Watermelon crackle glaze with crackle effect and preparation method thereof

Abstract

The invention discloses a watermelon crackle glaze with a crackle effect and a preparation method thereof. The watermelon crackle glaze comprises a base glaze and a surface glaze; calculated by weight, the base glaze comprises 60-66 parts of SiO2, 12-14 parts of Al2O3, 2-3 parts of K2O, 0.5-1 parts of Na2O, 9-13 parts of CaO, 4-6 parts of MgO, 1-2.5 parts of Li2O, 3.5 parts of BaO and 8-10 parts of dark green colorant; the surface glaze comprises 48-51 parts of SiO2, 15-18 parts of Al2O3, 1.5-2.5 parts of K2O, 2.5-3.5 parts of Na2O, CaO5 The method comprises the following steps: S1, weighing the components of the ground glaze and the top glaze according to the formula, adding water and grinding them; S2, spraying the ground glaze and the top glaze on the surface of the bisque-fired body in sequence by the steps of glazing, glue painting, glaze spraying, glue removal and re-glazing; S3, drying the bisque-fired body after spraying the glaze, placing it in a kiln, adopting a firing cycle of 8-12 hours, controlling the maximum sintering temperature at 1230-1260℃, and slowly cooling it out of the kiln after firing to obtain a watermelon crackle glaze with a crackle effect.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic materials, and in particular to a watermelon crackle glaze with a crack effect and a preparation method thereof. Background Art

[0002] Traditional crackle glaze, such as those produced by Ge Kiln and Guan Kiln, features a glaze with realistic cracks, the length and distribution of which are random. This crackle glaze, like those found in products from Ge Kiln and Guan Kiln, exhibits cracks after sintering. This results in a loose bond between the glaze and the base, making it susceptible to peeling or shedding. The resulting crackle-like sound when struck is unclear, and the overall mechanical strength and quality of the product are difficult to guarantee, making it difficult to meet actual production requirements. Summary of the Invention

[0003] The purpose of the present invention is to break through the limitation of the tactile feel of the smooth glaze surface of the colored glaze, and to provide a watermelon crackle glaze with a crackle effect and a preparation method thereof. The watermelon crackle glaze with a crackle effect is different from the traditional crackle glaze. The cracks of the watermelon crackle glaze are only visual crackle effects, and the real glaze layer does not produce cracks. The combination of the glaze layer and the body layer is tighter, and the sound when knocked is crisper. The overall mechanical strength and product quality of the product will be more guaranteed. It has the advantages of stable glaze color, high yield, vivid and controllable glaze surface changes, etc., which is convenient for achieving production stability and controllability.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A watermelon crackle glaze with a crackle effect comprises a base glaze and a top glaze. Calculated by weight, the base glaze comprises 60-66 parts of SiO2, 12-14 parts of Al2O3, 2-3 parts of K2O, 0.5-1 part of Na2O, 9-13 parts of CaO, 4-6 parts of MgO, 1-2.5 parts of Li2O, 2-3.5 parts of BaO, and 8-10 parts of dark green colorant. The top glaze comprises 48-51 parts of SiO2, 15-18 parts of Al2O3, 1.5-2.5 parts of K2O, 2.5-3.5 parts of Na2O, 5-8 parts of CaO, 5-7 parts of MgO, 1-1.5 parts of BaO, 10-14 parts of ZrO2, and 5-7 parts of light green colorant.

[0006] Preferably, the dark green colorant is chrome green, and the light green colorant is a mixture of vanadium blue and praseodymium yellow.

[0007] A method for preparing a watermelon crackle glaze with a crackle effect, the method comprising the following steps:

[0008] S1. Weigh the components of the base glaze and top glaze according to the recipe, add water and grind them. The residue on the sieve of the base glaze and top glaze is 0.4-0.6%, and the water-glaze specific gravity is 1.58-1.60.

[0009] S2, using the process of glazing, glue painting, glaze spraying, glue removal, and re-glazing, spraying the base glaze and the top glaze on the surface of the bisque-fired body in sequence;

[0010] S3. After the glaze is sprayed, the unglazed body is dried and placed in a kiln. A firing cycle of 8-12 hours is adopted, and the maximum sintering temperature is controlled at 1230-1260℃. After the firing is completed, it is slowly cooled out of the kiln to obtain a watermelon crackle glaze with a matte texture, a contrast of light and dark green, and a crackle effect.

[0011] Preferably, the specific process of step S2 is:

[0012] S21A, spray the base glaze on the surface of the unglazed body by spraying. Use a fine to medium atomization effect of water glaze. Apply glaze 2 to 3 times. Spray dry. The thickness of the glaze layer should be controlled at 0.4-0.6mm.

[0013] S22A: Using isolation glue, draw irregular curved lines of a certain width on the surface of the base glaze, following the dark texture of the watermelon effect.

[0014] S23A, after the film is dry, spray the top glaze on the base glaze with a larger spray glaze method, apply the glaze 2-3 times, and spray dry. The thickness of the glaze layer should be controlled at 0.3-0.5mm;

[0015] S24A. After the first spraying of the topcoat, tear off the previously painted film and spray another layer of topcoat.

[0016] Preferably, the specific process of step S2 is:

[0017] S21B, spray the base glaze on the surface of the unglazed body by spraying. Use a fine to medium atomization effect of water glaze. Apply glaze 2 to 3 times. Spray dry. The thickness of the glaze layer should be controlled at 0.4-0.6mm.

[0018] S22B, using isolation glue to draw irregular curved lines of a certain width on the surface of the base glaze according to the dark texture of the watermelon effect;

[0019] S23B, after the film is dry, spray the top glaze on the base glaze with a fine to medium spray method, apply the glaze 4-5 times, and spray dry. The thickness of the glaze layer should be controlled at 0.5-0.7mm.

[0020] S24B, after the first glaze is sprayed, the previously drawn film is removed and another layer of glaze is sprayed. Preferably, the specific operation of the firing process in step S3 is as follows: room temperature to 950°C, heating rate of 2.5 to 3.5°C / min; 950 to 1050°C, heating rate of 1.5 to 2.5°C / min; 1050 to the maximum sintering temperature, heating rate of 0.8 to 1.2°C / min, and holding at the maximum sintering temperature for 30 to 60 minutes.

[0021] After adopting the above technical solution, the present invention has the following advantages compared with the background technology:

[0022] 1. The present invention provides a watermelon crackle glaze with a crackle effect and a preparation method thereof. The watermelon crackle glaze with a crackle effect is different from the traditional crackle glaze. The cracks of the watermelon crackle glaze are only visual crackle effects, and the real glaze layer does not produce cracks. The glaze layer and the body layer are more tightly combined, and the sound when knocked is crisper. The overall mechanical strength and product quality of the product will be more guaranteed. It has the advantages of stable glaze color, high yield, vivid and controllable glaze surface changes, etc., which is convenient for achieving production stability and controllability.

[0023] 2. The present invention provides a watermelon crackle glaze with a crackle effect and a preparation method thereof. Through the production process of glazing - painting glue - spraying glaze - peeling glue - re-glazing, a second dark decorative effect is introduced, and the glaze main body has two tones of light green and dark green. At the same time, the combination of the two forms a crackle-like glaze effect on the glaze surface after high-temperature firing, thereby forming a richer glaze color change effect with the crackle-like glaze effect, which is closer to the appearance of a watermelon.

[0024] 3. The present invention provides a watermelon crackle glaze with a crackle effect and a preparation method thereof. By combining a glossy base glaze with a lower melting temperature and a matte top glaze with a higher sintering temperature, the difference in their initial melting temperature and high-temperature viscosity is used to achieve the melting-aiding effect of the base glaze on the top glaze, thereby causing the generation of glaze cracks. The combination of two different glaze spraying methods further promotes the cracks on the glaze surface, thereby forming a more coordinated texture overall. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the watermelon crackle glaze with crackle effect prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] Example 1

[0028] A watermelon crackle glaze with a crackle effect comprises a base glaze and a top glaze. Calculated by weight, the base glaze comprises 60 parts of SiO2, 12 parts of Al2O3, 2 parts of K2O, 0.5 parts of Na2O, 9 parts of CaO, 4 parts of MgO, 1 part of Li2O, 2 parts of BaO, and 8 parts of chrome green. The top glaze comprises 48 parts of SiO2, 15 parts of Al2O3, 1.5 parts of K2O, 2.5 parts of Na2O, 5 parts of CaO, 5 parts of MgO, 1 part of BaO, 10 parts of ZrO2, and 5 parts of a mixture of vanadium blue and praseodymium yellow.

[0029] A method for preparing a watermelon crackle glaze with a crackle effect, the method comprising the following steps:

[0030] S1. Weigh the components of the base glaze and top glaze according to the recipe, add water and grind them. The residue on the sieve of the base glaze and top glaze is 0.4%, and the water-glaze specific gravity is 1.58.

[0031] S2, using the process of glazing, glue painting, glaze spraying, glue removal, and re-glazing, spraying the base glaze and the top glaze on the surface of the bisque-fired body in sequence;

[0032] The specific process of step S2 is:

[0033] S21A, spray the base glaze on the surface of the unglazed body by spraying. Use a fine to medium atomization effect of water glaze. Apply the glaze twice. Spray dry. The thickness of the glaze layer should be controlled at 0.4mm.

[0034] S22A: Using isolation glue, draw irregular curved lines of a certain width on the surface of the base glaze, following the dark texture of the watermelon effect.

[0035] S23A, after the film is dry, spray the top glaze on the bottom glaze with a larger spray glaze method, apply glaze twice, spray dry, and control the glaze layer thickness to 0.3mm;

[0036] S24A, after the first spraying of the topcoat, tear off the previously painted film and spray another layer of topcoat;

[0037] S3. After the glaze is sprayed, the unglazed body is dried and placed in a kiln with an 8-hour firing cycle. The maximum sintering temperature is controlled at 1230°C. The specific firing curve is: room temperature to 950°C, with a heating rate of 2.5°C / min; 950 to 1050°C, with a heating rate of 1.5°C / min; 1050 to the maximum sintering temperature, with a heating rate of 0.8°C / min, and the maximum sintering temperature is kept warm for 30 minutes. After the firing is completed, the body is slowly cooled out of the kiln to obtain a watermelon crackle glaze with a matte texture, a crackle effect, and a contrast between light and dark green.

[0038] Example 2

[0039] A watermelon crackle glaze with a crackle effect comprises a base glaze and a top glaze. Calculated by weight, the base glaze comprises 66 parts of SiO2, 14 parts of Al2O3, 3 parts of K2O, 1 part of Na2O, 13 parts of CaO, 6 parts of MgO, 2.5 parts of Li2O, 3.5 parts of BaO, and 10 parts of chrome green. The top glaze comprises 51 parts of SiO2, 18 parts of Al2O3, 2.5 parts of K2O, 3.5 parts of Na2O, 8 parts of CaO, 7 parts of MgO, 1.5 parts of BaO, 14 parts of ZrO2, and 7 parts of a mixture of vanadium blue and praseodymium yellow.

[0040] A method for preparing a watermelon crackle glaze with a crackle effect, the method comprising the following steps:

[0041] S1. Weigh the components of the base glaze and top glaze according to the recipe, add water and grind them. The residue on the sieve of the base glaze and top glaze is 0.6%, and the water-glaze specific gravity is 1.60.

[0042] S2, using the process of glazing, glue painting, glaze spraying, glue removal, and re-glazing, spraying the base glaze and the top glaze on the surface of the bisque-fired body in sequence;

[0043] The specific process of step S2 is:

[0044] S21A, spray the base glaze on the surface of the unglazed body by spraying. Use a fine to medium atomization effect of water glaze. Apply the glaze three times and spray dry. The thickness of the glaze layer should be controlled at 0.6mm.

[0045] S22A: Using isolation glue, draw irregular curved lines of a certain width on the surface of the base glaze, following the dark texture of the watermelon effect.

[0046] S23A, after the film is dry, spray the top glaze on the bottom glaze with a larger spray glaze method, apply the glaze three times, and spray dry. The thickness of the glaze layer should be controlled at 0.5mm.

[0047] S24A, after the first spraying of the topcoat, tear off the previously painted film and spray another layer of topcoat;

[0048] S3. After the glaze sprayed unglazed body is dried, it is placed in a kiln and fired in a 12-hour cycle. The maximum sintering temperature is controlled at 1260°C. The specific firing curve is: room temperature to 950°C, with a heating rate of 3.5°C / min; 950 to 1050°C, with a heating rate of 2.5°C / min; 1050 to the maximum sintering temperature, with a heating rate of 1.2°C / min, and the maximum sintering temperature is kept warm for 60 minutes. After firing, the body is slowly cooled out of the kiln to obtain a watermelon crackle glaze with a matte texture, a crackle effect, and a contrast between light and dark green.

[0049] Example 3

[0050] A watermelon crackle glaze with a crackle effect comprises a base glaze and a top glaze. Calculated by weight, the base glaze comprises 60 parts of SiO2, 12 parts of Al2O3, 2 parts of K2O, 0.5 parts of Na2O, 9 parts of CaO, 4 parts of MgO, 1 part of Li2O, 2 parts of BaO, and 8 parts of chrome green. The top glaze comprises 48 parts of SiO2, 15 parts of Al2O3, 1.5 parts of K2O, 2.5 parts of Na2O, 5 parts of CaO, 5 parts of MgO, 1 part of BaO, 10 parts of ZrO2, and 5 parts of a mixture of vanadium blue and praseodymium yellow.

[0051] A method for preparing a watermelon crackle glaze with a crackle effect, the method comprising the following steps:

[0052] S1. Weigh the components of the base glaze and top glaze according to the recipe, add water and grind them. The residue on the sieve of the base glaze and top glaze is 0.4%, and the water-glaze specific gravity is 1.58.

[0053] S2, using the process of glazing, glue painting, glaze spraying, glue removal, and re-glazing, spraying the base glaze and the top glaze on the surface of the bisque-fired body in sequence;

[0054] The specific process of step S2 is:

[0055] S21B, spray the base glaze on the surface of the unglazed body by spraying. Use a fine to medium atomization effect of water glaze. Apply glaze twice. Spray dry. The thickness of the glaze layer should be controlled at 0.4mm.

[0056] S22B, using isolation glue to draw irregular curved lines of a certain width on the surface of the base glaze according to the dark texture of the watermelon effect;

[0057] S23B, after the film is dry, spray the top glaze on the base glaze in a fine to medium spraying manner, apply glaze 4 times, spray dry, and control the glaze layer thickness to 0.5mm;

[0058] S24B, after the first spraying of the topcoat, tear off the previously painted film and spray another layer of topcoat;

[0059] S3. After the glaze is sprayed, the unglazed body is dried and placed in a kiln with an 8-hour firing cycle. The maximum sintering temperature is controlled at 1230°C. The specific firing curve is: room temperature to 950°C, with a heating rate of 2.5°C / min; 950 to 1050°C, with a heating rate of 1.5°C / min; 1050 to the maximum sintering temperature, with a heating rate of 0.8°C / min, and the maximum sintering temperature is kept warm for 30 minutes. After the firing is completed, the body is slowly cooled out of the kiln to obtain a watermelon crackle glaze with a matte texture, a crackle effect, and a contrast between light and dark green.

[0060] Example 4

[0061] A watermelon crackle glaze with a crackle effect comprises a base glaze and a top glaze. Calculated by weight, the base glaze comprises 66 parts of SiO2, 14 parts of Al2O3, 3 parts of K2O, 1 part of Na2O, 13 parts of CaO, 6 parts of MgO, 2.5 parts of Li2O, 3.5 parts of BaO, and 10 parts of chrome green. The top glaze comprises 51 parts of SiO2, 18 parts of Al2O3, 2.5 parts of K2O, 3.5 parts of Na2O, 8 parts of CaO, 7 parts of MgO, 1.5 parts of BaO, 14 parts of ZrO2, and 7 parts of a mixture of vanadium blue and praseodymium yellow.

[0062] A method for preparing a watermelon crackle glaze with a crackle effect, the method comprising the following steps:

[0063] S1. Weigh the components of the base glaze and top glaze according to the recipe, add water and grind them. The residue on the sieve of the base glaze and top glaze is 0.6%, and the water-glaze specific gravity is 1.60.

[0064] S2, using the process of glazing, glue painting, glaze spraying, glue removal, and re-glazing, spraying the base glaze and the top glaze on the surface of the bisque-fired body in sequence;

[0065] The specific process of step S2 is:

[0066] S21B, spray the base glaze on the surface of the unglazed body by spraying. Use a fine to medium atomization effect of water glaze. Apply the glaze three times and spray dry. The thickness of the glaze layer should be controlled at 0.6mm.

[0067] S22B, using isolation glue to draw irregular curved lines of a certain width on the surface of the base glaze according to the dark texture of the watermelon effect;

[0068] S23B, after the film is dry, spray the top glaze on the base glaze in a fine to medium spraying manner, apply glaze 5 times, spray dry, and control the glaze layer thickness to 0.7mm;

[0069] S24B, after the first spraying of the topcoat, tear off the previously painted film and spray another layer of topcoat;

[0070] S3. After the glaze sprayed unglazed body is dried, it is placed in a kiln and fired in a 12-hour cycle. The maximum sintering temperature is controlled at 1260°C. The specific firing curve is: room temperature to 950°C, with a heating rate of 3.5°C / min; 950 to 1050°C, with a heating rate of 2.5°C / min; 1050 to the maximum sintering temperature, with a heating rate of 1.2°C / min, and the maximum sintering temperature is kept warm for 60 minutes. After firing, the body is slowly cooled out of the kiln to obtain a watermelon crackle glaze with a matte texture, a crackle effect, and a contrast between light and dark green.

[0071] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A watermelon crackle glaze with a crackle effect, characterized by: The invention comprises a base glaze and a top glaze; calculated by weight, the base glaze comprises 60-66 parts of SiO2, 12-14 parts of Al2O3, 2-3 parts of K2O, 0.5-1 parts of Na2O, 9-13 parts of CaO, 4-6 parts of MgO, 1-2.5 parts of Li2O, 2-3.5 parts of BaO, and 8-10 parts of dark green colorant; the top glaze comprises 48-51 parts of SiO2, 15-18 parts of Al2O3, 1.5-2.5 parts of K2O, 2.5-3.5 parts of Na2O, 5-8 parts of CaO, 5-7 parts of MgO, 1-1.5 parts of BaO, 10-14 parts of ZrO2, and 5-7 parts of light green colorant; The dark green colorant is chrome green, and the light green colorant is a mixture of vanadium blue and praseodymium yellow.

2. A method for preparing the watermelon crackle glaze with crackle effect as claimed in claim 1, characterized in that: The method comprises the following steps: S1. Weigh the components of the base glaze and top glaze according to the recipe, add water and grind them. The residue on the sieve of the base glaze and top glaze is 0.4-0.6%, and the water-glaze specific gravity is 1.58-1.

60. S2, using the process of glazing, glue painting, glaze spraying, glue removal, and re-glazing, spraying the base glaze and the top glaze on the surface of the bisque-fired body in sequence; S3. After the glaze is sprayed, the unglazed body is dried and placed in a kiln. A firing cycle of 8-12 hours is adopted, and the maximum sintering temperature is controlled at 1230-1260℃. After the firing is completed, it is slowly cooled out of the kiln to obtain a watermelon crackle glaze with a matte texture, a contrast of light and dark green, and a crackle effect.

3. The method for preparing the watermelon crackle glaze with crackle effect according to claim 2, characterized in that: The specific process of step S2 is: S21A, spray the base glaze on the surface of the unglazed body by spraying. Use a fine to medium atomization effect of water glaze. Apply glaze 2 to 3 times. Spray dry. The thickness of the glaze layer should be controlled at 0.4-0.6mm. S22A: Using a release glue, draw irregularly curved lines of a certain width on the surface of the base glaze, following the dark texture of the watermelon effect. S23A, after the film is dry, spray the top glaze on the base glaze with a larger spray glaze method, apply the glaze 2-3 times, and spray dry. The thickness of the glaze layer should be controlled at 0.3-0.5mm; S24A. After the first spraying of the topcoat, tear off the previously painted film and spray another layer of topcoat.

4. The method for preparing the watermelon crackle glaze with crackle effect according to claim 2, wherein: The specific process of step S2 is: S21B, spray the base glaze on the surface of the unglazed body by spraying. Use a fine to medium atomization effect of water glaze. Apply glaze 2 to 3 times. Spray dry. The thickness of the glaze layer should be controlled at 0.4-0.6mm. S22B, using isolation glue to draw irregular curved lines of a certain width on the surface of the base glaze according to the dark texture of the watermelon effect; S23B, after the film is dry, spray the top glaze on the base glaze with a fine to medium spray method, apply glaze 4-5 times, spray dry, and control the glaze layer thickness to 0.5-0.7mm; S24B. After the first spraying of the topcoat, tear off the previously painted film and spray another layer of topcoat.

5. The method for preparing the watermelon crackle glaze with crackle effect according to claim 2, characterized in that: The specific operation of the sintering process in step S3 is: room temperature to 950°C, heating rate of 2.5~3.5°C / min; 950~1050°C, heating rate of 1.5~2.5°C / min; 1050~maximum sintering temperature, heating rate of 0.8~1.2°C / min, and keeping at the maximum sintering temperature for 30~60min.

Images