a surface glaze layer and a plain rock glaze layer which are sequentially arranged from top to bottom. The plain rock glaze layer is formed by pouring, firing and polishing the plain rock glaze according to claim 1.

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