Chemical-corrosion-resistant full-polished glaze as well as preparation method and application thereof

Abstract

The invention relates to chemical-corrosion-resistant full-polished glaze as well as a preparation method and application thereof, and belongs to the technical field of ceramic production and manufacturing. The chemical-corrosion-resistant fully-polished glaze comprises the following mineral components in percentage by mass: 5%-10% of quartz, 5%-10% of kaolin, 1%-10% of calcined talc, 20%-25% of wollastonite, 10%-20% of calcined kaolin, 1%-5% of calcined alumina, 1%-5% of calcined zinc oxide, 1%-5% of barium carbonate, 1%-3% of titanium oxide, 1%-5% of zirconium silicate and 10%-20% of boron frit. By specially designing a full-polishing glaze formula of the ceramic tile, adjusting the firing temperature and discharging or reducing defects such as air holes in a glaze layer as much as possible, the glaze layer forms a stable inert surface, and chemical substances cannot react with the glaze layer or only slightly react with the glaze layer, so that the transparency, integrity and glossiness of the surface are kept.

Description

Technical Field

[0001] This invention relates to a chemically resistant fully polished glaze, its preparation method, and its application, belonging to the field of ceramic production and manufacturing technology. Background Technology

[0002] Ordinary fully polished glazed ceramic tiles may suffer corrosion of the glaze layer after prolonged contact with acids, alkalis, and other chemicals, becoming dull, porous, and prone to staining. Chemically resistant fully polished glazed ceramic tiles are a special type of functional building material. Their main advantage lies in their resistance to the erosion of pollutants such as acids, alkalis, solvents, and chemicals. These properties make them irreplaceable in ordinary households and especially in industrial, commercial, and laboratory environments. Summary of the Invention

[0003] By specially designing the formula for fully polished glazed ceramic tiles and adjusting the firing temperature, defects such as pores in the glaze layer are minimized or eliminated, resulting in a stable, inert surface that is immune to chemical reactions, thus maintaining the surface's transparency, integrity, and gloss. To address the above problems, this invention provides a chemically resistant fully polished glaze and ceramics prepared using it. The technical objective of this invention is achieved through the following technical solution:

[0004] In a first aspect, the present invention provides a chemically resistant fully polished glaze. The mineral composition of the chemically resistant fully polished glaze comprises, by mass percentage: 5%–10% quartz, 5%–10% kaolin, 1%–10% calcined talc, 20%–25% wollastonite, 10%–20% calcined kaolin, 1%–5% calcined alumina, 1%–5% calcined zinc oxide, 1%–5% barium carbonate, 1%–3% titanium oxide, 1%–5% zirconium silicate, and 10%–20% boron frit.

[0005] Preferably, the mineral composition of the boron frit includes, by mass percentage: 10%–20% quartz, 5%–10% kaolin, 25%–30% potassium feldspar, 5%–10% calcium carbonate, 5%–10% magnesium carbonate, 5%–10% barium carbonate, 10%–20% borax, and 5%–10% calcined zinc oxide.

[0006] Preferably, the raw materials are weighed according to the mineral composition of the boron frit, mixed evenly, and then melted at 1400-1500℃ for 2-3 hours to obtain a glass melt; the glass melt is then quenched with water and crushed to obtain a boron frit.

[0007] Preferably, the chemical composition of the boron ingot includes, by mass percentage: SiO2: 50%–55%; Al2O3: 5%–10%; CaO: 5%–10%; MgO: 1%–5%; K2O: 1%–5%; Na2O: 1%–5%; ZnO: 5%–10%; BaO: 5%–10%; B2O3: 5%–10%.

[0008] Preferably, the chemical composition of the chemically resistant fully polished glaze includes, by mass percentage: loss on ignition: 2%–5%; SiO2: 50%–55%; Al2O3: 10%–15%; Fe2O3: 0.01%–0.2%; TiO2: 0.1%–3%; CaO: 8%–12%; MgO: 1%–5%; K2O: 1%–3%; Na2O: 1%–2%; ZnO: 1%–5%; BaO: 1%–5%; B2O3: 1%–3%; ZrO2: 1%–3%.

[0009] Secondly, the present invention provides a method for preparing chemically resistant ceramics. The preparation method includes: Apply a surface glaze to the body; Ink patterns are printed on the surface of the blank after glazing. Apply the chemically resistant, fully polished glaze to the surface of the blank after inkjet printing the ink pattern; Chemically resistant ceramics are obtained by firing and polishing the green body after applying a chemically resistant glaze.

[0010] Preferably, the chemical corrosion resistant polished glaze is applied by spraying; more preferably, the specific gravity of the chemical corrosion resistant glaze is 1.45–1.50 g / cm³. 3 The glaze application rate is 450-500 g / m². 2 .

[0011] Preferably, the firing temperature is 1180–1220℃ and the firing cycle is 40–50 minutes.

[0012] Preferably, the chemical composition of the glaze includes, by mass percentage: SiO2: 55%–70%; Al2O3: 15%–20%; Fe2O3: 0.1%–0.3%; TiO2: 0.1%–0.2%; CaO: 0.1%–0.5%; MgO: 0.5%–2%; K2O: 2%–5%; Na2O: 2%–5%; ZrO2: 5%–8%; loss on ignition: 1%–3%. More preferably, the mineral composition of the glaze includes, by mass percentage: potassium feldspar 28%–35%, sodium feldspar 15%–21%, kaolin 12%–18%, quartz sand 12%–18%, zirconium silicate 8%–12%, alumina 2%–5%, calcined talc 2%–4%, and calcined kaolin 3%–8%.

[0013] Preferably, the glaze is applied by spraying or pouring; more preferably, the specific gravity of the glaze is 1.40–1.50 g / cm³. 3 The glaze application amount is 450-650 g / m². 2 . Attached Figure Description

[0014] Figure 1 This is a rendering of the surface of the chemically resistant ceramic tile from Example 1; Figure 2 This is a comparison image of the ceramic tile surface effect; Figure 3 This is a comparison image of the ceramic tile surface effect; Figure 4 The images show the surface effect (left) and cross-section effect (right) of the ceramic tile in Comparative Example 3. Figure 5 These are images showing the surface effects of ceramic tiles from Comparative Example 4 (left) and Example 1 (right); Figure 6 These are images showing the surface effects of ceramic tiles from Comparative Example 5 (left) and Example 1 (right); Figure 7 This is a comparison of the ceramic tile before and after corrosion in Example 6 (left is after corrosion, right is before corrosion); Figure 8 This is a comparison of the ceramic tile before and after corrosion in Example 7 (left is after corrosion, right is before corrosion). Detailed Implementation

[0015] The present invention is further illustrated by the following embodiments. It should be understood that the following embodiments are for illustrative purposes only and are not intended to limit the present invention. The following exemplary descriptions illustrate chemically resistant full-polished glaze, its preparation method, and its applications.

[0016] In ordinary polished glaze formulations, a large amount of potassium feldspar and sodium feldspar raw materials are usually introduced as fluxes to reduce the high-temperature viscosity of the formulation. However, as a glass network modifier, alkali metal ions can break the silicon-oxygen network while lowering the melting temperature of the formulation, forming non-bridging oxygen. This results in a large number of breaks in the silicon-oxygen-silicon network, reducing the chemical stability of the glaze. The higher the content, the easier it is for the glaze to be corroded.

[0017] The mineral composition of the chemically resistant fully polished glaze includes, by mass percentage: 5%–10% quartz, 5%–10% kaolin, 1%–10% calcined talc, 20%–25% wollastonite, 10%–20% calcined kaolin, 1%–5% calcined alumina, 1%–5% calcined zinc oxide, 1%–5% barium carbonate, 1%–3% titanium oxide, 1%–5% zirconium silicate, and 10%–20% boron frit.

[0018] Introducing coloring metal oxides such as nickel oxide, chromium oxide, tantalum oxide, and cobalt oxide into the fully polished glaze formula will cause the glaze to appear brownish-black or black and opaque, obscuring the color of the inkjet pattern. The fully polished glaze formula of this invention does not introduce coloring oxides, and the glaze exhibits high transparency after firing, which can perfectly present the color of the inkjet pattern.

[0019] Corrosion-resistant glazes are applied to ceramic tile bodies to mask the body color and improve inkjet printing. Existing technologies introduce large amounts of titanium dioxide into corrosion-resistant glazes. Titanium dioxide is a commonly used opacifier; its excessive introduction results in a dark yellow glaze, which is highly opaque and a pale yellow color. This invention provides a transparent, fully polished glaze, applied to the surface of ceramic tiles to protect the inkjet pattern.

[0020] The chemically resistant, fully polished glaze formulation of this invention does not introduce additional alkali metal raw materials (such as potassium feldspar, sodium feldspar, lithium carbonate, sodium carbonate, etc., alkali metal fluxes). Instead, it introduces boron-containing frit and alkaline earth metal raw materials such as wollastonite, calcined talc, and barium carbonate as fluxes, which, together with calcined zinc oxide, reduce the high-temperature viscosity of the formulation. Titanium oxide and zirconium silicate are introduced to strengthen the network structure of the glassy phase in the glaze layer, thus achieving a corrosion-resistant, low-alkali system formulation. Compared to monovalent cations, the Ca provided by wollastonite, calcined talc, and barium carbonate... 2+ Mg 2+ Ba 2+ The higher electric field strength allows for a stronger bond with oxygen in the glass network, further reinforcing the network and improving the chemical stability of the glaze. This invention introduces boron frit, which, after ball milling, forms boron glass, making it more stable and insoluble in the glaze slurry. It only decomposes during high-temperature firing, providing B... 3+ At the same time, as a network intermediate, it strengthens the original silicon-oxygen network, making it more compact and thus resisting corrosion and erosion.

[0021] Calcined alumina and kaolin are introduced, with calcined kaolin providing Al2O3 as a neutral oxide. Al2O3 acts as a glass network forger and intermediate, forming [AlO4] tetrahedra with oxygen ions in the glass network, making the network denser and more complete, thus providing corrosion resistance. Titanium oxide and zirconium silicate are both extremely stable compounds; their introduction into the silicate formulation provides Ti. 4+ Zr 4+ It is a high-valence, small-radius ion with extremely high field strength. In a glass network, it can firmly attract and bind surrounding oxygen ions, acting as a cohesive and contracting agent for the entire glass network. This makes the glass network structure denser and reduces porosity. Lowering porosity further hinders the corrosive medium (H+). + OH - The migration of ) further improves the corrosion resistance of the glaze.

[0022] In an optional embodiment, the chemical composition of the boron ingot includes, by mass percentage: SiO2: 50%–55%; Al2O3: 5%–10%; CaO: 5%–10%; MgO: 1%–5%; K2O: 1%–5%; Na2O: 1%–5%; ZnO: 5%–10%; BaO: 5%–10%; B2O3: 5%–10%.

[0023] In an optional embodiment, the mineral composition of the boron frit includes, by mass percentage: 10%–20% quartz, 5%–10% kaolin, 25%–30% potassium feldspar, 5%–10% calcium carbonate, 5%–10% magnesium carbonate, 5%–10% barium carbonate, 10%–20% borax, and 5%–10% calcined zinc oxide. For example, the raw materials are weighed according to the mineral composition of the boron frit, mixed evenly, and then melted at 1400–1500°C for 2–3 hours to obtain a glass melt; the glass melt is then quenched with water and crushed to obtain the boron frit.

[0024] In an optional embodiment, the chemical composition of the chemically resistant fully polished glaze includes, by mass percentage: loss on ignition: 2%–5%; SiO2: 50%–55%; Al2O3: 10%–15%; Fe2O3: 0–0.2%; TiO2: 0–3%; CaO: 8%–12%; MgO: 1%–5%; K2O: 1%–3%; Na2O: 1%–2%; ZnO: 1%–5%; BaO: 1%–5%; B2O3: 1%–3%; ZrO2: 1%–3%. In an optional embodiment, the chemical composition of the chemically resistant fully polished glaze includes, by mass percentage: loss on ignition: 2%–5%; SiO2: 50%–55%; Al2O3: 10%–15%; Fe2O3: 0.01%–0.2%; TiO2: 0.1%–3%; CaO: 8%–12%; MgO: 1%–5%; K2O: 1%–3%; Na2O: 1%–2%; ZnO: 1%–5%; BaO: 1%–5%; B2O3: 1%–3%; ZrO2: 1%–3%.

[0025] The present invention also describes a method for preparing ceramics using the aforementioned chemically resistant fully polished glaze.

[0026] Prepare the green body. Press the green body powder into shape to obtain the green body. The chemical composition of the green body powder is not limited. Any green body powder commonly used in the art can be used. As an example, the chemical composition of the green body powder may include, by mass percentage: SiO2: 63%–68%; Al2O3: 17%–21%; Fe2O3: 0.2%–0.8%; TiO2: 0.1%–0.6%; CaO: 0.5%–1%; MgO: 0.5%–1.5%; K2O: 2%–3%; Na2O: 2%–3%; Loss on ignition: 4%–6%. The forming method includes, but is not limited to, dry pressing. A press can be used for forming.

[0027] Dry the billet. Drying can be done in a drying kiln, either electrically or in a hot air drying oven. The drying temperature can be 120–180℃. The drying time can be 40–60 minutes. The moisture content of the dried billet can be 0.3%–0.5% by mass.

[0028] A surface glaze is applied to the dried body surface. Conventional surface glazes in the art can be used. In an optional embodiment, the chemical composition of the surface glaze includes, by mass percentage: SiO2: 55%–70%; Al2O3: 15%–20%; Fe2O3: 0.1%–0.3%; TiO2: 0.1%–0.2%; CaO: 0.1%–0.5%; MgO: 0.5%–2%; K2O: 2%–5%; Na2O: 2%–5%; ZrO2: 5%–8%; loss on ignition: 1%–3%. For example, the chemical composition of the glaze includes, by mass percentage: SiO2: 65.63%, Al2O3: 18.00%, Fe2O3: 0.15%, TiO2: 0.14%, CaO: 0.27%, MgO: 1.09%, K2O: 3.51%, Na2O: 3.04%, ZrO2: 6.37%, and loss on ignition: 1.80%.

[0029] As an example, the mineral composition of the glaze includes, by mass percentage: 28%–35% potassium feldspar, 15%–21% sodium feldspar, 12%–18% kaolin, 12%–18% quartz sand, 8%–12% zirconium silicate, 2%–5% alumina, 2%–4% calcined talc, and 3%–8% calcined kaolin.

[0030] Weigh each raw material according to the mineral composition of the glaze, add sodium tripolyphosphate, sodium carboxymethyl cellulose, and water, ball mill until homogeneous, and sieve to remove iron to obtain the glaze slurry. The mass residue of the glaze slurry passing through a 325-mesh sieve is ≤0.8%. In an optional embodiment, the composition of the glaze slurry includes the glaze mineral composition, sodium tripolyphosphate, sodium carboxymethyl cellulose, and water. The mass ratio of the glaze mineral composition to water can be (60%–80%):(20%–40%). The mass proportion of sodium tripolyphosphate in the glaze mineral composition can be 0.1%–0.4%. The mass proportion of sodium carboxymethyl cellulose in the glaze mineral composition can be 0.1%–0.4%. Water can be added to the glaze slurry to obtain the desired glaze specific gravity.

[0031] The glaze can be applied by spraying or pouring. In an optional embodiment, the specific gravity of the glaze is 1.40–1.50 g / cm³. 3 The glaze application amount is 450-650 g / m². 2 .

[0032] Ink patterns are printed onto the surface of the glazed body using inkjet printing. The texture and color of the ink patterns can be adapted to meet specific requirements.

[0033] Apply a chemically resistant, fully polished glaze to the surface of the blank after inkjet printing the ink pattern.

[0034] Weigh the mineral components of the chemically resistant fully polished glaze according to the formula, add additives and water, ball mill until homogeneous, and sieve to obtain the glaze slurry. The additives include, but are not limited to, sodium carboxymethyl cellulose and sodium tripolyphosphate. The mass ratio of sodium tripolyphosphate to the mineral components of the chemically resistant fully polished glaze can be 0.1% to 0.4%. The mass ratio of sodium carboxymethyl cellulose to the mineral components of the chemically resistant fully polished glaze can be 0.1% to 0.4%. The mass residue of the glaze slurry passing through a 325-mesh sieve can be 0.5% to 0.8%. Water can be added to the glaze slurry during use to obtain the desired final specific gravity of the fully polished glaze.

[0035] A swing-arm type glazing machine can be used to apply a chemically resistant, fully polished glaze. In an optional embodiment, the specific gravity of the chemically resistant, fully polished glaze is 1.45–1.50 g / cm³. 3 The glaze application rate is 450-500 g / m². 2 When the glaze application is too low, the glaze layer is too thin and cannot fully flow and cover the surface of the brick body during high-temperature firing, easily forming defects such as pinholes, uneven glaze surface, and orange peel. When the glaze application is too high, the glaze layer is too thick, which is not conducive to the expulsion of gas from the body and glaze, resulting in a large number of air bubbles remaining in the glaze layer. After polishing, these bubbles are exposed, affecting the anti-fouling and acid and alkali resistance of the glaze surface.

[0036] The green body, after being glazed with a chemically resistant glaze, is fired and polished to obtain the aforementioned chemically resistant ceramic. After firing, the glaze surface has a gloss level of 95 degrees or higher. After polishing, the glaze surface has a gloss level of 99 degrees or higher.

[0037] It can be fired rapidly in a roller kiln. For example, the firing temperature is 1180-1220℃ and the firing cycle is 40-50 minutes.

[0038] The following examples further illustrate the present invention in detail. It should also be understood that the following examples are only for further explanation of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention are within the scope of protection of the present invention. The specific process parameters, etc., in the following examples are merely examples within a suitable range; that is, those skilled in the art can make appropriate selections within the appropriate range based on the description herein, and are not intended to be limited to the specific values ​​in the examples below.

[0039] Example 1

[0040] Step 1. Press the green body powder into shape to obtain a green body and dry the green body.

[0041] Step 2. Apply a top glaze to the dried body surface. The mineral composition of the top glaze includes, by mass percentage: potassium feldspar 34%, sodium feldspar 19%, kaolin 13%, quartz sand 14%, zirconium silicate 10%, alumina 2%, calcined talc 3%, and calcined kaolin 5%. The chemical composition of the top glaze includes, by mass percentage: SiO2: 65.63%; Al2O3: 18.00%; Fe2O3: 0.15%; TiO2: 0.14%; CaO: 0.27%; MgO: 1.09%; K2O: 3.51%; Na2O: 3.04%; ZrO2: 6.37%; loss on ignition: 1.80%. The top glaze is applied by spraying, with a specific gravity of 1.45 g / cm³. 3 Glazing amount 500g / m 2 .

[0042] Step 3. Inkjet print an ink pattern onto the surface of the glazed body.

[0043] Step 4. Prepare a chemically resistant, fully polished glaze. The mineral composition of the chemically resistant, fully polished glaze includes, by mass percentage: 10% quartz, 10% kaolin, 5% calcined talc, 24% wollastonite, 16% calcined kaolin, 2% calcined alumina, 3% calcined zinc oxide, 5% barium carbonate, 2% titanium oxide, 3% zirconium silicate, and 20% boron frit. The mineral composition of the boron frit includes, by mass percentage: 20% quartz, 10% kaolin, 25% potassium feldspar, 10% calcium carbonate, 6% magnesium carbonate, 6% barium carbonate, 15% borax, and 8% calcined zinc oxide. The chemical composition of the boron ingot includes, by mass percentage: SiO2: 53.83%; Al2O3: 9.09%; CaO: 5.16%; MgO: 2.21%; K2O: 3.12%; Na2O: 4.02%; ZnO: 9.99%; BaO: 5.18%; B2O3: 7.40%. The chemical composition of the chemically resistant fully polished glaze includes, by mass percentage: Loss on ignition: 3.76%; SiO2: 51.83%; Al2O3: 14.24%; Fe2O3: 0.06%; TiO2: 1.99%; CaO: 9.99%; MgO: 2.52%; K2O: 1.34%; Na2O: 1.00%; ZnO: 4.97%; BaO: 4.91%; B2O3: 1.48%; ZrO2: 1.91%. The mineral composition of the chemically resistant fully polished glaze is weighed according to the formula, and additives and water are added. The mixture is ball-milled until homogeneous and sieved to obtain the glaze slurry. The additives are sodium carboxymethyl cellulose (0.2 wt%) and sodium tripolyphosphate (0.3 wt%). The residue of the chemically resistant fully polished glaze slurry after passing through a 325-mesh sieve is 0.6 wt%.

[0044] Step 5. Apply a chemical-resistant full-polish glaze to the surface of the blank after inkjet printing the ink pattern. The chemical-resistant full-polish glaze is applied using a swing-arm glazing machine. The specific gravity of the chemical-resistant full-polish glaze is 1.45 g / cm³. 3 Glazing amount is 450g / m 2 .

[0045] Step 6. Firing and polishing the green body after applying the chemically resistant glaze to obtain chemically resistant ceramics. Rapid firing is performed in a roller kiln at 1220℃ for 45 minutes.

[0046] Figure 1This is an image showing the surface effect of the chemically resistant fully polished glazed ceramic tile from Example 1. The prepared fully polished glazed ceramic tile was tested according to GB / T 3810.13—2016 / ISO 10545-13:1995 (Test Methods for Ceramic Tiles Part 13: Determination of Chemical Resistance). The results showed that the corrosion results for low concentrations of acid (3% hydrochloric acid, 100g / L citric acid) and alkali (30g / L potassium hydroxide) were both ULA level (highest level), while the corrosion results for high concentrations of acid (18% hydrochloric acid, 5% lactic acid) and alkali (100g / L potassium hydroxide) were both UHA level (highest level). After firing, the glaze surface had a gloss of 95 degrees, good transparency, and no obvious pinholes or bubbles. After polishing, the gloss reached 99 degrees.

[0047] Comparative Example 1

[0048] The composition is basically the same as in Example 1, except that the mineral composition of the fully polished glaze includes, by mass percentage: 7% quartz, 10% kaolin, 5% calcined talc, 24% wollastonite, 16% calcined kaolin, 2% calcined alumina, 3% calcined zinc oxide, 5% barium carbonate, 2% titanium oxide, 8% zirconium silicate, and 18% boron frit.

[0049] Figure 2 This is an image of the ceramic tile surface effect in Comparative Example 1. The prepared ceramic tile has an opaque and milky pattern with poor transparency. This is because zirconium silicate raw material has a high melting temperature. Increasing the amount of zirconium silicate used will raise the melting temperature of the formula, causing the glaze to be underfired under the same firing conditions, resulting in an opaque appearance. Due to the underfiring of the glaze, a large number of bubbles are present in the glaze layer, and the surface has many pores after polishing, resulting in poor stain resistance and corrosion resistance.

[0050] Comparative Example 2

[0051] The composition is essentially the same as in Example 1, except that the mineral composition of the fully polished glaze includes, by mass percentage: 10% quartz, 10% kaolin, 5% calcined talc, 24% wollastonite, 16% calcined kaolin, 2% calcined alumina, 3% calcined zinc oxide, 5% barium carbonate, 2% titanium oxide, 3% zirconium silicate, and 20% low-temperature frit. The chemical composition of the low-temperature frit includes, by mass percentage: 48.05% SiO2, 15.20% Al2O3, 13.30% CaO, 5.86% MgO, 4.64% K2O, 2.94% Na2O, 2.91% ZnO, and 7.10% BaO.

[0052] Figure 3This is an image of the ceramic tile surface effect of Comparative Example 2. The prepared ceramic tile pattern is opaque and lacks transparency. This is because the zirconium silicate raw material has a high melting temperature, and the formula does not use alkali metal raw materials to cool it down. It is necessary to use strong fluxing materials such as boron or lithium to effectively lower the melting temperature of the formula. Under the same firing conditions, this results in underfiring of the glaze, leading to an opaque appearance.

[0053] Comparative Example 3

[0054] The composition is basically the same as in Example 1, except that the mineral composition of the fully polished glaze includes, by mass percentage: 10% quartz, 10% kaolin, 5% calcined talc, 20% wollastonite, 10% calcined kaolin, 2% calcined alumina, 3% calcined zinc oxide, 5% barium carbonate, 2% titanium oxide, 3% zirconium silicate, and 30% boron frit.

[0055] Figure 4 The images shown are of the surface and cross-section of the ceramic tile used in Comparative Example 3. The prepared ceramic tile exhibits over-firing of the glaze and poor oxidation of the body. This is because the boron frit has a strong fluxing effect, and over-firing of the glaze causes component decomposition and the generation of bubbles. Simultaneously, a higher amount of boron frit results in a lower initial melting point in the formula, which is detrimental to the venting of the body and glaze layer, leading to defects such as core defects and lower strength. After polishing, the ceramic tile shows numerous visible bubbles, poor oxidation on the cross-section, and poor body strength.

[0056] Comparative Example 4

[0057] The composition is basically the same as in Example 1, except that the mineral composition of the fully polished glaze includes, by mass percentage: 10% quartz, 10% kaolin, 5% calcined talc, 24% wollastonite, 16% calcined kaolin, 2% calcined alumina, 5% calcined zinc oxide, 5% barium carbonate, 3% zirconium silicate, and 20% boron frit.

[0058] Figure 5 The images show the surface finish of ceramic tiles from Comparative Example 4 and Example 1. The prepared ceramic tiles showed no obvious defects in their glaze. The prepared ceramic tiles were tested according to GB / T 3810.13—2016 / ISO 10545-13:1995 (Ceramic tiles, Test methods—Part 13: Determination of chemical resistance). The results showed that the corrosion resistance to high concentrations of alkali (100 g / L potassium hydroxide) was UHB level. Without the introduction of titanium dioxide, the alkali resistance of the formulation was somewhat reduced. Compared to Example 1, the glaze was slightly corroded by high concentrations of alkali. This is because titanium dioxide is an extremely stable compound, and its introduction into the silicate formulation provides Ti… 4+It is a high-valence, small-radius ion with extremely high field strength. In a glass network, it can firmly attract and bind surrounding oxygen ions, acting as a cohesive and contracting agent for the entire glass network. This makes the glass network structure denser and reduces porosity. Lowering porosity further hinders the corrosive medium (H+). + OH - The migration of ) further improves the corrosion resistance of the glaze.

[0059] Comparative Example 5

[0060] The composition is basically the same as in Example 1, except that the mineral composition of the fully polished glaze includes, by mass percentage: 10% quartz, 10% kaolin, 5% calcined talc, 24% wollastonite, 13% calcined kaolin, 2% calcined alumina, 3% calcined zinc oxide, 5% barium carbonate, 5% titanium oxide, 3% zirconium silicate, and 20% boron frit.

[0061] Figure 6 The images show the surface finish of ceramic tiles from Comparative Example 5 and Example 1. The prepared ceramic tiles have no obvious defects in their glaze, but the overall color is a dark yellow. This is because titanium dioxide is a pale yellow oxide, and introducing too much of it is detrimental to inkjet pattern color matching.

[0062] Comparative Example 6

[0063] The composition is basically the same as in Example 1, except that the mineral composition of the fully polished glaze includes, by mass percentage: quartz 10%, kaolin 10%, calcined talc 5%, wollastonite 24%, calcined kaolin 16%, calcined alumina 2%, calcined zinc oxide 6%, barium carbonate 5%, titanium oxide 2%, and boron frit 20%.

[0064] Figure 7 The images show the before-and-after corrosion effects of the ceramic tile in Comparative Example 6. The prepared ceramic tile glaze showed no obvious defects. The prepared ceramic tile was tested according to GB / T 3810.13—2016 / ISO 10545-13:1995 (Ceramic Tile Tests Part 13: Determination of Chemical Resistance). The results showed that the corrosion resistance to high-concentration alkali (100 g / L potassium hydroxide) was UHB level. This comparative example did not introduce zirconium silicate, resulting in a slight decrease in the alkali resistance of the formulation; the ceramic tile in this comparative example was only slightly corroded by high-concentration alkali. This is because zirconium silicate is an extremely stable compound, and its introduction into the silicate formulation provides Zr... 4+ It is a high-valence, small-radius ion with extremely high field strength. In a glass network, it can firmly attract and bind surrounding oxygen ions, acting as a cohesive and contracting agent for the entire glass network. This makes the glass network structure denser and reduces porosity. Lowering porosity further hinders the corrosive medium (H+). + OH -The migration of ) further improves the corrosion resistance of the glaze.

[0065] Comparative Example 7

[0066] The composition is basically the same as in Example 1, except that the mineral composition of the fully polished glaze includes, by mass percentage: 5% quartz, 10% kaolin, 7% calcined talc, 20% wollastonite, 15% potassium feldspar, 15% sodium feldspar, 3% calcined zinc oxide, 2% barium carbonate, 3% zirconium silicate, and 20% boron frit.

[0067] Figure 8 The images show the before-and-after corrosion effects of the ceramic tile in Comparative Example 7. The prepared ceramic tile glaze showed no obvious defects. The prepared ceramic tile was tested according to GB / T 3810.13—2016 / ISO 10545-13:1995 (Ceramic Tile Test Methods Part 13: Determination of Chemical Resistance). The results showed that the corrosion resistance to low-concentration alkali (30 g / L potassium hydroxide) was ULB level, and the corrosion resistance to high-concentration alkali (100 g / L potassium hydroxide) was UHB level. This means that the ceramic tile in this comparative example was severely corroded by high-concentration alkali. This is because the formulation introduced a relatively large amount of alkali metal oxide flux (such as K2O, Na2O), which breaks the strong Si-O-Si network in the glaze, forming negatively charged Si-O... - Points, and with K, which has very weak cohesion. + Na + Non-bridging oxygen bonds are formed to maintain electroneutrality. This results in numerous "breakpoints" in the glass network, making the structure loose and porous. When exposed to H+ and OH-... - At that time, these unstable K + Na + Ions are easily leached out (ion exchange), leaving voids that allow corrosive media to penetrate deeply and further damage the entire network.

Claims

1. A chemical resistant full polish, characterized by, The mineral composition of the chemical corrosion resistant full polishing enamel comprises, in percentage by mass, quartz 5-10%, kaolin 5-10%, calcined talc 1-10%, wollastonite 20-25%, calcined kaolin 10-20%, calcined alumina 1-5%, calcined zinc oxide 1-5%, barium carbonate 1-5%, titanium oxide 1-3%, zirconium silicate 1-5%, boron block 10-20%.

2. The chemical corrosion resistant full polish glaze of claim 1, wherein, The mineral composition of the boron block comprises, in percentage by mass, quartz 10-20%, kaolin 5-10%, potassium feldspar 25-30%, calcium carbonate 5-10%, magnesium carbonate 5-10%, barium carbonate 5-10%, borax 10-20%, calcined zinc oxide 5-10%.

3. The chemical corrosion resistant full polish glaze of claim 2, wherein, The raw materials are weighed according to the mineral composition of the boron block, mixed uniformly, and then melted at 1400-1500 ℃ for 2-3 hours to obtain a glass liquid; and then the glass liquid is quenched in water and crushed to obtain the boron block.

4. The chemical corrosion resistant full polish according to any one of claims 1 to 3, characterized in that, The chemical composition of the boron block comprises, in percentage by mass, SiO2: 50-55%; Al2O3: 5-10%; CaO: 5-10%; MgO: 1-5%; K2O: 1-5%; Na2O: 1-5%; ZnO: 5-10%; BaO: 5-10%; B2O3: 5-10%.

5. The chemical corrosion resistant full polish according to any one of claims 1 to 4, characterized in that, The chemical composition of the chemical corrosion resistant full polishing enamel comprises, in percentage by mass, loss on ignition: 2-5%; SiO2: 50-55%; Al2O3: 10-15%; Fe2O3: 0.01-0.2%; TiO2: 0.1-3%; CaO: 8-12%; MgO: 1-5%; K2O: 1-3%; Na2O: 1-2%; ZnO: 1-5%; BaO: 1-5%; B2O3: 1-3%; ZrO2: 1-3%.

6. A method for producing a chemically resistant ceramic, characterized by, The preparation method comprises: applying a glaze on the surface of the body; inkjet printing an ink pattern on the surface of the body after the glaze is applied; applying the chemical corrosion resistant full polishing enamel according to any one of claims 1-5 on the surface of the body after the ink pattern is inkjet printed; firing and polishing the body after the chemical corrosion resistant full polishing enamel is applied to obtain a chemical corrosion resistant ceramic.

7. The preparation method according to claim 6, characterized in that, The chemical corrosion resistant full polishing enamel is applied by spraying; preferably, the specific gravity of the chemical corrosion resistant full polishing enamel is 1.45-1.50 g / cm 3 , and the enamel application amount is 450-500 g / m 2 .

8. The production method according to claim 6 or 7, characterized by, The firing temperature is 1180-1220 ℃, and the firing period is 40-50 minutes.

9. The production method according to any one of claims 6 to 8, characterized by, The chemical composition of the glaze comprises, in percentage by mass, SiO2: 55-70%; Al2O3: 15-20%; Fe2O3: 0.1-0.3%; TiO2: 0.1-0.2%; CaO: 0.1-0.5%; MgO: 0.5-2%; K2O: 2-5%; Na2O: 2-5%; ZrO2: 5-8%; loss on ignition: 1-3%; preferably, the mineral composition of the glaze comprises, in percentage by mass, potassium feldspar 28-35%, sodium feldspar 15-21%, kaolin 12-18%, quartz sand 12-18%, zirconium silicate 8-12%, alumina 2-5%, calcined talc 2-4%, calcined kaolin 3-8%.

10. The production method according to any one of claims 6 to 9, characterized by, The face glaze is applied by spraying or pouring; preferably, the specific gravity of the face glaze is 1.40-1.50 g / cm 3 , and the amount of glaze applied is 450-650 g / m 2 .

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