阅读说明：本技术 数码浮雕陶瓷岩板及其制备方法 (Digital relief ceramic rock plate and preparation method thereof ) 是由 潘利敏 邓来福 汪庆刚 王贤超 庞伟科 黄玲艳 于 2021-09-26 设计创作，主要内容包括：本发明公开数码浮雕陶瓷岩板及其制备方法。所述制备方法包括以下步骤：在陶瓷岩板坯体表面施底釉；在施底釉后的坯体表面喷墨打印图案；在喷墨打印图案后的坯体表面定位喷墨打印窑变釉形成具有晶花效果的浮雕纹理；在喷墨打印窑变釉后的坯体表面施保护釉；烧成。该方法通过数码浮雕工艺与窑变釉结合,开发出一系列数码浮雕陶瓷岩板,板面立体感强,装饰效果丰富。(The invention discloses a digital relief ceramic rock plate and a preparation method thereof. The preparation method comprises the following steps: applying base coat on the surface of the ceramic rock plate blank; printing a pattern on the surface of the blank body after the ground coat is applied by ink jet; positioning ink-jet printing transmutation glaze on the surface of the blank after the pattern is printed by ink-jet printing to form relief texture with crystal flower effect; applying a protective glaze on the surface of the blank after the ink-jet printing of the transmutation glaze; and (5) firing. The method combines a digital relief process and the transmutation glaze to develop a series of digital relief ceramic rock plates, and the plate surface has strong stereoscopic impression and rich decorative effect.)

1. A preparation method of a digital relief ceramic rock plate is characterized by comprising the following steps:

applying base coat on the surface of the ceramic rock plate blank;

printing a pattern on the surface of the blank body after the ground coat is applied by ink jet;

positioning ink-jet printing transmutation glaze on the surface of the blank after the pattern is printed by ink-jet printing to form relief texture with crystal flower effect;

applying a protective glaze on the surface of the blank after the ink-jet printing of the transmutation glaze;

and (5) firing.

2. The preparation method according to claim 1, wherein the chemical composition of the transmutation glaze comprises: by mass percent, SiO₂：40～45%、Al₂O₃: 14 to 18%, alkaline earth metal oxide: 23-29%, alkali metal oxide: 2.5 to 4.5% of ZrO₂：5.0～7.0%、F：2.0～3.0%。

3. The preparation method according to claim 1 or 2, wherein the specific gravity of the transmutation glaze is 1.60-1.80 g/cm³The application amount is 100 to 400g/m²。

4. The method according to any one of claims 1 to 3, characterized in that the chemical composition of the under-glaze comprises, in mass%: SiO 2₂：55～60%、Al₂O₃: 21-24%, alkaline earth metal oxide: 0.2 to 1%, alkali metal oxide: 6.0 to 8.0% of ZrO₂：6.0～10.0%。

5. The method according to any one of claims 1 to 4, wherein the specific gravity of the ground coat is 1.25 to 1.40g/cm³The application amount is 300 to 650g/m²。

6. The method according to any one of claims 1 to 5, characterized in that the chemical composition of the protective glaze comprises: by mass percent, SiO₂：43～48%、Al₂O₃: 21-23%, alkaline earth metal oxide: 13-16%, alkali metal oxide: 4.0-6.0%, ZnO: 5.0 to 6.0 percent.

7. The method according to any one of claims 1 to 6, wherein the specific gravity of the protective glaze is 1.20 to 1.30g/cm³The application amount is 150 to 200g/m²。

8. The preparation method according to any one of claims 1 to 7, wherein the melting start temperature of the transmutation glaze is 1080-1130 ℃; the starting melting temperature of the protective glaze is 1100-1150 ℃; preferably, the difference value of the melting start temperatures of the transmutation glaze and the protective glaze is controlled to be 20-50 ℃.

9. The production method according to any one of claims 1 to 8, wherein the maximum firing temperature is 1180 to 1220 ℃, and the firing period is 60 to 180 minutes.

10. The digital relief ceramic rock plate obtained by the production method according to any one of claims 1 to 9.

Technical Field

The invention relates to a digital relief ceramic rock plate and a preparation method thereof, belonging to the technical field of production and manufacturing of building ceramics.

Background

With the rapid development of the ceramic industry in the whole world and the full customization of the home decoration industry, rock plates have a hot tide all over the country, so that the rock plates in China form a situation of hundreds of years of controversy. At present, the ceramic rock plate on the die surface is mainly realized by the following processes: 1. and printing convex glaze on the surface of the plane green brick by a roller. The decoration effect is relatively single in the mode, and the fineness degree is limited. 2. The engraving ink is ink-jet printed and a protective glaze is applied. Although relief engraving textures can be formed, this can result in the protective glaze peeling off. Generally, the high-temperature viscosity of the protective glaze is larger, and a higher application amount of the protective glaze is required for forming the carving texture with strong stereoscopic impression, but the transparent impression and the color difference of the protective glaze are easily caused, and the low application amount of the protective glaze can cause the shallow carving depth to influence the stereoscopic effect. 3. The mould texture is formed by pressing the traditional mould, the mould opening cost is high, and the excellent rate is low. 4. And stripping the base glaze, and spraying common glaze, wherein the carving decoration effect is single. 5. Printing the carved ink and stripping the overglaze to form the three-dimensional relief effect at a fixed position, and then carrying out ink-jet printing on the pattern and spraying the protective glaze. Although the three-dimensional relief effect can be generated, the defects are that the ink-jet printing pattern needs to be accurately aligned with the texture of the blank, otherwise, the frosting dislocation is easily generated, and in addition, the color gamut realized only by the ink-jet pattern is relatively narrow, and the transmutation effect is avoided.

Disclosure of Invention

Aiming at the problems, the invention provides a digital relief ceramic rock plate and a preparation method thereof.

In a first aspect, the invention provides a method for preparing a digital relief ceramic rock plate. The preparation method comprises the following steps:

applying base coat on the surface of the ceramic rock plate blank;

printing a pattern on the surface of the blank body after the ground coat is applied by ink jet;

positioning ink-jet printing transmutation glaze on the surface of the blank after the pattern is printed by ink-jet printing to form relief texture with crystal flower effect;

applying a protective glaze on the surface of the blank after the ink-jet printing of the transmutation glaze;

and (5) firing.

According to the preparation method, the transmutation glaze is printed in a positioning mode through a digital technology, compared with the relief texture formed by stripping the ground glaze through ink-jet printing engraving ink, the amount of the transmutation glaze is saved to a great extent, and the crystal pattern effect can be achieved in a local positioning mode. And the firing range of the transmutation glaze is relatively narrow compared with that of the common glaze, so that the brick surface defect caused by firing system fluctuation can be avoided, and the glaze surface defect introduced by large-area printing of the transmutation glaze is prevented by positioning the printing of the transmutation glaze.

Preferably, the chemical composition of the transmutation glaze comprises: by mass percent, SiO₂：40～45％、Al₂O₃: 14 to 18%, alkaline earth metal oxide: 23-29%, alkali metal oxide: 2.5 to 4.5% of ZrO₂: 5.0-7.0%, F: 2.0 to 3.0 percent. Controlling the chemical composition of the transmutation glaze within the above range can ensure that the glaze has proper high-temperature viscosity under the existing firing system, and can generate mutual fusion similar transmutation effect.

Preferably, the specific gravity of the transmutation glaze is 1.60-1.80 g/cm³The application amount is 100 to 400g/m²。

Preferably, the chemical composition of the ground glaze comprises, by mass percent: SiO 2₂：55～60％、Al₂O₃: 21-24%, alkaline earth metal oxide: 0.2 to 1%, alkali metal oxide: 6.0 to 8.0% of ZrO₂：6.0～10.0％。

Preferably, the specific gravity of the ground glaze is 1.25-1.40 g/cm³The application amount is 300 to 650g/m²。

Preferably, the chemical composition of the protective glaze comprises: by mass percent, SiO₂：43～48％、Al₂O₃: 21-23%, alkaline earth metal oxide: 13-16%, alkali metal oxide: 4.0-6.0%, ZnO: 5.0 to 6.0 percent.

Preferably, the specific gravity of the protective glaze is 1.20-1.30 g/cm³The application amount is 150 to 200 g-m²。

Preferably, the melting starting temperature of the transmutation glaze is 1080-1130 ℃; the starting melting temperature of the protective glaze is 1100-1150 ℃; preferably, the difference value of the melting start temperatures of the transmutation glaze and the protective glaze is controlled to be 20-50 ℃.

Preferably, the maximum firing temperature is 1180-1220 ℃, and the firing period is 60-180 minutes.

In a second aspect, the present invention provides a digital relief ceramic rock plate obtained by any one of the above preparation methods. The digital relief ceramic rock plate can be 600-1800 mm wide, 1200-9000 mm long and 6-20 mm thick.

Drawings

FIG. 1 is a flow chart of the preparation of a digital embossed ceramic rock plate;

FIG. 2 is a file effect diagram of an ink jet printed transmutation glaze for a digital embossed ceramic rock plate;

fig. 3 is a plate surface effect diagram of the digital relief ceramic rock plate.

Detailed Description

The present invention is further illustrated by the following examples, which are to be understood as merely illustrative of, and not restrictive on, the present invention. Unless otherwise specified, each percentage means a mass percentage.

The following is an exemplary description of the method for preparing the digital relief ceramic rock plate according to the present invention.

Preparing a ceramic rock plate blank. The ceramic rock plate blank may be prepared by dry press forming. The chemical composition of the ceramic rock plate blank is not limited, and the ceramic rock plate blank formula commonly used in the field can be adopted. In some embodiments, the chemical composition of the ceramic rock plate blank comprises: by mass percent, SiO₂：62～67％、Al₂O₃: 20-25%, alkaline earth metal oxide: 0.2 to 2.0%, alkali metal oxide: 4.0 to 7.0 percent. For example, the chemical composition of the ceramic rock plate blank includes: by mass percent, SiO₂：62～67％、Al₂O₃：20～25％、Fe₂O₃：0.06～0.10％、TiO₂：0.1～0.5％、CaO：0.1～0.5％、MgO：0.1～1.0％、K₂O：2.0～3.0％、Na₂O: 2.5-3.5%, loss on ignition: 4.5 to 6.5 percent.

The ceramic rock plate blank is dried. Drying in a drying kiln may be used. The drying time can be 1-1.5 h, and the moisture of the dried blank is controlled within 0.3-0.5 wt%.

And applying base coat on the surface of the dried blank. The function is to cover the base color and flaws of the blank body and promote the color development of the ink-jet pattern.

The ground glaze comprises the following chemical components in percentage by mass: SiO 2₂：55～60％、Al₂O₃: 21-24%, alkaline earth metal oxide: 0.2 to 1%, alkali metal oxide: 6.0 to 8.0% of ZrO₂: 6.0 to 10.0 percent. For example, the chemical composition of the under-glaze may include, in mass percent: SiO 2₂：55～60％、Al₂O₃：21～24％、Fe₂O₃：0.16～0.46％、TiO₂：0.15～0.25％、CaO：0.1～0.3％、MgO：0.1～0.3％、K₂O：4.0～5.0％、Na₂O：2.0～3.0％、ZrO₂: 6.0-10.0%, loss on ignition: 3.0 to 4.0 percent.

The application mode of the ground coat is glaze spraying. The specific gravity of the ground glaze is 1.25-1.40 g/cm³The application amount is 300 to 650g/m². The temperature of the green body discharged from the drying kiln is higher, and the glazing parameters of the ground coat are controlled in the range, so that the board surface can be smoother after glaze spraying, and the subsequent relief effect can be highlighted. If the application amount of the ground coat is less than 300g/m²In addition, the temperature is higher before the green brick is sprayed with glaze, the glaze dries too fast on the board surface, and atomized liquid drops form an uneven rough effect on the brick surface after glaze spraying. The application amount of the ground coat is more than 650g/m²The glaze dries too slowly on the plate surface, and the vibration generated in the operation process of the glaze line equipment easily causes local glaze flowing to cause uneven glaze surface.

And (4) carrying out ink-jet printing on the surface of the blank body after the ground coat is applied. The color and pattern of the ink jet printed pattern are adaptively changed depending on the design effect.

And positioning the ink-jet printing transmutation glaze on the surface of the blank after the pattern is printed by ink-jet printing to form the relief texture with the crystal flower effect. This provides a relief effect to the layout while also increasing the aesthetic appeal of the layout. The positioning finger can adjust the transmutation glaze file for digital printing according to the actual requirements and the texture adaptability of the ink-jet printing pattern so as to realize the corresponding local decoration effect. Selecting a file for digital printing according to the pattern texture is a known operation in the art, is not an innovative point of the technical scheme, and is not described herein again. Fig. 2 shows that the ink-jet printing pattern is used for extracting required textures from the ink-jet printing pattern to generate a transmutation glaze printing file, and the digital relief transmutation decoration effect is achieved at a specific position.

The chemical composition of the transmutation glaze comprises: by mass percent, SiO₂：40～45％、Al₂O₃: 14 to 18%, alkaline earth metal oxide: 23-29%, alkali metal oxide: 2.5 to 4.5% of ZrO₂: 5.0-7.0%, F: 2.0 to 3.0 percent. The transmutation glaze is prepared by mixing SiO₂、Al₂O₃And other flux is controlled within the range, so that the glaze material has proper high-temperature viscosity under the conventional firing system, and the mutual fusion similar transmutation effect can be generated.

In some embodiments, the chemical composition of the transmutation glaze comprises: by mass percent, SiO₂：40～45％、Al₂O₃：14～18％、Fe₂O₃：0.1～0.5％、TiO₂：0.1～0.5％、CaO：14～16％、MgO：4.5～6.5％、K₂O：1.0～2.0％、Na₂O：1.5～2.5％、ZrO₂: 5.0-7.0%, BaO: 4.5-6.5%, F: 2.0-3.0%, loss on ignition: 3.0 to 5.0 percent.

The transmutation glaze incorporates zirconia by using zirconium silicate. The zirconium silicate and other compositions of the transmutation glaze are fused with each other, particularly the compositions which form an amorphous phase and influence the high-temperature viscosity of the transmutation glaze, so that the transmutation effect is similar. And coloring oxides can be added into the transmutation glaze to carry out color decoration, so that different colors can be formed after the transmutation glaze is fired. Colored oxides include, but are not limited to, CoO, CuO, MnO, NiO, and the like.

The number of printing channels of the ink-jet printing transmutation glaze is preferably 2-3, so that better printing state and application amount can be ensured.

The specific gravity of the transmutation glaze is 1.60-1.80 g/cm³. The control of the specific gravity of the devitrified glaze within the above range is mainly in consideration of the state of the inkjet printing. Glaze with too high specific gravity dries too fast and is easy to agglomerate at a spray head to influence printing. Glaze is easy to drip when the specific gravity is too low, namely, the viscosity of the glaze is reduced due to higher moisture content, and when the negative pressure of the spray head reaches the upper limit, the viscosity is too low, so that the glaze drips out of the spray head. The application amount of the transmutation glaze is 100-400 g/m². The application amount of the transmutation glaze is too low, and the transmutation effect is not obvious. However, the (local) application amount of the transmutation glaze is too high, and the glaze material easily flows to the area where the transmutation glaze is not needed in the melting process, so that the plate surface decoration is not fine.

The relief effect is formed by positioning the ink-jet printing and applying the kiln-transformed glaze so as to promote the difference of the stacking thickness of the glaze at different positions. The starting melting temperature of the transmutation glaze is preferably 1080-1130 ℃. The melting temperature and high-temperature viscosity of the transmutation glaze (the melting temperature affects the high-temperature viscosity) cannot be too low, otherwise, the flowing glaze is easy to appear to cause the relief effect to be not three-dimensional. The specific gravity and the application amount of the transmutation glaze are relatively high, and the relief and crystal flower effects are more obvious.

The ink for ink-jet printing is not suitable for the invention, mainly because the main component of the ink for transmutation is zinc oxide, and the zinc oxide is usually used as a nucleating agent and is difficult to form crystal flowers under the condition of not matching with the zinc-titanium glaze. And the application amount of the transmutation ink is generally low, so that the three-dimensional relief decoration cannot be formed. Conventional spray application or spray application of crystalline glaze, while possibly having some transmutation effect, does not achieve the localized relief effect as in the present invention due to full-scale glazing.

And applying protective glaze on the surface of the blank after ink-jet printing and transmutation glaze. The aim is to protect the pattern from abrasion and to provide excellent anti-soiling properties.

The chemical composition of the protective glaze comprises: by mass percent, SiO₂：43～48％、Al₂O₃: 21-23%, alkaline earth metal oxide: 13-16%, alkali metal oxide: 4.0-6.0%, ZnO: 5.0 to 6.0 percent. In some embodiments, the chemical composition of the protective glaze comprises: by mass percent, SiO₂：43～48％、Al₂O₃：21～23％、Fe₂O₃：0.1～0.5％、TiO₂：0.1～0.5％、CaO：12.5～13.5％、MgO：1.0～2.0％、K₂O：0.8～1.3％、Na₂O: 3.5-4.5%, ZnO: 5.0-6.0%, loss on ignition: 5.5 to 6.5 percent.

The initial melting temperature of the protective glaze is 1100-1150 ℃. Preferably, the initial melting temperature difference value of the transmutation glaze and the protective glaze is controlled to be 20-50 ℃, so that the phenomenon that crystal patterns and relief effects generated by the transmutation glaze are weakened by the protective glaze on the upper layer can be avoided.

The protective glaze is applied in a glaze spraying manner. The specific gravity of the protective glaze is 1.20-1.30 g/cm³The application amount is 150 to 200g/m². Too high an application amount of the protective glaze can affect the transmutation and the relief stereoscopic effect. The main reason is that the firing temperature and high-temperature viscosity of the protective glaze are high, the excessive protective glaze can be mutually interwoven with the transmutation glaze at the lower layer in the firing process to influence the crystal pattern effect of transmutation, and in addition, the excessive protective glaze can reduce the thickness difference of the glaze layer at the position where the transmutation glaze is locally accumulated and the transmutation glaze is not accumulated due to mutual melting of the glaze, so that the relief texture is weakened or the stereoscopic impression is lost.

And drying the blank body after the protective glaze is applied. Either electric drying or hot air oven drying may be used. The drying temperature is 100-150 ℃, and the moisture of the dried blank is controlled within 0.9 wt%.

And (5) firing. The highest firing temperature can be 1180-1220 ℃, and the firing period can be 60-180 minutes.

According to the preparation method of the digital relief ceramic rock plate, the local relief texture effect is obtained by digitally positioning and printing the transmutation glaze, so that transmutations with different colors are formed, and the decorative effect is rich. In some embodiments, the ceramic slate has a surface gloss of 8 to 50 degrees.

The present invention will be described in detail by way of examples. It is also to be understood that the following examples are illustrative of the present invention and are not to be construed as limiting the scope of the invention, and that certain insubstantial modifications and adaptations of the invention by those skilled in the art may be made in light of the above teachings. The specific process parameters and the like of the following examples are also only one example of suitable ranges, i.e., those skilled in the art can select the appropriate ranges through the description herein, and are not limited to the specific values exemplified below.

Example 1

The preparation method of the digital relief ceramic rock plate comprises the following steps:

step 1, preparing a ceramic rock plate blank through dry pressing;

step 2, drying the blank for 1-1.5 h, wherein the water content of the dried blank is 0.3-0.5 wt%;

step 3, spraying base coat on the surface of the dried blank; the chemical composition of the ground glaze comprises: by mass percent, SiO₂：55～60％、Al₂O₃：21～24％、Fe₂O₃：0.16～0.46％、TiO₂：0.15～0.25％、CaO：0.1～0.3％、MgO：0.1～0.3％、K₂O：4.0～5.0％、Na₂O：2.0～3.0％、ZrO₂: 6.0-10.0%, loss on ignition: 3.0-4.0%; the specific gravity of the ground coat is 1.25-1.40 g/cm³The application amount is 300 to 650g/m²；

Step 4, ink-jet printing patterns on the surface of the blank body after the ground coat is sprayed;

step 5, ink-jet printing of the transmutation glaze on the surface of the blank after ink-jet printing of the pattern; the chemical composition of the transmutation glaze comprises: by mass percent, SiO₂：40～45％、Al₂O₃：14～18％、Fe₂O₃：0.1～0.5％、TiO₂：0.1～0.5％、CaO：14～16％、MgO：4.5～6.5％、K₂O：1.0～2.0％、Na₂O：1.5～2.5％、ZrO₂: 5.0-7.0%, BaO: 4.5-6.5%, F: 2.0-3.0%, loss on ignition: 3.0-5.0%; the specific gravity of the transmutation glaze is 1.60-1.80 g/cm³The application amount is 100 to 400g/m²；

Step 6, spraying protective glaze on the surface of the blank after ink-jet printing of the fambe glaze; the chemical composition of the protective glaze comprises: by mass percent, SiO₂：43～48％、Al₂O₃：21～23％、Fe₂O₃：0.1～0.5％、TiO₂：0.1～0.5％、CaO：12.5～13.5％、MgO：1.0～2.0％、K₂O：0.8～1.3％、Na₂O: 3.5-4.5%, ZnO: 5.0-6.0%, loss on ignition: 5.5-6.5%; the specific gravity of the protective glaze is 1.20-1.30 g/cm³The application amount is 150 to 200g/m²；

Step 7, drying the blank body sprayed with the protective glaze at the drying temperature of 100-150 ℃, and controlling the moisture of the dried blank body within 0.9 wt%;

step 8, sintering, wherein the maximum sintering temperature is 1220 ℃, and the sintering period is 60-120 minutes;

and 9, edging, grading, packaging and warehousing.

Figure 3 shows that the digital relief ceramic rock plate has the fambe crystal flower decoration and the three-dimensional relief texture.

Comparative example 1

The preparation method of the ceramic rock plate comprises the following steps:

step 1, preparing a ceramic rock plate blank through dry pressing;

step 2, drying the blank for 1-1.5 h, wherein the water content of the dried blank is 0.3-0.5 wt%;

step 3, spraying base coat on the surface of the dried blank; the chemical composition of the ground glaze comprises: by mass percent, SiO₂：55～60％、Al₂O₃：21～24％、Fe₂O₃：0.16～0.46％、TiO₂：0.15～0.25％、CaO：0.1～0.3％、MgO：0.1～0.3％、K₂O：4.0～5.0％、Na₂O：2.0～3.0％、ZrO₂: 6.0-10.0%, loss on ignition: 3.0-4.0%; the specific gravity of the ground coat is 1.25-1.40 g/cm³The application amount is 300 to 650g/m²；

Step 4, ink-jet printing patterns on the surface of the blank body after the ground coat is sprayed;

step 5, sequentially applying a first transmutation glaze and a second transmutation glaze on the surface of the blank body after the pattern is printed by ink jet; the application modes of the first transmutation glaze and the second transmutation glaze are both ink-jet printing; the chemical composition of the first transmutation glaze comprises: by massIn percent, SiO₂：48～55％、Al₂O₃：9.0～13％、Fe₂O₃：0.1～0.5％、TiO₂：3.0～7.0％、CaO：4.0～7.0％、MgO：1.0～2.0％、K₂O：4.0～5.0％、Na₂O: 3.0-4.0%, ZnO: 9.0-12.0%, BaO: 1.5-2.5%, loss on ignition: 5.5-6.5%; the specific gravity of the first transmutation glaze is 1.60-1.80 g/cm³The application amount is 100 to 400g/m²(ii) a The chemical composition of the second transmutation glaze comprises: by mass percent, SiO₂：45～50％、Al₂O₃：8.0～12.0％、Fe₂O₃：0.1～0.5％、TiO₂：8.0～12.0％、CaO：4.0～7.0％、MgO：1.0～2.0％、K₂O：3.0～4.0％、Na₂O：3.0～4.0％、ZnO：10.0～14.0％、ZrO₂: 3.0-5.0%, loss on ignition: 2.5-4.5%; the specific gravity of the second transmutation glaze is 1.60-1.80 g/cm³The application amount is 100 to 400g/m²；

Step 6, spraying protective glaze on the surface of the blank body after the first transmutation glaze and the second transmutation glaze are applied; the chemical composition of the protective glaze comprises: by mass percent, SiO₂：43～48％、Al₂O₃：21～23％、Fe₂O₃：0.1～0.5％、TiO₂：0.1～0.5％、CaO：12.5～13.5％、MgO：1.0～2.0％、K₂O：0.8～1.3％、Na₂O: 3.5-4.5%, ZnO: 5.0-6.0%, loss on ignition: 5.5-6.5%; the specific gravity of the protective glaze is 1.20-1.30 g/cm³The application amount is 150 to 200g/m²；

Step 7, drying the blank body sprayed with the protective glaze at the drying temperature of 100-150 ℃, and controlling the moisture of the dried blank body within 0.9 wt%;

step 8, sintering, wherein the maximum sintering temperature is 1220 ℃, and the sintering period is 60-120 minutes;

and 9, edging, grading, packaging and warehousing.

Due to Al of the first transmutation glaze and the second transmutation glaze₂O₃The content is low, the content of other fluxing agents is high, and the relief effect of the brick surface after firing is not obvious.

Comparative example 2

The preparation method of the ceramic rock plate comprises the following steps:

step 1, preparing a ceramic rock plate blank through dry pressing;

step 2, drying the blank for 1-1.5 h, wherein the water content of the dried blank is 0.3-0.5 wt%;

step 3, spraying base coat on the surface of the dried blank; the chemical composition of the ground glaze comprises: by mass percent, SiO₂：55～60％、Al₂O₃：21～24％、Fe₂O₃：0.16～0.46％、TiO₂：0.15～0.25％、CaO：0.1～0.3％、MgO：0.1～0.3％、K₂O：4.0～5.0％、Na₂O：2.0～3.0％、ZrO₂: 6.0-10.0%, loss on ignition: 3.0-4.0%; the specific gravity of the ground coat is 1.25-1.40 g/cm³The application amount is 300 to 650g/m²；

Step 4, ink-jet printing patterns on the surface of the blank body after the ground coat is sprayed;

step 5, ink-jet printing of the transmutation glaze on the surface of the blank after ink-jet printing of the pattern; the chemical composition of the transmutation glaze comprises: by mass percent, SiO₂：40～45％、Al₂O₃：14～18％、Fe₂O₃：0.1～0.5％、TiO₂：0.1～0.5％、CaO：14～16％、MgO：4.5～6.5％、K₂O：1.0～2.0％、Na₂O：1.5～2.5％、ZrO₂: 5.0-7.0%, BaO: 4.5-6.5%, F: 2.0-3.0%, loss on ignition: 3.0-5.0%; the specific gravity of the transmutation glaze is 1.60-1.80 g/cm³The application amount is 100 to 400g/m²；

Step 6, spraying protective glaze on the surface of the blank after ink-jet printing of the fambe glaze; the chemical composition of the protective glaze comprises: by mass percent, SiO₂：48～55％、Al₂O₃：13～15％、Fe₂O₃：0.1～0.5％、TiO₂：0.1～0.5％、CaO：9.0～12.0％、MgO：2.5～3.5％、K₂O：2.0～3.0％、Na₂O: 2.0-3.0%, ZnO: 2.0-3.0%, BaO: 3.0-5.0%, loss on ignition: 6.5-8.5%; of protective glazesThe specific gravity is 1.20-1.30 g/cm³The application amount is 150 to 200g/m²；

Step 7, drying the blank body sprayed with the protective glaze at the drying temperature of 100-150 ℃, and controlling the moisture of the dried blank body within 0.9 wt%;

step 8, sintering, wherein the maximum sintering temperature is 1220 ℃, and the sintering period is 60-120 minutes;

and 9, edging, grading, packaging and warehousing.

The relatively low-temperature protective glaze in the comparative example has a certain fluxing action on the transmutation glaze, so that the transmutation glaze is partially melted and flows out of the grain boundary, and the fineness is poor. And the surface glossiness of the ceramic rock plate after firing is 85-90 degrees, the surface glossiness is higher, a very bright feeling is given to people, and the artistic aesthetic feeling is reduced.