阅读说明：本技术 一种具有夜空星河装饰效果的陶瓷砖 (Ceramic tile with night sky and river decoration effect ) 是由 梁桐灿 曾凡平 丁英美 梁耀龙 宋树刚 冯勇 刘海光 蔡三良 于 2021-08-12 设计创作，主要内容包括：本申请提出一种具有夜空星河装饰效果的陶瓷砖,由下至上包括黑色坯体层、乳浊黑釉层、黑色透明釉层和闪光釉层；形成闪光釉层的闪光釉中包括金砂干粒；金砂干粒组分包括：赤铁矿晶型的三氧化二铁和方石英晶型的氧化硅；闪光釉中还包括黑色透明釉,黑色透明釉以化学氧化物百分比为计,至少包含45～55％SiO-(2)、9～12％Al-(2)O-(3)、8～13.5％Fe-(2)O-(3)、11～13％CaO、5～8％BaO、3～7％Na-(2)O、1～3％MgO、0.5～1％K-(2)O和0.1～1％TiO-(2)。本发明通过在高透明和高光泽度的前提下提高釉面折光率和减小釉料的高温粘度使金砂干粒有更好的闪光效果。(The application provides a ceramic tile with a night sky-river decoration effect, which comprises a black body layer, an opaque black glaze layer, a black transparent glaze layer and a flashing glaze layer from bottom to top; the flash glaze forming the flash glaze layer comprises gold sand dry particles; the gold sand dry particle comprises the following components: ferric oxide in the hematite crystal form and silicon oxide in the cristobalite crystal form; the flash glaze also comprises a black transparent glaze, and the black transparent glaze at least comprises 45-55% of SiO in percentage by chemical oxide 2 、9～12％Al 2 O 3 、8～13.5％Fe 2 O 3 、11～13％CaO、5～8％BaO、3～7％Na 2 O、1～3％MgO、0.5～1％K 2 O and 0.1-1% TiO 2 . The invention improves the refractive index of the glaze surface and reduces the high-temperature viscosity of the glaze material on the premise of high transparency and high glossiness, so that the gold sand dry grains have better flashing effect.)

1. A ceramic tile with the night sky-river decoration effect is characterized by comprising a black body layer, an opaque black glaze layer, a black transparent glaze layer and a flashing glaze layer from bottom to top;

the flash glaze for forming the flash glaze layer comprises gold sand dry particles; the gold sand dry particle comprises the following components: ferric oxide in the hematite crystal form and silicon oxide in the cristobalite crystal form;

the flash of lightThe glaze also comprises a black transparent glaze, and the black transparent glaze at least comprises 45-55% of SiO in percentage by mass of chemical oxides₂、9～12％Al₂O₃、8～13.5％Fe₂O₃、11～13％CaO、5～8％BaO、3～7％Na₂O、1～3％MgO、0.5～1％K₂O and 0.1-1% TiO₂。

2. The ceramic tile with the night sky-river decoration effect as claimed in claim 1, wherein the black transparent glaze material further comprises boron frit.

3. The ceramic tile with the night sky-river decoration effect of claim 1, wherein the iron oxide is introduced by black pigment iron red, and the main component of the iron red is hematite crystal type ferric oxide.

4. The ceramic tile with the night sky-river decoration effect as claimed in claim 3, wherein the content of iron oxide red in the black transparent glaze raw material is 10-15% by mass.

5. The ceramic tile with the night sky-river decoration effect as claimed in claims 1-4, wherein the black transparent glaze comprises the following raw materials in parts by weight: potassium feldspar powder: 40-50 parts of calcite: 5-8 parts of air knife kaolin: 4-6 parts of boron frit: 20-25 parts of barium carbonate: 7-10 parts of iron oxide red: 10-15 parts.

6. A ceramic tile with night sky-river decoration as claimed in claim 1 wherein said black body layer has a chromaticity range of: the range of the L value is: 30-35, the range of the value of a is as follows: -2.0 to 2.0, b ranging from: -2.0 to 2.0.

7. The ceramic tile with the night sky-river decoration effect of claim 1 wherein the forming formsThe black body raw material composition of the black body layer at least comprises 65-72% of SiO in percentage by chemical oxide₂、13～19％Al₂O₃、2～4％Fe₂O₃、2～3％CaO、2～4％MgO、2～5％K₂O、0.3～0.7％Na₂O and 0.2-0.8% Cr₂O₃。

8. The ceramic tile with the night sky-river decoration effect as claimed in claim 8, wherein the black pigment in the black body material is a solid solution of ferric oxide and chromium oxide, and the solid solution at least contains (Fe)_0.6Cr_0.4)₂O₃。

9. The ceramic tile with the night sky-river decoration effect as claimed in claim 1,

the chromaticity range of the black body layer is: the range of the L value is: 30-35, the range of the value of a is as follows: -2.0 to 2.0, b ranging from: -2.0 to 2.0; the blank material for forming the black blank layer contains a black coloring material which is a solid solution of iron sesquioxide and chromium sesquioxide, and the solid solution contains at least (Fe)_0.6Cr_0.4)₂O₃；

The chroma range of the opaque black glaze layer is as follows: the range of the L value is: 27-30, the range of the value of a is as follows: -1.0 to 1.0, b having a value in the range: 1.0-1.0, wherein the opaque black glaze raw material forming the opaque black glaze layer forms a glaze black material, and the glaze black pigment is an iron-based glaze black pigment;

the raw materials of the black transparent glaze for forming the black transparent glaze layer comprise a black pigment iron red, and the main component of the iron red is hematite crystal type ferric oxide;

the flash glaze for forming the flash glaze layer comprises the following raw materials in percentage by mass: 94-97% of black transparent glaze and 3-6% of gold sand dry particles.

Technical Field

The application relates to the field of ceramic tiles, in particular to a ceramic tile with a night sky and starriver decoration effect.

Background

The development of the long history of China is closely related to the progress of Chinese ceramics. From ancient times to present, ceramics play an irreplaceable role in our daily life due to low water absorption, high mechanical strength and glossiness and rich decorative purposes, and are always favored by consumers and manufacturers. At present, the traditional ceramic yield of China is in the first place in the world for over ten years continuously, and with the continuous increase of the volume of the domestic ceramic industry, manufacturers are not limited to common ceramic tiles any more, but continuously improve the process and design concept according to the needs of people, and improve the brand added value. At present, indoor light becomes an important factor which cannot be ignored in modern home decoration, and the reasonable light design can effectively improve the decoration effect. Simultaneously, the decorative effect of glazed tile has also been promoted greatly in the interact between light and the glazed tile, but ordinary glazed tile is comparatively single to the reflection and the refraction direction of light, and stronger specular reflection effect has still hindered the perfect presentation of glazed pattern moreover. If the interaction between the glazed tile and indoor light can be skillfully utilized, the pen can become a good point for family decoration.

Famous poems in the Tang Dynasty write a beautiful poem of 'the day night is cool like water, and morning glory with ladies' sitting; there is also a 'sky in summer night' in the primary school textbook, the star is like a gem embedded in the blue sky, like countless small eyes watching me. And like stubborn children, play in the galaxy. "graceful character of; the musician jowar ju sings a musician tune in her song, such as 'quiet summer, starry spot in the sky'.

By utilizing a large number of optical principles such as light transmission, absorption, reflection, refraction, dispersion and the like, the vivid scene of stars in the whole day at night in summer is better presented in the ceramic tile, how to better wrap the dry gold sand grains by controlling the components of the glaze material, the flashing effect of the dry gold sand grains is enhanced, and the technical problem to be solved by the technical scheme is to achieve the decorative effect of the night sky and the river.

Disclosure of Invention

The main purpose of the application is to provide a ceramic tile with the night sky-river decoration effect, and the ceramic tile is characterized in that the refractive index of a glaze surface is improved and the high-temperature viscosity of glaze materials is reduced on the premise of high transparency and high glossiness by adjusting the formula composition of black transparent glaze, so that the dried gold sand grains have a better flashing effect.

In order to achieve the purpose, the application provides a ceramic tile with a night sky and river decoration effect.

The application provides a ceramic tile with a night sky-river decoration effect, which comprises a black body layer, an opaque black glaze layer, a black transparent glaze layer and a flashing glaze layer from bottom to top;

the flash glaze forming the flash glaze layer comprises gold sand dry particles; the gold sand dry particle comprises the following components: ferric oxide in the hematite crystal form and silicon oxide in the cristobalite crystal form;

the flash glaze also comprises a black transparent glaze, and the black transparent glaze at least comprises 45-55% of SiO in percentage by chemical oxide₂、9～12％Al₂O₃、8～13.5％Fe₂O₃、11～13％CaO、5～8％BaO、3～7％Na₂O、1～3％MgO、0.5～1％K₂O and 0.1-1% TiO₂。

The black transparent glaze needs to have larger high-temperature surface tension and smaller high-temperature viscosity, so that the gold sand dry particles can be better wrapped and tightly combined, and the gold sand dry particles with different sizes and different shapes exist in the glaze layer of the fired sample at various angles.

The calcium oxide can increase the refractive index of the glass and reduce the dispersion, which is beneficial to enhancing the flashing effect of the dry gold sand particles, and simultaneously, the calcium oxide can play a role of a flux in the glaze, so that the high-temperature viscosity of the glaze can be reduced, particularly, the reduction amplitude of the glaze viscosity can be greatly increased along with the further increase of the temperature at higher temperature, and the good combination of the glaze and the dry gold sand particles is beneficial.

Barium oxide can increase the refractive index of the glass phases in the glaze, which contributes to their gloss. Secondly, barium oxide does not increase the dispersion of the glass phase. Meanwhile, barium oxide is a good fluxing agent in the glaze, and the fluxing range of barium oxide is wider than that of calcium oxide and magnesium oxide. Generally, barium oxide can play a role in fluxing from 900 ℃, and calcium oxide and magnesium oxide can only play a role in fluxing above 1100 ℃. Meanwhile, the introduction of barium oxide can reduce the viscosity of the glaze, and is beneficial to the infiltration of the black transparent glaze on the gold sand dry particles.

By combining the action mechanisms, the content of calcium oxide CaO in the black transparent glaze needs to be controlled within the range of 11-13% and the content of barium oxide BaO needs to be controlled within the range of 5-8% in terms of chemical oxides.

Preferably, the raw material of the black transparent glaze also comprises boron frit.

BO parallel to the surface can be formed on the surface of the boron-containing glass₃Triangular plane, so that the boron oxide has the function of improving the surface gloss of the glaze. Meanwhile, as the boric oxide has strong fluxing capacity and is a glass network former, a glass phase of a multi-component system is easy to generate, which is beneficial to coloring of the coloring material, and the borate component can increase the melting amount of the coloring material and enhance the coloring effect, the raw material of the black transparent glaze preferably comprises the boron frit.

Preferably, the raw materials of the black transparent glaze also comprise a black pigment iron red, and the main component of the iron red is hematite crystal type ferric oxide.

The main components of the gold sand dry particles are ferric oxide and silicon oxide, the pigment of the opaque black glaze is an iron pigment, and all the iron pigments are preferably selected to ensure that the colors of the glaze layers are similar and the performances of the glaze layers are matched.

Preferably, the content of the iron oxide red in the raw material composition of the black transparent glaze is 10-15% by mass percent.

In the vitreous phase of ceramic glazes, the coloring mechanism of iron oxide is ionic coloring: that is, iron ions are dissolved in the glass phase to form iron-oxygen bonds (Fe-O) in the glass network structure. Because iron has the characteristic of variable valence, factors such as iron content in the glaze, firing temperature, atmosphere and the like can have obvious influence on the color generation condition of the iron red pigment in the glaze. When the iron content is less than 4%, the glaze may have light colors such as colorless, cyan and beige; when the iron content is more than 8%, the glaze mainly takes on a dark hue mainly consisting of black. In order to obtain a dark black glaze effect, the adding amount of the iron red pigment is required to be controlled to be 10-15%.

Preferably, the black transparent glaze comprises the following raw materials in parts by mass: potassium feldspar powder: 40-50 parts of calcite: 5-8 parts of air knife kaolin: 4-6 parts of boron frit: 20-25 parts of barium carbonate: 8-10 parts of iron oxide red: 10-15 parts.

By controlling the content of calcium oxide and barium oxide in the formula and introducing the boron frit and the iron red, black transparent glaze with high glossiness and high transparency can be prepared.

Preferably, the black transparent glaze comprises the following raw materials in parts by mass: 48 parts of calcite: 7 parts of air-knife kaolin: 6 parts of boron frit: 23 parts of barium carbonate: 9 parts of iron oxide red: 13 parts.

Preferably, the range of values of L for the black body layer is: 30-35, the range of the value of a is as follows: -2.0 to 2.0, b ranging from: -2.0 to 2.0.

In order to prevent the color difference between the blank and the glaze layer from damaging the whole decoration effect of the night sky and the star river of the ceramic tile, the black blank is obtained by introducing a black pigment, and the chromaticity range of the black blank is controlled within the L value range as follows: 30-35, the range of the value of a is as follows: -2.0 to 2.0, b ranging from: the effect is better within-2.0.

Preferably, the black body layer comprises 65-72% of SiO in percentage of chemical oxides₂、13～19％Al₂O₃、2～4％Fe₂O₃、2～3％CaO、2～4％MgO、2～5％K₂O、0.3～0.7％Na₂O and 0.2-0.8% Cr₂O₃。

Because a large amount of iron element is introduced by adding the colorant, the generation temperature of eutectic is easily reduced and the expansion coefficient is easily increased in the blank, so that the high-temperature viscosity of the blank is reduced and the deformation resistance of the blank at high temperature is poor. The magnesium oxide can form magnesium silicate phases with low expansion coefficients such as enstatite and cordierite in the green body. Meanwhile, the strong fluxing action of the magnesium oxide is also beneficial to the melting of quartz and cristobalite with high expansion coefficient in the blank, and the thermal expansion coefficient of the quartz glass formed by melting the phases is very low and is only 0.5 multiplied by 10 < -6 >/DEG C. In addition, because of small radius, more charge and strong polarization capability of magnesium ions, the glass phase formed by the magnesium oxide fluxing has higher compressive strength and hardness.

The calcium oxide in the green body is beneficial to the formation of a low-viscosity glass phase, which is not only beneficial to the sintering of the ceramic green body which mainly adopts a viscous flow mechanism and a diffusion mechanism, but also beneficial to the mass transfer behavior between the black material in the green body and the black material in the glaze, and is beneficial to reducing the color difference of the green glaze of the black decorative ceramic tile and improving the color uniformity.

The mechanical strength of the ceramic body containing the sodium oxide glass phase is inferior to that of the ceramic body containing the calcium oxide and magnesium oxide glass phases, namely the compressive strength, the tensile strength, the elasticity and the hardness, which are caused by the fact that in the sodium oxide and potassium oxide glass structure, the Na-O bond is strong and the Ca-O, Mg-O bond is low. For the same reason, the thermal expansion coefficient of the sodium-containing glass phase is obviously greater than that of the magnesium/calcium-containing glass phase, so that under the condition of higher iron content in the blank, the content of sodium oxide in the formula needs to be reduced, which is beneficial to ensuring the deformation resistance of the blank.

Therefore, in order to ensure that the introduced pigment cannot reduce the mechanical properties of the green body, the content of MgO in the green body formula needs to be controlled within the range of 2-4%, the content of CaO in the range of 2-3%, and Na in the green body formula₂The content range of O is 0.3-0.7%.

Preferably, the black pigment is a solid solution of ferric oxide and chromium oxide, and the solid solution contains at least (Fe)_0.6Cr_0.4)₂O₃。

Contains (Fe)_0.6Cr_0.4)₂O₃The color mechanism of the solid solution pigment of ferric oxide and chromic oxide is that iron absorbs green color tone in visible light and reflects red color tone, chromium component absorbs red color tone and reflects green color tone, and the blank black pigment can make the blank body present excellent black tone according to the complementary color mixing principle of visible light; in addition, the main component of the gold sand dry particles is hematite crystal form ferric oxide, and in order to make the color of the blank glaze similar and the performance matched, an iron-based black pigment is also required to be introduced, and the content of (Fe) is comprehensively analyzed_0.6Cr_0.4)₂O₃The solid solution color of the ferric oxide and the chromic oxide is optimal.

Preferably, the chromaticity range of the black body layer is: the range of the L value is: 30-35, the range of the value of a is as follows: -2.0 to 2.0, b ranging from: -2.0 to 2.0; the blank material for forming the black blank layer comprises a black coloring material which is a solid solution of ferric oxide and chromium oxide, and the solid solution at least contains (Fe)_0.6Cr_0.4)₂O₃。

The chroma range of the opaque black glaze layer is as follows: the range of the L value is: 27-30, the range of the value of a is as follows: -1.0 to 1.0, b having a value in the range: 1.0-1.0, wherein the opaque black glaze raw material forming the opaque black glaze layer forms a glaze black material, and the glaze black pigment is an iron-based glaze black pigment;

the raw materials of the black transparent glaze for forming the black transparent glaze layer comprise a black pigment iron red, and the main component of the iron red is hematite crystal type ferric oxide;

the flash glaze for forming the flash glaze layer comprises the following raw materials in parts by mass: 94-97% of black transparent glaze and 3-6% of gold sand dry particles.

In order to prevent the color difference between the blank and the glaze layer from damaging the whole decoration effect of the night sky and the star river of the ceramic tile, a black blank is obtained by introducing a black pigment, and the chromaticity range of the black blank layer is as follows: the range of the L value is: 30-35, the range of the value of a is as follows: -2.0 to 2.0, b ranging from: -2.0 to 2.0; the introduced pigment can not reduce the mechanical property of the blank, and the iron-based black pigment needs to be introduced to carry out analysis to contain (Fe) because the colors of the blank glaze are similar and the properties are matched_0.6Cr_0.4)₂O₃The solid solution color of the ferric oxide and the chromic oxide is optimal.

In order to highlight the glittering effect of the gold sand particles to the maximum extent, the ground glaze needs to obtain the color characteristic similar to deep space black, and the chromaticity range of the opaque black glaze layer is controlled as follows: the range of the L value is: 27-30, the range of the value of a is as follows: -1.0 to 1.0, b having a value in the range: -1.0 to 1.0; in order to make the color of the blank glaze body glaze similar and the performance matching, the opaque black glaze raw material forming the opaque black glaze layer forms a glaze black material, and the glaze black pigment is an iron-based glaze black pigment.

In order to obtain the stereoscopic impression of the flash particles and the layering of the overall decoration effect of the sky river to the maximum extent, a black transparent glaze layer needs to be arranged, in order to enable the colors of the glaze layers to be similar and the performances to be matched, the black transparent glaze raw material components for forming the black transparent glaze layer comprise a black pigment iron red, and the main component of the iron red is hematite crystal form ferric oxide.

The flash glaze is prepared by mixing gold sand dry particles and transparent black polished glaze serving as main raw materials and CMC serving as an additional binder. The proportion of the gold sand dry particles serving as the core of the flashing function is particularly important, when the content of the gold sand dry particles is low, the flashing effect of the glaze is weak, the glaze is pure dark black, when the addition amount of the gold sand dry particles is 3-6%, the glaze presents excellent flashing effect, and the black color of the glaze is weakened; however, when the addition amount of the gold sand dry particles is more, the glaze surface shows faint brown color tone and no longer shows pure black color tone, so the 'flash' effect also shows a reduced trend. Mainly due to Fe³⁺/Fe²⁺Due to the fact that the adding amount of the iron red pigment in the black transparent glaze is fixed, the gold sand dry particles are melted in the firing process, and part of the 3-valent iron ions are dissolved in the gold sand glaze A, so that the content range of the gold sand dry particles in the raw materials of the flash glaze is as follows by mass percent: 3% -6% is the best.

In order to expose the surface type capable of reflecting/refracting light rays to the maximum extent in the flash glaze, the optimal addition amount of the gold sand dry particles in the flash glaze is 3-6%, and in order to enable the colors of the glaze layers to be similar and the performances to be matched, the base glaze material of the flash glaze is black transparent glaze which is used for forming the black transparent glaze layer.

To sum up, the following beneficial effects of this application technical scheme:

the invention provides a ceramic tile with the night sky-river decoration effect, which improves the refractive index of a glaze surface and reduces the high-temperature viscosity of glaze materials on the premise of high transparency and high glossiness by adjusting the formula composition of black transparent glaze, so that dried gold sand grains have better flashing effect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other related drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is an XRD diffraction pattern of a red iron oxide pigment for black transparent glaze in the examples of the present application.

FIG. 2 is an XRD diffraction pattern of the dried gold sand grains in the example of the present application.

FIG. 3 is a schematic view of the construction of the ceramic tiles of the present application.

FIG. 4 is a diagram of the optical effect mechanism of the ceramic tile with starry sky decoration effect according to the present application.

FIG. 5 is an electron microscope microstructure photograph of a cross section of a ceramic tile of example 1 of the present application.

In the figure, 31 black body layer, 32 opaque black glaze layer, 33 black transparent glaze layer, 34 flash glaze layer, a incident light, B glaze reflected light, C dry particle reflected light, D dry particle scattered light, E reflected light, 41 gold sand dry particle, 51 body layer, 52 opaque black glaze layer, 53 black transparent glaze layer and 54 flash glaze layer.

The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

The XRD diffraction pattern of the iron red for the black transparent glaze is shown in figure 1, and the chemical composition of the iron red is shown in the following table:

the XRD diffraction pattern of the gold sand dry particles is shown in figure 2, and the chemical composition is shown in the following table:

the chemical composition of the partial billet feedstock is shown in the following table:

the chemical composition of the raw materials for partial glaze is shown in the following table:

the application provides a pottery brick of night sky river decorative effect, by lower supreme black body layer, opal black glaze layer, black transparent glaze layer and the glaze layer that flashes, wherein:

the black body layer is formed by using a black body raw material which at least comprises 65-72% of SiO in percentage of chemical oxides₂、13～19％Al₂O₃、2～4％Fe₂O₃、2～3％CaO、2～4％MgO、2～5％K₂O、0.3～0.7％Na₂O and 0.2-0.8% Cr₂O₃。

The blank comprises the following components in parts by mass: potassium-sodium stone powder: 22-26 parts of potassium stone powder: 12-14 parts of medium aluminum sand: 20-26 parts of gray black mud: 19-23 parts of a stone powder: 14-18 parts of wollastonite particles: 3-5 parts of a blank black pigment: 2-4 parts.

The opaque black glaze layer comprises the following components in parts by weight: calcining alumina: 9-12 parts of air-knife kaolin: 10-12 parts of wollastonite powder: 2-4 parts of calcined zinc oxide: 2.5-4 parts of potassium feldspar powder: 22-25 parts of nepheline powder: 12-15 parts of quartz powder: 18-20 parts of zirconium silicate: 13-15 parts of glaze black pigment and 3-5 parts of glaze black pigment.

The black transparent glaze layer comprises the following components in percentage by chemical oxide: 45-55% SiO₂、9-12％Al₂O₃、8-13.5％Fe₂O₃、11-13％CaO、5-8％BaO、3-7％Na₂O、1-3％MgO、0.5-1％K₂O and 0.1-1% TiO₂。

The formula comprises the following components in parts by mass: potassium feldspar powder: 40-50 parts of calcite: 5-8 parts of air knife kaolin: 4-6 parts of boron frit: 20-25 parts of barium carbonate: 7-10 parts of iron oxide red: 10-15 parts.

The flash glaze layer comprises the following components in percentage by mass: 3 to 6 percent of gold sand dry particles, 94 to 97 percent of black transparent glaze and 3 to 6 percent of CMC adhesive.

FIG. 4 is an optical effect mechanism diagram of the ceramic tile with night sky-river decoration effect, when light A irradiates on a dark black glaze (flash glaze) with light transmittance of the ceramic tile with dry gold sand grains, most of the light is absorbed by the pure black glaze, and the night sky effect is achieved; a part of light B is subjected to mirror reflection on the glaze; part of light C directly irradiates on the gold sand dry particles to be reflected, and the light directly reflected into human eyes is stronger than the light in other areas because the gold sand dry particles are in irregular shapes; a part of light D is refracted and scattered for many times in the gold sand dry particles, so that the light intensity is obviously reduced, and a dark light area is formed; a part of the light E is transmitted through the glaze and irradiated on the iron oxide crystals at the joint of the blank glaze to generate reflection, but the part of the light is very weak. The four main light transmission mechanisms realize multi-level, multi-angle and multi-color flashing effects, and the decorative effect of the night sky, the starry river is realized by combining the high glossiness and the high transparency of the glaze.

Product performance detection method

The chroma detection method comprises the following steps: and detecting by using a colorimeter to obtain the chromaticity of the required part of the product, wherein the chromaticity is expressed as an L value, an a value and a b value.

The night sky river has the following decorative effect: the product is observed by naked eyes to comprehensively evaluate the glossiness of the glaze, the color development condition of the glaze, the flash intensity, the flash effect and the like, and the decorative effect of the night sky and the sky river is divided into 5 grades from low to high in the embodiment and marked by 1, 2, 3, 4 and 5.

Phase testing: qualitative analysis was carried out with a diffractometer of the D8-Advanced type.

And (3) testing the structure: the microstructure and element distribution were analyzed by JSM-6700F scanning electron microscope.

And (3) component analysis: the composition was analyzed by XRF-1800 wavelength dispersive X-ray fluorescence spectroscopy.

Modulus of rupture: and detecting by using a modulus of rupture instrument.

The evaluation mode of the blank glaze and the bonding performance between the glaze and the glaze comprises the following steps: and analyzing the microstructure of the product by using a JSM-6700F type scanning electron microscope, and marking the evaluation result as four grades of A, A +, A + + and A + + + from meeting the product requirement to very good for comparison.

The formulation compositions in the above examples are within the range, including the endpoints and any values within the range, which are practical, and some of the examples are described below as specific point values, and all examples herein are consistent in process parameters, implementation conditions and implementation steps.

Example 1

A ceramic tile with night sky-river decoration effect comprises a black body layer, an opaque black glaze layer, a black transparent glaze layer and a flashing glaze layer from bottom to top,

the black body layer comprises the following components in parts by weight: potassium-sodium stone powder: 22 parts of potassium stone powder: 13 parts of medium alumina sand: 23 parts of gray black mud: 20 parts of a stone powder: 16 parts of wollastonite particles: 3 parts of blank black material: and 3 parts.

Wherein the color value of the blank detected by a colorimeter is as follows: l: 32.5, a: 1.35, b: 0.25.

wherein, the content of CaO is: 2.1 percent, and the content of MgO is as follows: 2.2% of Na₂The content of O is: 0.35 percent.

The opaque black glaze layer comprises the following components in parts by weight: calcining alumina: 10 parts, air knife kaolin: 11 parts of wollastonite powder: 3 parts of calcined zinc oxide: 3 parts of potassium feldspar powder: 23 parts of nepheline powder: 13 parts of quartz powder: 20 parts of zirconium silicate: 13 parts of glaze black material and 4 parts of glaze black material.

Wherein, the color value of the opacified black glaze detected by a colorimeter is as follows: l: 28.5, a: -0.35, b: 0.55.

the black transparent glaze layer comprises the following components in parts by mass: potassium feldspar powder: 44 parts of calcite: 7 parts of air-knife kaolin: 5 parts of boron frit: 22 parts of barium carbonate: 9 parts of iron oxide red: 13 parts.

Wherein, the content of calcium oxide is as follows: 12.5%, the content of barium oxide is: 7.2 percent.

The flash glaze layer comprises the following components in percentage by mass: 5% of gold sand dry particles, 95% of black transparent glaze and 5% of CMC adhesive.

Example 2

Example 2 differs from example 1 in the formulation composition of the black clear glaze.

The black transparent glaze layer comprises the following components in parts by mass: potassium feldspar powder: 49 parts and calcite: 5.5 parts of air-knife kaolin: 5.5 parts of boron frit: 20 parts of barium carbonate: 10 parts of iron oxide red: 10 parts.

Wherein, the content of calcium oxide is as follows: 11.2%, the content of barium oxide is: 8.1 percent.

Example 3

Example 3 differs from example 1 in the formulation composition of the black clear glaze.

The black transparent glaze layer comprises the following components in parts by mass: potassium feldspar powder: 42 parts of calcite: 7.5 parts of air-knife kaolin: 4.5 parts of boron frit: 23 parts of barium carbonate: 8 parts of iron oxide red: 15 parts.

Wherein, the content of calcium oxide is as follows: 13.5%, the content of barium oxide is: 6.5 percent.

Example 4

Example 4 differs from example 1 in the formulation composition of the black clear glaze.

The black transparent glaze layer comprises the following components in parts by mass: potassium feldspar powder: 44 parts of calcite: 8 parts of air-knife kaolin: 4 parts of boron frit: 25 parts of barium carbonate: 7 parts of iron oxide red: 12 parts.

Wherein, the content of calcium oxide is as follows: 13.9%, the content of barium oxide is: 5.2 percent.

Example 5

Example 5 differs from example 1 in the formulation composition of the black clear glaze.

The black transparent glaze layer comprises the following components in parts by mass: potassium feldspar powder: 46 parts of calcite: 5 parts of air-knife kaolin: 6 parts of boron frit: 23 parts of barium carbonate: 7 parts of iron oxide red: 13 parts.

Wherein, the content of calcium oxide is as follows: 11.6 percent, the content of barium oxide is: 5.5 percent.

The ceramic tiles of examples 1 to 5 were evaluated for the night sky-river decoration effect, the bonding performance between the black transparent glaze and the opaque black glaze layer and between the opaque black glaze layer and the glitter glaze layer, and the modulus of rupture of the ceramic tiles were measured, and the evaluation results are shown in the following table.

As can be seen from the above table, the ceramic tile with the night sky-river decoration effect prepared by the method has excellent decoration effect and the combination property of the glaze surface and the glaze layer is excellent.

Comparative example 1

Comparative example 1 differs from example 1 in the formulation composition of the black clear glaze, reducing the contents of calcite and barium carbonate, and thus chromium oxide and barium oxide, in the formulation to a calcium oxide content of: 4.3%, the content of barium oxide is: 2.5 percent.

Comparative example 2

Comparative example 2 differs from example 1 in the formulation composition of the black clear glaze, increasing the contents of calcite and barium carbonate, and thus the contents of chromium oxide and barium oxide in the formulation, to give calcium oxide content: 15.2%, the content of barium oxide is: 10.5 percent.

Comparative example 3

The difference between the comparative example 3 and the example 1 is the formulation composition of the black transparent glaze, and the boron frit in the formulation is replaced by the ordinary frit.

Comparative example 4

Comparative example 4 differs from example 1 in the formulation composition of the black clear glaze, reducing the iron red content in the formulation to 5 parts.

Comparative example 5

Comparative example 5 differs from example 1 in the formulation composition of the black clear glaze, increasing the iron red content in the formulation to 20 parts.

The ceramic tiles of comparative examples 1 to 5 were evaluated for the night sky-river decoration effect and the bonding performance between the black transparent glaze and the opaque black glaze layer and the glittering glaze layer, and the modulus of rupture of the ceramic tiles was measured, and the evaluation results are shown in the following table.

From the above test data, it can be seen that when the contents of calcium oxide and barium oxide in the black transparent glaze are too high or too low, the bonding performance between the black transparent glaze and the opaque black glaze layer and between the black transparent glaze and the flashing glaze layer is reduced, when the black transparent glaze has no boron frits, the flashing effect is affected, and the overall decorative effect is reduced; when the content of iron red in the black transparent glaze is too small, the black color of the transparent glaze is not obvious enough, and the decorative effect is reduced integrally.

Comparative example 6

Comparative example 6 differs from example 1 in the green body formulation composition,

the black body layer comprises the following components in parts by weight: potassium-sodium stone powder: 22 parts of potassium stone powder: 13 parts of medium alumina sand: 20 parts of lime black mud: 21 parts of a stone powder: 17 parts of wollastonite particles: 4 parts of blank black pigment: and 3 parts.

Wherein, the content of CaO is: 2.5%, MgO content: 3% of Na₂The content of O is: 0.62 percent.

Comparative example 7

Comparative example 6 differs from example 1 in the green body formulation composition,

the black body layer comprises the following components in parts by weight: potassium-sodium stone powder: 23 parts of potassium stone powder: 13 parts of medium alumina sand: 21 parts of lime black mud: 20 parts of a stone powder: 15 parts of wollastonite particles: 5 parts of blank black pigment: and 3 parts.

Wherein, the content of CaO is: 2.9%, the content of MgO is: 4.1% of Na₂The content of O is: 0.52 percent.

Comparative example 8

Comparative example 8 differs from example 1 in the green body formulation composition,

the black body layer comprises the following components in parts by weight: potassium-sodium stone powder: 20 parts of potassium stone powder: 17 parts of medium alumina sand: 20 parts of lime black mud: 20 parts of a stone powder: 20 parts of wollastonite particles: 0 part of blank black pigment: and 3 parts.

Wherein, the content of CaO is: 0.6%, MgO content: 0.5% of Na₂The content of O is: 2.6 percent.

Comparative example 9

Comparative example 9 differs from example 1 in the green body formulation composition,

the black body layer comprises the following components in parts by weight: potassium-sodium stone powder: 27 parts of potassium stone powder: 15 parts of medium alumina sand: 20 parts of lime black mud: 20 parts of a stone powder: 5 parts of wollastonite particles: 10 parts of blank black pigment: and 3 parts.

Wherein, the content of CaO is: 6.5 percent, and the content of MgO is as follows: 5.2% of Na₂The content of O is: 0.2 percent.

Comparative example 10

Comparative example 6 differs from example 1 in the composition of the green body formulation, which contains no green black pigment.

Comparative example 11

Comparative example 6 differs from example 1 in the composition of the green body formulation in which the green black pigment is a black pigment comprising mainly cobalt, nickel and manganese oxides.

The ceramic tiles of comparative examples 6 to 11 were evaluated for the night sky-river decoration effect and the bonding performance between the black transparent glaze and the opaque black glaze layer and the glittering glaze layer, and the modulus of rupture of the ceramic tiles were measured, and the evaluation results are shown in the following table.

From the test data in the table above, it can be seen that when the contents of calcium oxide, magnesium oxide and sodium oxide in the black body are too high or too low, the fracture mode of the body is greatly affected, and when the content of MgO in the body formula is 2-4%, the content of CaO in the body formula is 2-3%, and Na in the body formula is₂When the content of O is in the range of 0.3-0.7%, the mechanical property of the iron-based black pigment blank is still good; when the chromaticity of the black body is not enough, the whole night sky and starriver decoration effect is influenced; when the black pigment of the green body does not adopt solid solution of ferric oxide and chromic oxide but adopts other black pigments mainly containing cobalt, nickel and manganese, the associativity of the green glaze is poor, the color matching property and the integral decorative effect of the green glaze are also poor, but the mechanical properties of nickel, manganese and the like are good.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the subject matter of the present application, which are made by the following claims and their equivalents, or which are directly or indirectly applicable to other related arts, are intended to be included within the scope of the present application.