An artistic glaze and its preparation method

Abstract

This application relates to the field of ceramic technology, and particularly to an artistic glaze and a preparation method thereof. The raw materials include the following parts by mass: 25-35 parts of potassium feldspar, 25-35 parts of quartz powder, 1-3 parts of kaolin, 4-8 parts of alumina, 10-15 parts of calcite, 4-8 parts of wollastonite, 3-6 parts of zinc oxide, 4-9 parts of frit, 2-5 parts of talc powder, 0.3-0.7 parts of blue pigment, and 0.1-0.2 parts of yellow pigment. By precisely controlling the particle size distribution of the raw materials, the density and wear resistance of the antibacterial glaze surface are improved. It is fired under reducing atmosphere conditions, and the obtained artistic glaze surface is smooth and flat. The prepared glaze surface is smooth and flat, forming a retro feeling, presenting colors such as cyan and plum green, and is suitable for industrial mass production.

Description

Technical Field

[0001] This application relates to the field of ceramic technology, and particularly to an artistic glaze and a preparation method thereof. Background Art

[0002] Sanitary ceramics are glazed ceramic products used in places such as bathrooms, kitchens, and laboratories, including washbasins, water tanks, sinks, bathtubs, soap boxes, and dressing table boards. Currently, sanitary ceramics are mainly white, which cannot meet the needs of consumers for diversified experiences. Sanitary ceramics with bright colors, delicate, smooth, and hygienic surfaces are favored by young people. Summary of the Invention

[0003] The purpose of this application is to provide an artistic glaze for sanitary ceramics with bright colors, delicate, and smooth surfaces and a preparation method thereof. By precisely controlling the particle size distribution of raw materials, the density and fineness of the antibacterial glaze surface are improved. At the same time, inorganic pigments are added, and the resulting ceramic glaze surface has bright colors, presenting colors such as cyan-white and plum-bluish.

[0004] To achieve the above purpose, this application provides the following technical solutions:

[0005] An artistic glaze, comprising the following raw materials in parts by mass: 25 - 35 parts of potassium feldspar, 25 - 35 parts of quartz powder, 1 - 3 parts of kaolin, 4 - 8 parts of alumina, 10 - 15 parts of calcite, 4 - 8 parts of wollastonite, 3 - 6 parts of zinc oxide, 4 - 9 parts of frit, 2 - 5 parts of talc powder, 0.3 - 0.7 part of blue pigment, 0.1 - 0.2 part of yellow pigment. The particle size distribution of the potassium feldspar, the quartz powder, the kaolin, the alumina, the calcite, the wollastonite, the zinc oxide, the frit, and the talc powder is 7 - 10% for 325 mesh - 625 mesh, 10 - 15% for 625 - 1250 mesh, and 75% - 83% for less than 1250 mesh. The particle size of the blue pigment is 8 - 12 μm, and the particle size of the yellow pigment is 13 - 16 μm.

[0006] Preferably, an artistic glaze, comprising the following raw materials in parts by mass: 29 - 31 parts of potassium feldspar, 29 - 31 parts of quartz powder, 1 - 3 parts of kaolin, 4 - 6 parts of alumina, 11 - 13 parts of calcite, 5 - 7 parts of wollastonite, 3 - 4 parts of zinc oxide, 6 - 8 parts of frit, 2 - 3 parts of talc powder, 0.3 - 0.5 part of blue pigment, 0.13 - 0.16 part of yellow pigment. The particle size distribution of the potassium feldspar, the quartz powder, the kaolin, the alumina, the calcite, the wollastonite, the zinc oxide, the frit, and the talc powder is 8 - 9% for 325 mesh - 625 mesh, 12 - 13% for 625 - 1250 mesh, and 78% - 80% for less than 1250 mesh. The particle size of the blue pigment is 8 - 12 μm, and the particle size of the yellow pigment is 13 - 16 μm.

[0007] By adopting the above technical solution, through precise control of the particle size distribution of raw materials, the density of the glaze layer surface is improved, thereby enhancing its strength. Potassium feldspar contains potassium and sodium and acts as a flux, which can shorten the firing time, increase the light transmittance of the glaze layer, and improve the bonding force between the green body and the glaze layer. Calcite mainly acts as a flux, which can increase the hardness, wear resistance and corrosion resistance of the glaze, reduce the melting temperature of the glaze material, increase the gloss and transparency of the glaze color, and prevent glaze cracking and accumulation; quartz can increase the melting temperature and viscosity of the glaze, widen the melting temperature range, reduce the fluidity of the glaze, reduce the expansion coefficient of the glaze, and improve the mechanical strength, hardness, wear resistance and chemical corrosion resistance of the glaze. Moreover, quartz can be melted by more fusible substances such as CaO, Na2O, K2O, and MgO to form transparent quartz glass, making the glaze surface bright and increasing the gloss. The role of alumina is to increase the heat resistance temperature of the formula system, and the role of zinc oxide is to increase the melting performance of the material.

[0008] Preferably, the blue pigment is a mixture composed of cobalt oxide and vanadium zirconium blue in a mass percentage of 2:1-4.

[0009] Preferably, the yellow pigment is a mixture composed of ferrous oxalate and copper oxalate in a mass percentage of 1:3-6.

[0010] By adopting the above technical solution, the coloring agents of ferrous oxalate and copper oxalate contain Cu and Fe elements and are fired in a reducing atmosphere. Fe2 + , Cu 2+ are the main color-forming ions. Cobalt oxide shows a pure turquoise blue color after reacting with Al 2 O 3 , shows a sky blue color after reacting with MgO and SiO 2 , shows a dark blue color when reacting with SiO 2 alone, shows a green color when reacting with ZnO. Vanadium zirconium blue: A sky blue high-temperature pigment for ceramic colorants. It can be used in architectural sanitary ceramic glazes, can also be used for underglaze decoration, or as a body colorant. Vanadium zirconium blue has excellent adaptability to glaze materials.

[0011] A preparation method of an artistic glaze material uses the raw materials of the above-mentioned artistic glaze material, and its preparation method includes the following steps:

[0012] S1 Mixing materials: Screen, weigh and mix potassium feldspar, quartz powder, kaolin, alumina, calcite, wollastonite, zinc oxide, frit, talc powder, blue pigment and yellow pigment evenly according to the formula ratio to obtain the glaze material;

[0013] S2 Preparing glaze slurry: Put the glaze material into a stirring device and add water to stir and mix to obtain the glaze slurry;

[0014] S3 Glazing: Spray the obtained glaze slurry onto the surface of the green body to obtain a glazed product with a glaze layer thickness of 0.2 - 0.4 mm;

[0015] S4 Firing: After drying the glazed product at 130 °C, load it into a kiln and fire it under a reducing atmosphere, then naturally cool it to room temperature to obtain an artistic glaze ceramic product.

[0016] Preferably, in step S2 of preparing the glaze slurry, the performance parameters of the glaze slurry are: specific gravity of 1.600 kg / L - 1.700 kg / L, fluidity of 100 mL, and the flow time of the glaze slurry is 80 - 100 seconds.

[0017] Preferably, the green body is a ceramic product with a white glaze layer that has been sprayed and the surface layer is well-dried.

[0018] Preferably, in step S4 of firing, the firing includes: after loading into the kiln, the heating rate is 120 °C / hour, the firing temperature is 1220 - 1240 °C, the firing time is 60 - 120 minutes, and an artistic glaze ceramic product is fired.

[0019] Preferably, in step S4 of firing, the reducing atmosphere is carbon monoxide, and the volume concentration of carbon monoxide is 5 - 8%.

[0020] By adopting the above technical solution, the obtained glaze slurry is sprayed onto the surface of the green body that has just been dried. The glaze layer is integrated with the matrix ceramic layer, and the bonding force is very strong. At the same time, they are sintered together, saving a large amount of energy.

[0021] In summary, the beneficial technical effects of this application are:

[0022] 1) By precisely controlling the particle size distribution of the raw materials in this application, the density of the glaze surface is improved, the hardness and wear resistance of the artistic ceramic glaze surface are enhanced, and it is not easy to fade.

[0023] 2) By scientifically selecting the pigment raw materials in this application and firing under the condition of a reducing atmosphere, the fired glaze surface is smooth and flat, forming a retro feeling, presenting colors such as blue-white and plum-bluish, and is suitable for industrial mass production. Detailed Embodiments

[0024] The following will describe the implementation solutions of this application in detail in combination with examples and preparation examples. However, those skilled in the art will understand that the following examples are only used to illustrate this application and should not be regarded as limiting the scope of this application. For those not specified in the examples, they are carried out according to the conventional conditions or the conditions recommended by the manufacturer. For the reagents or instruments not specified by the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0025] Example 1

[0026] An artistic glaze, comprising raw materials in the following parts by mass: 25 kg of potassium feldspar, 25 kg of quartz powder, 1 kg of kaolin, 4 kg of alumina, 10 kg of calcite, 4 kg of wollastonite, 3 kg of zinc oxide, 4 kg of frit, 2 kg of talc powder, 0.3 kg of blue pigment, 0.1 kg of yellow pigment. The particle size distribution of the potassium feldspar, the quartz powder, the kaolin, the alumina, the calcite, the wollastonite, the zinc oxide, the frit, and the talc powder is 7% for 325 mesh - 625 mesh, 10% for 625 - 1250 mesh, and 7% for less than 1250 mesh. The particle size of the blue pigment is 8 - 12 μm, and the particle size of the yellow pigment is 13 - 16 μm. The blue pigment is a mixture composed of cobalt oxide and vanadium zirconium blue in a mass percentage of 2:1, and the yellow pigment is a mixture composed of ferrous oxalate and copper oxalate in a mass percentage of 1:3.

[0027] Example 2

[0028] An artistic glaze, comprising raw materials in the following parts by mass: 35 kg of potassium feldspar, 35 kg of quartz powder, 3 kg of kaolin, 8 kg of alumina, 15 kg of calcite, 8 kg of wollastonite, 6 kg of zinc oxide, 9 kg of frit, 5 kg of talc powder, 0.7 kg of blue pigment, 0.2 kg of yellow pigment. The particle size distribution of the potassium feldspar, the quartz powder, the kaolin, the alumina, the calcite, the wollastonite, the zinc oxide, the frit, and the talc powder is 10% for 325 mesh - 625 mesh, 15% for 625 - 1250 mesh, and 83% for less than 1250 mesh. The particle size of the blue pigment is 8 - 12 μm, and the particle size of the yellow pigment is 13 - 16 μm. The blue pigment is a mixture composed of cobalt oxide and vanadium zirconium blue in a mass percentage of 2:4, and the yellow pigment is a mixture composed of ferrous oxalate and copper oxalate in a mass percentage of 1:6.

[0029] Example 3

[0030] An artistic glaze, comprising raw materials in the following parts by mass: 30 kg of potassium feldspar, 30 kg of quartz powder, 2 kg of kaolin, 6 kg of alumina, 12 kg of calcite, 7 kg of wollastonite, 4 kg of zinc oxide, 6 kg of frit, 3 kg of talc powder, 0.5 kg of blue pigment, and 0.15 kg of yellow pigment. The particle size distribution of the potassium feldspar, the quartz powder, the kaolin, the alumina, the calcite, the wollastonite, the zinc oxide, the frit, and the talc powder is 9% for 325 mesh - 625 mesh, 11% for 625 - 1250 mesh, and 80% for less than 1250 mesh. The particle size of the blue pigment is 8 - 12 μm, and the particle size of the yellow pigment is 13 - 16 μm. The blue pigment is a mixture composed of cobalt oxide and vanadium zirconium blue in a mass percentage of 2:3, and the yellow pigment is a mixture composed of ferrous oxalate and copper oxalate in a mass percentage of 1:5.

[0031] Comparative Example 1

[0032] Same as Example 3, except that: the particle size distribution of the potassium feldspar, the quartz powder, the kaolin, the alumina, the calcite, the wollastonite, the zinc oxide, the frit, and the talc powder is 89% for 325 mesh - 625 mesh and 11% for 625 - 1250 mesh.

[0033] Preparation Example 1

[0034] A preparation method of an artistic glaze, using the raw materials of Example 1, and the preparation method comprises the following steps:

[0035] S1 Mixing: Screen, weigh, and uniformly mix potassium feldspar, quartz powder, kaolin, alumina, calcite, wollastonite, zinc oxide, frit, talc powder, blue pigment, and yellow pigment according to the formula ratio to obtain the glaze;

[0036] S2 Glaze Slurry Preparation: Put the glaze into a stirring device, add water and stir to mix, to obtain a glaze slurry. The performance parameters of the glaze slurry are: specific gravity is 1.600 kg / L, and fluidity is that 100 mL of the glaze slurry flows for 100 seconds.

[0037] S3 Glazing: Spray the obtained glaze slurry onto the surface of the ceramic product with a well - sprayed white glaze layer and a dried surface layer, to obtain a glazed product with a glaze layer thickness of 0.4 mm;

[0038] S4 Firing: After drying the glazed product at 130 °C, load it into a kiln. The heating rate is 120 °C / hour, the firing temperature is 1240 °C, and the firing time is 120 minutes to fire into an artistic glaze ceramic product. Fire under the condition of a reducing gas carbon monoxide with a volume concentration of 8%, and cool naturally to room temperature to obtain an artistic glaze ceramic product.

[0039] Preparation Example 2

[0040] A preparation method of an artistic glaze, using the raw materials of Example 2, and its preparation method includes the following steps:

[0041] S1 Mixing: Screen, weigh and mix potassium feldspar, quartz powder, kaolin, alumina, calcite, wollastonite, zinc oxide, frit, talc powder, blue pigment and yellow pigment evenly according to the formula ratio to obtain the glaze;

[0042] S2 Glaze slurry preparation: Put the glaze into a stirring device and add water to stir and mix to obtain a glaze slurry. The performance parameters of the glaze slurry are: specific gravity is 1.700 kg / L, fluidity is 100 mL, and the flow time of the glaze slurry is 80 seconds.

[0043] S3 Glazing: Spray the obtained glaze slurry onto the surface of the ceramic product with a dried surface layer that has been sprayed with white glaze, and obtain a glazed product with a glaze layer thickness of 0.2 mm;

[0044] S4 Firing: After drying the glazed product at 130 °C, load it into a kiln. The heating rate is 120 °C / hour, the firing temperature is 1220 °C, and the firing time is 60 minutes to fire the artistic glaze ceramic product. Fire under the condition of reducing gas carbon monoxide with a volume concentration of 5%, and cool naturally to room temperature to obtain the artistic glaze ceramic product.

[0045] Preparation Example 3

[0046] A preparation method of an artistic glaze, using the raw materials of Example 3, and its preparation method includes the following steps:

[0047] S1 Mixing: Screen, weigh and mix potassium feldspar, quartz powder, kaolin, alumina, calcite, wollastonite, zinc oxide, frit, talc powder, blue pigment and yellow pigment evenly according to the formula ratio to obtain the glaze;

[0048] S2 Glaze slurry preparation: Put the glaze into a stirring device and add water to stir and mix to obtain a glaze slurry. The performance parameters of the glaze slurry are: specific gravity is 1.650 kg / L, fluidity is 100 mL, and the flow time of the glaze slurry is 90 seconds.

[0049] S3 Glazing: Spray the obtained glaze slurry onto the surface of the ceramic product with a dried surface layer that has been sprayed with white glaze, and obtain a glazed product with a glaze layer thickness of 0.3 mm;

[0050] S4 Firing: After drying the glazed product at 130 °C, load it into a kiln. The heating rate is 120 °C / hour, the firing temperature is 1230 °C, and the firing time is 90 minutes to fire the artistic glaze ceramic product. Fire under the condition of reducing gas carbon monoxide with a volume concentration of 7%, and cool naturally to room temperature to obtain the artistic glaze ceramic product.

[0051] Preparation Example 4

[0052] Same as Preparation Example 3, except that the materials in Comparative Example 1 were used.

[0053] Performance Test

[0054] Samples were taken from the artistic glaze ceramic products in Preparation Examples 1-4 and tested. The test results are shown in Table 1.

[0055] Ease of cleaning: Using the detection method of GB / T 31859-2015, A < 0.5 g / cm 2 , belonging to easy-to-clean ceramics.

[0056] Strength: Determined in accordance with the standard of GB / T 8488-2008 "Test Method for Compressive Strength of Ceramic Products".

[0057] Hardness: Using the test method of GB / T 3197-82.

[0058] Glossiness: The glossiness of the ceramic was measured by using a glossmeter to test each sample piece under the geometric condition of 60°. The instrument emits a beam of light, irradiates on the ceramic surface, measures the amount of reflected light, and then displays the result in the form of a value. Generally speaking, the higher the value, the better the glossiness.

[0059] Table 1

[0060] Hardness / Hv <![CDATA[Ease of cleaning g / cm 3 / ]]> Strength / MPa Glossiness / ° Preparation Example 1 683 0.12 95 96 Preparation Example 2 679 0.23 82 94 Preparation Example 3 698 0.10 89 99 Preparation Example 4 658 0.52 68 90

[0061] From the analysis of Preparation Example 4, the particle size of the raw materials is larger than that of Preparation Example 3, and the ease of cleaning of the surface of the obtained artistic glaze ceramic products is poor. This is mainly because the particle size of the raw materials is large, and the compactness of the glaze layer obtained after spraying is poor, with pores, so it is not easy to clean. Its hardness drops from 698 Hv to 698 Hv, the strength drops from 89 MPa to 68 MPa, and the glossiness drops from 99 to 90.

[0062] The antibacterial glaze ceramic products obtained in Preparation Examples 1-4 were tested in accordance with GB 6566-2010 "Limits of Radionuclides in Building Materials". The results show that the internal and external exposure indexes meet the requirements of Class A decorative and finishing materials in the GB 6566-2010 standard.

[0063] The surfaces of the artistic glaze ceramic products obtained in Preparation Examples 1-3 are wear-resistant, with bright and shiny gloss, bright colors, and are beautiful.

[0064] The above embodiments and preparation examples are only used to explain the technical solutions of the present invention rather than limit it. Although the above embodiments have specifically described the present invention, those skilled in the art should understand that the specific implementation manners of the present invention can still be modified or equivalently replaced. Any modification and equivalent replacement without departing from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims

1. An artistic glaze, characterized in that, it comprises raw materials in the following parts by mass: 25-35 parts of potassium feldspar, 25-35 parts of quartz powder, 1-3 parts of kaolin, 4-8 parts of alumina, 10-15 parts of calcite, 4-8 parts of wollastonite, 3-6 parts of zinc oxide, 4-9 parts of frit, 2-5 parts of talc powder, 0.3-0.7 part of blue pigment, 0.1-0.2 part of yellow pigment. The particle size distribution of the potassium feldspar, the quartz powder, the kaolin, the alumina, the calcite, the wollastonite, the zinc oxide, the frit, and the talc powder is 7-10% for 325 mesh - 625 mesh, 10-15% for 625 - 1250 mesh, and 75% - 83% for less than 1250 mesh. The particle size of the blue pigment is 8-12 μm, and the particle size of the yellow pigment is 13-16 μm. The blue pigment is a mixture composed of cobalt oxide and vanadium zirconium blue in a mass percentage of 2:1 - 4, and the yellow pigment is a mixture composed of ferrous oxalate and copper oxalate in a mass percentage of 1:3 - 6.

2. The artistic glaze according to claim 1, characterized in that, it comprises raw materials in the following parts by mass: 29-31 parts of potassium feldspar, 29-31 parts of quartz powder, 1-3 parts of kaolin, 4-6 parts of alumina, 11-13 parts of calcite, 5-7 parts of wollastonite, 3-4 parts of zinc oxide, 6-8 parts of frit, 2-3 parts of talc powder, 0.3-0.5 part of blue pigment, 0.13-0.16 part of yellow pigment. The particle size distribution of the potassium feldspar, the quartz powder, the kaolin, the alumina, the calcite, the wollastonite, the zinc oxide, the frit, and the talc powder is 8-9% for 325 mesh - 625 mesh, 12-13% for 625 - 1250 mesh, and 78% - 80% for less than 1250 mesh. The particle size of the blue pigment is 8-12 μm, and the particle size of the yellow pigment is 13-16 μm. The blue pigment is a mixture composed of cobalt oxide and vanadium zirconium blue in a mass percentage of 2:1 - 4, and the yellow pigment is a mixture composed of ferrous oxalate and copper oxalate in a mass percentage of 1:3 - 6.

3. A preparation method of an artistic glaze, characterized in that, using the raw materials of the artistic glaze according to any one of claims 1-2, and its preparation method comprises the following steps: S1 Mixing materials: Screening, weighing and uniformly mixing potassium feldspar, quartz powder, kaolin, alumina, calcite, wollastonite, zinc oxide, frit, talc powder, blue pigment and yellow pigment according to the formula ratio to obtain glaze; S2 Preparing glaze slurry: Putting the glaze into a stirring device and adding water for stirring and mixing to obtain glaze slurry; S3 Glazing: Spraying the obtained glaze slurry onto the surface of the green body to obtain a glazed product with a glaze layer thickness of 0.2-0.4 mm; S4 Firing: After drying the glazed product at 130°C, loading it into a kiln and firing it under a reducing atmosphere, and naturally cooling it to room temperature to obtain an artistic glaze ceramic product.

4. The preparation method of an artistic glaze according to claim 3, characterized in that, In step S2 of preparing the glaze slurry, the performance parameters of the glaze slurry are as follows: the specific gravity is 1.600 kg / L - 1.700 kg / L, and the fluidity is that the flow time of 100 mL of the glaze slurry is 80 - 100 seconds.

5. The method for preparing an artistic glaze according to claim 3, characterized in that the green body is a ceramic product with a white glaze sprayed on it and the surface layer dried well.

6. The method for preparing an artistic glaze according to claim 3, characterized in that in step S4 of firing, the firing includes: after loading into the kiln, the heating rate is 120 °C / hour, the firing temperature is 1220 - 1240 °C, and the firing time is 60 - 120 minutes to fire the artistic glaze ceramic product.

7. The method for preparing an artistic glaze according to claim 3, characterized in that in step S4 of firing, the reducing atmosphere is carbon monoxide, and the volume concentration of carbon monoxide is 5 - 8%.