Ceramic, method for coloring ceramic body and application of ceramic body

Abstract

The invention belongs to the technical field of ceramic surface decoration, and particularly relates to a ceramic and a method for coloring a ceramic body and application of the ceramic. The ceramic comprises a coloring layer and a transparent glaze layer, and the depth of the coloring layer is 3mm to 8mm. The method comprises the following steps: coloring the surface of a ceramic body with a water-soluble chromophoric salt solution, and glazing. According to the ceramic provided by the invention, the depth of the coloring layer is 3mm-8mm, so that the color of the ceramic has the advantages of durability, physical wear resistance, chemical corrosion resistance and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of ceramic surface decoration, and particularly relates to a kind of ceramic and the method and application of its body color application. BACKGROUND

[0002] Ceramic body color application refers to the surface of ceramic body before firing (green body) or after biscuit firing, color pigments or colorants are applied by drawing, smearing, printing and other ways, and then covered with glaze layer (or directly exposed) and fired at high temperature to form decorative patterns or color effects.

[0003] The existing body color application process can include underglaze color, overglaze color, etc. according to the relationship between color application and glaze layer, and can include spray color, penetration dyeing, etc. according to the classification of color application techniques. Among them, underglaze color refers to directly drawing or coloring pigments on the surface of ceramic green body (or biscuit body) without glaze, then covering a transparent glaze layer, and firing at high temperature (usually 1200℃~1350℃) to make the pigments permanently melt under the glaze layer; the ceramic decorated by this process has single color level and harsh boundaries, and some use colorant mixed glaze for application, with penetration depth less than 0.3mm, and color is easy to fall off. Overglaze color refers to drawing or decorating with low-temperature pigments on the surface of a porcelain that has been high-temperature glaze fired, and then firing at low temperature again (usually 600℃~850℃) to make the pigments fixed on the glaze layer; the ceramic decorated by this process has pigments on the transparent glaze layer, and due to the second low-temperature firing, the pigments are not fused and combined with the glaze layer, so the color is bright but has weak wear resistance; in addition, the pigments usually contain low-melting-point fluxing agents (such as lead and cadmium), which may cause lead and cadmium leaching risk during firing. Spray color is to spray glaze or colorant in mist form to the surface of ceramic body by spray gun or atomizing tool; this process not only has high equipment investment, low material utilization rate and increased cost, but also has high process control difficulty and is easy to cause insufficient color saturation on the surface. Penetration dyeing refers to penetrating coloring agents (such as metal oxides or ceramic colorants) into the body by physical or chemical methods after ceramic forming and before glazing. Its core feature is to make the color evenly diffuse from the surface layer to the inside of the body, forming a natural and soft color transition; however, the existing penetration process has shallow color penetration depth, and different parts of the body have different water absorption rates when manually brushing or soaking, which easily leads to different color depths. SUMMARY

[0004] To solve the above problems, the present application provides a kind of ceramic and the method and application of its body color application. The method makes the chemical reaction interaction between the glaze layer and the color element of the body, the double color system of body-glaze, and the color application of the ceramic has a color penetration depth of 3mm~8mm.

[0005] The present application is realized by the following technical solutions: In a first aspect, the present application provides a kind of ceramic, which comprises a coloring layer and a transparent glaze layer; The depth of the coloring layer is 3mm-8mm.

[0006] In some possible implementation manners, the thickness of the transparent glaze layer is 0.3mm-0.8mm.

[0007] In some possible implementation manners, the transparent glaze layer comprises a high-alumina glaze layer and a surface glaze layer.

[0008] In some possible implementation manners, the content of alumina in the raw materials of the high-alumina glaze layer is greater than 20%.

[0009] In some possible implementation manners, the high-alumina glaze layer comprises raw materials in the following mass fractions: kaolin 25%-50%, alumina 20%-45%, feldspar 18%-20%, limestone 10%-12%, calcium fluoride 0.5%-1%.

[0010] In some possible implementation manners, the content of SiO2 in the surface glaze layer is greater than 65%.

[0011] In some possible implementation manners, the surface glaze layer comprises raw materials in the following mass fractions: 2%-5% kaolin, 1%-3% silane coupling agent, 0.1%-0.4% aluminum chloride, 0.02%-0.03% calcium fluoride, 0.01%-0.02% rare earth oxide, 0.01%-0.02% barium oxide, 0.05%-0.08% disodium ethylenediaminetetraacetate, and the balance is water.

[0012] In a second aspect, the present application provides a method for applying color to a ceramic body, comprising the following steps: applying glaze after applying color to the surface of the ceramic body by using a water-soluble color-developing salt solution.

[0013] In some possible implementation manners, the water-soluble color-developing salt in the water-soluble color-developing salt solution comprises at least one of a sulfate, a nitrate, and a chloride.

[0014] In some possible implementation manners, the water-soluble color-developing salt in the water-soluble color-developing salt solution comprises at least one of cobalt sulfate, iron nitrate, and manganese chloride.

[0015] In some possible implementation manners, the concentration of the water-soluble color-developing salt solution is 0.5mol / L-3mol / L.

[0016] In some possible implementation manners, the surface tension of the water-soluble color-developing salt solution is 28mN / m-35mN / m.

[0017] In some possible implementation manners, the step of applying color comprises: The water-soluble chromogenic salt solution is penetrated after gradient decoration on the surface of the ceramic body.

[0018] In some possible implementations, the water content of the ceramic body in the decoration process is 15% to 18%.

[0019] In some possible implementations, the gradient decoration comprises the following steps: The gradient pen method is used to decorate the surface of the ceramic body.

[0020] In some possible implementations, the trailing speed of the gradient pen method is 0.5 cm / s to 2 cm / s.

[0021] In some possible implementations, the temperature of the penetration is 25°C to 35°C.

[0022] In some possible implementations, the humidity of the penetration is 70% to 85%.

[0023] In some possible implementations, the time of the penetration is 3 min to 15 min.

[0024] In some possible implementations, the glazing comprises the following steps: The high-alumina glaze and the surface glaze are sequentially applied to the surface of the body after decoration.

[0025] In some possible implementations, the preparation of the surface glaze comprises the following steps: The kaolin, calcium fluoride, rare earth oxide, disodium ethylenediaminetetraacetate and silane coupling agent are mixed under stirring and then water is added.

[0026] In some possible implementations, the method further comprises the following steps: The body after glazing is fired.

[0027] In some possible implementations, the atmosphere of the firing is an oxidizing atmosphere.

[0028] In some possible implementations, the temperature of the firing is 1230°C to 1280°C.

[0029] In a third aspect, the application provides an application of the method for decorating the surface of the ceramic body in the field of ceramic surface decoration.

[0030] The ceramic and the method for decorating the surface of the ceramic body provided by the application have at least the following beneficial technical effects compared with the prior art: (1) The depth of the coloring layer of the ceramic provided by the application is 3 mm to 8 mm, so that the color of the ceramic has the advantages of durability, resistance to physical abrasion and resistance to chemical corrosion.

[0031] (2) The ceramic provided by the application has a transparent glaze layer as a protective layer of the ceramic, and the thickness of the transparent glaze layer is 0.3mm-0.8mm, so that the wear resistance, air tightness and chemical stability (acid and alkali corrosion resistance) of the ceramic are improved.

[0032] (3) The method for applying color to the body of the ceramic provided by the application can establish a body-glaze double-chromatographic system, and a single application of color can form a multi-order color gamut.

[0033] (4) The method for applying color to the body of the ceramic provided by the application, the depth of the colored layer of the ceramic after applying color is 3mm-8mm, and the thickness of the transparent glaze layer is 0.3mm-0.8mm. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the drawings or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the drawings, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the structures shown in the drawings.

[0035] Figure 1 The structure schematic diagram of the ceramic provided in the embodiments of the application is shown in the figure. Figure 2 The surface color schematic diagram of the ceramic provided in the embodiment 1 of the application is shown in the figure.

[0036] The figure mark explanation: 1-body; 2-colored layer; 3-transparent glaze layer, 31-high aluminum glaze layer, 32-surface glaze layer.

[0037] The realization of the purpose of the drawings, the functional characteristics and the advantages will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the application more clear, the application will be described and explained in the following embodiments. It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application. Based on the embodiments provided by the application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the application.

[0039] It is apparent that the following description is merely some examples or embodiments of the present application, and the present application can be applied to other similar situations without creative labor for those skilled in the art. In addition, it can be understood that although the efforts made in the development process can be complex and lengthy, some design, manufacture or production changes based on the disclosed technology of the present application are only routine technical means for those skilled in the art related to the disclosed content of the present application, and should not be understood as insufficient disclosure of the present application.

[0040] However, unnecessary detailed description can be omitted. For example, there are cases where detailed description of well-known matters, repeated description of substantially the same structure are omitted. This is to avoid the following description unnecessarily becoming lengthy and to facilitate understanding by those skilled in the art. In addition, the following description is provided to enable those skilled in the art to fully understand the present application, and is not intended to limit the subject matter recited in the claims.

[0041] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions, and all technical features and optional technical features of the present application can be combined with each other to form new technical solutions.

[0042]

Ceramics

[0043] The ceramic provided by the embodiment of the present application has a relatively deep colored layer depth, which can at least make the surface color of the ceramic durable, resistant to physical wear and tear, and resistant to chemical corrosion, etc.

[0044] In the embodiment, the depth of the colored layer is 3mm-8mm, which can be a typical but non-limiting depth of 3mm, 5mm, 8mm, or a range between any two depths. In this case, the colored layer of the ceramic is super-deep coloring, and the internal color can still maintain the original color without discoloration during long-term use and wear.

[0045] In some embodiments, the thickness of the transparent glaze layer is 0.3mm-0.8mm, and in exemplary examples, it can be a typical but non-limiting thickness of 0.3mm, 0.5mm, 0.8mm, or a range between any two thicknesses. In this case, the transparent glaze layer serves as a protective layer for the ceramic, and this thickness improves the wear resistance, air tightness and chemical stability (acid and alkali corrosion resistance) of the ceramic under the premise of meeting the weight requirements of the ceramic.

[0046] In some embodiments, the transparent glaze layer includes a high-alumina glaze layer and a surface glaze layer.

[0047] In some embodiments, the content of alumina in the raw material of the high-alumina glaze layer is greater than 20%. In this case, the melting temperature of the high-alumina glaze is high (about greater than 1300℃), and the high-alumina glaze resists high-temperature softening or decomposition during firing.

[0048] In some embodiments, the high-alumina glaze layer includes the following mass fractions of raw materials: Kaolin 25%~50%, alumina 20%~45%, feldspar 18%~20%, limestone 10%~12%, calcium fluoride 0.5%~1%.

[0049] In the above components of the high-alumina glaze, kaolin, alumina and feldspar are main components of the glaze, which are sources of alumina and silicon oxide, and alumina and silicon oxide react to generate mullite during firing, thereby improving the fire resistance of the ceramic; limestone acts as a flux to promote the reaction of alumina and silicon oxide; calcium fluoride is used to promote the interfacial reaction.

[0050] In some embodiments, the feldspar includes at least one of sodium feldspar and potassium feldspar.

[0051] In some embodiments, the content of SiO2 in the raw material of the surface glaze layer is greater than 65%. In this case, the melting temperature and chemical stability of the glaze can be significantly improved.

[0052] In some embodiments, the surface glaze layer includes the following mass fractions of raw materials: 2%~5% kaolin, 1%~3% silane coupling agent, 0.1%~0.4% aluminum chloride, 0.02%~0.03% calcium fluoride, 0.01%~0.02% rare earth oxide, 0.01%~0.02% barium oxide, 0.05%~0.08% ethylenediaminetetraacetic acid disodium, and the balance is water.

[0053] In some embodiments, the silane coupling agent includes at least one of vinyltriethoxysilane (A-151), N-β-aminoethyl-γ-aminopropyltrimethoxysilane (KH-792), and octyltriethoxysilane (OTES). In this case, the hydrolysis rate of the silane coupling agent is low, and the hydrolysis rate can be effectively controlled during preparation.

[0054] In some embodiments, the rare earth oxide includes at least one of cerium oxide and lanthanum oxide.

[0055]

Method for applying color to a ceramic body

[0056] The method for applying color to a ceramic body provided by the embodiments of the present application uses a water-soluble chromogenic salt solution to apply color and then apply glaze, thereby establishing a body-glaze double-chromogenic system, and a single application of color can form a multi-order color gamut.

[0057] In some embodiments, in the step S10 described above, the water-soluble chromogenic salt in the water-soluble chromogenic salt solution includes at least one of a sulfate salt, a nitrate salt, and a chloride salt.

[0058] In some embodiments, the sulfate salt includes at least one of cobalt sulfate, copper sulfate, ferrous sulfate, iron sulfate, manganese sulfate, nickel sulfate, chromium sulfate, and vanadium sulfate.

[0059] In some embodiments, the nitrate salt includes at least one of cobalt nitrate, copper nitrate, iron nitrate, manganese nitrate, nickel nitrate, chromium nitrate, neodymium nitrate, and cerium nitrate.

[0060] In some embodiments, the chloride salt includes at least one of sodium chloride, cobalt chloride, stannous chloride, magnesium chloride, iron chloride, nickel chloride, zinc chloride, manganese chloride, and chromium chloride.

[0061] In some embodiments, in the step S10 described above, the water-soluble chromogenic salt in the water-soluble chromogenic salt solution includes at least one of cobalt sulfate, iron nitrate, and manganese chloride.

[0062] In some embodiments, in the step S10 described above, the concentration of the water-soluble chromogenic salt solution is 0.5 mol / L to 3 mol / L, and in exemplary embodiments, the concentration can be 0.5 mol / L, 1 mol / L, 3 mol / L, or any range between any two of the concentrations. In this case, the water-soluble chromogenic salt penetrates into the surface layer of the ceramic body with water, and a colored layer with a depth of 3 mm to 8 mm is obtained after firing.

[0063] In some embodiments, in the step S10 described above, the preparation of the water-soluble chromogenic salt solution includes the following steps: S101. After the water-soluble chromogenic salt and water are mixed, 0.01% Tween 20 is added to adjust the surface tension.

[0064] In some embodiments, in the step S101 described above, the surface tension of the water-soluble chromogenic salt solution is 28 mN / m to 35 mN / m.

[0065] In some embodiments, in the step S10 described above, the step of applying color includes: S102. The water-soluble chromogenic salt solution penetrates after being applied to the surface of the ceramic body.

[0066] In some embodiments, in step S102, the water content of the ceramic body is 15% to 18% during the color application process. In exemplary embodiments, the water content can be 15%, 16%, 17%, 18%, or any range between any two of the above values. In this case, the water-soluble colorant salt solution can easily penetrate into the ceramic body.

[0067] In some embodiments, in step S102, the porosity of the ceramic body is 25% to 35% (i.e., the water absorption is 12% to 15%) during the color application process.

[0068] In some embodiments, in step S102, the color application process comprises the following steps: S1021. Apply color to the surface of the ceramic body using the gradient pen method.

[0069] In the color application process described above, the water-soluble colorant salt solution can diffuse into the ceramic body based on the concentration gradient of Fick's second law, forming a multi-level color gamut.

[0070] In some embodiments, in step S1021, the drag speed of the gradient pen method is 0.5 cm / s to 2 cm / s. In exemplary embodiments, the speed can be 0.5 cm / s, 1.5 cm / s, 2 cm / s, or any range between any two of the above values. In this case, a single color application can form a multi-level color gamut on the ceramic surface, and the color level after firing can be 8 to 12 levels.

[0071] In some embodiments, in step S102, the temperature of the penetration is 25°C to 35°C. In exemplary embodiments, the temperature can be 25°C, 30°C, 35°C, or any range between any two of the above values. In some embodiments, in step S101, the humidity of the penetration is 70% to 85%. In exemplary embodiments, the humidity can be 70%, 80%, 85%, or any range between any two of the above values. In this case, the water-soluble colorant salt solution can penetrate into the body in a capillary manner.

[0072] In some embodiments, in step S102, the time of the penetration is 3 min to 15 min. In exemplary embodiments, the time can be 3 min, 8 min, 15 min, or any range between any two of the above values. In this case, the water-soluble colorant salt solution can deeply penetrate into the body, and the final coloring layer after firing can be 3 mm to 8 mm in depth.

[0073] In some embodiments, in step S10, the glazing process comprises the following steps: S103. Apply high-alumina glaze and surface glaze to the surface of the body after color application.

[0074] In some embodiments, in the step S103 above, the preparation of the high-alumina glaze includes the following steps: S1031. Mixing kaolin, alumina, feldspar, limestone, calcium fluoride and glycerol.

[0075] In the preparation of the high-alumina glaze above, the glycerol adjusts the viscosity of the high-alumina glaze. It should be noted that the viscosity of the high-alumina glaze can be routinely adjusted according to actual needs, which is not particularly limited in the embodiments of the present application.

[0076] In some embodiments, in the step S1031 above, the mixing method includes ball milling. It should be noted that the conditions for ball milling mixing are conventional in the art, and therefore are not particularly limited in the embodiments of the present application.

[0077] In some embodiments, in the step S103 above, the preparation of the surface glaze includes the following steps: S1032. Mixing kaolin, aluminum chloride, calcium fluoride, rare earth oxide, barium oxide, disodium ethylenediaminetetraacetate and silane coupling agent under stirring, and then adding water.

[0078] S1033. Filtering, mixing the filter residue with glycerol to obtain the surface glaze.

[0079] In the preparation of the surface glaze above, the raw materials except water are mixed uniformly, and then water is added. The aluminum chloride and the silane coupling agent in-situ hydrolyze to obtain silica sol and alumina sol, and the other raw materials (kaolin, calcium fluoride, rare earth oxide, etc.) can be uniformly dispersed in the sol. Fluorine in calcium fluoride reacts with rare earth oxide at high temperature to form rare earth fluoride, which can improve the refractive index of the glaze layer. Disodium ethylenediaminetetraacetate provides an acidic environment for the hydrolysis of the silane coupling agent, and at the same time forms a complex with calcium ions to prevent the precipitation of silicon dioxide produced by the hydrolysis of the silane coupling agent, resulting in uneven composition of the glaze. After filtering, the filter residue is used to adjust the viscosity of the glaze to obtain a surface glaze with the desired viscosity. During firing, alumina and silicon oxide can form mullite with fine grains, improving the wear resistance of the glaze layer; calcium fluoride promotes interfacial reaction; and rare earth oxide and barium oxide can further refine the grains of the glaze layer. It should be noted that the viscosity of the surface glaze can be routinely adjusted according to actual needs, which is not particularly limited in the embodiments of the present application.

[0080] In some embodiments, in the step S1033 above, the mixing method includes ball milling. It should be noted that the conditions for ball milling mixing are conventional in the art, and therefore are not particularly limited in the embodiments of the present application.

[0081] In some embodiments, the method for decorating the body of the ceramic above further includes the following step: S20. Firing the body after glazing.

[0082] In some embodiments, in the step S20, the atmosphere for firing is an oxidizing atmosphere.

[0083] In some embodiments, in the oxidizing atmosphere, the volume fraction of oxygen is 20% or more.

[0084] In some embodiments, the oxidizing atmosphere comprises air.

[0085] In some embodiments, in the step S20, the temperature for firing is 1230-1280℃.

[0086] In some embodiments, in the step S20, the time for firing is 12-18h.

[0087] In some embodiments, a method for applying color to a ceramic body is provided, comprising the following steps: S11. applying a water-soluble color-developing salt solution to the surface of the ceramic body, and then applying glaze.

[0088] S21. firing the ceramic body after glazing.

[0089] In some embodiments, a method for applying color to a ceramic body is provided, comprising the following steps: S12. applying a water-soluble color-developing salt solution containing cobalt sulfate to the surface of the ceramic body, and then applying glaze.

[0090] S22. firing the ceramic body after glazing.

[0091] In the above method, during firing, the following color-developing synergistic effect reactions occur between the body and the color-developing salt, and between the color-developing salt and the glaze: (1) inside the body: CoO + Al2O3→ CoAl2O4 (blue spinel structure); (2) at the interface of the glaze layer: CoO + SiO2→ CoSiO3 (violet glass phase); (3) in the transition region: Co3O4 (black oxidation state crystal phase).

[0092] Thus, the method provided by the embodiments of the present application can establish a body-glaze layer double-color-developing system, and a single color application can form a multi-order color gamut.

[0093] The following will be further described in conjunction with specific embodiments. For the convenience of description, in the following examples or comparative examples, unless otherwise specified, the glaze is prepared by conventional ball milling, and the raw materials of the glaze are all chemically pure.

[0094] Example 1 Example 1 provides a ceramic, the depth of the colored layer is 8mm, and the thickness of the transparent glaze layer is 0.5mm. The transparent glaze layer comprises a high-alumina glaze layer and a surface glaze layer. The raw material components and mass fractions of the high-alumina glaze layer are as follows: 40% of kaolin, 30% of alumina, 18% of sodium feldspar, 11% of limestone, and 1% of calcium fluoride.

[0095] The raw material components and mass fractions of the surface glaze layer are as follows: 5% of kaolin, 2% of A-151, 0.3% of aluminum chloride, 0.025% of calcium fluoride, 0.01% of lanthanum oxide, 0.02% of barium oxide, 0.07% of disodium ethylenediaminetetraacetate, and the balance of water.

[0096] The embodiment also provides a method for applying color to a ceramic body, and the steps are as follows: E10. Preparation of a cobalt sulfate (water-soluble chromogenic salt) solution Cobalt sulfate and water are obtained according to a target cobalt sulfate concentration of 3 mol / L, mixed, and then 0.01% Tween 20 is added to adjust the surface tension, to obtain a cobalt sulfate solution with a surface tension of 30 mN / m.

[0097] E20. Color application treatment E201. The cobalt sulfate solution is applied to the surface of the ceramic body by using a gradient pen method. The drag pen speed of the gradient pen method is 1 cm / s, the water content of the ceramic body is 18%, and the porosity of the ceramic body is 25%.

[0098] E202. Penetration in an environment with a temperature of 30°C and a humidity of 80% for 10 min.

[0099] E30. Glazing E301. Preparation of a surface glaze: kaolin, aluminum chloride, calcium fluoride, lanthanum oxide, barium oxide, disodium ethylenediaminetetraacetate, and A-151 are mixed, and then water is added; filtration is performed, the filter residue is mixed with glycerol balls, and a surface glaze is obtained.

[0100] E302. Preparation of a high-alumina glaze: kaolin, alumina, feldspar, limestone, calcium fluoride, and glycerol balls are mixed, and a high-alumina glaze is obtained.

[0101] E303. The high-alumina glaze and the surface glaze are sequentially applied to the surface of the body after color application. E40. Firing The body after glazing is fired at 1280°C in an air atmosphere for 15 h to obtain the ceramic provided in the embodiment.

[0102] Embodiment 2 Embodiment 2 provides a ceramic, the depth of the colored layer is 5 mm, and the thickness of the transparent glaze layer is 0.8 mm. The transparent glaze layer comprises a high-alumina glaze layer and a surface glaze layer. The raw material components and mass fractions of the high-aluminum glaze are as follows: 50% of kaolin, 20% of alumina, 19% of sodium feldspar, 10% of limestone, and 1% of calcium fluoride.

[0103] The raw material components and mass fractions of the surface glaze layer are as follows: 2% of kaolin, 1% of A-151, 0.4% of aluminum chloride, 0.02% of calcium fluoride, 0.02% of lanthanum oxide, 0.01% of barium oxide, 0.05% of disodium ethylenediaminetetraacetate, and the balance of water.

[0104] The method for applying color to the ceramic body provided in this embodiment also has the same steps as those in Embodiment 1, except that: In step E201, the dragging speed of the gradient pen is 2 cm / s, the water content of the ceramic body is 17%, and the porosity of the ceramic body is 30%.

[0105] In step E202, the penetration is performed in an environment with a temperature of 35℃ and a humidity of 70% for 12 min.

[0106] E40. Firing The glaze-applied body is fired in an air atmosphere at 1250℃ for 15 h.

[0107] Embodiment 3 Embodiment 3 provides a ceramic, the depth of the colored layer is 3 mm, and the thickness of the transparent glaze layer is 0.3 mm. The transparent glaze layer comprises a high-aluminum glaze layer and a surface glaze layer. The raw material components and mass fractions of the high-aluminum glaze are as follows: 25% of kaolin, 42.5% of alumina, 20% of potassium feldspar, 12% of limestone, and 0.5% of calcium fluoride.

[0108] The raw material components and mass fractions of the surface glaze layer are as follows: 3% of kaolin, 3% of KH-792, 0.1% of aluminum chloride, 0.03% of calcium fluoride, 0.011% of cerium oxide, 0.02% of barium oxide, 0.08% of disodium ethylenediaminetetraacetate, and the balance of water.

[0109] The method for applying color to the ceramic body provided in this embodiment also has the same steps as those in Embodiment 1, except that: In step E201, the dragging speed of the gradient pen is 0.5 cm / s, the water content of the ceramic body is 15%, and the porosity of the ceramic body is 25%.

[0110] In step E202, the penetration is performed in an environment with a temperature of 30℃ and a humidity of 85% for 3 min.

[0111] In step E40, the firing temperature is 1280℃, and the firing time is 12 h.

[0112] Embodiment 4 Example 4 provides a kind of ceramic, the depth of coloring layer is 3mm, the thickness of transparent glaze layer is 0.6mm; Transparent glaze layer includes high alumina glaze layer and surface glaze layer; The raw material components and mass fraction of high alumina glaze are: 50% kaolin, 20% alumina, 19% sodium feldspar, 10% limestone and 1% calcium fluoride.

[0113] The raw material components and mass fraction of surface glaze layer are: 2% kaolin, 3% A-151, 0.2% aluminum chloride, 0.03% calcium fluoride, 0.02% lanthanum oxide, 0.01% barium oxide, 0.06% disodium ethylenediaminetetraacetate, and the balance is water.

[0114] This embodiment also provides a method for applying color to the body of the ceramic provided by this embodiment, which has basically the same steps as those of Example 1, except that: In step E201, the dragging speed of the gradient pen is 2cm / s, the water content of the ceramic body is 17%, and the porosity of the ceramic body is 30%.

[0115] In step E202, the penetration is carried out in an environment with a temperature of 35℃ and a humidity of 70% for 12min.

[0116] In step E40, the firing temperature is 1230℃, and the firing time is 18h.

[0117] Example 5 Example 5 provides a kind of ceramic, the depth of coloring layer is 8mm, the thickness of transparent glaze layer is 0.8mm.

[0118] This embodiment also provides a method for applying color to the body of the ceramic provided by this embodiment, which has basically the same steps as those of Example 1, except that: In step E10, the water-soluble color-developing salt in the water-soluble color-developing salt solution is iron nitrate, and the concentration is 1mol / L.

[0119] Example 6 Example 6 provides a kind of ceramic, the depth of coloring layer is 8mm, the thickness of transparent glaze layer is 0.7mm.

[0120] This embodiment also provides a method for applying color to the body of the ceramic provided by this embodiment, which has basically the same steps as those of Example 1, except that: In step E10, the water-soluble color-developing salt in the water-soluble color-developing salt solution is manganese chloride, and the concentration is 2mol / L.

[0121] Example 7 Example 7 provides a kind of ceramic, the depth of coloring layer is 8mm, the thickness of transparent glaze layer is 0.6mm.

[0122] The embodiment also provides a method for applying color to a ceramic body, which has the same steps as those in the embodiment 1, except that: In step E10, the water-soluble chromogenic salt in the water-soluble chromogenic salt solution is iron nitrate and manganese chloride, and the total concentration is 3 mol / L.

[0123] Embodiment 8 The embodiment 8 provides a ceramic, the depth of the colored layer is 8 mm, and the thickness of the transparent glaze layer is 0.6 mm.

[0124] The embodiment also provides a method for applying color to a ceramic body, which has the same steps as those in the embodiment 1, except that: In step E10, the water-soluble chromogenic salt in the water-soluble chromogenic salt solution is cobalt sulfate and iron nitrate, and the total concentration is 2 mol / L.

[0125] Embodiment 9 The embodiment 9 provides a ceramic, the depth of the colored layer is 8 mm, and the thickness of the transparent glaze layer is 0.6 mm.

[0126] The embodiment also provides a method for applying color to a ceramic body, which has the same steps as those in the embodiment 1, except that: In step E10, the water-soluble chromogenic salt in the water-soluble chromogenic salt solution is cobalt sulfate, iron nitrate and manganese chloride, and the total concentration is 3 mol / L.

[0127] Comparative Example 1 The comparative example 1 provides a method for applying color to a ceramic body, which has the following steps: D10. Preparation of a cobalt sulfate (water-soluble chromogenic salt) solution Cobalt sulfate and water are obtained according to the target concentration of 3 mol / L of cobalt sulfate, mixed, and then 0.01% Tween 20 is added to adjust the surface tension, so as to obtain a cobalt sulfate solution with a surface tension of 30 mN / m.

[0128] D20. Color application treatment D201. The ceramic body is immersed in the cobalt sulfate (water-soluble chromogenic salt) solution for 30 min; The water content of the ceramic body is 20%, and the porosity of the ceramic body is 25%.

[0129] D202. After soaking, drying at a temperature of 100 ℃ for 1 h.

[0130] D30. Glazing High-alumina glaze is applied to the surface of the body after color application; The components and mass fractions of the high-alumina glaze are as follows: 40% kaolin, 30% alumina, 18% sodium feldspar, 11% limestone and 1% calcium fluoride.

[0131] D40. Firing The glazed body was fired in air atmosphere at 1280℃ for 15h to obtain the ceramic.

[0132] Comparative Example 2 Comparative Example 2 provides a method for applying color to a ceramic body, the steps of which are basically the same as Comparative Example 1, except that: In step D201, a solution of cobalt sulfate (water-soluble color-developing salt) was sprayed onto the ceramic body by spray deposition, with an atomization pressure of 0.4 MPa.

[0133] Comparative Example 3 Comparative Example 3 provides a method for applying color to a ceramic body, the steps of which are basically the same as Example 1, except that: In step E30, only a surface glaze was applied to the surface of the body after the color was applied.

[0134] Comparative Example 4 Comparative Example 4 provides a method for applying color to a ceramic body, the steps of which are basically the same as Example 1, except that: In step E30, only a high-alumina glaze was applied to the surface of the body after the color was applied.

[0135] Comparative Example 5 Comparative Example 5 provides a method for applying color to a ceramic body, the steps of which are basically the same as Example 1, except that: In step E30, an aluminum glaze and a surface glaze were sequentially applied to the surface of the body after the color was applied. The components and mass fractions of the aluminum glaze are: kaolin 50%, potassium feldspar 25%, limestone 11%, borax 14%.

[0136] The components and mass fractions of the surface glaze are: quartz 55%, potassium feldspar 25%, kaolin 12%, calcium carbonate 8%.

[0137] Comparative Example 6 Comparative Example 6 provides a method for applying color to a ceramic body, the steps of which are basically the same as Example 1, except that: The body was directly fired after the color was applied to the surface of the body, without glazing.

[0138] Comparative Example 7 Comparative Example 7 provides a method for applying color to a ceramic body, the steps of which are basically the same as Example 1, except that: The raw material components and mass fractions of the surface glaze used are: 7% kaolin, 0.3% aluminum chloride, 0.025% calcium fluoride, 0.01% lanthanum oxide, 0.02% barium oxide, 0.07% disodium ethylenediaminetetraacetate, and the balance is A-151.

[0139] Accordingly, in step E301, the preparation step of the surface glaze is: under stirring conditions, kaolin, calcium fluoride, lanthanum oxide, disodium ethylenediaminetetraacetate and A-151 are ball-milled and mixed.

[0140] To verify the progress of the ceramic and the body color application method of the embodiment of the application, the following performance detection experiments were conducted on the ceramic provided by the embodiment of the application and the comparative example and the ceramic prepared therefrom, and the results are shown in Table 1 below: (1) Abrasion resistance test The Taber abrasion tester was used to detect the abrasion resistance of the ceramic surface.

[0141] Among them, the grinding wheel type is CS-10; the rotation speed is 60 rpm; the load is 500g~1000g; the friction cycle is 500rpm~1000rpm; and the friction time is 10min.

[0142] (2) The corrosion resistance of the ceramic surface was tested according to the standard ISO 28706 Test conditions: the sample was immersed in 4% HCl solution for 24h.

[0143] (3) The depth of the colored layer and the thickness of the transparent glaze layer were measured, and the color distribution of the colored layer was observed.

[0144] Table 1

[0145] From the above Table 1, it can be seen that: 1) The ceramic provided by the embodiment of the application has durable color.

[0146] 2) The ceramic provided by the embodiment of the application has a transparent glaze layer as a protective layer of the ceramic, with a thickness of 0.3mm~0.8mm, which improves the abrasion resistance, air tightness and chemical stability (acid and alkali corrosion resistance) of the ceramic.

[0147] 3) The body color application method of the ceramic provided by the embodiment of the application can establish a body-glaze dual-chromic system, and a single color application can form a multi-order color gamut.

[0148] 4) The body color application method of the ceramic provided by the embodiment of the application, the transparent glaze layer made of high-alumina glaze and surface glaze makes the ceramic have very high abrasion resistance, air tightness and chemical stability (acid and alkali corrosion resistance).

[0149] 5) The method for applying color to the ceramic body provided by the embodiment of the present application, in the preparation process of the surface glaze, the silane coupling agent is the main source of silicon dioxide; the kaolin is the source of silicon dioxide and aluminum oxide; the calcium fluoride is used to promote the interface reaction, at the same time, the fluorine in it reacts with the rare earth oxide to generate rare earth fluoride at high temperature, thereby improving the refractive index of the glaze layer; the disodium ethylenediaminetetraacetate provides the acidic environment for the hydrolysis of the silane coupling agent, at the same time, forms a complex with calcium ions, prevents the silicon dioxide produced by the hydrolysis of the silane coupling agent from precipitating, causes the uneven composition of the glaze, and further reduces the corrosion resistance of the ceramic surface.

[0150] It should be noted that the present application is not limited to the above-described embodiments. The above-described embodiments are only examples, and embodiments having substantially the same configuration and exerting the same effects as the technical idea within the scope of the technical solution of the present application are all included in the technical scope of the present application. Furthermore, within the scope of the gist of the present application, various modifications that can be thought of by those skilled in the art, other modes constructed by combining part of the elements of the embodiments are also included in the scope of the present application.

Claims

1. A ceramic, characterized by, The ceramic body comprises a colored layer and a transparent glaze layer. The depth of the colored layer is 3mm-8mm.

2. The ceramic according to claim 1, characterized in that The thickness of the transparent glaze layer is 0.3mm-0.8mm. The transparent glaze layer comprises a high-alumina glaze layer and a surface glaze layer.

3. The ceramic according to claim 2, characterized in that The content of alumina in the raw material of the high-alumina glaze layer is greater than 20%. The high-alumina glaze layer comprises the following raw materials in mass fraction: 25%-50% of kaolin, 20%-45% of alumina, 18%-20% of feldspar, 10%-12% of limestone, and 0.5%-1% of calcium fluoride. The content of SiO2 in the surface glaze layer is greater than 65%. The surface glaze layer comprises the following raw materials in mass fraction: 2%-5% of kaolin, 1%-3% of silane coupling agent, 0.1%-0.4% of aluminum chloride, 0.02%-0.03% of calcium fluoride, 0.01%-0.02% of rare earth oxide, 0.01%-0.02% of barium oxide, and 0.05%-0.08% of disodium EDTA, and the rest is water.

4. A method of decorating a ceramic body according to any one of claims 1 to 3, characterized in that, The method comprises the following steps: The water-soluble chromogenic salt solution is applied to the surface of the ceramic body after glazing.

5. The method of applying decoration to a ceramic body according to claim 4, characterized in that, The water-soluble chromogenic salt in the water-soluble chromogenic salt solution comprises at least one of sulfate, nitrate, and chloride. The concentration of the water-soluble chromogenic salt solution is 0.5mol / L-3mol / L. The surface tension of the water-soluble chromogenic salt solution is 28mN / m-35mN / m. The water-soluble chromogenic salt in the water-soluble chromogenic salt solution comprises at least one of cobalt sulfate, iron nitrate, and manganese chloride.

6. A method of decorating a ceramic body according to claim 4 or 5, characterized in that, The step of applying the water-soluble chromogenic salt solution to the surface of the ceramic body comprises gradient application and penetration. The water content of the ceramic body during the application is 15%-18%. The glazing comprises the following steps: applying the high-alumina glaze and the surface glaze to the surface of the ceramic body in sequence.

7. The method of claim 6, wherein the ceramic body is decorated by, The gradient application comprises the step of applying the water-soluble chromogenic salt solution to the surface of the ceramic body by gradient pen method. The temperature of the penetration is 25°C-35°C. The humidity of the penetration is 70%-85%. The time of the penetration is 3min-15min.

8. A method of decorating a ceramic body according to any one of claims 4 to 7, characterised in that, The method further comprises the following steps: The ceramic body after glazing is fired.

9. The method of claim 8, wherein The firing atmosphere is oxidation atmosphere. The firing temperature is 1230°C-1280°C.

10. The application of the method for applying color to the ceramic body according to any one of claims 4-9 in the field of ceramic surface decoration.

Images