Energy-saving and consumption-reducing high-transparency polishing glaze and glazed tile using same

Abstract

The invention discloses an energy-saving and consumption-reducing high-transparency polishing glaze and a glazed tile using the same, the glossiness of the high-transparency polishing glaze is 80-100 degrees, the firing temperature of the high-transparency polishing glaze is less than or equal to 1100 DEG C, and the firing period is less than or equal to 30 minutes; the high-transparency polishing glaze is prepared from the following raw materials: potassium feldspar, calcite, kaolin, wollastonite, calcined talc, quartz, barium carbonate, barium sulfate, zinc oxide and calcium potassium zinc frit. The addition amount of quartz in the high-transparency polishing glaze is less than or equal to 8% according to the mass percent; the high-transparency polishing glaze is prepared from the following chemical components in percentage by mass: 6.7 to 7.7 percent of Al2O3, 14.5 to 15.5 percent of CaO, 9.0 to 11.0 percent of BaO, 7.0 to 11.0 percent of ZnO and less than or equal to 1.6 percent of MgO, and the content of the Al2O3 in the high-transparency polishing glaze is as follows: the content of the CaO is 6.7 to 7.7 percent, the content of the CaO is 14.5 to 15.5 percent, the content of the BaO is 9.0 to 11.0 percent, the content of the ZnO is 7.0 to 11.0 percent, and the content of the MgO is less than or equal to 1.6 percent. According to the energy-saving and consumption-reducing high-transparency polishing glaze and the glazed tile using the same, the firing energy consumption can be reduced on the premise of ensuring the physical and chemical properties of the high-transparency polishing glaze.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building ceramics, in particular to an energy-saving and consumption-reducing high-transparency glaze and glazed tile using the same. BACKGROUND

[0002] In the technical field of building ceramics, reducing the firing energy consumption is an important link in reducing production cost and improving economic benefits; and to reduce the firing energy consumption of the ceramic tile, the fundamental method is to realize low-temperature and rapid firing of the ceramic tile.

[0003] In the preparation process of the existing ceramic effect glaze, although the firing temperature and period have been reduced to a certain extent, since the effect glaze is the surface layer of the glazed tile, the physical and chemical properties such as gloss, wear resistance, acid and alkali resistance, color development performance and stain resistance should be considered, therefore, it is difficult to effectively reduce the firing temperature and shorten the firing period, and the energy-saving and consumption-reducing effect is limited. SUMMARY

[0004] The present application aims to provide an energy-saving and consumption-reducing high-transparency glaze and glazed tile using the same, which can reduce the firing energy consumption while ensuring the physical and chemical properties of the high-transparency glaze, so as to overcome the shortcomings in the prior art.

[0005] To achieve this goal, the present application adopts the following technical solutions: An energy-saving and consumption-reducing high-transparency glaze, wherein the gloss of the high-transparency glaze is 80-100°, the firing temperature of the high-transparency glaze is ≤1100℃, and the firing period is ≤30min. The raw materials of the high-transparency glaze include potassium feldspar, calcite, kaolin, wollastonite, calcined talc, quartz, barium carbonate, barium sulfate, zinc oxide and calcium potassium zinc clinker; and according to the mass percentage, the addition amount of quartz in the high-transparency glaze is ≤8%. The chemical components of the high-transparency glaze include Al2O3, CaO, BaO, ZnO and MgO, and according to the mass percentage, the content of Al2O3 in the high-transparency glaze is 6.7-7.7%, the content of CaO is 14.5-15.5, the content of BaO is 9.0-11.0%, the content of ZnO is 7.0-11.0%, and the content of MgO is ≤1.6%.

[0006] Preferably, the high-transparency glaze has a chemical composition including, in percentage by mass, SiO243.5-45.5%, Al2O36.7-7.7%, Fe2O30.1-0.2%, TiO20.04-0.06%, CaO 14.5-15.5%, MgO 1.2-1.6%, K2O 3.1-4.1%, Na2O 0.4-0.9%, BaO 9.0-11.0%, ZnO 7.0-11.0%, and loss on ignition 7.5-8.5%.

[0007] Preferably, the high-transparency glaze is made of raw materials including, in percentage by mass, potassium feldspar 23%, calcite 9%, kaolin 5%, wollastonite 18.5%, burnt talc 3%, quartz 6%, barium carbonate 6%, barium sulfate 7.5%, zinc oxide 6%, and calcium-potassium-zinc frit 16%.

[0008] Preferably, the calcium-potassium-zinc frit has a chemical composition including, in percentage by mass, SiO259.15%, Al2O36.93%, Fe2O30.13%, TiO20.09%, CaO 12.44%, MgO 0.35%, K2O 6.73%, Na2O 0.26%, BaO 2.55%, ZnO 11.21%, and loss on ignition 0.06%.

[0009] A glazed tile, comprising, from bottom to top, a low-water-absorption wet-mix body, a pattern layer, and a high-transparency glaze layer, wherein the high-transparency glaze layer is fired from the high-transparency glaze described above; Preferably, the low-water-absorption wet-mix body has a water absorption of ≤0.5% and is fired at a temperature of ≤1100℃ for a period of ≤30min. The low-water-absorption wet-mix body is formed by pressing and firing a low-water-absorption wet-mix powder, and the low-water-absorption wet-mix powder is made by a wet-mixing process. The low-water-absorption wet-mix powder has a chemical composition including Al2O3, CaO, MgO, K2O, and Na2O, and, in percentage by mass, the low-water-absorption wet-mix powder has Al2O3 in an amount of 17.2-18.2%, CaO, MgO, K2O, and Na2O in a total amount of 5.6-6.6%, CaO in an amount of ≥0.8%, MgO in an amount of ≥1.8%, K2O in an amount of ≥1.5%, and Na2O in an amount of ≥1.5%.

[0010] Preferably, the low hygroscopic powder has a chemical composition including SiO2 66.4-67.5%, Al2O3 17.2-18.2%, Fe2O3 1.6-2.7%, TiO2 0.3-0.5%, CaO 0.8-1.2%, MgO 1.8-2.3%, K2O 1.5-1.6%, Na2O 1.5-1.8% and loss on ignition 4.8-5.5% by mass.

[0011] A glazed tile, comprising a high water absorption wet powder body, a pattern layer and a high permeability glaze layer arranged in sequence from bottom to top, and the high permeability glaze layer is fired from the high permeability glaze; The high water absorption wet powder body has a water absorption rate >0.5% and ≤3.0% by mass, and a firing temperature ≤1100℃ and a firing period ≤30min. The high water absorption wet powder body is pressed and fired from a high hygroscopic powder, and the high hygroscopic powder is prepared by a wet powder preparation process. The high hygroscopic powder has a chemical composition including Al2O3, CaO, MgO, K2O and Na2O, and the high hygroscopic powder has an Al2O3 content of 16.2-17.2%, a total content of CaO, MgO, K2O and Na2O of 5.3-6.3%, a CaO content ≥0.8%, a MgO content ≥1.6%, a K2O content ≥1.5% and a Na2O content ≥1.4% by mass.

[0012] Preferably, the high hygroscopic powder has a chemical composition including SiO2 68.2-70.5%, Al2O3 16.2-17.2%, Fe2O3 1.4-2.5%, TiO2 0.2-0.4%, CaO 0.8-1.2%, MgO 1.6-2.2%, K2O 1.5-1.7%, Na2O 1.4-1.6% and loss on ignition 3.8-5.5% by mass.

[0013] A glazed tile, comprising a low water absorption dry powder body, a pattern layer and a high permeability glaze layer arranged in sequence from bottom to top, and the high permeability glaze layer is fired from the high permeability glaze; The low water absorption dry powder body has a water absorption rate ≤0.5% by mass, a firing temperature ≤1100℃ and a firing period ≤30min. The low water absorption dry powder body is pressed and fired from a low hygroscopic dry powder, and the low hygroscopic dry powder is prepared by a dry powder preparation process. The chemical composition of the low-dry-method powder includes Al2O3, CaO, MgO, K2O and Na2O, and according to the mass percentage, the content of Al2O3 in the low-dry-method powder is 17.0-18.0%, the total content of CaO, MgO, K2O and Na2O is 5.8-6.8%, the content of CaO is greater than or equal to 0.8%, the content of MgO is greater than or equal to 1.6%, the content of K2O is greater than or equal to 1.5%, the content of Na2O is greater than or equal to 1.9%, and the content of Na2O is greater than the content of MgO.

[0014] Preferably, the chemical composition of the low-dry-method powder includes SiO2 66.1-68.5%, Al2O3 17.0-18.0%, Fe2O3 1.5-2.8%, TiO2 0.3-0.6%, CaO 0.8-1.2%, MgO 1.6-2.2%, K2O 1.5-2.0%, Na2O 1.9-2.3% and loss on ignition 4.0-5.0% according to the mass percentage.

[0015] The technical solution provided by the application can include the following beneficial effects: 1. In the high-transparency glaze throwing raw material scheme, no alumina / calcined alumina is introduced, and the aluminum source is from potassium feldspar, kaolin and calcium-potassium-zinc clinker in the raw material, avoiding the scattering of stray light by free Al2O3, ensuring the color development and transparency; in addition, the selection of potassium feldspar is based on the consideration of the initial melting point and color development of the glaze, preventing the glaze from melting too early to produce pinhole dissolution; the introduction of calcium-potassium-zinc clinker can provide a low-temperature eutectic phase, shorten the melting time and prevent the residual calcium source from causing bubbles in the glaze layer; in addition, wollastonite is selected as the main material instead of carbonate, mainly to ensure a certain silicon content in the entire formula, ensure the corrosion resistance in the later period, and control the generation of bubbles in the glaze layer; in addition, the introduction of calcium-potassium-zinc clinker can also accelerate the dissolution of wollastonite, avoid the scattering of residual crystals and affect the transparency of the glaze layer. Barium carbonate and barium sulfate have a fluxing effect on potassium feldspar, but it is found that barium sulfate has a stronger fluxing effect on potassium feldspar than barium carbonate, which can effectively reduce the generation of pores in the glaze layer. In addition, the calcium-potassium-zinc clinker in the raw material can also reduce the initial melting temperature of barium sulfate to 950℃, reserve sufficient exhaust time for the decomposition of the sulfate, avoid the formation of pinholes due to the residual sulfur, and in the process of releasing SO3 to generate micro-bubbles by BaSO4, the bubbles can play a certain stirring effect on the melt, assisting the exhaust of the melt.

[0016] 2. In the chemical composition of the high-transparency glaze throwing, in order to ensure the purity of the color development, CaO, BaO and ZnO are selected as the main fluxes of the formula, the main reason is that Ba 2+The ion radius is large, and the content thereof can significantly reduce the refractive index gradient of the glass, reduce interface scattering, and improve the transmittance. In addition, the ion radius is large, and the content thereof can significantly reduce the refractive index gradient of the glass, reduce interface scattering, and improve the transmittance. In addition, it can also enhance the color saturation of the ink. ZnO can also effectively promote the homogenization of the melt and inhibit the milky light caused by phase separation, thereby improving the transmittance. In addition, the content of MgO must be strictly controlled to prevent the black pigment in the ink from turning green. DETAILED DESCRIPTION

[0017] The high transmittance glaze provided by the technical solution has a glossiness of 80-100°, a firing temperature of ≤1100°C, and a firing period of ≤30 min. The raw materials of the high transmittance glaze include potassium feldspar, calcite, kaolin, wollastonite, calcined talc, quartz, barium carbonate, barium sulfate, zinc oxide, and calcium potassium zinc clinker; and the addition amount of quartz in the high transmittance glaze is ≤8% by mass percentage. The chemical components of the high transmittance glaze include Al2O3, CaO, BaO, ZnO, and MgO, and the content of Al2O3 is 6.7-7.7%, the content of CaO is 14.5-15.5, the content of BaO is 9.0-11.0%, the content of ZnO is 7.0-11.0%, and the content of MgO is ≤1.6% by mass percentage.

[0018] In order to ensure the realization of the physical and chemical properties of the high transmittance glaze while reducing the firing energy consumption, the technical solution proposes a high transmittance glaze with low temperature and fast firing (the firing temperature is ≤1100°C, and the firing period is ≤30 min), and limits the selection of raw materials and the content of key components. Specifically: The existing high transmittance glaze (such as the black gold flower product) is difficult to simultaneously consider color development and glaze surface pores. The main reason is that the existing high transmittance glaze generally contains quartz which is beneficial to the color development of the glaze layer. However, the excessive addition of quartz will damage the sintering integrity of the glaze, and the unmelted quartz particles will hinder the formation of a continuous and dense glass phase after the glaze is melted, finally forming a large number of pores on the glaze surface and reducing the stain resistance of the glaze layer. In addition, the existing high transmittance glaze generally selects calcined alumina as the aluminum source, but the high-melting-point alumina particles will form a significant refractive index difference with the glass phase, which will prevent the light from penetrating the glaze layer in a straight line, thereby reducing the transmittance of the glaze layer.

[0019] Therefore, in order to solve the above problems, the high transmittance glaze raw material scheme of the present solution does not introduce alumina / calcined alumina, and the aluminum source comes from potassium feldspar, kaolin, and calcium potassium zinc clinker in the raw materials, thereby avoiding the scattering of light by free Al2O3 (Al 3+ [AlO4] is formed in glass- The selection of potassium feldspar is based on the consideration of the initial melting point of the glaze and the color development, to prevent the glaze from melting too early and producing pinhole dissolved caves. The introduction of calcium potassium zinc frit can provide a low-temperature eutectic phase, shorten the melting time, and prevent the residual calcium source from causing bubbles in the glaze layer. Wollastonite is selected as the main material instead of carbonate, mainly to ensure that the entire formula has a certain silicon content, to ensure the corrosion resistance in the later stage, and to control the generation of bubbles in the glaze layer. In addition, the introduction of calcium potassium zinc frit can also accelerate the dissolution of wollastonite (CaSiO3), avoid the scattering of residual crystals, and affect the transparency of the glaze layer. Barium carbonate and barium sulfate have a fluxing effect on potassium feldspar, but it is found that barium sulfate has a stronger fluxing effect on potassium feldspar than barium carbonate, which can effectively reduce the generation of pores in the glaze layer. In addition, the calcium potassium zinc frit in the raw materials can also reduce the initial melting temperature of barium sulfate to 950°C, leaving sufficient time for the decomposition of sulfates and avoiding the formation of pinholes due to the residual sulfur. During the process of releasing SO3 and generating micro-bubbles from BaSO4, the bubbles can play a certain stirring effect on the melt, assisting the exhaust of the melt.

[0020] In the chemical composition of the high-transparency polishing glaze, in order to ensure the purity of the color development, CaO, BaO and ZnO are selected as the main fluxes of this formula. The main reason is that Ba 2+ With a large ionic radius (1.35 Å), controlling its content can significantly reduce the glass refractive index gradient, reduce interface scattering, and improve transparency. In addition, it can also enhance the color saturation of ink. ZnO can also effectively promote the homogenization of the melt and inhibit the milky light caused by phase separation, achieving the effect of improving the transparency. In addition, the content of MgO must be strictly controlled to prevent the black pigment in the ink from turning green.

[0021] It should be noted that the firing temperature mentioned in this scheme is measured by the British Porsches temperature ring, which reflects the equivalent temperature corresponding to the comprehensive thermal effect experienced by the temperature ring at the placement position during the actual firing process.

[0022] Further, the chemical composition of the high-transparency polishing glaze includes SiO243.5-45.5%, Al2O36.7-7.7%, Fe2O30.1-0.2%, TiO20.04-0.06%, CaO 14.5-15.5%, MgO 1.2-1.6%, K2O 3.1-4.1%, Na2O 0.4-0.9%, BaO 9.0-11.0%, ZnO 7.0-11.0%, and loss on ignition 7.5-8.5%, according to mass percentage.

[0023] Further, in order to ensure the stability of the glaze layer during the firing process and meet the performance requirements of this scheme, this scheme proposes a specific example of the chemical composition of the high-transparency polishing glaze.

[0024] Preferably, the high-transparency glaze has a chemical composition including SiO244.6%, Al2O37.23%, Fe2O30.18%, TiO20.05%, CaO 15.12%, MgO 1.58%, K2O 3.69%, Na2O 0.76%, BaO 10.0%, ZnO 7.73%, and a loss on ignition of 8.2%.

[0025] Further, the high-transparency glaze is made of potassium feldspar 23%, calcite 9%, kaolin 5%, wollastonite 18.5%, burnt talc 3%, quartz 6%, barium carbonate 6%, barium sulfate 7.5%, zinc oxide 6%, and calcium-potassium-zinc clinker 16%, in terms of mass percentage.

[0026] In one preferred embodiment of the technical solution, a specific raw material ratio of the high-transparency glaze is provided.

[0027] Further, the calcium-potassium-zinc clinker has a chemical composition including SiO259.15%, Al2O36.93%, Fe2O30.13%, TiO20.09%, CaO 12.44%, MgO 0.35%, K2O 6.73%, Na2O 0.26%, BaO 2.55%, ZnO 11.21%, and a loss on ignition of 0.06%, in terms of mass percentage.

[0028] An enameled tile includes a low-water absorption wet-mix body, a pattern layer, and a high-transparency glaze layer arranged in order from bottom to top, and the high-transparency glaze layer is fired from the high-transparency glaze. The low-water absorption wet-mix body has a water absorption of ≤0.5%, a firing temperature of ≤1100°C, and a firing period of ≤30 min, in terms of mass percentage. The low-water absorption wet-mix body is pressed and fired from a low-water absorption wet-mix powder, and the low-water absorption wet-mix powder is made by a wet-mixing process. The low-water absorption wet-mix powder has a chemical composition including Al2O3, CaO, MgO, K2O, and Na2O, and the low-water absorption wet-mix powder has, in terms of mass percentage, Al2O3 content of 17.2-18.2%, total content of CaO, MgO, K2O, and Na2O of 5.6-6.6%, CaO content of ≥0.8%, MgO content of ≥1.8%, K2O content of ≥1.5%, and Na2O content of ≥1.5%.

[0029] The scheme also proposes a glazed tile using the high-transparency glaze, which is combined with a low-water absorption wet-method powder body, and is conducive to meeting the market demand for high-value high-performance ceramic products (the scheme specifically refers to a body with a water absorption of ≤0.5% and a body made of wet-method powder).

[0030] Specifically, the technical scheme proposes a formula of a low-water absorption wet-method powder body, aiming to meet the market demand for high-value high-performance ceramic products, realize low-temperature fast firing of the body (the scheme specifically refers to a firing temperature of ≤1100℃ and a firing period of ≤30min), and improve the roller rod marks caused by excessive softening during high-temperature firing.

[0031] It should be noted that the water absorption of the body mainly reflects the strength of the ceramic product, and the strength of the ceramic product also determines its market positioning. Generally speaking, the lower the water absorption, the higher the strength of the ceramic product, which is suitable for the mid-to-high-end market. In addition, in the preparation process of the ceramic green body, the powder preparation process of the body powder mainly includes wet-method powdering and dry-method powdering process: the process flow of the wet-method powdering mainly includes first adding water to the prepared body raw materials for wet ball milling to form a slurry, and then spraying the slurry through a spray tower to form a powder. The prepared powder particles have the characteristics of low hardness, large particle size, and low fine powder content. The process flow of the dry-method powdering mainly includes first removing iron and crushing the prepared body raw materials, and then powdering through a vertical dry mill to obtain fine powder with a desired moisture content. After removing iron and slag, the fine powder is added and granulated to obtain powder with a particle size suitable for production. The prepared powder particles have the characteristics of high hardness, small particle size, and high fine powder content. Compared with the dry-method powdering, although the surface of the wet-method powdering body is prone to small pits, the flatness is poor, the orange peel effect is obvious, and the body may have black heart and black spot after firing, the dry-method powdering has obvious advantages of energy saving and low cost, and is mainly suitable for volume market and engineering order products. The wet-method powdering process has higher energy consumption, but the body quality is higher, and is therefore mainly suitable for the mid-to-high-end market.

[0032] Specifically, the scheme first controls the content of Al2O3 in the low-water absorption wet-method powder to be 17.2-18.2%, so as to avoid the softening of the body due to too low content, causing defects such as roller rod marks and even deformation of the brick body, and also to prevent the body formula from requiring a high firing temperature due to too high content, which cannot realize the low-temperature fast firing mechanism required by the scheme.

[0033] Further, in order to adapt to the Al2O3 content in the formula, the flux system of the body formula is designed as CaO-MgO-K2O-Na2O quaternary system, in addition to controlling the total content of the flux components, the content of each flux component is also controlled, and the gradient flux effect brought by the quaternary flux system makes the product not easy to cause liquid phase rapid softening due to single flux in the high temperature firing process, and the problem of excessive softening of the body.

[0034] Further, according to the mass percentage, the chemical composition of the low-hygroscopic powder includes SiO2 66.4-67.5%, Al2O3 17.2-18.2%, Fe2O3 1.6-2.7%, TiO2 0.3-0.5%, CaO 0.8-1.2%, MgO 1.8-2.3%, K2O 1.5-1.6%, Na2O 1.5-1.8%, and loss on ignition 4.8-5.5%.

[0035] Further, in order to ensure the stability of the performance of the body in the whole process of forming, drying and firing, and at the same time meet the performance requirements required by the present scheme, the present scheme proposes an embodiment of the chemical composition of the low-hygroscopic powder. In a specific embodiment, the present scheme also controls the loss on ignition (I.L) of the low-hygroscopic powder to be less than 5.5%, so as to reduce the gaseous products of the body, further ensure the quality of the body, and meet the market demand for high-value and high-performance ceramic products.

[0036] It should be noted that those skilled in the art can configure the chemical composition of the low-hygroscopic powder in the present scheme according to the local raw material resources, and the present scheme does not limit the composition and ratio of the raw material scheme.

[0037] Preferably, according to the mass percentage, the raw materials of the low-hygroscopic powder are composed of bentonite 3%, bauxite 12%, green sand 32%, magnesia soil 2.5%, rotten brick powder 5%, mixed mud 8%, washed mud 4%, edge polishing mud 7%, talc 1.5%, and yellow sand 25%.

[0038] In a preferred embodiment of the present technical scheme, a specific raw material ratio scheme of the low-hygroscopic powder is also proposed.

[0039] In the raw material formula, the main role of bentonite is to improve the plasticity and strength of the body during forming and transportation, and to reduce the occurrence of rotten brick.

[0040] The addition amount of bauxite in the raw material formula is controlled to be 12%, and mixed mud and washed mud are introduced into the raw material formula as a supplement of Al2O3 in the chemical composition. Since the main mineral of mixed mud and washed mud is kaolinite, compared with polyhydrous hard / soft diaspore, kaolinite is easier to sinter, and thus can better match the low-temperature fast firing mechanism of the present scheme.

[0041] Green sand is a kind of sand material, mainly produced in Rongchang and Yongchuan districts of Chongqing, which is a special ceramic raw material in the local area. This kind of raw material has good plasticity after firing and large reserves, and is easy to obtain. If it is added in large quantities in the body formula, it can greatly reduce the cost of raw materials. At the same time, due to the chemical composition of green sand also contains a certain amount of MgO, K2O and Na2O, which makes the green sand have good fluxing effect.

[0042] Magnesite is the main source of MgO in the chemical composition, which has fluxing and whitening effects to some extent. In addition, talc is a supplementary source of MgO in the chemical composition. The combination of the two can increase the stability of the formula.

[0043] Yellow sand is also a cheap and good whiteness raw material in Chongqing, which has good economic benefits. However, due to the extremely low Al2O3 content in the raw material, excessive use will lead to a decrease in the overall Al2O3 content of the formula, resulting in softening of the body.

[0044] Rotten brick powder is a clinker formed by crushing the secondary waste product after firing. When the clinker is added to other raw materials, it can promote the fast firing of the body layer and further reduce the production energy consumption of the body, thereby effectively promoting the rapid firing of the body and shortening the firing cycle. At the same time, it can replace the traditional feldspar material as a fluxing component in the formula, which has obvious fluxing effect and can effectively reduce the cost of raw materials.

[0045] Edge polishing mud is a common waste material in the field of building ceramics, which is mainly produced in the process of edge grinding and polishing of ceramic tiles. Its main minerals are glass phase, quartz and mullite, and it also contains a small amount of silicon carbide and grinding block resin, which is easy to foam. As a solid waste material, the cost of outsourcing treatment is high, so it is usually used in small quantities in the body formula to reduce the cost of the formula. However, during use, it needs to be strictly controlled in the use of low water absorption body (water absorption ≤0.5%). Due to the large amount of liquid phase produced during the high temperature firing process of low water absorption body (used to support the density of the body), these liquid phases will affect the exhaust of the foamable materials such as silicon carbide and resin in the edge polishing mud, thereby affecting the glaze quality of the ceramic tile products using the above body.

[0046] A glazed tile, comprising a high water absorption wet powder body, a pattern layer and a high transmittance glaze layer arranged in order from bottom to top, and the high transmittance glaze layer is fired from the high transmittance glaze; According to the mass percentage, the water absorption of the high water absorption wet powder body is >0.5% and ≤3.0%, the firing temperature is ≤1100℃, and the firing period is ≤30min; The high water absorption wet powder body is pressed and fired from high water absorption wet powder, and the high water absorption wet powder is prepared by wet powder preparation process; The chemical composition of the high hygroscopic powder includes Al2O3, CaO, MgO, K2O and Na2O, and according to the mass percentage, the content of Al2O3 in the high hygroscopic powder is 16.2-17.2%, the total content of CaO, MgO, K2O and Na2O is 5.3-6.3%, the content of CaO is ≥0.8%, the content of MgO is ≥1.6%, the content of K2O is ≥1.5%, and the content of Na2O is ≥1.4%.

[0047] The present solution also provides a glazed tile using the high permeability glaze, which is combined with the high water absorption wet method powder body, and is beneficial to meet the market demand for low-value low-performance ceramic products (the present solution specifically refers to 0.5

[0048] Specifically, the present solution provides a formula of a high water absorption wet method powder body, and aims to meet the market demand for low-value low-performance ceramic products under the premise of realizing low-temperature fast firing of the body (the present solution specifically refers to a firing temperature ≤1100℃ and a firing period ≤30min), and to improve the roller rod marks caused by excessive softening during high-temperature firing.

[0049] It should be noted that the water absorption of the body mainly reflects the strength of the ceramic product, and the strength of the ceramic product also determines its market positioning. Generally, the higher the water absorption, the lower the strength of the ceramic product, which is suitable for the low-end market.

[0050] Specifically, the present solution first controls the content of Al2O3 in the high hygroscopic powder to be 16.2-17.2%, which can meet the requirements of the high water absorption body produced by the present solution in resisting high-temperature softening under the premise of reducing the cost of raw materials in the formula, avoid the softening of the body caused by too low content, cause the defects of roller rod marks and even deformation of the body, and also prevent the high firing temperature of the body formula caused by too high content, which cannot realize the low-temperature fast firing mechanism required by the present solution.

[0051] Further, in order to adapt to the content of Al2O3 in the formula, the present solution also designs the fluxing system of the body formula as a CaO-MgO-K2O-Na2O quaternary system, controls the content of each fluxing component respectively in addition to controlling the total content of the fluxing components, uses the gradient fluxing effect brought by the quaternary fluxing system, so that the product is not easy to cause the problem of excessive softening of the body due to the sharp softening of the liquid phase caused by single fluxing during high-temperature firing. In addition, the total content range of the fluxing components preferred by the present solution can reduce the density of the body formula under the premise of reducing the cost of raw materials in the formula, so as to realize the increase of the water absorption of the body and meet the market demand for low-value low-performance ceramic products.

[0052] Further, the chemical composition of the high hygroscopic powder includes, in percentage by mass, SiO268.2-70.5%, Al2O316.2-17.2%, Fe2O31.4-2.5%, TiO20.2-0.4%, CaO 0.8-1.2%, MgO 1.6-2.2%, K2O 1.5-1.7%, Na2O 1.4-1.6%, and ignition loss 3.8-5.5%.

[0053] Further, to ensure the stability of the performance of the green body in the whole process of forming, drying and firing, and to meet the performance requirements of the present application, a specific embodiment of the chemical composition of the high hygroscopic powder is provided. In a specific embodiment, the ignition loss (I.L) of the high hygroscopic powder is controlled to be less than 5.5% to reduce the gaseous products of the green body and ensure the quality of the green body.

[0054] It should be noted that those skilled in the art can configure the chemical composition of the high hygroscopic powder according to the local raw material resources, and the present application does not limit the composition and ratio of the raw materials.

[0055] Preferably, the raw materials of the high hygroscopic powder consist of 4% bentonite, 6% bauxite, 18% green sand, 1.5% magnesia soil, 15% broken brick powder, 16% mixed mud, 16% edge polishing mud, 1% talc, and 22.5% yellow sand, in percentage by mass.

[0056] In a preferred embodiment of the present application, a specific raw material ratio scheme of the high hygroscopic powder is provided.

[0057] In the raw material formula, the main role of bentonite is to improve the plasticity and strength of the green body during forming and transportation, and to reduce the occurrence of broken brick.

[0058] Bauxite, the most common raw material in the production of ceramic tiles, has the main mineral of diaspore / hard / soft bauxite, and its role is to increase the content of Al2O3 in the formula and its resistance to softening during high temperature firing. Meanwhile, mixed mud is introduced into the raw material formula as a supplement of Al2O3 in the chemical composition. Since the main mineral of mixed mud is kaolinite, which is easier to sinter than diaspore / hard / soft bauxite, the strength during forming and the resistance to high temperature during high temperature firing are ensured.

[0059] Green sand is a kind of sand material, mainly produced in Rongchang and Yongchuan districts of Chongqing, is a special ceramic raw material in the local area, this kind of raw material has good plasticity after firing and large reserves, easy to obtain, if added in large quantities in the body formula, it can greatly reduce the cost of raw materials, at the same time, due to the chemical composition of green sand also contains a certain amount of MgO, K2O and Na2O, so that green sand has good fluxing effect.

[0060] Magnesia soil is the main source of MgO in chemical composition, which has fluxing and whitening effect to some extent; in addition, talc is a supplementary source of MgO in chemical composition, and the combination of the two can increase the stability of the formula.

[0061] Yellow sand is also a cheap and good whiteness raw material in Chongqing, which has good economic benefits, but due to the low Al2O3 content in the raw material, excessive use will lead to the decrease of the overall Al2O3 content of the formula, resulting in the softening of the body.

[0062] Rotten brick powder is a clinker formed by crushing the secondary waste product after firing. When the clinker is added to other raw materials, it can promote the fast firing of the body layer and further reduce the production energy consumption of the body, thereby effectively promoting the rapid firing of the body and shortening the firing period. At the same time, it can replace the traditional feldspar material as the fluxing component in the formula, which has obvious fluxing effect and can effectively reduce the cost of raw materials.

[0063] Edge polishing mud is a common waste material in the field of building ceramics, which is mainly produced in the process of edge grinding and polishing of ceramic tiles. Its main minerals are glass phase, quartz and mullite, and it also contains a small amount of silicon carbide and grinding block resin, which is easy to foam. As a solid waste material, the cost of outsourcing treatment is high, and it is usually used in small quantities in the body formula to reduce the cost of the formula. However, since the purpose of this scheme is to prepare a high water absorption body, the liquid phase produced during high temperature firing is less, so the exhaust of the easy foaming materials such as silicon carbide and resin in the edge polishing mud has less effect. Therefore, a large amount of edge polishing mud can be added in the raw material formula of this scheme to realize efficient disposal of solid waste under the mechanism of low temperature and fast firing, while ensuring the quality and cost benefit of the finished product.

[0064] A glazed tile, comprising a low water absorption dry powder body, a pattern layer and a high transmittance glaze layer arranged in order from bottom to top, and the high transmittance glaze layer is fired from the high transmittance glaze; According to the mass percentage, the water absorption of the low water absorption dry powder body is ≤0.5%, the firing temperature is ≤1100℃, and the firing period is ≤30min; The low water absorption dry powder body is pressed and fired from low water absorption dry powder, and the low water absorption dry powder is prepared by dry powder process; The chemical composition of the low dry-method powder includes Al2O3, CaO, MgO, K2O and Na2O, and according to the mass percentage, the content of Al2O3 in the low dry-method powder is 17.0-18.0%, the total content of CaO, MgO, K2O and Na2O is 5.8-6.8%, the content of CaO is ≥0.8%, the content of MgO is ≥1.6%, the content of K2O is ≥1.5%, the content of Na2O is ≥1.9%, and the content of Na2O is greater than the content of MgO.

[0065] The present application also provides a glazed tile using the high-transparency glaze, which is combined with the low-water-absorption dry-method powder body, and is beneficial to meet the market demand for low-cost ceramic products (the present application particularly refers to a body with a water absorption of ≤0.5% and made of a dry-method powder).

[0066] Specifically, the present application provides a formula of a low-water-absorption dry-method powder body, which aims to meet the market demand for low-cost ceramic products, realize low-temperature fast firing (the present application particularly refers to a firing temperature of ≤1100℃ and a firing period of ≤30 min) of the body, and improve the roller mark caused by excessive softening during high-temperature firing.

[0067] It should be noted that the water absorption of the body mainly reflects the strength of the ceramic product, and the strength of the ceramic product determines its market positioning. Generally, the lower the water absorption, the higher the strength of the ceramic product. In addition, in the preparation process of the ceramic green body, the powder preparation process of the body powder mainly includes wet powder preparation and dry powder preparation process. The process flow of the wet powder preparation mainly includes: first, adding water to the prepared body raw materials to prepare a slurry by wet ball milling, then spraying the slurry through a spray tower to prepare a powder, and the prepared powder particles have the characteristics of low hardness, large particle size and low fine powder content. The process flow of the dry powder preparation mainly includes: first, removing iron and crushing the prepared body raw materials, and then powdering by a vertical dry mill to obtain fine powder with a desired water content, and then adding water to the fine powder to obtain powder with a particle size meeting the production requirements. The prepared powder particles have the characteristics of high hardness, small particle size and high fine powder content. Compared with the wet powder preparation, although the dry powder preparation is prone to small pits on the surface of the body, has poor flatness, obvious orange peel effect, and may have black core and black spots on the body surface after firing, it has obvious advantages of energy saving and low cost, and is mainly suitable for volume market and engineering order products.

[0068] Specifically, the present application controls the content of Al2O3 in the low dry-method powder to be 17.0-18.0% to avoid the softening of the body caused by too low content, which may cause defects such as roller mark and brick body deformation, and also prevents the body formula from requiring a high firing temperature due to too high content, which cannot realize the low-temperature fast firing mechanism required by the present application.

[0069] Further, in order to adapt to the Al2O3 content in the formula, the present solution also designs the fluxing system of the body formula as CaO-MgO-K2O-Na2O quaternary system, in addition to controlling the total content of the fluxing components, the content of each fluxing component is also controlled, and the gradient fluxing effect brought by the quaternary fluxing system makes the product not prone to the problem of excessive softening of the body due to the sharp softening of the liquid phase caused by a single fluxing during high-temperature firing.

[0070] Further, from the enlarged photos observed by microscope, the powder particles prepared by the dry method powdering process are irregular in shape, have more edges and corners, the particle surface is relatively rough, and the particles are solid, so that the bulk density of the particles is relatively large. Therefore, in the press forming process, the pressed brick body has small porosity and large density, and the final brick body has small shrinkage and large size after firing. At the same time, due to the rough surface of the powder particles prepared by the dry method powdering process, the friction between the particles is large during the forming process, and the stress at each position of the brick body is inconsistent, and the shrinkage is inconsistent. The present solution increases the proportion of Na2O in the fluxing component, and uses the large shrinkage characteristic of the high-sodium formula to compensate for the insufficient size of the brick body caused by the small overall shrinkage due to the solid fine particles of the dry method powdering process.

[0071] Further, according to the mass percentage, the chemical composition of the low-absorption dry-method powder includes SiO2 66.1-68.5%, Al2O3 17.0-18.0%, Fe2O3 1.5-2.8%, TiO2 0.3-0.6%, CaO 0.8-1.2%, MgO 1.6-2.2%, K2O 1.5-2.0%, Na2O 1.9-2.3%, and ignition loss 4.0-5.0%.

[0072] Further, in order to ensure the stability of the performance of the body in the whole process of forming, drying and firing, and at the same time meet the performance requirements of the present solution, the present solution proposes an embodiment of the chemical composition of the low-absorption dry-method powder. In a specific embodiment, the present solution also controls the ignition loss (I.L) of the low-absorption dry-method powder to be less than 5% to reduce the gaseous products of the body, further ensure the quality of the body, and meet the market demand for low-cost ceramic products.

[0073] It should be noted that the skilled person in the art can configure the chemical composition of the low-absorption dry-method powder in the present solution according to the local raw material resources, and the present solution does not limit the composition and ratio of the raw material solution.

[0074] Preferably, according to the mass percentage, the raw materials of the low-absorption dry-method powder are composed of 10% bentonite, 14% bauxite, 35% green sand, 1% magnesia soil, 11% broken brick powder, 7% edge polishing mud, 1% talc, and 21% yellow sand.

[0075] In a preferred embodiment of this technical solution, a specific raw material ratio scheme for low-absorption dry powder is also proposed.

[0076] In this raw material formulation, the main role of bentonite is to improve the plasticity and strength of the brick body during molding and transportation, reducing the occurrence of broken bricks. Furthermore, since the dry powdering process does not require the preparation of a slurry, the issue of slurry flowability does not need to be considered. Therefore, a large amount of inexpensive bentonite can be used in the formulation to improve the plasticity and strength of the brick body, eliminating the cost of using water-reducing agents and other chemical materials.

[0077] The addition of bauxite to the raw material formula is controlled at 14%, while high-alumina brick powder is introduced to supplement the Al2O3 content. Since brick powder is clinker formed from crushed waste products after firing, it has no loss on ignition and higher phase activity. Adding this clinker to other raw material compositions promotes rapid firing of the green body, further reducing energy consumption during production and effectively accelerating firing and shortening the firing cycle. Furthermore, replacing traditional feldspar as a fluxing agent in the formula has a significant fluxing effect and effectively reduces raw material costs. It should be noted that dry milling processes have high requirements for the moisture content of raw materials, generally requiring the moisture content of the green body raw materials to be below 15 wt%. Therefore, clay-based raw materials with high Al2O3 content (such as mixed clay and washed clay) typically used for supplementary Al2O3 in wet milling processes cannot be used.

[0078] Green sand is a type of sand material, mainly produced in Rongchang District and Yongchuan District of Chongqing. It is a unique ceramic raw material in the area. This type of raw material has good firing plasticity and large reserves, making it easy to obtain. If it is added in large quantities to the body formula, the cost of raw materials can be greatly reduced. At the same time, because the chemical composition of green sand also contains a certain amount of MgO, K2O and Na2O, it has a good fluxing effect.

[0079] Magnesia clay, as the main source of MgO in chemical composition, has the effects of fluxing and whitening to a certain extent; in addition, talc, as a supplementary source of MgO in chemical composition, can increase the stability of the formula when the two are combined.

[0080] Yellow sand is also a cheap and white raw material in Chongqing, which has good economic benefits. However, because the Al2O3 content in the raw material is extremely low, excessive use will lead to a decrease in the overall Al2O3 content of the formula, resulting in softening of the green body.

[0081] Edge polishing mud is a common waste in the field of building ceramics, which is mainly produced in the process of grinding and polishing of ceramic tiles. The main minerals are glass phase, quartz and mullite, and a small amount of silicon carbide and grinding block resin, which is easy to foam. As a solid waste material, the cost of outsourcing treatment is high, and it is usually used in a small amount in the body formula to reduce the cost of the formula. However, in the process of use, it is necessary to strictly control its use in low water absorption body (water absorption ≤0.5%), because the low water absorption body produces more liquid phase in the high temperature firing process (used to support the density of the body), which will affect the exhaust of the easy foaming materials such as silicon carbide and resin in the edge polishing mud, thereby affecting the glaze quality of the ceramic tile products using the above body.

[0082] The technical solutions of the present application are further illustrated by the specific embodiments.

[0083] Example 1 A. Mix the raw materials of low hygroscopic powder, add water and ball mill to obtain slurry; then, spray the slurry into a spray granulation tower to obtain low hygroscopic powder by spray granulation; Among them, according to the mass percentage, the raw materials of low hygroscopic powder are composed of 3% bentonite, 12% bauxite, 32% green sand, 2.5% magnesia soil, 5% broken brick powder, 8% mixed mud, 4% washed mud, 7% edge polishing mud, 1.5% talc and 25% yellow sand, and the chemical composition of the low hygroscopic powder prepared from the above formula is shown in Table 1.

[0084] B. Mix the raw materials of high permeability glaze, add water and ball mill to obtain high permeability glaze A; Among them, the raw materials of high permeability glaze A are composed of potassium feldspar, calcite, kaolin, wollastonite, calcined talc, quartz, barium carbonate, barium sulfate, zinc oxide and calcium potassium zinc clinker, and according to the mass percentage, the chemical composition of the calcium potassium zinc clinker includes SiO259.15%, Al2O36.93%, Fe2O30.13%, TiO20.09%, CaO 12.44%, MgO 0.35%, K2O 6.73%, Na2O 0.26%, BaO 2.55%, ZnO 11.21% and loss on ignition 0.06%. By reasonably configuring the above raw materials, high permeability glaze A is obtained, and the corresponding chemical composition is shown in Table 2.

[0085] C. The low hygroscopic powder of step A is pressed into a body, dried, and then inkjet printing is performed on the surface of the body to form a pattern layer and apply high permeability glaze A, and then dried again and fired in a kiln to obtain glaze tile A; The firing temperature of the firing is 1100℃ (measured by a British Prolab temperature ring), and the firing period is 29 min; the size of the glazed tile A is 800 specification (800mmx800mm), the body thickness is 10mm, and the inkjet amount is 30g / m 2 The glaze amount of the high-transparency glaze A is 450g / m 2 .

[0086] Example 2 A. The raw materials of the high-hygroscopic powder are mixed, and water is ball milled to obtain a slurry; then, the slurry is sprayed into a spray granulation tower to obtain a high-hygroscopic powder by spray granulation; The raw materials of the high-hygroscopic powder are mixed, and water is ball milled to obtain a slurry; then, the slurry is sprayed into a spray granulation tower to obtain a high-hygroscopic powder by spray granulation;

[0087] B. The raw materials of the high-transparency glaze are mixed, and water is ball milled to obtain a high-transparency glaze B; The raw materials of the high-transparency glaze B are composed of potassium feldspar, calcite, kaolin, wollastonite, burned talc, quartz, barium carbonate, barium sulfate, zinc oxide and calcium potassium zinc clinker, and the chemical composition of the calcium potassium zinc clinker includes SiO259.15%, Al2O36.93%, Fe2O30.13%, TiO20.09%, CaO 12.44%, MgO 0.35%, K2O 6.73%, Na2O 0.26%, BaO 2.55%, ZnO 11.21% and loss on ignition 0.06% according to mass percentage; the high-transparency glaze B is obtained by reasonable configuration of the above-mentioned raw materials, and the corresponding chemical composition is shown in Table 2.

[0088] D. The high-hygroscopic powder of step A is pressed into a body, and after drying, inkjet printing is performed on the surface of the body to form a pattern layer and the high-transparency glaze B is applied, and after drying again, the glazed tile B is obtained by entering the kiln for firing; The firing temperature of the firing is 1100℃ (measured by a British Prolab temperature ring), and the firing period is 29 min; the size of the glazed tile A is 800 specification (800mmx800mm), the body thickness is 10mm, and the inkjet amount is 30g / m 2 The glaze amount of the high-transparency glaze B is 450g / m 2 .

[0089] Example 3 A. The raw materials of the low-hygroscopic powder are mixed according to the formula, and a fine powder is obtained by grinding through a vertical dry mill; then, the fine powder is granulated with water to obtain a low-hygroscopic powder; The raw materials of the low-absorption dry-method powder are composed of 10% bentonite, 14% bauxite, 35% green sand, 1% magnesia soil, 11% broken brick powder, 7% edge polishing mud, 1% talc, and 21% yellow sand, in terms of mass percentage.

[0090] B. The raw materials of the high-transparency glaze are mixed, and water is ball milled to obtain a high-transparency glaze C; The raw materials of the high-transparency glaze C are composed of potassium feldspar, calcite, kaolin, wollastonite, calcined talc, quartz, barium carbonate, barium sulfate, zinc oxide, and calcium potassium zinc clinker, and the chemical composition of the calcium potassium zinc clinker includes SiO2 59.15%, Al2O3 6.93%, Fe2O3 0.13%, TiO2 0.09%, CaO 12.44%, MgO 0.35%, K2O 6.73%, Na2O 0.26%, BaO 2.55%, ZnO 11.21%, and loss on ignition 0.06%, in terms of mass percentage. The high-transparency glaze C is obtained by reasonably configuring the above-mentioned raw materials, and the corresponding chemical composition is shown in Table 2.

[0091] E. The low-absorption dry-method powder of step A is pressed into a green body, and after drying, inkjet printing is performed on the surface of the green body to form a pattern layer, and the high-transparency glaze C is applied, and after drying again, the glaze tile C is obtained by firing in a kiln; The firing temperature of the firing is 1100°C (measured by a British Porselt temperature ring), and the firing period is 29 min. The size of the glaze tile C is 800 specification (800 mm x 800 mm), the thickness of the green body is 10 mm, the inkjet amount is 30 g / m 2 , and the glaze application amount of the high-transparency glaze C is 450 g / m 2 .

[0092] Table 1 Chemical composition of each powder in step A of Examples 1-3

[0093] Table 2 Chemical composition of each high-transparency glaze in step B of Examples 1-3

[0094] It should be noted that the total content of the powder chemical composition listed in Table 1 of Examples 1-3 is less than 100%, and the remaining content is unavoidable impurities in the formula system. The total content of the high-transparency glaze chemical composition listed in Table 2 of Examples 1-3 is less than 100%, and the remaining content is unavoidable impurities in the formula system.

[0095] The glazed tiles prepared in Examples 1-3 were subjected to corresponding performance tests according to the test methods of the People's Republic of China National Standards GB / T 4100-2015 and GB / T 45817-2025. The results are shown in Table 3 below: Table 3 Performance test results of various glazed tiles in Examples 1-3

[0096] As shown in Table 3, this solution can reduce firing energy consumption and achieve low-temperature fast firing while ensuring the physical and chemical properties of high-transparency polished glaze. The performance test results of roller printing meet the standard of GB / T 45817—2025, and the other performance test results meet the standard of GB / T 4100-2015.

[0097] It should be noted that the chemical composition of the raw materials for each green body powder in Examples 1-3 is as follows: The chemical composition of the bauxite, by mass percentage, includes 41.64% SiO2, 40.99% Al2O3, 1.59% Fe2O3, 1.08% TiO2, 0.29% CaO, 0.38% MgO, 0.65% K2O, 0.31% Na2O, and 12.89% loss on ignition.

[0098] The chemical composition of the bentonite, by mass percentage, includes 68.45% SiO2, 14.57% Al2O3, 0.81% Fe2O3, 0.11% TiO2, 1.48% CaO, 1.59% MgO, 2.91% K2O, 1.67% Na2O, and 7.02% loss on ignition.

[0099] According to mass percentage, the chemical composition of the green sand includes 69.51% SiO2, 14.73% Al2O3, 3.19% Fe2O3, 0.31% TiO2, 1.41% CaO, 1.83% MgO, 1.74% K2O, 3.87% Na2O and 2.59% loss on ignition.

[0100] The chemical composition of the magnesian clay, by mass percentage, includes 62.59% SiO2, 5.79% Al2O3, 1.62% Fe2O3, 0.13% TiO2, 0.79% CaO, 21.41% MgO, 0.25% K2O, 0.25% Na2O, and 6.04% loss on ignition.

[0101] The chemical composition of the broken brick powder, by mass percentage, includes 65.67% SiO2, 18.0% Al2O3, 1.75% Fe2O3, 0.5% TiO2, 0.62% CaO, 1.77% MgO, 1.92% K2O, and 2.09% Na2O.

[0102] The chemical composition of the mixed mud, by mass percentage, includes 69.35% SiO2, 20.5% Al2O3, 0.94% Fe2O3, 0.43% TiO2, 0.98% CaO, 0.3% MgO, 1.06% K2O, 0.17% Na2O, and 7.21% loss on ignition.

[0103] The chemical composition of the washed mud, by mass percentage, includes 49.1% SiO2, 33.74% Al2O3, 2.11% Fe2O3, 0.2% TiO2, 0.23% CaO, 0.58% MgO, 2.56% K2O, 0.31% Na2O, and 11.09% loss on ignition.

[0104] The chemical composition of the edge polishing putty, by mass percentage, includes 67.48% SiO2, 18.0% Al2O3, 1.6% Fe2O3, 0.38% TiO2, 2.12% CaO, 2.46% MgO, 2.05% K2O, 2.14% Na2O, and 1.77% loss on ignition.

[0105] The chemical composition of the talc, by mass percentage, includes 32.24% SiO2, 0.69% Al2O3, 0.22% Fe2O3, 0.03% TiO2, 1.76% CaO, 37.57% MgO, 0.01% K2O, 0.09% Na2O, and 27.0% loss on ignition.

[0106] The chemical composition of the yellow sand, by mass percentage, includes 79.63% SiO2, 9.53% Al2O3, 0.65% Fe2O3, 0.22% TiO2, 0.24% CaO, 0.32% MgO, 1.63% K2O, 0.22% Na2O, and 2.8% loss on ignition.

[0107] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A high-transparency polished glaze that saves energy and reduces consumption, characterized in that: The gloss of the high-transparency polished glaze is 80-100°, the firing temperature of the high-transparency polished glaze is ≤1100℃, and the firing cycle is ≤30min; The raw materials for the high-transparency polished glaze consist of potassium feldspar, calcite, kaolin, wollastonite, calcined talc, quartz, barium carbonate, barium sulfate, zinc oxide, and calcium-potassium-zinc frit; and the amount of quartz added in the high-transparency polished glaze is ≤8% by mass percentage. The chemical composition of the high-transparency polished glaze includes Al2O3, CaO, BaO, ZnO and MgO, and by mass percentage, the content of Al2O3 in the high-transparency polished glaze is 6.7-7.7%, the content of CaO is 14.5-15.5%, the content of BaO is 9.0-11.0%, the content of ZnO is 7.0-11.0%, and the content of MgO is ≤1.6%.

2. The energy-saving and consumption-reducing high-transparency polished glaze according to claim 1, characterized in that: According to mass percentage, the chemical composition of the high-transparency polished glaze includes SiO2 43.5-45.5%, Al2O3 6.7-7.7%, Fe2O3 0.1-0.2%, TiO2 0.04-0.06%, CaO 14.5-15.5%, MgO 1.2-1.6%, K2O 3.1-4.1%, Na2O 0.4-0.9%, BaO 9.0-11.0%, ZnO 7.0-11.0%, and loss on ignition 7.5-8.5%.

3. The energy-saving and consumption-reducing high-transparency polished glaze according to claim 2, characterized in that: According to the mass percentage, the raw materials of the high-transparency polished glaze are composed of 23% potassium feldspar, 9% calcite, 5% kaolin, 18.5% wollastonite, 3% calcined talc, 6% quartz, 6% barium carbonate, 7.5% barium sulfate, 6% zinc oxide and 16% calcium-potassium-zinc frit.

4. The energy-saving and consumption-reducing high-transparency polished glaze according to claim 1, characterized in that: The chemical composition of the calcium-potassium-zinc ingot, by mass percentage, includes 59.15% SiO2, 6.93% Al2O3, 0.13% Fe2O3, 0.09% TiO2, 12.44% CaO, 0.35% MgO, 6.73% K2O, 0.26% Na2O, 2.55% BaO, 11.21% ZnO, and 0.06% loss on ignition.

5. A glazed tile, characterized in that: It includes a low water absorption wet-process powder body, a pattern layer and a high transparency polished glaze layer arranged sequentially from bottom to top, and the high transparency polished glaze layer is fired by firing the high transparency polished glaze as described in any one of claims 1 to 4; According to mass percentage, the water absorption rate of the low water absorption wet-process powdered green body is ≤0.5%, the firing temperature is ≤1100℃, and the firing cycle is ≤30min; The low-water-absorption wet-process powder blank is made by pressing and firing low-water-absorption powder, and the low-water-absorption powder is obtained by wet-process powder making. The chemical composition of the low-hygroscopic powder includes Al2O3, CaO, MgO, K2O and Na2O. By mass percentage, the content of Al2O3 in the low-hygroscopic powder is 17.2-18.2%, the total content of CaO, MgO, K2O and Na2O is 5.6-6.6%, the content of CaO is ≥0.8%, the content of MgO is ≥1.8%, the content of K2O is ≥1.5%, and the content of Na2O is ≥1.5%.

6. A glazed tile according to claim 5, characterized in that: The chemical composition of the low-hygroscopic powder, by mass percentage, includes SiO2 66.4–67.5%, Al2O3 17.2–18.2%, Fe2O3 1.6–2.7%, TiO2 0.3–0.5%, CaO 0.8–1.2%, MgO 1.8–2.3%, K2O 1.5–1.6%, Na2O 1.5–1.8%, and loss on ignition 4.8–5.5%.

7. A glazed tile, characterized in that: It includes a high water absorption wet-process powder body, a pattern layer and a high transparency polished glaze layer arranged sequentially from bottom to top, and the high transparency polished glaze layer is fired by firing the high transparency polished glaze as described in any one of claims 1 to 4; According to mass percentage, the water absorption rate of the high water absorption wet-processed powder body is >0.5% and ≤3.0%, the firing temperature is ≤1100℃, and the firing cycle is ≤30min; The high water absorption wet-process powder blank is made by pressing and firing high water absorption powder, and the high water absorption powder is obtained by wet-process powder making process. The chemical composition of the highly hygroscopic powder includes Al2O3, CaO, MgO, K2O and Na2O. By mass percentage, the content of Al2O3 in the highly hygroscopic powder is 16.2-17.2%, the total content of CaO, MgO, K2O and Na2O is 5.3-6.3%, the content of CaO is ≥0.8%, the content of MgO is ≥1.6%, the content of K2O is ≥1.5%, and the content of Na2O is ≥1.4%.

8. A glazed tile according to claim 7, characterized in that: The chemical composition of the highly hygroscopic powder, by mass percentage, includes 68.2–70.5% SiO2, 16.2–17.2% Al2O3, 1.4–2.5% Fe2O3, 0.2–0.4% TiO2, 0.8–1.2% CaO, 1.6–2.2% MgO, 1.5–1.7% K2O, 1.4–1.6% Na2O, and 3.8–5.5% loss on ignition.

9. A glazed tile, characterized in that: It includes a low water absorption dry powder body, a pattern layer and a high transparency polished glaze layer arranged sequentially from bottom to top, wherein the high transparency polished glaze layer is fired from the high transparency polished glaze as described in any one of claims 1 to 4; According to mass percentage, the water absorption rate of the low water absorption dry-process powdered green body is ≤0.5%, the firing temperature is ≤1100℃, and the firing cycle is ≤30min; The low water absorption dry powder blank is made by pressing and firing low water absorption dry powder, and the low water absorption dry powder is obtained by dry powder making process. The chemical composition of the low-absorption dry powder includes Al2O3, CaO, MgO, K2O and Na2O. By mass percentage, the content of Al2O3 in the low-absorption dry powder is 17.0-18.0%, the total content of CaO, MgO, K2O and Na2O is 5.8-6.8%, the content of CaO is ≥0.8%, the content of MgO is ≥1.6%, the content of K2O is ≥1.5%, the content of Na2O is ≥1.9%, and the content of Na2O is greater than the content of MgO.

10. A glazed tile according to claim 9, characterized in that: According to mass percentage, the chemical composition of the low-absorption dry powder includes SiO2 66.1-68.5%, Al2O3 17.0-18.0%, Fe2O3 1.5-2.8%, TiO2 0.3-0.6%, CaO 0.8-1.2%, MgO 1.6-2.2%, K2O 1.5-2.0%, Na2O 1.9-2.3%, and loss on ignition 4.0-5.0%.

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