Ceramic pigment and preparation method thereof

Abstract

The invention discloses a ceramic pigment and a preparation method thereof, and belongs to the field of ceramics, the product is prepared by selecting specific low-cost and environment-friendly preparation raw materials of a non-titanium dioxide system, the processing technology does not need to be changed, and the color system effect the same as that of a titanium-chromium brown material prepared from traditional titanium dioxide system raw materials can be achieved. And compared with a traditional product, the particle size is small, the temperature resistance is better, the tinting strength and the covering power are better when the coloring agent is applied to coloring of ceramic products, and obvious size change cannot be generated.

Description

Technical Field

[0001] The invention relates to the field of ceramics, and in particular to a ceramic colorant and a preparation method thereof. Background Art

[0002] In the field of ceramics, titanium chrome brown is generally preferred as an orange-yellow colorant. This is a composite material composed of oxides of titanium, antimony and chromium. This material has a highly stable rutile lattice and therefore has good weather resistance, chemical resistance and coloring stability. However, traditional titanium chrome brown materials are mostly made from industrial-grade titanium dioxide, which has a high cost and involves a lot of wastewater and waste discharge during the production process, which is less environmentally friendly and has a long production cycle. In addition, the traditional titanium dioxide raw materials used to prepare titanium chrome brown materials have larger particle sizes, resulting in insufficient tinting and hiding power when used in some precision-grade ceramic products. At the same time, these colorants have low temperature resistance, which leads to large changes in product size after being used for ceramic coloring. Additional finishing treatment is required when preparing ceramic components, which increases processing costs. Summary of the invention

[0003] Based on the defects of the prior art, the purpose of the present invention is to provide a ceramic colorant. This product is prepared by using specific low-cost, environmentally friendly raw materials of a non-titanium dioxide system. There is no need to change the processing technology. It can achieve the same color effect as the titanium chrome brown material prepared from traditional titanium dioxide system raw materials. Compared with traditional products, the particle size is smaller and the temperature resistance is better. When used for coloring ceramic products, the tinting power and hiding power are better, and no obvious dimensional changes will occur.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A ceramic colorant, comprising the following raw materials in parts by weight:

[0006] 80-95 parts of rutile ore powder, 4-14 parts of antimony oxide, 1-6 parts of chromium oxide and 0.1-2 parts of mineralizer;

[0007] The rutile ore powder comprises the following components in percentage by mass: 85-95% titanium dioxide, 1-4% silicon oxide, 0.5-2% zirconium oxide, 0.5-2% aluminum oxide, 0.5-2% iron oxide, and the remainder is inevitable impurities or loss on ignition;

[0008] The particle size Dv of the rutile ore powder 50 ≤1.5μm.

[0009] Traditional titanium-chrome brown pigments are obtained by firing a composite of chromium-containing, antimony-containing, and titanium-containing materials as raw materials, and the titanium-containing materials selected are mostly conventional industrial titanium dioxide. Industrial titanium dioxide is mostly prepared by sulfuric acid method or chlorination method, with high purity and good particle uniformity. However, this raw material has a long production cycle and is accompanied by a large amount of waste and waste liquid. When implementing the integrated raw material end colorant preparation process, it is necessary to design additional waste recovery equipment, which has low environmental protection and high production costs. In addition, the titanium-chrome brown pigment prepared from traditional titanium dioxide raw materials always has the problem of large particles. If special size refinement is not performed, it will show insufficient coloring and hiding power when used in some precision-grade ceramic products. In addition, this type of colorant has low temperature resistance, so it will cause a certain fluctuation in product size after the ceramics are colored, and the producer needs to perform subsequent fine finishing on the ceramic products. In order to overcome these problems of traditional titanium dioxide materials in preparing colorants, the technical solution of the present invention uses rutile ore powder containing specific ingredients instead of industrial titanium dioxide as the titanium source, and compounding specific amounts of chromium-containing materials, antimony-containing materials and mineralizers can effectively reduce the synthesis temperature of the product, so that the colorant enters the product, improves the saturation of the colorant, and makes the coloring effect of the prepared ceramic colorant equivalent to that of the titanium chrome brown material prepared by existing industrial titanium dioxide. At the same time, the product also has a smaller particle size, and has better tinting power and covering effect when used for ceramic coloring; in addition, after the product is mixed with the ceramic embryo and the ceramic product is fired, it will basically not affect the size of the product. The product can reach the expected size after firing according to the embryo design without fine finishing. The process operation is simple and the production cost is low.

[0010] Preferably, the rutile ore powder is ball milled.

[0011] More preferably, the particle size Dv of the rutile ore powder is 50 ≤1.2μm.

[0012] More preferably, the particle size Dv of the rutile ore powder is 50 0.8~1.2μm.

[0013] More preferably, the particle size Dv of the rutile ore powder is 50 <1μm

[0014] The inventors have discovered through experiments that, although the raw materials for preparing each product will undergo melting and combination after firing, the particle size of the rutile ore powder will also have a certain influence on the particle size of the ceramic colorant finally prepared. When the size of the rutile ore powder is too large, in addition to affecting the final size of the product, it will also directly affect the coloring effect of the product. When the rutile ore powder within the above preferred range is selected, the size of the prepared product is smaller, and especially when the size is 0.8 to 0.95 μm, the size of the prepared product is small and the coloring effect is almost the same as that of the titanium chrome brown material prepared by the existing titanium dioxide.

[0015] More preferably, the rutile ore powder is pre-treated by the following treatment steps:

[0016] The rutile ore powder is added with water to prepare a slurry, and then a grinding aid and a dispersant are added to perform ball milling to a predetermined particle size.

[0017] More preferably, the mass ratio of the rutile ore powder, the grinding aid and the dispersant is 100:(0.2-0.5):(0.1-0.5).

[0018] More preferably, the grinding aid includes at least one of sodium tripolyphosphate, sodium metasilicate, and sodium hexametaphosphate, and the dispersant includes at least one of polyvinyl pyrrolidone and sodium polyacrylate.

[0019] More preferably, the ball milling treatment lasts for 20 to 30 hours.

[0020] By ball milling in the form of slurry and adding grinding aids and dispersants, the powder particles can be made more dispersible and have a higher size uniformity, and the ceramic pigment obtained after firing has better coloring effect and coloring effect.

[0021] Preferably, the particle size Dv of the antimony oxide is 50 ≤1.5μm, particle size of chromium oxide Dv 50 ≤2.0μm.

[0022] Specifically, the particle size Dv of the antimony oxide is 50 The particle size of chromium oxide is 0.5 to 1.5 μm. 50 1.5~2.0μm.

[0023] Preferably, the ceramic colorant comprises the following raw materials in parts by weight:

[0024] 83-94 parts of rutile ore powder, 5-11 parts of antimony oxide, and 1.5-4 parts of chromium oxide.

[0025] By regulating the raw materials within the above-mentioned preferred range, the ceramic colorant prepared can present different hues based on the different ratios of the three elements of titanium, chromium and antimony in the product, and the hue is almost the same as the hue of the product obtained by regulating the raw materials of the existing titanium dioxide system according to the element ratio.

[0026] Preferably, the mineralizer includes at least one of potassium dichromate, potassium nitrate, cerium oxide and sodium percarbonate.

[0027] More preferably, the mineralizer includes potassium dichromate, potassium nitrate, cerium oxide and sodium percarbonate.

[0028] Another object of the present invention is to provide a method for preparing the ceramic pigment, comprising the following steps:

[0029] The prepared raw materials are mixed and calcined, then crushed and passed through a 250-350 mesh sieve to obtain the ceramic colorant.

[0030] Preferably, the calcination temperature is 1000-1200°C.

[0031] More preferably, the calcination temperature is 1000-1100°C.

[0032] The process operation of preparing the ceramic pigment of the present invention is the same as the traditional titanium dioxide system material preparation process, and does not involve additional operation or special equipment. The operation is simple and can realize industrial-scale production.

[0033] At the same time, the inventors found that at different firing temperatures, the coloring effect of the product is different to a certain extent. This may mainly be due to the differences in the degree of crystallization, crystal form, etc. of the composite oxide at different temperatures, and can be regulated by further introducing grinding aids. On this basis, as the temperature during calcination increases, the particle size of the product will also increase. Therefore, it is preferred to use a processing temperature of 1000-1100°C for product preparation.

[0034] Another object of the present invention is to provide application of the ceramic colorant in the preparation of ceramic products.

[0035] Another object of the present invention is to provide a ceramic product comprising the ceramic colorant of the present invention.

[0036] The coloring effect of the ceramic colorant of the present invention is equivalent to that of the existing titanium-chrome brown colorant of the same type, but rutile-type ore powder with a specific component having a wide source and low production cost is selected as the preparation raw material, so the product production efficiency is higher, and based on the chemical composition of the rutile-type ore powder, the particle size of the product after preparation is smaller, which is more conducive to ceramic coloring. When used in the preparation of ceramic products, the ceramic colorant has almost no effect on the size of the products, and no additional finishing treatment is required after the ceramic products are fired, so the operation process is optimized.

[0037] The beneficial effect of the present invention is that the present invention provides a ceramic colorant, which is prepared by using specific low-cost, environmentally friendly raw materials other than titanium dioxide system, without changing the processing technology, and can achieve the same color effect as titanium chrome brown material prepared by traditional titanium dioxide system raw materials. Compared with traditional products, the particle size is smaller and the temperature resistance is better. When used for coloring ceramic products, the tinting power and hiding power are better, and no obvious dimensional changes will occur. DETAILED DESCRIPTION

[0038] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments and comparative examples, the purpose of which is to understand the content of the present invention in detail, rather than to limit the present invention. All other embodiments obtained by those of ordinary skill in the art without making creative work premise belong to the protection scope of the present invention. The experimental reagents and instruments involved in the implementation of the present invention, unless otherwise specified, are all commonly used common reagents and instruments.

[0039] Example 1

[0040] An embodiment of the ceramic pigment and the preparation method thereof of the present invention,

[0041] The ceramic colorant comprises the following raw materials in parts by weight:

[0042] 83 parts of rutile ore powder, 11 parts of antimony oxide, 4 parts of chromium oxide, 1 part of potassium dichromate, 0.5 parts of potassium nitrate, 0.5 parts of cerium oxide, and 0.2 parts of sodium percarbonate;

[0043] The rutile ore powder used is the ore powder produced by Hainan Shenghe Zirconium Titanium Co., Ltd., including the following chemical components by mass percentage: titanium dioxide (rutile phase) 93%, silicon dioxide 2.2%, zirconium oxide 1.5%, aluminum oxide 1.5%, iron oxide 1% and other inevitable residual impurities; the Dv of the antimony oxide 50 0.9μm, Dv of chromium oxide 50 It is 1.8μm.

[0044] At the same time, the rutile ore powder is also subjected to ball milling treatment, the specific steps of which are:

[0045] The rutile ore powder was added with water to prepare a slurry with a solid content of 67%, and then the grinding aid and dispersant were added according to the mass ratio of rutile ore powder: grinding aid: dispersant = 100:0.4:0.2, and the mixture was ball milled for 30 hours and flash dried to obtain a particle size Dv 50 It is a powder of 0.9 μm;

[0046] The grinding aid is sodium tripolyphosphate, and the dispersant is a mixture of polyvinyl pyrrolidone and sodium polyacrylate in a mass ratio of 1:1.

[0047] The method for preparing the ceramic pigment comprises the following steps:

[0048] The prepared raw materials are mixed and then placed in a tunnel kiln for calcination at 1100° C. for 14 hours. The obtained solid is crushed and passed through a 325-mesh sieve to obtain the ceramic colorant.

[0049] Example 2

[0050] An embodiment of the ceramic pigment and preparation method thereof of the present invention is different from embodiment 1 only in that when the rutile ore powder is ball-milled, the rutile ore powder: the grinding aid: the dispersant is mixed in a mass ratio of 100:0.2:0.2, and the Dv of the rutile ore powder obtained after ball milling is 50 It is 1.2μm.

[0051] Example 3

[0052] An embodiment of the ceramic pigment and preparation method thereof of the present invention is different from embodiment 1 only in that when the rutile ore powder is ball-milled, the rutile ore powder: the grinding aid: the dispersant is mixed in a mass ratio of 100:0.3:0.2, and the Dv of the rutile ore powder obtained after ball milling is 50 1μm.

[0053] Example 4

[0054] An embodiment of the ceramic pigment and preparation method thereof of the present invention is different from embodiment 1 only in that:

[0055] The ceramic colorant comprises the following raw materials in parts by weight:

[0056] 83 parts of rutile ore powder, 11 parts of antimony oxide, 4 parts of chromium oxide, and 1 part of potassium dichromate;

[0057] The method for preparing the ceramic pigment comprises the following steps:

[0058] The prepared raw materials were mixed and then placed in a tunnel kiln for calcination at 1150° C. for 14 hours. The obtained solid was crushed and passed through a 325-mesh sieve to obtain the ceramic colorant.

[0059] Example 5

[0060] An embodiment of the ceramic pigment and preparation method thereof of the present invention is different from embodiment 1 only in that:

[0061] The ceramic colorant comprises the following raw materials in parts by weight:

[0062] 83 parts of rutile ore powder, 11 parts of antimony oxide, 4 parts of chromium oxide, and 1 part of potassium dichromate;

[0063] The method for preparing the ceramic pigment comprises the following steps:

[0064] The prepared raw materials are mixed and then placed in a tunnel kiln for calcination at 1100° C. for 14 hours. The obtained solid is crushed and passed through a 325-mesh sieve to obtain the ceramic colorant.

[0065] Example 6

[0066] An embodiment of the ceramic pigment and preparation method thereof of the present invention is different from embodiment 1 only in that:

[0067] The ceramic colorant comprises the following raw materials in parts by weight:

[0068] 89 parts of rutile ore powder, 8 parts of antimony oxide, 2.5 parts of chromium oxide, 1 part of potassium dichromate, 0.5 parts of potassium nitrate, and 0.5 parts of cerium oxide.

[0069] Example 7

[0070] An embodiment of the ceramic pigment and preparation method thereof of the present invention is different from embodiment 1 only in that:

[0071] The ceramic colorant comprises the following raw materials in parts by weight:

[0072] 94 parts of rutile ore powder, 5 parts of antimony oxide, 1.5 parts of chromium oxide, 0.5 parts of potassium dichromate, and 0.5 parts of cerium oxide.

[0073] Example 8

[0074] An embodiment of the ceramic pigment and preparation method thereof of the present invention is different from embodiment 1 only in that:

[0075] The rutile ore powder used is the ore powder produced by Hainan Shenghe Zirconium Titanium Production, including the following chemical components in percentage by mass: titanium dioxide (rutile phase) 90%, silicon dioxide 3.5%, zirconium oxide 1.6%, aluminum oxide 1.5%, iron oxide 1.5% and other inevitable residual impurities.

[0076] Comparative Example 1

[0077] A ceramic pigment and a preparation method thereof, the difference from Example 1 is that the ceramic pigment comprises the following preparation raw materials in parts by weight:

[0078] 83 parts of titanium dioxide, 11 parts of antimony oxide, 4 parts of chromium oxide, 1 part of potassium dichromate, 0.5 parts of potassium nitrate, 0.5 parts of cerium oxide, and 0.2 parts of sodium percarbonate;

[0079] The titanium dioxide is rutile industrial titanium dioxide with a purity of more than 99% and a particle size of Dv 50 It is 0.9μm.

[0080] Comparative Example 2

[0081] A ceramic pigment and a preparation method thereof, the difference from Example 6 is that the ceramic pigment comprises the following preparation raw materials in parts by weight:

[0082] 89 parts of titanium dioxide, 8 parts of antimony oxide, 2.5 parts of chromium oxide, 1 part of potassium dichromate, 0.5 parts of potassium nitrate, and 0.5 parts of cerium oxide;

[0083] The titanium dioxide is rutile industrial titanium dioxide with a purity of more than 99% and a particle size of Dv 50 It is 0.9μm.

[0084] Comparative Example 3

[0085] A ceramic pigment and a preparation method thereof, the difference from Example 7 is that the ceramic pigment comprises the following preparation raw materials in parts by weight:

[0086] 94 parts of titanium dioxide, 5 parts of antimony oxide, 1.5 parts of chromium oxide, 0.5 parts of potassium dichromate, and 0.5 parts of cerium oxide;

[0087] The titanium dioxide is rutile industrial titanium dioxide with a purity of more than 99% and a particle size of Dv 50 It is 0.9μm.

[0088] Comparative Example 4

[0089] A ceramic pigment and a preparation method thereof, the difference from Example 1 is that when the rutile ore powder is ball-milled, the rutile ore powder: the grinding aid: the dispersant is mixed in a mass ratio of 100:0.05:0.2, and the Dv of the rutile ore powder obtained after ball milling is 50 It is 1.6μm.

[0090] Comparative Example 5

[0091] A ceramic colorant and a preparation method thereof, the only difference from Example 1 is that the rutile ore powder used is the ore powder produced by Hainan Shenghe Zirconium Titanium, including the following chemical components in percentage by mass: 84% titanium dioxide (rutile phase), 5.5% silicon dioxide, 2.5% zirconium oxide, 2.2% aluminum oxide, 3.8% iron oxide and other inevitable residual impurities.

[0092] Effect Example 1

[0093] In order to verify the coloring effect of the ceramic colorant of the present invention, according to the requirements of "JC / T 1046.2-2007 Color Glazes for Building Sanitary Ceramics Part 2: Color Glazes for Building Sanitary Ceramics", the ceramic colorants obtained in each embodiment or comparative example were mixed into a standard test blank at a mass content of 2%, ground evenly with water and dried, and then pressed into a test piece with a thickness of 5 mm and a diameter of 60 mm using a small-sized green sheet press. The test piece was placed in a furnace at 1200° C. and fired into a test ceramic product. The chromaticity test results were measured by a CM-2300d spectrophotometer (Konica Minolta, Japan) as shown in Table 1, wherein the CIE L*a*b* (CIELAB) color model is composed of three elements of brightness L* and a* and b* of the relevant color. L* represents brightness, with a value range from 0 to 100, where smaller values ​​represent higher blackness; a* represents the range from red to green, with negative values ​​indicating green and positive values ​​indicating magenta; b* represents the range from yellow to blue, with negative values ​​indicating blue and positive values ​​indicating yellow.

[0094] Table 1

[0095] product L* a* b* Example 1 62.48 12.95 35.33 Example 2 61.23 13.23 32.28 Example 3 61.57 13.02 32.89 Example 4 63.57 12.55 34.64 Example 5 64.99 11.43 33.52 Example 6 65.21 9.18 35.35 Example 7 67.22 5.42 29.24 Example 8 61.98 12.84 34.99 Comparative Example 1 62.69 12.91 35.66 Comparative Example 2 65.32 9.13 33.82 Comparative Example 3 67.55 5.52 29.54 Comparative Example 4 60.56 10.89 30.66 Comparative Example 5 59.23 10.23 28.65

[0096] It can be clearly seen from the test results that the coloring effects of the products are different based on the different proportions of titanium, chromium and antimony elements in the prepared ceramic colorants, but the coloring effects of the products of each embodiment within the same proportion range are basically equivalent to the effects of the products of Comparative Examples 1 to 3 prepared using titanium dioxide. In terms of coloring effects, the products of each embodiment can be completely used to replace similar existing colorant products described in Comparative Examples 1 to 3.

[0097] It can be seen from Examples 1 to 3 and Comparative Example 4 that the rutile ore powder selected when preparing the ceramic colorant of the present invention has different particle sizes based on the different amounts of grinding aids introduced during ball milling. When the particle size is too large, the color development activity of the prepared product is poor, and the color development effect of the product cannot reach that of existing products.

[0098] It can be seen from Example 1 and Examples 4 to 5 that the coloring effect of the product can also be regulated based on the addition of the mineralizer and the regulation of the calcination temperature. Among them, the coloring effect of the product with the same element ratio prepared by selecting a mineralizer compounded with potassium dichromate, potassium nitrate, cerium oxide and sodium percarbonate is closer to the product of Comparative Example 1 prepared from the existing titanium dioxide.

[0099] It can be seen from Example 1, Example 8 and Comparative Example 5 that in the ceramic colorant of the present invention, the type of rutile ore powder selected to replace titanium dioxide cannot be arbitrarily selected, otherwise the coloring effect of existing products may not be achieved.

[0100] Effect Example 2

[0101] In order to verify the application effect of the ceramic pigment of the present invention, the products obtained in each embodiment and comparative example were tested for particle size distribution using a Malvern 3000 particle size analyzer. The results are shown in Table 2. At the same time, a test ceramic sheet was prepared according to the same method as Example 1. A blank control (i.e., no ceramic pigment was added) was set during the preparation. After the preparation was completed, the diameter of each product was measured using a vernier caliper. The results are shown in Table 3.

[0102] Table 2

[0103] product <![CDATA[Dv 10 (μm)]]> <![CDATA[Dv 50 (μm)]]> <![CDATA[Dv 90 (μm)]]> Example 1 0.50 1.13 1.78 Example 2 0.61 1.38 2.54 Example 3 0.55 1.23 2.10 Example 4 0.56 1.19 1.90 Example 5 0.49 1.10 1.73 Example 6 0.48 1.02 1.63 Example 7 0.47 0.98 1.60 Example 8 0.52 1.15 1.80 Comparative Example 1 1.16 2.28 3.72 Comparative Example 2 0.78 1.90 3.28 Comparative Example 3 0.68 1.87 3.20 Comparative Example 4 0.75 1.92 3.11 Comparative Example 5 0.58 1.20 1.77

[0104] Table 3

[0105]

[0106]

[0107] It can be clearly seen from the test results that, under the conditions of similar element ratios and similar coloring effects, the particle sizes of the products of Examples 1 and 6-7 are obviously smaller than those of the products of Comparative Examples 1-3. Therefore, when applied to some fine-grade ceramic products, they can exhibit better tinting strength and hiding power. At the same time, the product will basically have no effect on the size of the final ceramic product when applied. The test samples prepared from the products of Comparative Examples 1-3 prepared with existing titanium dioxide have increased sizes compared to the blank control, indicating that the existing ceramic colorants have low temperature resistance, which in turn affects the size of the final product when used to prepare ceramic products.

[0108] According to Examples 1 to 3 and Comparative Example 4, it can be seen that the size of the rutile ore powder selected during preparation will affect the size of the final ceramic colorant. The smaller the particle size of the rutile ore powder, the smaller the size of the product. At the same time, according to Examples 1, 4 and 5, it can be seen that the choice of calcination temperature will also affect the particle size of the product. When the calcination temperature exceeds 1100°C, the particle size of the product will also be improved to a certain extent. In addition, according to Example 1 and Comparative Example 5, it can be seen that the ceramic colorant prepared from rutile ore powder of a composition not specified by the present invention cannot take into account the effects of small particle size and temperature resistance.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A ceramic colorant, characterized in that: The preparation comprises the following raw materials in parts by weight: 80-95 parts of rutile ore powder, 4-14 parts of antimony oxide, 1-6 parts of chromium oxide and 0.1-2 parts of mineralizer; The rutile ore powder comprises the following components in percentage by mass: 85-95% titanium dioxide, 1-4% silicon oxide, 0.5-2% zirconium oxide, 0.5-2% aluminum oxide, 0.5-2% iron oxide, and the remainder is inevitable impurities or loss on ignition; The particle size Dv of the rutile ore powder 50 ≤1.5μm.

2. The ceramic pigment according to claim 1, characterized in that: The rutile ore powder is ball-milled.

3. The ceramic pigment according to claim 1, characterized in that: The particle size Dv of the rutile ore powder 50 ≤1.2μm; preferably, the particle size Dv of the rutile ore powder 50 0.8~1.2μm.

4. The ceramic pigment according to claim 1, characterized in that: The rutile ore powder is pre-processed by the following processing steps: The rutile ore powder is added with water to prepare a slurry, and then a grinding aid and a dispersant are added to perform ball milling to a predetermined particle size.

5. The ceramic pigment according to claim 4, characterized in that: The mass ratio of the rutile ore powder, the grinding aid and the dispersant is 100:(0.2-0.5):(0.1-0.5).

6. The ceramic pigment according to claim 5, characterized in that: The grinding aid includes at least one of sodium tripolyphosphate, sodium metasilicate and sodium hexametaphosphate, and the dispersant includes at least one of polyvinyl pyrrolidone and sodium polyacrylate.

7. The ceramic pigment according to claim 1, characterized in that: The particle size Dv of the antimony oxide 50 ≤1.5μm, particle size of chromium oxide Dv 50 ≤2.0μm.

8. The ceramic pigment according to claim 1, characterized in that: The mineralizer includes at least one of potassium dichromate, potassium nitrate, cerium oxide and sodium percarbonate.

9. The method for preparing a ceramic pigment according to any one of claims 1 to 8, characterized in that: The following steps are involved: The prepared raw materials are mixed and calcined, and then crushed and passed through a 250-350 mesh sieve to obtain the ceramic colorant; preferably, the calcination temperature is 1000-1200°C.

10. A ceramic product comprising the ceramic colorant according to any one of claims 1 to 8.

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