Clay with glassy green glaze color and preparation method thereof

Abstract

The invention belongs to the field of clay firing, and particularly relates to clay with green glazing glass and a preparation method of the clay. The vitreous clay with the green glazing color is prepared from the following raw materials in parts by weight: 30 to 35 parts of feldspar, 4 to 6 parts of limestone, 3 to 5 parts of zinc oxide, 9 to 11 parts of barium carbonate, 0.2 to 0.4 part of ferric oxide, 5 to 6 parts of kaolin and 40 to 45 parts of quartz. The invention not only provides a novel clay pug formula, but also improves the vitrification degree of the clay, and finally develops to obtain the green glaze vitreous clay. According to the preparation method, the problem of thermal expansion between blank glazes is solved to a certain extent, the possibility of combination of glaze color development and clay is realized, and ceramic application and creation materials are greatly expanded.

Description

Technical Field

[0001] The present invention belongs to the field of clay firing, and particularly relates to a kind of clay with celadon-colored vitreous and a preparation method thereof. Background Art

[0002] The main raw material for making ceramics is clay. The vitrification of clay is a basic characteristic of clay. Different degrees of vitrification of clay present different textures and colorations. With the continuous improvement of vitrification, the coloration of clay will become more and more abundant.

[0003] However, in order to avoid the deformation of clay at high temperatures, the degree of vitrification of general clay is not too high. Therefore, it is difficult for clay to present good coloration, resulting in a relatively single variety of clay at the present stage. In particular, there is a lack of research in the field of vitreous clay with both coloration and vitreous phase. That is, there is still a need to deeply develop new clay formulas and corresponding preparation processes to explore the new value of vitrified clay and the possibilities with more modern expressiveness.

[0004] Therefore, based on this, the technical solution of the present invention is proposed. Summary of the Invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a kind of clay with celadon-colored vitreous, which comprises the following raw materials in parts by weight: 30 - 35 parts of feldspar, 4 - 6 parts of limestone, 3 - 5 parts of zinc oxide, 9 - 11 parts of barium carbonate, 0.2 - 0.4 parts of iron oxide, 5 - 6 parts of kaolin, and 40 - 45 parts of quartz.

[0006] Preferably, the clay with celadon-colored vitreous comprises the following raw materials in parts by weight: 32.57 parts of feldspar, 4.83 parts of limestone, 3.92 parts of zinc oxide, 9.52 parts of barium carbonate, 0.30 parts of iron oxide, 5.35 parts of kaolin, and 43.51 parts of quartz.

[0007] The experimental formula of the clay with celadon-colored vitreous is as Figure 1 shown, and the chemical composition is shown in Table 1.

[0008] Table 1

[0009]

[0010] It should be noted that when the content of SiO2 in the celadon-colored vitreous clay is 60.0 - 82.0%, the content of Al2O3 is 3.0 - 16.0%, the content of K / Na2O, CaO, ZnO, BaO is 12.0 - 36.0%, and the content of Fe2O3 is 0.0 - 2.0%, the final effect is the best.

[0011] Based on the same inventive concept, another solution of the present invention is to provide a method for preparing clay with celadon-colored vitreous, and the preparation method includes the following steps:

[0012] (1) Add water to the clay raw material and grind it to obtain a slurry;

[0013] (2) Add a binder to the slurry, then screen and dewater it in sequence to obtain a clay mass;

[0014] (3) Fire the clay mass and that's it.

[0015] Preferably, in step (1), the grinding is ball milling; wherein:

[0016] The ball milling medium in the ball milling process is high-purity alumina balls.

[0017] Preferably, the mass ratio of high-purity alumina balls to the clay raw material is 1:1 to 5:1, the ball milling time is 10 to 12 h, and the ball milling speed is 60 to 120 r / min;

[0018] The mass ratio of the clay raw material to water is 1:1 to 3:1.

[0019] Preferably, in step (2), the binder is corn starch, and the addition amount of the binder is 0.5 to 5 wt% of the clay raw material.

[0020] Preferably, in step (2), the screening is through a 180-200 mesh sieve; the water content after dewatering is 18 to 26 wt%.

[0021] Preferably, in step (3), the firing temperature is 1280 to 1300 °C, and the firing time is 10 to 12 h.

[0022] The beneficial effects of the present invention are as follows:

[0023] The present invention not only provides a new clay mass formula, but also improves the degree of vitrification of the clay, and finally develops celadon-colored vitreous clay. The preparation method solves the thermal expansion problem between the green body and the glaze to a certain extent, realizes the possibility of combining the glaze color development with the clay, and greatly expands the ceramic application and creative materials. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is the experimental formula diagram of celadon-colored vitreous clay.

[0026] Figure 2 It is a real-shot picture of the clay before firing.

[0027] Figure 3 It is a real-shot picture of the clay after firing.

[0028] Figure 4 It is a real-shot picture of celadon-colored vitreous clay at the first ratio.

[0029] Figure 5 It is a real-shot picture of celadon-colored vitreous clay at the second ratio.

[0030] Figure 6 It is a real-shot picture of celadon-colored vitreous clay at the third ratio.

[0031] Figure 7 It is the change diagram of the color of celadon-colored vitreous clay with the SiO2 content.

[0032] Figure 8 It is the change diagram of the color of celadon-colored vitreous clay with the Fe2O3 content. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the scope protected by the present invention.

[0034] Example 1

[0035] This example provides a preparation method of clay with celadon-colored vitreous, and the preparation method includes the following steps:

[0036] (1) Mix 30 g of feldspar, 4 g of limestone, 3 g of zinc oxide, 9 g of barium carbonate, 0.2 g of iron oxide, 5 g of kaolin, and 40 g of quartz, and then perform coarse pulverization to obtain clay raw material powder;

[0037] (2) Add the clay raw material powder into a ball mill tank for ball milling. The ball milling medium is high-purity alumina balls, the mass ratio of balls to materials is 1:1, the ball milling time is 10 h, the ball milling speed is 60 r / min, and the mass ratio of materials to water is 1:1;

[0038] (3) After grinding is completed, corn starch binder is added to the slurry (it is added after being cooked into a slurry, and the viscosity is relatively high at this time), and the addition amount is 0.5 wt% of the clay raw material. Then, it is sieved through a 180-mesh sieve, and finally water is removed and the water content is controlled to be 18 wt% to obtain the mud material;

[0039] (4) The mud material is fired at 1280 °C, and that's it after completion.

[0040] Example 2

[0041] This example provides a preparation method of clay with celadon-colored vitreous. The preparation method includes the following steps:

[0042] (1) 35 g of feldspar, 6 g of limestone, 5 g of zinc oxide, 11 g of barium carbonate, 0.4 g of iron oxide, 6 g of kaolin, and 45 g of quartz are mixed and coarsely pulverized to obtain clay raw material powder;

[0043] (2) The clay raw material powder is added to a ball mill tank for ball milling. The ball milling medium is high-purity alumina balls, the ball-to-material mass ratio is 5:1, the ball milling time is 12 h, the ball milling speed is 120 r / min, and the material-to-water mass ratio is 3:1;

[0044] (3) After grinding is completed, corn starch binder is added to the slurry (it is added after being cooked into a slurry, and the viscosity is relatively high at this time), and the addition amount is 5 wt% of the clay raw material. Then, it is sieved through a 200-mesh sieve, and finally water is removed and the water content is controlled to be 26 wt% to obtain the mud material;

[0045] (4) The mud material is fired at 1300 °C, and that's it after completion.

[0046] Example 3

[0047] This example provides a preparation method of clay with celadon-colored vitreous. The preparation method includes the following steps:

[0048] (1) 32.57 g of feldspar, 4.83 g of limestone, 3.92 g of zinc oxide, 9.52 g of barium carbonate, 0.3 g of iron oxide, 5.35 g of kaolin, and 43.51 g of quartz are mixed and coarsely pulverized to obtain clay raw material powder;

[0049] (2) The clay raw material powder is added to a ball mill tank for ball milling. The ball milling medium is high-purity alumina balls, the ball-to-material mass ratio is 3:1, the ball milling time is 11 h, the ball milling speed is 90 r / min, and the material-to-water mass ratio is 2:1;

[0050] (3) After grinding is completed, corn starch binder is added to the slurry (it is cooked into a slurry and added, with a relatively high viscosity at this time), and the addition amount is 2.5 wt% of the clay raw material. Then, it is sieved through a 190-mesh sieve, and finally, water is removed and the water content is controlled to be 22 wt% to obtain the clay material;

[0051] (4) The clay material is fired at 1290 °C, and that's it after completion.

[0052] Verification Example

[0053] (1) Taking Example 3 as an object, the photo before firing is as Figure 2 shown, and the photo after firing is as Figure 3 shown. By comparison, it can be seen that the present invention has successfully fired clay with celadon-colored vitreous.

[0054] (2) The present invention also studied the content of SiO2 in the celadon-colored vitreous clay raw material and found that when the ratio of SiO2 to the content of K / Na2O, CaO, ZnO, and BaO is between 1.5 and 3.0 at high temperature, the celadon-colored vitreous clay is cyan and will soften and deform, as Figure 4 shown. When the ratio of SiO2 to the content of K / Na2O, CaO, ZnO, and BaO is between 3.0 and 4.5, the celadon-colored vitreous clay is cyan and will not soften and deform, which is the optimal ratio, as Figure 5 shown. When the ratio of SiO2 to the content of K / Na2O, CaO, ZnO, and BaO is above 4.5, the celadon-colored vitreous clay is not cyan and will not soften and deform, as Figure 6 shown. That is, due to different content ratios in the celadon-colored vitreous clay, two textures will finally be presented, and the trend is as Figure 7 shown.

[0055] (3) Taking Example 3 as an object, the shrinkage rate and water absorption rate of the celadon-colored vitreous clay are measured, and the results are shown in Table 2 and Table 3 respectively.

[0056] Table 2 Shrinkage Rate of Celadon-Colored Vitreous Clay

[0057] <![CDATA[Length L1 (cm) before drying]]> <![CDATA[Fired length L2 (cm)]]> <![CDATA[Length of L2 - L1]]> Firing shrinkage (%) 12 10.6 1.4 11.67

[0058] Table 3 Water Absorption Rate of Celadon-Colored Vitreous Clay

[0059] Weight after drying (g) Weight after moisture supersaturation (g) Absorbed water weight (g) Water absorption rate (%) 82.3546 83.6054 1.2508 1.4961

[0060] (4) The present invention also found that when the content of Fe2O3 changes from 0 to 2%, the color of the celadon-colored vitreous clay also changes from left to right, as Figure 8 shown.

[0061] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims described above.

Claims

1. A kind of clay with celadon-colored vitreous, characterized in that, It comprises raw materials in the following parts by weight: 30-35 parts of feldspar, 4-6 parts of limestone, 3-5 parts of zinc oxide, 9-11 parts of barium carbonate, 0.2-0.4 part of iron oxide, 5-6 parts of kaolin, and 40-45 parts of quartz.

2. The clay with celadon-colored vitreous according to claim 1, characterized in that, It comprises raw materials in the following parts by weight: 32.57 parts of feldspar, 4.83 parts of limestone, 3.92 parts of zinc oxide, 9.52 parts of barium carbonate, 0.30 part of iron oxide, 5.35 parts of kaolin, and 43.51 parts of quartz.

3. The preparation method of the clay with celadon-colored vitreous according to claim 1 or 2, characterized in that, The preparation method comprises the following steps: (1) Grind the clay raw materials after adding water to obtain a slurry; (2) Add a binder to the slurry, then screen and dewater it successively to obtain a mud material; (3) Fire the mud material and it is completed.

4. The preparation method of the clay with celadon-colored vitreous according to claim 3, characterized in that, In step (1), the grinding is ball milling; wherein: The ball milling medium in the ball milling process is high-purity alumina balls.

5. The preparation method of the clay with celadon-colored vitreous according to claim 4, characterized in that, The mass ratio of the high-purity alumina balls to the clay raw materials is 1:1-5:1, the ball milling time is 10-12 h, and the ball milling speed is 60-120 r / min; The mass ratio of the clay raw materials to water is 1:1-3:

1.

6. The preparation method of the clay with celadon glassy quality according to claim 3, characterized in that, In step (2), the binder is corn starch, and the addition amount of the binder is 0.5-5 wt% of the clay raw materials.

7. The preparation method of the clay with celadon-colored vitreous according to claim 3, characterized in that, In step (2), the screening is through a 180-200 mesh sieve; the water content after dewatering is 18-26 wt%.

8. The preparation method of the clay with celadon-colored vitreous according to claim 3, characterized in that, In step (3), the firing temperature is 1280-1300 °C, and the firing time is 10-12 h.

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