Fluorescent effect ceramic tile with chicken blood stone texture and preparation process thereof

Abstract

The present application relates to the field of ceramic tiles, and discloses a fluorescent effect ceramic tile imitating the texture of chicken blood stone and a preparation process thereof. The fluorescent effect ceramic tile imitating the texture of chicken blood stone comprises a body layer and a pattern decoration layer, the body layer contains rare earth fluorescent material, the pattern decoration layer is attached to the body layer, and at least part of the area of the pattern decoration layer is red frit glaze containing rare earth fluorescent material. The ceramic tile with such a structure can imitate the chicken blood stone in nature, and the red frit glaze has the decoration effect of natural chicken blood stone under the fluorescence reflection of the rare earth fluorescent material in the body and the glaze layer.

Description

Technical Field

[0001] This invention relates to the field of ceramic tiles, and in particular to a fluorescent ceramic tile with a bloodstone-like texture and its preparation process. Background Technology

[0002] Cinnabar stone, as one of the top-grade rare stones, is deeply loved by people for its bright red color and rare production. Cinnabar stone is a naturally formed gemstone, which is not easy to form and has a very small production volume. It is extremely rare both domestically and internationally, and its price is very high, making it unsuitable for mass production and decoration.

[0003] In the ceramics industry, the main production processes for red ceramic tiles employ inkjet printing technology, such as red ink, and screen printing processes, such as coating with red material. However, the resulting red effect has certain limitations.

[0004] Taking ceramic tiles made using printing techniques to imitate chicken-blood stone as an example, the decorative texture with red patterns is only a thin layer, lacking depth, vibrancy, and transparency. Furthermore, the red texture prepared by digital inkjet printing lacks sufficient layering and texture. Screen printing, using pigments, often results in the appearance of screen lines and patterns. For these reasons, ceramic tiles produced using existing processes cannot closely resemble natural chicken-blood stone, and even judging from just one dimension—color, layering, or similarity—it is impossible to achieve a near-perfect imitation. Summary of the Invention

[0005] To address the problems raised in the background art, a primary objective of this invention is to provide a fluorescent ceramic tile with a texture resembling chicken-blood stone. This tile comprises a body layer and a decorative pattern layer. The body layer contains rare-earth fluorescent materials, and the decorative pattern layer is attached to the body layer. At least a portion of the decorative pattern layer is a red frit glaze containing rare-earth fluorescent materials. The body layer contains rare-earth fluorescent materials, enabling it to fluoresce under light. The decorative pattern layer on the surface is at least partially covered with a red frit glaze containing rare-earth fluorescent materials, which fluoresce upon light exposure. This ceramic tile structure mimics natural chicken-blood stone, and the red frit glaze, illuminated by the fluorescence emitted by the rare-earth fluorescent materials in the body and glaze layers, achieves the decorative effect of natural chicken-blood stone.

[0006] Preferably, in the above-mentioned fluorescent ceramic tile with a bloodstone-like texture, a layer of red semi-transparent protective glaze is also attached to the patterned decorative layer.

[0007] Preferably, in the aforementioned fluorescent ceramic tile with a bloodstone-like texture, the rare-earth fluorescent material is a red rare-earth fluorescent material. After being excited by light, the red rare-earth fluorescent material emits red fluorescence, which, combined with the translucent body, gives the ceramic tile a crystal-clear visual effect. Further, the red rare-earth fluorescent material is Eu³⁺. +Doped Y₂O₃–Al₂O₃–SiO₂ (YAS) glass phase. Eu³ + The doped Y2O3–Al2O3–SiO2 (YAS) glass phase has a bright red color, which can give the ceramic tile a bright red and translucent effect.

[0008] Preferably, in the above-mentioned fluorescent ceramic tile with a bloodstone-like texture, the chemical composition of the raw materials used to prepare the body layer, by mass percentage, includes: SiO2 63.1-66.3%, Al2O3 18.5-21.4%, K2O 1.4-3.5%, CaO 2.5-3.8%, MgO 0.2-1.9%, Eu2O3 0.6-1.1%, Y2O3 3.9-6.2%, and loss on ignition 4.3-7.2%.

[0009] The raw materials with the above chemical composition, after being made into brick blanks, have high whiteness (whiteness ≥ 70 degrees), and the Eu2O3 and Y2O3 in them will form Eu³ during the firing process. + The doped Y2O3–Al2O3–SiO2 (YAS) glass phase is a rare earth fluorescent material that can emit bright red light after illumination.

[0010] Preferably, the red frit glaze is prepared by melting and cooling red frit dry particles. The raw materials for preparing the red frit dry particles include basic raw materials and red pigment. By mass percentage, the basic raw materials are 100 parts, and the red pigment is 2-4 parts. The chemical composition of the basic raw materials by mass percentage includes: SiO2 55.8-59.2%, Al2O3 15.5-17.6%, K2O 1.6-3.1%, CaO 2.3-3.2%, MgO 0.2-1.8%, ZnO 4.1-6.9%, SnO2 2.1-3.6%, Eu2O3 0.8-1.6%, Y2O3 4.9-7.1%, FeSeO 4 3.5-6.1%, and loss on ignition 2.9-5.5%. The red pigment is at least one of coated red or zirconium iron red. Further preferred, the red pigment is a mixture of coated red and zirconium iron red, with a mass ratio of coated red to zirconium iron red of 1:1 to 3. Coated red is a ceramic colorant with a Cd-Se-Zr-Si composite system as its main component, which has excellent high-temperature resistance. Zirconium iron red is also a well-known high-temperature resistant red pigment. Using both as raw materials for the red pigment, and mixing them evenly with the base raw materials, followed by melting and water quenching, yields red frit dry granules. The color of the pigment can be well maintained, and the Eu2O3 and Y2O3 in the base raw materials will form Eu³ during the high-temperature melting process. + The doped Y2O3–Al2O3–SiO2 (YAS) glass phase, when the red frit dry particles prepared in this formulation system form a red glaze layer with a bright red, blood-clotting-like "blood-activating" effect.

[0011] Preferably, the raw materials for preparing the red translucent protective glaze, by mass percentage, have the following chemical composition: SiO2 57.5–59.3%, Al2O3 8.5–11.2%, K2O 2.8–4.5%, ZnO 3.1–5.2%, BaO 7.3–10.5%, FeSeO 4 2.1–3.2%, Fe2O3 0.4–0.9%, MgO 2.1–3.6%, and loss on ignition 3.6–6.2%. Using the red translucent protective glaze not only protects the decorative pattern layer but also provides a more realistic effect when creating imitation natural bloodstone ceramic tiles that include textures and patterns other than red. While pure red chicken-blood stone is precious, it is very difficult to match with other colors when used as a wall or floor decoration material. Considering the color matching effect of wall / floor decoration, chicken-blood stone with other colored patterns is often chosen instead of pure-colored chicken-blood stone. To better imitate the patterns, colors, and translucent texture of this natural chicken-blood stone, printed decorations are applied to the brick blank. Natural chicken-blood stone with other colored patterns often has some red accents. The red translucent protective glaze provided in this preferred solution contains FeSeO4 and Fe2O3 in its raw materials. Under this raw material composition system, a red translucent protective glaze layer can be formed after firing. The color patterns under the red translucent protective glaze layer will create a richer and more natural decorative effect.

[0012] Another objective of this invention is to provide a process for preparing fluorescent ceramic tiles with a bloodstone-like texture, comprising the following steps: Step 1: Select raw materials for ceramic blanks to prepare brick blanks. The raw materials for ceramic blanks contain rare earth materials that can be synthesized into rare earth fluorescent materials after firing. Step 2: Spray glue onto the brick blank. Spray the glue according to the preset pattern area. Apply red frit dry granules. The red frit dry granules contain red rare earth fluorescent material and absorb the red frit dry granules that are not adhered to by the glue. Step 3: Firing.

[0013] Preferably, the whiteness of the brick blank is ≥70 degrees.

[0014] Preferably, the chemical composition of the raw materials for the ceramic body, by mass percentage, includes: SiO2 63.1–66.3%, Al2O3 18.5–21.4%, K2O 1.4–3.5%, CaO 2.5–3.8%, MgO 0.2–1.9%, Eu2O3 0.6–1.1%, Y2O3 3.9–6.2%, and loss on ignition 4.3–7.2%. The raw materials for preparing red frit dry pellets include basic raw materials and red pigment. By mass percentage, the basic raw materials comprise 100 parts, and the red pigment comprises 2–4 parts. The chemical composition of the basic raw materials, by mass percentage, includes: SiO2 55.8–59.2%, Al2O3 15.5–17.6%, K2O 1.6–3.1%, CaO 2.3–3.2%, MgO 0.2–1.8%, ZnO 4.1–6.9%, SnO2 2.1–3.6%, Eu2O3 0.8–1.6%, Y2O3 4.9–7.1%, FeSeO4 3.5–6.1%, and loss on ignition 2.9–5.5%. The red pigment is a mixture of coated red and zirconium iron red, with a mass ratio of coated red to zirconium iron red of 1:1–3. Step 2 and step 3 also include step 21 and / or step 22; Step 21 involves printing a pattern onto the brick blank using a known printing process to form a decorative pattern that is composite with the red frit dry granules. The printing process includes, but is not limited to, screen printing, roller printing, and inkjet printing and combinations thereof. Other existing processes for forming decorative patterns, such as glazing, are also applicable. Step 22 involves applying a red translucent protective glaze. The raw materials of the red translucent protective glaze, by mass percentage, have the following chemical composition: SiO2 57.5–59.3%, Al2O3 8.5–11.2%, K2O 2.8–4.5%, ZnO 3.1–5.2%, BaO 7.3–10.5%, FeSeO4 2.1–3.2%, Fe2O3 0.4–0.9%, MgO 2.1–3.6%, and loss on ignition 3.6–6.2%. Step 3, the temperature control process for firing, includes: During the preheating stage, the temperature is raised from room temperature to 300℃ at a heating rate of 15-20℃ / min. During the oxidative decomposition stage, the temperature is increased from 300℃ to 950℃ at a heating rate of 25-35℃ / min. In the high-temperature stage, the temperature is increased from 950°C to the maximum firing temperature at a heating rate of 15-20°C / min, wherein the maximum firing temperature is 1165-1225°C. During the heat preservation stage, maintain the highest firing temperature for 5–9 minutes; During the cooling stage, the temperature is reduced from the highest temperature to 600℃ at a cooling rate of 25-30℃ / min, then reduced from 600℃ to 530℃ at a cooling rate of 10-15℃ / min, and then further reduced from 530℃ to 95℃ at a cooling rate of 25-30℃ / min. After exiting the kiln, the temperature is allowed to cool naturally.

[0015] The fluorescent ceramic tile with a bloodstone-like texture provided by this invention has a more realistic effect, and the preferred solution can imitate a more upscale bright red "blood-like" effect, filling the gap in the decorative effect of ceramic tiles. Attached Figure Description

[0016] Appendix Figure 1 This is a photograph of the fluorescent ceramic tile with a bloodstone-like texture prepared in Example 21 of the present invention. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. At the same time, the raw materials mentioned below, unless otherwise specified, are all commercially available products; the process steps or preparation processes not mentioned in detail are all process steps or preparation processes known to those skilled in the art.

[0018] Judging the texture of chicken-blood stone is somewhat subjective. In order to better evaluate the implementation scheme, we have formulated the following evaluation criteria for the effect of imitation chicken-blood stone.

[0019] The fluorescent effect of the ceramic tile with the imitation bloodstone texture prepared by this invention is evaluated as follows: Red vibrancy. Inspectors visually assessed the red vibrancy of the tiles under natural light, evaluating the brightness and vividness of the red color, and grading it according to the following standards: Advantages: The color is very bright, rich, and clear. Under natural light, the color is vibrant and lively, and the bright red color is like the "living blood" of congealed blood. Good: The color is bright and rich, but the transparency is somewhat lacking; Medium: The color is dark or light, not transparent, and has slight color difference; Poor: The color is dull or too light, not transparent, and the color difference is obvious.

[0020] Ten inspectors were selected at a time to conduct testing and rating, and the rating standard with the highest percentage was used as the final rating standard for the brightness of red.

[0021] Excellent, Good, and Medium grades can all be defined as successfully imitating the fluorescent effect of chicken-blood stone texture in ceramic tiles, while Poor grades are unqualified products.

[0022] Examples 1-10 The preparation process for this series of embodiments is as follows: A process for preparing a fluorescent ceramic tile with a bloodstone-like texture includes the following steps: Step 1: According to the raw material oxide mass percentage ratio in Table 1, select the raw materials for ceramic blanks to prepare high whiteness brick blanks; Step 2: Spray glue onto the brick blank and apply red frit dry granules. The red frit dry granules contain red rare earth fluorescent material, which absorbs the red frit dry granules that are not adhered to by the glue. Step 3: Firing.

[0023] In step 2, the adhesive used is CIK-AD1109 adhesive from Foshan Yidajia Precision Ceramics Technology Co., Ltd., which is sprayed onto the surface of the brick blank using an inkjet printer; the amount of adhesive sprayed is 120-180 grams per square meter; the red frit dry granules are made by adding red pigment to the base raw material and then melting and quenching it at high temperature. The frit particle size is less than or equal to 120 mesh. Based on 100 parts of the base raw material mass, the amount of red pigment added is 2 parts. The red pigment is a mixture of coated red and zirconium iron red pigment in a 1:1 mass ratio. In this embodiment, the amount of frit dry granules used is 450 grams per square meter.

[0024] Table 1 Taking Example 10 as an example, the raw materials for the brick blank, by mass parts, are: 19 parts washed kaolin, 5 parts washed clay, 6 parts bentonite, 23 parts quartz, 9 parts wollastonite, 6 parts calcined talc, 6 parts anorthite, 12 parts high-alumina potassium sand, 1 part europium oxide powder, and 6 parts yttrium oxide powder. After pretreatment, the prepared brick blank has a high whiteness (approximately 76 degrees after firing). The particle size of both europium oxide and yttrium oxide powder is in the micrometer range. Furthermore, the brick blank produced by this formula is relatively transparent after firing, with a light transmittance of 2.1%. Transparent brick blanks have a positive effect on the function of rare earth fluorescent materials.

[0025] The above mineral raw materials are ball-milled with water to form a slurry, which is then aged and homogenized, spray-granulated to form powder, and the powder is pressed into ceramic tile blanks with a thickness of 9.5mm.

[0026] The chemical composition of the basic raw material for preparing red frit dry pellets, by mass percentage, includes: The composition of SiO2 is 56.6%, Al2O3 is 16.1%, K2O is 2.0%, CaO is 2.5%, MgO is 0.8%, ZnO is 4.9%, SnO2 is 2.7%, Eu2O3 is 1.3%, Y2O3 is 5.7%, FeSeO is 4.3%, and loss on ignition is 3.1%.

[0027] The mineral raw materials used to prepare it, by mass parts, are: 15 parts washed kaolin, 6 parts washed clay, 5 parts bentonite, 20 parts quartz, 7 parts wollastonite, 5 parts calcined talc, 8 parts calcium feldspar, 15 parts high-alumina potassium sand, 5 parts calcined zinc oxide, 2.7 parts tin dioxide, 1.3 parts europium oxide powder, 5.7 parts yttrium oxide powder, and 4.3 parts ferrous selenate.

[0028] Mix the base raw materials and red pigment evenly, melt at high temperature (above 1400℃), keep warm for 20 minutes, pour the molten glass into cold water for water quenching, and obtain red frit dry granules. After crushing and sieving, use particles with a particle size of less than or equal to 120 mesh.

[0029] The temperature control process for firing in step 3 includes: During the preheating stage, the temperature is increased from room temperature to 300℃ at a heating rate of 17℃ / min. In the oxidative decomposition stage, the temperature is increased from 300℃ to 950℃ at a heating rate of 30℃ / min. In the high-temperature stage, the temperature is increased from 950°C to the maximum firing temperature, which is 1200°C, at a heating rate of 17°C / min. During the heat preservation stage, maintain the highest firing temperature for 6 minutes; During the cooling stage, the temperature is reduced from the highest temperature to 600℃ at a cooling rate of 27℃ / min, then reduced from 600℃ to 530℃ at a cooling rate of 13℃ / min, and then reduced from 530℃ to 95℃ at a cooling rate of 27℃ / min. After exiting the kiln, the temperature is allowed to cool naturally.

[0030] The testers observed and tested the ceramic tiles prepared in Examples 1-10, and recorded the results in Table 2 below according to the preset testing standards.

[0031] Table 2 Examples 11-13 Referring to Example 10, europium oxide and yttrium oxide in the raw materials were replaced (including not added) to prepare Examples 11-13, as detailed in Table 3 below.

[0032] Table 3 Through the above comparison, the rare earth fluorescent material in the body will be excited and emit fluorescence after being exposed to light, making the red frit glaze on the surface of the body more transparent. Even if the rare earth fluorescent material that is not red fluorescent is replaced, it will still have a certain effect, but the non-red fluorescent material will cause a slight color difference.

[0033] Eu³ +Doped Y2O3–Al2O3–SiO2 (YAS) glass phase is the first choice for rare earth fluorescent materials, which can excite bright red light, making the red frit glaze layer more beautiful.

[0034] Adding ferrous selenate to the raw materials of red frit glaze and using coated red and zirconium iron red as red pigments to prepare frit particles can produce a transparent and vibrant bright red color. Coated red and zirconium iron red are well-known high-temperature resistant red ceramic pigments, which can minimize the impact of high-temperature melting and high-temperature sintering on the color development of the pigments. Components such as zinc oxide and tin oxide used in the frit raw materials can also promote the color development of the red pigments. Examples 14-20 To compare the effect of ferrous selenate in the frit glaze raw materials, based on Example 10, the amount of ferrous selenate was adjusted, and the effect of the change in the proportion of ferrous selenate in the basic raw materials for frit preparation on the final imitation bloodstone effect was observed. See Table 4 for details.

[0035] Table 4 Based on the data analysis of the above embodiments, in order to obtain a better decorative effect of imitation bloodstone, the amount of ferrous selenate in the basic raw material for preparing red frit dry particles should be 3.5% to 6.1%.

[0036] Example 21 Examples 1-20 describe a full-page application of red frit dry granules, where adhesive is sprayed onto the entire surface of the brick blank using an inkjet printer to create a full-page effect, resulting in a completely red ceramic tile. However, the application of completely red ceramic tiles is very limited, and most natural chicken-blood stone contains other colored patterns. To imitate this type of chicken-blood stone, this patent provides Example 21.

[0037] The preparation process is based on Example 10, except that: (1) Step 2: Print glue according to the preset red pattern area, apply red frit dry granules, remove excess red frit dry granules, and retain red frit dry granules only in the pattern area of ​​the printed glue. After the glue dries and cures, print the decorative pattern. In this embodiment, a combination of screen printing and inkjet printing is used to form a decorative pattern other than red on the surface of the brick blank.

[0038] (2) After printing, apply a layer of red semi-transparent protective glaze to the surface of the brick blank. The raw materials of the red semi-transparent protective glaze, by mass parts, include: 30 parts potassium feldspar, 1 part calcined alumina powder, 7 parts calcined kaolin, 8 parts calcined talc powder, 3 parts calcined zinc oxide, 12 parts barium carbonate, 15 parts quartz powder, 2 parts ferrous selenate, and 0.4 parts iron oxide.

[0039] Weigh the raw materials according to the above glaze formula, add water and ball mill until the fineness is 0.1% residue on a 325-mesh sieve. Adjust the specific gravity of the glaze slurry to 1.25 g / mL. Apply the glaze evenly by spraying, with an application rate of 70 g / m².

[0040] The rest is the same as in Example 10. The imitation chicken-blood stone ceramic bricks prepared after firing are shown in the attached figure. Figure 1 From the appendix Figure 1 As can be seen, the translucent glaze also has a light red color, and against the white background pattern, the surface of the translucent red glaze has unevenly distributed light red areas, making the decorative effect closer to the stone texture and uneven color distribution of natural chicken blood stone.

[0041] Examples 22-25 The differences in formulation and effects of translucent glazes are detailed in Table 5 below.

[0042] Using similar methods, the chemical composition of the red translucent glaze raw material, measured by mass percentage, showed good overall performance within the following range: SiO2 57.5–59.3%, Al2O3 8.5–11.2%, K2O 2.8–4.5%, ZnO 3.1–5.2%, BaO 7.3–10.5%, FeSeO4 2.1–3.2%, Fe2O3 0.4–0.9%, MgO 2.1–3.6%, and loss on ignition 3.6–6.2%. Under this formulation, not only can a translucent protective layer be formed, but within an appropriate range, FeSeO4 can also form red agglomeration areas. Combined with the color and texture of the printed pattern layer, this can create a more realistic imitation of chicken-blood stone with other colored patterns. After the dry red frit particles melt, they form a transparent and bright red area, with other colored decorative textures that transition naturally around it. The rare earth fluorescent materials in the body layer and the red frit glaze layer emit fluorescence after being exposed to light. Combined with the red clusters in the surface red translucent glaze layer, it presents a decorative effect similar to that of natural high-grade chicken blood stone after cutting and polishing.

[0043] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A fluorescent ceramic tile with a simulated bloodstone texture, characterized in that, It includes a blank layer and a patterned decorative layer. The blank layer contains rare earth fluorescent material, and the patterned decorative layer is attached to the blank layer. At least a portion of the patterned decorative layer is a red frit glaze containing the rare earth fluorescent material. The chemical composition of the raw materials used to prepare the green body layer, by mass percentage, includes: SiO2 63.1–66.3%, Al2O3 18.5–21.4%, K2O 1.4–3.5%, CaO 2.5–3.8%, MgO 0.2–1.9%, Eu2O3 0.6–1.1%, Y2O3 3.9–6.2%, and loss on ignition 4.3–7.2%. The red frit glaze is prepared by melting and cooling red frit dry particles. The raw materials for preparing the red frit dry particles consist of basic raw materials and red pigments. By mass percentage, the basic raw materials are 100 parts, and the red pigments are 2-4 parts. The chemical composition of the basic raw materials by mass percentage includes: SiO2 55.8-59.2%, Al2O3 15.5-17.6%, K2O 1.6-3.1%, CaO 2.3-3.2%, MgO 0.2-1.8%, ZnO 4.1-6.9%, SnO2 2.1-3.6%, Eu2O3 0.8-1.6%, Y2O3 4.9-7.1%, FeSeO4 3.5-6.1%, and loss on ignition 2.9-5.5%. The red pigment is a mixture of coated red and zirconium iron red, with a mass ratio of coated red to zirconium iron red of 1:1-3.

2. The fluorescent ceramic tile with a bloodstone-like texture as described in claim 1, characterized in that, A layer of red semi-transparent protective glaze is also attached to the patterned decorative layer.

3. The fluorescent ceramic tile with a bloodstone-like texture as described in claim 2, characterized in that, The raw materials for preparing the red translucent protective glaze, by mass percentage, have the following chemical composition: SiO2 57.5–59.3%, Al2O3 8.5–11.2%, K2O 2.8–4.5%, ZnO 3.1–5.2%, BaO 7.3–10.5%, FeSeO4 2.1–3.2%, Fe2O3 0.4–0.9%, MgO 2.1–3.6%, and loss on ignition 3.6–6.2%.

4. A preparation process for a fluorescent ceramic tile with a bloodstone-like texture, characterized in that, The method for preparing fluorescent ceramic tiles with a simulated bloodstone texture as described in any one of claims 1 to 3 includes the following steps: Step 1: Select raw materials for ceramic blanks to prepare brick blanks, wherein the raw materials for ceramic blanks contain rare earth materials that can be synthesized into rare earth fluorescent materials after firing; The chemical composition of the raw materials used for the ceramic blank, by mass percentage, includes: SiO2 63.1–66.3%, Al2O3 18.5–21.4%, K2O 1.4–3.5%, CaO 2.5–3.8%, MgO 0.2–1.9%, Eu2O3 0.6–1.1%, Y2O3 3.9–6.2%, and loss on ignition 4.3–7.2%. Step 2: Spray adhesive onto the brick blank, spraying the adhesive according to the preset pattern area, and apply red frit dry granules. The red frit dry granules contain red rare earth fluorescent material, which absorbs the red frit dry granules that are not adhered to by the adhesive. The raw materials for preparing the red frit dry granules consist of base raw materials and red pigment. By mass percentage, the base raw materials are 100 parts, and the amount of red pigment is 2-4 parts. The chemical composition of the base raw materials, by mass percentage, includes: SiO2 55.8-59 The composition is as follows: 0.2%, Al2O3 15.5-17.6%, K2O 1.6-3.1%, CaO 2.3-3.2%, MgO 0.2-1.8%, ZnO 4.1-6.9%, SnO2 2.1-3.6%, Eu2O3 0.8-1.6%, Y2O3 4.9-7.1%, FeSeO4 3.5-6.1%, and loss on ignition 2.9-5.5%; the red pigment is a mixture of coated red and zirconium iron red, and the mass ratio of coated red to zirconium iron red is 1:1-3. Step 3: Firing, the temperature control process includes: During the preheating stage, the temperature is raised from room temperature to 300℃ at a heating rate of 15-20℃ / min. During the oxidative decomposition stage, the temperature is increased from 300℃ to 950℃ at a heating rate of 25-35℃ / min. In the high-temperature stage, the temperature is increased from 950°C to the maximum firing temperature at a heating rate of 15-20°C / min, wherein the maximum firing temperature is 1165-1225°C. During the heat preservation stage, maintain the highest firing temperature for 5–9 minutes; During the cooling stage, the temperature is reduced from the highest temperature to 600℃ at a cooling rate of 25-30℃ / min, then reduced from 600℃ to 530℃ at a cooling rate of 10-15℃ / min, and then further reduced from 530℃ to 95℃ at a cooling rate of 25-30℃ / min. After exiting the kiln, the temperature is allowed to cool naturally.

5. The preparation process of a fluorescent ceramic tile with a bloodstone-like texture as described in claim 4, characterized in that, Step 21 and / or step 22 are also included between step 2 and step 3; Step 21 is printing, using a known printing process to print a pattern on the brick blank, forming a decorative pattern that is combined with the red frit dry granules; Step 22 involves applying a red translucent protective glaze. The raw materials of the red translucent protective glaze, by mass percentage, have the following chemical composition: SiO2 57.5–59.3%, Al2O3 8.5–11.2%, K2O 2.8–4.5%, ZnO 3.1–5.2%, BaO 7.3–10.5%, FeSeO4 2.1–3.2%, Fe2O3 0.4–0.9%, MgO 2.1–3.6%, and loss on ignition 3.6–6.2%.

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