Ceramic glaze, ceramic product and preparation method thereof

Abstract

The invention relates to a ceramic glaze, a ceramic product and a preparation method thereof. The ceramic glaze is prepared from the following components in parts by mass: 57.5 to 61 parts of basic glaze, 1 to 2.5 parts of first frit and 38 to 40 parts of second frit, wherein the first frit is prepared from the following chemical components in percentage by mass: 63.11 percent to 64.7 percent of SiO2, 8.32 percent to 9.22 percent of Al2O3, 12.58 percent to 13.05 percent of CaO, 1.01 percent to 1.15 percent of MgO, 4.82 percent to 4.95 percent of K2O, 1.32 percent to 1.55 percent of Na2O and 2.12 percent to 3.15 percent of B2O3; the second frit is prepared from the following chemical components in percentage by mass: 61.6 percent to 63.4 percent of SiO2, 12.8 percent to 13.7 percent of Al2O3, 16 percent to 16.5 percent of CaO, 1.95 percent to 2.22 percent of MgO, 2.8 percent to 3.1 percent of K2O, 1.1 percent to 1.6 percent of Na2O and 3.75 percent to 3.95 percent of ZnO. The ceramic glaze can be uniformly glazed on a ceramic body with a relief pattern, and black is not exposed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ceramic materials, in particular to a ceramic glaze, a ceramic product and a preparation method thereof. BACKGROUND

[0002] Currently, the methods for preparing a relief pattern on a ceramic surface include: (1) forming a raised line effect on the surface of a ceramic body by stacking relief glaze powder, however, glaze has high temperature melting property, and the glaze layer is prone to collapse when the relief glaze powder stacking process is used, and a sharp line pattern cannot be formed; (2) forming a relief pattern line on a ceramic body artificially, and then spraying a glaze, however, this method is prone to glaze hanging defects, black exposure, and even large-area glaze baldness. SUMMARY

[0003] Therefore, the present application provides a ceramic glaze which can be evenly hung on a ceramic body with a relief pattern and does not expose black.

[0004] In addition, the present application also provides a ceramic product and a preparation method thereof.

[0005] A ceramic glaze, by mass fraction, includes: 57.5-61 parts of a base glaze, 1-2.5 parts of a first frit, and 38-40 parts of a second frit.

[0006] The chemical composition of the first frit includes, by mass percentage, SiO2 63.11%-68%, Al2O3 8.32%-9.22%, CaO 12.58%-13.05%, MgO 1.01%-1.15%, K2O 4.82%-4.95%, Na2O 1.32%-1.55%, and B2O3 2.12%-3.15%; and the chemical composition of the second frit includes, by mass percentage, SiO2 61.6%-63.4%, Al2O3 12.8%-13.7%, CaO 16%-16.5%, MgO 1.95%-2.22%, K2O 2.8%-3.1%, Na2O 1.1%-1.6%, and ZnO 3.75%-3.95%.

[0007] Optionally, the chemical composition of the base glaze includes, by mass percentage, SiO2 66.6%-69.7%, Al2O3 13.21%-14.12%, CaO 7.58%-7.85%, MgO 0.92%-1.05%, K2O 2.73%-3%, Na2O 1.95%-2.05%, ZrO2 5.45%-5.85%, and ZnO 1.55%-1.95%.

[0008] Optionally, the ceramic glaze comprises, in mass parts: base glaze 59-60 parts, first frit 2-2.5 parts, and second frit 38-39 parts; and / or,

[0009] The ceramic glaze further comprises: nano material 0.5-1 parts; optionally, the nano material comprises one or more of sodium molybdate, bismuth molybdate, and zinc molybdate.

[0010] A ceramic product, comprising: a ceramic body and a glaze layer disposed on a surface of the ceramic body, the surface of the ceramic body having a relief pattern, the glaze layer being prepared by the above ceramic glaze.

[0011] Optionally, the glaze layer has a thickness of 0.4-0.5 mm; and / or,

[0012] The ceramic product comprises a sanitary ceramic product.

[0013] A method for preparing a ceramic product, comprising the following steps:

[0014] applying a ceramic glaze on a surface of a ceramic body, firing to obtain a ceramic product;

[0015] The surface of the ceramic body has a relief pattern, and the ceramic glaze is the above ceramic glaze.

[0016] Optionally, the step of applying a ceramic glaze on a surface of a ceramic body comprises:

[0017] mixing the ceramic glaze with water and ball milling to obtain a glaze slurry;

[0018] spraying the glaze slurry on the surface of the ceramic body, so that the wet film thickness after spraying is 0.5-0.7 mm, and drying.

[0019] Optionally, in the step of firing, the firing peak temperature is 1210-1280°C, and the holding time at the firing peak temperature is 0.5-1.5 h.

[0020] Optionally, the ceramic body is prepared by a slip casting process.

[0021] Optionally, the ceramic body is prepared by the following steps:

[0022] injecting a ceramic body slurry into a mold for static forming, demolding to obtain a wet body, the mold having internal stripes corresponding to the relief pattern, the internal stripe size being obtained according to the relief pattern size and the shrinkage rate of the ceramic body slurry during forming;

[0023] drying the wet body to prepare the ceramic body.

[0024] Optionally, the mold has a plurality of first stripes extending in a first direction and a plurality of second stripes extending in a second direction, the first direction and the second direction intersect, and the second stripes have a depth greater than that of the first stripes.

[0025] Optionally, the first direction and the second direction are perpendicular to each other.

[0026] Optionally, the shrinkage of the ceramic body slurry during molding is 5-6%, the depth of each first stripe is 3-5 mm, the depth of the second stripes is 0.2-0.4 mm greater than that of the first stripes, and the distance between adjacent two first stripes and adjacent two second stripes is independently 1-3 mm.

[0027] Optionally, the mold is prepared by CNC machining; optionally, the CNC machining precision is within 1 mm; and / or,

[0028] The mold is a plaster mold; and / or,

[0029] The standing molding time is 75-85 min; and / or,

[0030] In the step of drying the wet body, the temperature is 50-65°C, and the time is 24-48 h.

[0031] The ceramic glaze of the present application comprises a basic glaze, a first frit and a second frit in a certain ratio. By introducing a specially designed frit system, the performance of the glaze surface is optimized. The second frit can accurately control the critical surface tension of the glaze, so that the glaze still maintains excellent spreading property and adhesion on the surface of the ceramic body with sharp edges or complex reliefs, thereby ensuring uniform coverage of the glaze layer, clear outline and distinct details. At the same time, the first frit contained in the formula can effectively adjust the elastic modulus of the glaze layer, enhance its anti-deformation ability, and significantly reduce the risk of glaze shrinking, cracking and other defects caused by mismatched body glaze shrinkage. Therefore, the ceramic glaze of the present application can be applied to ceramic bodies with relief patterns, achieving uniform glazing without showing black, so that the relief pattern lines of the ceramic product are sharp and have a certain aesthetic appeal. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0033] Figure 1 It is a process flow diagram of the preparation method of the ceramic product of some embodiments of the present application.

[0034] Figure 2 A photograph of a ceramic body used for the examples and comparative examples of the present application;

[0035] Figure 3 A graph of the glaze thickness measurement results of the ceramic product prepared in Example 2;

[0036] Figure 4 A schematic view of the appearance of the ceramic product prepared in Example 2;

[0037] Figure 5 A schematic view of the appearance of the ceramic product prepared in Comparative Example 1;

[0038] Figure 6 A graph of the glaze thickness measurement results of the ceramic product prepared in Comparative Example 1. DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of the present application, the present application will be described more fully below in conjunction with specific embodiments. The preferred embodiments of the present application are given in the specific embodiments. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein only for the purpose of describing the specific embodiments and is not intended to limit the present application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0041] Unless otherwise indicated or contradictory, the terms or phrases used in the present application have the following meanings:

[0042] In the present application, "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features.

[0043] In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0044] In the present application, "one or more" means any one, any two or any two or more of the listed items. Among them, "a plurality of" means any two or more.

[0045] In the present application, the percentage concentration involved, if not specifically stated, refers to the final concentration. The final concentration refers to the proportion of the added component in the system after the component is added.

[0046] In the present application, "further", "furthermore", "in particular", "for example", "such as", "for instance", "for example" and the like are used for the purpose of description and indicate that the different technical solutions before and after have a correlation in the scope of coverage, but should not be understood as a limitation on the previous technical solution, nor should it be understood as a limitation on the scope of protection herein. In this article, unless otherwise stated, A (such as B) means that B is one non-limiting example of A, and it can be understood that A is not limited to B.

[0047] In the present application, "optionally", "optional" and "optional" mean that it can or can not be present, that is, it means to select from either of the two parallel schemes "have" or "have not". If there are multiple "options" in a technical solution, unless otherwise stated, and there is no contradiction or mutual restriction, each "option" is independent. In the present application, "optionally contains", "optionally contains" and the like indicate "contains or does not contain". "Optional component X" means that component X exists or does not exist, or that it contains or does not contain the component X.

[0048] When a numerical range is disclosed in the present application, the above range is considered to be continuous and includes the minimum value and the maximum value of the range, as well as every value between the minimum value and the maximum value. Further, when the range is an integer, every integer between the minimum value and the maximum value of the range is included. In addition, when multiple ranges are provided to describe a feature or characteristic, the ranges can be combined. In other words, unless otherwise indicated, all ranges disclosed in the present application should be understood to include any and all sub-ranges included therein.

[0049] In the present application, the technical features described in an open manner include both the closed technical solutions consisting of the listed features and the open technical solutions containing the listed features.

[0050] The terms "comprising" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed, or can optionally include other steps or components inherent to the process, method, product or device.

[0051] Reference to“an embodiment” or“the embodiment” in this application means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in one embodiment” or“in at least one embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a common embodiment, or an embodiment that is independent of all other embodiments. One of ordinary skill in the art will readily recognize from the disclosure herein, that the embodiments described with the application can be incorporated with other embodiments unless expressly excluded.

[0052] In the flowcharts of the present application, although each step is displayed in sequence according to the indication of the arrow, these steps are not necessarily performed in sequence according to the indication of the arrow, unless it is explicitly stated herein, the execution of these steps is not strictly limited in sequence, and they can be executed in other sequences. In addition, at least part of the steps in the figure can include multiple sub-steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence is not necessarily sequential, but can be alternately executed with at least part of other steps or other sub-steps or stages.

[0053] The first aspect of the present application provides a ceramic glaze, comprising, in parts by mass: base glaze 57.5-61 parts, first frit 1-2.5 parts, and second frit 38-40 parts.

[0054] The chemical composition of the first frit includes, in percentage by mass: SiO2 63.11-68%, Al2O3 8.32-9.22%, CaO 12.58-13.05%, MgO 1.01-1.15%, K2O 4.82-4.95%, Na2O 1.32-1.55%, and B2O3 2.12-3.15%. The chemical composition of the second frit includes, in percentage by mass: SiO2 61.6-63.4%, Al2O3 12.8-13.7%, CaO 16-16.5%, MgO 1.95-2.22%, K2O 2.8-3.1%, Na2O 1.1-1.6%, and ZnO 3.75-3.95%.

[0055] The ceramic glaze of the present application comprises a base glaze, a first frit and a second frit in a certain ratio. By introducing a specially designed frit system, the performance of the glaze surface is optimized. The second frit can accurately control the critical surface tension of the glaze, so that the glaze still maintains excellent spreading and adhesion on the surface of the ceramic body with sharp edges or complex reliefs, thereby ensuring uniform coverage of the glaze layer, clear outlines and distinct details. At the same time, the first frit contained in the formula can effectively adjust the elastic modulus of the glaze layer, enhance its resistance to deformation, and significantly reduce the risk of glaze shrinking, cracking and other defects caused by mismatched body and glaze shrinkage. Therefore, the ceramic glaze of the present application can be applied to ceramic bodies with relief patterns to achieve uniform glazing without black edges, making the ceramic product relief pattern lines sharp and having a certain aesthetic appeal.

[0056] The first frit is used to adjust the elastic modulus of the glaze layer and reduce the risk of glaze shrinking caused by the difference in body and glaze shrinkage. In some embodiments, the mesh number of the first frit is 200-300. In one example, the first frit is SF frit purchased from Gongchuang Ceramics Technology Co., Ltd. It can be understood that in other embodiments, the first frit is not limited to SF frit purchased from Gongchuang Ceramics Technology Co., Ltd., but can also be purchased from other companies or synthesized by oneself, as long as it can meet the above chemical composition.

[0057] The second frit is used to control the critical surface tension of the glaze, enhance the hiding power and spreading property, and ensure uniform coverage of the glaze layer at sharp edges. In some embodiments, the mesh number of the second frit is 400-500. In one example, the second frit is 018 frit purchased from Xiamen Domag Fine Chemical Co., Ltd. It can be understood that in other embodiments, the second frit is not limited to 018 frit purchased from Xiamen Domag Fine Chemical Co., Ltd., but can also be purchased from other companies or synthesized by oneself, as long as it can meet the above chemical composition.

[0058] In some embodiments, the chemical composition of the base glaze includes, in terms of mass percentage: SiO2 66.6%-69.7%, Al2O3 13.21%-14.12%, CaO 7.58%-7.85%, MgO 0.92%-1.05%, K2O 2.73%-3%, Na2O 1.95%-2.05%, ZrO2 5.45%-5.85%, and ZnO 1.55%-1.95%.

[0059] In some embodiments, the ceramic glaze comprises, in terms of mass parts: base glaze 59-60 parts, first frit 2-2.5 parts, and second frit 38-39 parts. By further optimizing the composition of the ceramic glaze, it is beneficial to improve the glazing effect without black edges while further improving the gloss effect.

[0060] In some embodiments, the ceramic glaze further comprises: 0.5-1 parts of nanomaterials. Adding nanomaterials in the glaze is conducive to further improving the wear resistance and stain resistance of the glaze layer. Optionally, the nanomaterials include one or more of sodium molybdate, bismuth molybdate and zinc molybdate.

[0061] The second aspect of the present application provides a ceramic product, comprising: a ceramic body and a glaze layer arranged on the surface of the ceramic body, the surface of the ceramic body having a relief pattern, and the glaze layer being prepared by the ceramic glaze of the first aspect.

[0062] In some embodiments, the thickness of the glaze layer is 0.4-0.5 mm. The thickness of the glaze layer in the above range has good glazing effect and covering effect, so that the ceramic product does not show black edges. It can be understood that showing black edges, also known as showing body, refers to that the color of the body is exposed in the area that should be covered by the glaze layer, i.e., the color of the body is exposed due to the lack or thinness of the glaze layer.

[0063] In some embodiments, the glossiness of the glaze layer is ≥71GU. For example, the glossiness of the glaze layer can be, but is not limited to, 71GU, 72GU, 74GU, 75GU, 76GU, 77GU, 78GU, 79GU, 80GU, 81GU, 82GU or a range formed by any two of these values. Optionally, the glossiness of the glaze layer is ≥75GU. In some embodiments, the glossiness of the glaze layer is 75GU-82GU.

[0064] In some embodiments, the ceramic product is sanitary ceramics. The sanitary ceramics can be, but are not limited to, washbasins and the like. It can be understood that in other embodiments, the ceramic product is not limited to sanitary ceramics, but can also be other ceramic products that require high decoration precision.

[0065] The third aspect of the present application provides a preparation method of a ceramic product, comprising the following steps:

[0066] applying the ceramic glaze on the surface of the ceramic body, and firing to obtain the ceramic product;

[0067] The surface of the ceramic body has a relief pattern, and the glaze layer is prepared by the ceramic glaze of the first aspect.

[0068] By using the ceramic glaze with certain composition and ratio, excellent glazing can be achieved at the sharp parts of the relief pattern, ensuring clear pattern lines, and in addition, the glaze has appropriate glossiness, enhancing the performance of the glaze surface.

[0069] In some embodiments, the step of applying the ceramic glaze on the surface of the ceramic body comprises:

[0070] mixing the ceramic glaze with water and ball milling to obtain a slurry;

[0071] The slurry is sprayed on the surface of the ceramic body, and the wet film thickness after spraying is 0.5mm-0.7mm, and then dried.

[0072] By making the wet film thickness after spraying 0.5mm-0.7mm, it is beneficial to obtain a suitable glaze layer thickness after firing. It can be understood that the wet film refers to the film thickness after spraying, which is different from the glaze layer thickness in the finally obtained ceramic product, and the glaze layer thickness refers to the thickness obtained after drying and firing the wet film.

[0073] In some embodiments, in the step of mixing the ceramic glaze with water and ball milling, the mass ratio of the ceramic glaze, water and ball mill is 1:2:1.

[0074] In some embodiments, before the step of spraying the slurry on the surface of the ceramic body, it further comprises the steps of iron removal sieving and aging of the slurry. Specifically, the iron removal sieving has a mesh size of 180 mesh. The aging time is 10h-24h by iron removal sieving. By mixing and aging, the quality of the same batch of slurry can be ensured to be more stable.

[0075] In some embodiments, in the step of firing, the firing peak temperature is 1210℃-1280℃, and the holding time at the peak temperature is 0.5h-1.5h. Further, the firing cycle is 16h. Specifically, the sintering cycle refers to the entire cycle time from heating to holding and then cooling down, which covers the entire heat treatment time that the ceramic product experiences in the kiln, including three main stages: (1) heating stage: from room temperature to the firing peak temperature (i.e. the temperature at which the glaze matures). (2) holding stage: holding at the firing peak temperature for a period of time to allow the body and the glaze to undergo sufficient physical and chemical reactions to achieve uniformity and maturity. (3) cooling stage: from the firing peak temperature to room temperature.

[0076] In some embodiments, in the step of firing, it is carried out in an oxidizing atmosphere.

[0077] In some embodiments, the ceramic body is prepared by the injection molding process.

[0078] Specifically, the ceramic body is prepared by the following steps:

[0079] The ceramic body slurry is injected into the mold to form a wet body, and the mold has stripes corresponding to the relief pattern inside, and the size of the stripes inside the mold is obtained according to the size of the relief pattern and the shrinkage rate of the ceramic body slurry during molding;

[0080] The wet body is dried to prepare the ceramic body.

[0081] In some embodiments, the mold has a plurality of first stripes extending in a first direction and a plurality of second stripes extending in a second direction, the first direction and the second direction intersect, and the second stripes have a depth greater than that of the first stripes.

[0082] Specifically, the first direction and the second direction are perpendicular to each other. In one example, the first direction is a horizontal direction, and the second direction is a vertical direction.

[0083] Specifically, the shrinkage of the ceramic body slurry when formed is 5% to 6%, the depth of each first stripe is 3 mm to 5 mm, the depth of the second stripe is 0.2 mm to 0.4 mm greater than that of the first stripe, and the distance between adjacent two first stripes and adjacent two second stripes is independently 1 mm to 3 mm.

[0084] Through the above arrangement, the mold is matched with the shrinkage and fluidity of the ceramic body slurry when the slurry is formed, the pattern definition of the ceramic body is improved, and the defect rate is reduced.

[0085] Specifically, the mold is prepared by CNC machining. Specifically, the precision of CNC machining is controlled within 1 mm.

[0086] Specifically, in the step of preparing the mold by CNC machining, the machining depth in the horizontal direction is 3 mm to 5 mm, the machining depth in the vertical direction is 0.2 mm to 0.4 mm greater than that in the horizontal direction, and the distance between adjacent stripes is 1 mm to 3 mm. Through the above arrangement, a mold with a certain pattern is obtained to match the shrinkage and fluidity of the ceramic body slurry when the slurry is formed, improve the pattern definition of the ceramic body, and reduce the defect rate.

[0087] In some embodiments, the mold is a gypsum mold.

[0088] In some embodiments, the standing forming time is 75 min to 85 min.

[0089] In some embodiments, in the step of drying the wet body, the temperature is 50°C to 65°C, and the time is 24 h to 48 h. After drying, the body is simply washed to the relief pattern, and the body is slightly watered.

[0090] By using a CNC machine tool to precisely machine the mold to generate a high-precision relief pattern, and then combining the ceramic body with the mold by using a slurry forming process, the pattern is formed once.

[0091] In some embodiments, referring to Figure 1 , the method for preparing a ceramic product comprises the following steps:

[0092] Step S110: using a CNC machine tool to process the mold, so that the mold has a plurality of first stripes extending along a first direction and a plurality of second stripes extending along a second direction, the depth of each first stripe is 3mm-5mm, the depth of the second stripe is 0.2mm-0.4mm deeper than the depth of the first stripe, the pitch of the adjacent two first stripes and the adjacent two second stripes is independently 1mm-3mm, and the first direction and the second direction are perpendicular to each other;

[0093] Step S120: injecting the ceramic body slurry into the mold for static forming, demolding, and obtaining a wet body;

[0094] Step S130: drying the wet body to prepare a ceramic body;

[0095] Step S140: mixing and ball-milling the ceramic glaze and water to obtain a glaze slurry;

[0096] Step S150: spraying the glaze slurry on the surface of the ceramic body, so that the wet film thickness after spraying is 0.5mm-0.7mm, and drying;

[0097] Step S160: performing sintering in an oxidizing atmosphere, the sintering peak temperature is 1210℃-1280℃, the holding time at the sintering peak temperature is 0.5h-1.5h, and a ceramic product is obtained.

[0098] In order to make the purpose and advantages of the present application more clear, the ceramic glaze and its effects of the present application will be further described in detail in combination with specific examples. It should be understood that the specific examples described herein are only used to explain the present application and should not be used to limit the present application. The following examples do not include other components except for unavoidable impurities, unless otherwise specified. In the examples, the drugs and instruments are selected according to the conventional selection in the art, unless otherwise specified. The experimental methods in the examples are implemented according to the conventional conditions, such as the conditions described in the literature, books or the methods recommended by the manufacturers.

[0099] The first frit used in the following examples and comparative examples is SF frit purchased from Gongchuang Ceramic Technology Co., Ltd., and the second frit is 018 frit purchased from Xiamen Domag Fine Chemical Co., Ltd.

[0100] Example 1

[0101] The embodiment provides a ceramic glaze, which comprises, in parts by mass, 61 parts of a base glaze, 1 part of a first frit and 38 parts of a second frit. The chemical composition of the base glaze is as follows in percentage by mass: SiO2 66.6%, Al2O3 13.21%, CaO 7.58%, MgO 0.92%, K2O 2.73%, Na2O 1.95%, ZrO2 5.45% and ZnO 1.56%. The chemical composition of the first frit is as follows: SiO2 66.93%, Al2O3 9.22%, CaO 13.05%, MgO 1.15%, K2O 4.95%, Na2O 1.55% and B2O3 3.15%. The chemical composition of the second frit is as follows in percentage by mass: SiO2 61.6%, Al2O3 12.8%, CaO 16%, MgO 1.95%, K2O 2.8%, Na2O 1.1% and ZnO 3.75%.

[0102] Embodiments 2-4

[0103] Embodiments 2-4 respectively provide a ceramic glaze, which is similar to the ceramic glaze of embodiment 1, and the difference lies in that the proportion of each component in the ceramic glaze is different. Specifically, as shown in Table 1.

[0104] Comparative example 1

[0105] Comparative example 1 provides a ceramic glaze, which is similar to the ceramic glaze of embodiment 1, and the difference lies in that the second frit is not contained in the ceramic glaze, and the proportion of each component is different. Specifically, as shown in Table 1.

[0106] Comparative example 2

[0107] Comparative example 2 provides a ceramic glaze, which is similar to the ceramic glaze of embodiment 1, and the difference lies in that the first frit is not contained in the ceramic glaze, and the proportion of each component is different. Specifically, as shown in Table 1.

[0108] Comparative example 3

[0109] Comparative example 3 provides a ceramic glaze, which is similar to the ceramic glaze of embodiment 1, and the difference lies in that the ceramic glaze only contains the base glaze, and does not contain the second frit and the first frit. Specifically, as shown in Table 1.

[0110] Comparative example 4

[0111] Comparative example 4 provides a ceramic glaze, which is the same as the ceramic glaze of embodiment 1, and the difference lies in that the first frit in embodiment 1 is replaced by B20 boron-containing frit of Foshan Aoxin Glaze Co., Ltd. Specifically, the chemical composition of the B20 boron-containing frit is as follows in percentage by mass: SiO2 61%, Al2O3 8%, Na2O 4% and B2O3 27%.

[0112] Comparative Example 5

[0113] Comparative Example 5 provides a ceramic glaze, which is the same as the ceramic glaze of Example 1, except that the second frit in Example 1 is replaced by Zhuangxin Ceramic Raw Material Co., Ltd. 809 frit. Specifically, the chemical composition of the 809 frit is as follows in terms of mass percentage: SiO264.13%, Al2O3 12.56%, CaO 9.78%, MgO 1.53%, K2O 3.1%, Na2O 2.5%, and ZnO 6.4%.

[0114] Comparative Example 6

[0115] Comparative Example 6 provides a ceramic glaze, which is similar to the ceramic glaze of Example 1, except that the proportions of the components in the ceramic glaze are different. Specifically, as shown in Table 1.

[0116] Table 1

[0117]

[0118] The ceramic glazes of the above examples and comparative examples are mixed with water and ball milling sub according to the mass ratio of 1:2:1 to obtain ceramic slurry, which is sieved through a 180 mesh sieve and aged for 18 hours. Then, the above ceramic slurry is applied to the surface of the body by spraying, the glaze thickness of the white body is controlled to be 0.5-0.7mm, and dried. The ceramic product is obtained by firing in an oxidizing atmosphere in a tunnel kiln at a firing peak temperature of 1250°C, a firing period of 16 hours, and a holding time of 1 hour.

[0119] The gloss of the glaze layer of the prepared ceramic product of the above examples and comparative examples is detected by a gloss meter, and the results are shown in Table 2. The thickness of the glaze layer of the prepared ceramic product of the above examples and comparative examples is detected by an HV-CAM microscope, which characterizes the glaze hanging effect.

[0120] Figure 2 It is a physical map of the ceramic body used in the examples and comparative examples. As can be seen from the figure, the ceramic body has a relief pattern, and the line profile is clear and the details are distinct. Figure 3 It is a glaze thickness measurement result map of the ceramic product prepared in Example 2. As can be seen from the figure, the relief glaze thickness reaches 0.422mm. Figure 4 It is a schematic diagram of the appearance of the ceramic product prepared in Example 2. As can be seen from the figure, the ceramic product prepared in Example 2 has uniform glaze thickness, excellent glaze hanging performance, and sharp lines with sufficient aesthetic feeling. Figure 5The appearance of the ceramic product prepared in Example 1 is shown in the figure. As can be seen from the figure, the ceramic product prepared in Example 1 has a color of the body, a black edge, and the profile of the relief pattern of the ceramic product is not clear, the lines are not distinct, and the relief effect is not obvious. Figure 6 The glaze layer thickness measurement result of the ceramic product prepared in Comparative Example 1 is shown in the figure. As can be seen from the figure, the glaze layer thickness is 0.166 mm.

[0121] The experimental data of each example and comparative example are shown in Table 2.

[0122] Table 2

[0123]

[0124] As can be seen from the above Table 1, the addition of a certain amount of the first frit and the second frit in the ceramic glaze of the embodiments of the present application is beneficial to improve the glaze hanging thickness, so that the ceramic product does not have a black edge, and has good gloss. The ceramic glaze of Comparative Example 1 and Comparative Example 3 does not contain the second frit, and the glaze hanging thickness is insufficient, so that the ceramic product has a black edge. The ceramic glaze of Comparative Example 2 does not contain the first frit, although the glaze hanging thickness is good and does not have a black edge, but the gloss is obviously poor, and the glaze layer has defects such as shrinkage and cracks. In the ceramic glaze of Comparative Example 4, the first frit is replaced by B20 frit, and the prepared ceramic product has low gloss, insufficient glaze hanging thickness, so that the ceramic product has a black edge, and has defects such as overfiring. In the ceramic glaze of Comparative Example 5, the second frit is replaced by 809 frit, and the glaze hanging thickness is insufficient, so that the ceramic product has a black edge, and has cracks. In the ceramic glaze of Comparative Example 6, the amount of the first frit is too large, although it does not have a black edge, but the gloss is obviously poor, and the glaze layer has defects such as overfiring.

[0125] Further, by further optimizing the ratio of the ceramic glaze, it is beneficial to improve the glaze hanging effect, not to have a black edge, and further improve the gloss effect.

[0126] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0127] The above-described embodiments only express several implementation manners of the present application, facilitate specific and detailed understanding of the technical solutions of the present application, but cannot be understood as a limitation on the patent protection scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. It should be understood that, on the basis of the technical solutions provided by the present application, the technical solutions obtained by logical analysis, reasoning or limited experiments by the skilled person in the art all belong to the protection scope of the appended claims of the present application. Therefore, the patent protection scope of the present application should be subject to the content of the appended claims, and the description and drawings can be used to explain the content of the claims.

Claims

1. A ceramic glaze, characterized by, The ceramic glaze includes, in mass parts: base glaze 57.5-61 parts, first frit 1-2.5 parts, and second frit 38-40 parts. The chemical composition of the first frit includes, in mass percentage: SiO2 63.11%-68%, Al2O3 8.32%-9.22%, CaO 12.58%-13.05%, MgO 1.01%-1.15%, K2O 4.82%-4.95%, Na2O 1.32%-1.55%, and B2O3 2.12%-3.15%. The chemical composition of the second frit includes, in mass percentage: SiO2 61.6%-63.4%, Al2O3 12.8%-13.7%, CaO 16%-16.5%, MgO 1.95%-2.22%, K2O 2.8%-3.1%, Na2O 1.1%-1.6%, and ZnO 3.75%-3.95%.

2. The ceramic glaze according to claim 1, characterized in that, The chemical composition of the base glaze includes, in mass percentage: SiO2 66.6%-69.7%, Al2O3 13.21%-14.12%, CaO 7.58%-7.85%, MgO 0.92%-1.05%, K2O 2.73%-3%, Na2O 1.95%-2.05%, ZrO2 5.45%-5.85%, and ZnO 1.55%-1.95%.

3. The ceramic frit according to claim 1 or 2, characterized in that, The ceramic glaze includes, in mass parts: base glaze 59-60 parts, first frit 2-2.5 parts, and second frit 38-39 parts; and / or, The ceramic glaze further includes: nano material 0.5-1 part; optionally, the nano material includes one or more of sodium molybdate, bismuth molybdate, and zinc molybdate.

4. A ceramic article, characterized by, The ceramic glaze includes: A ceramic body and a glaze layer disposed on the surface of the ceramic body, the surface of the ceramic body having a relief pattern, the glaze layer being prepared by the ceramic glaze of any one of claims 1-3.

5. The ceramic article of claim 4, wherein, The thickness of the glaze layer is 0.4-0.5 mm; and / or, The ceramic product includes a sanitary ceramic product.

6. A method of making a ceramic article, characterized by, The method includes the following steps: Applying the ceramic glaze to the surface of a ceramic body, firing to obtain a ceramic product; The surface of the ceramic body has a relief pattern, and the ceramic glaze is the ceramic glaze of any one of claims 1-3.

7. The method of making a ceramic article according to claim 6, wherein, The step of applying the ceramic glaze to the surface of the ceramic body includes: Mixing and ball-milling the ceramic glaze with water to obtain a glaze slurry; Spraying the glaze slurry on the surface of the ceramic body, so that the wet film thickness after spraying is 0.5-0.7 mm, and drying.

8. The method of making a ceramic article according to claim 6, wherein, In the step of firing, the firing peak temperature is 1210-1280°C, and the holding time at the firing peak temperature is 0.5-1.5 h.

9. The method of making a ceramic article according to any one of claims 6 to 8, wherein, The ceramic body is prepared by a slip casting process; Optionally, the ceramic body is prepared by the following steps: Injecting a ceramic body slurry into a mold to be stationary formed, demolding to obtain a wet body, the mold has a stripe corresponding to the relief pattern inside, the size of the stripe inside the mold is obtained according to the size of the relief pattern and the shrinkage rate of the ceramic body slurry when forming; Drying the wet body to prepare the ceramic body.

10. The method of making a ceramic article according to claim 9, wherein, The mold has a plurality of first stripes extending along a first direction and a plurality of second stripes extending along a second direction, the first direction and the second direction intersect, the depth of the second stripe is deeper than that of the first stripe; Optionally, the first direction and the second direction are perpendicular to each other; Optionally, the shrinkage rate of the ceramic body slurry when forming is 5%-6%, the depth of each first stripe is 3mm-5mm, the depth of the second stripe is 0.2mm-0.4mm deeper than that of the first stripe, and the distance between adjacent two first stripes and adjacent two second stripes is independently 1mm-3mm.

11. The method of making a ceramic article according to claim 9, wherein, The mold is prepared by CNC machining; optionally, the CNC machining precision is within 1mm; and / or, The mold is a gypsum mold; and / or, The stationary forming time is 75min-85min; and / or, In the step of drying the wet body, the temperature is 50℃-65℃, and the time is 24h-48h.

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