Wear-resistant and crack-resistant porcelain product glaze and preparation process thereof

Abstract

The application discloses a wear-resistant and anti-cracking porcelain product glaze and a preparation process thereof and belongs to the technical field of porcelain product production. The porcelain product glaze is prepared by mixing and stirring the following raw materials: 20-25 parts of kaolin, 16-19 parts of quartz, 5-15 parts of mica powder, 10-12 parts of modified cordierite, 5-20 parts of Guibao stone, 15-30 parts of white corundum, 5-8 parts of polyethylene wax powder, 1-4 parts of sintered alumina, 2-4 parts of calcined zinc oxide, 1-3 parts of clinker, 1-3 parts of diopside and 1-4 parts of zirconium silicate; the cordierite is compounded with agar, the cordierite particles are fine and smooth in surface, have good coating performance, are uniformly attached to the surface of the porcelain product, provide a uniform glaze layer, improve the high-temperature resistance of the porcelain product, improve the anti-cracking ability, protect the smoothness and appearance of the surface of the porcelain product, improve the wear resistance, and enrich the decorative property of the porcelain product.

Description

Technical Field

[0001] This invention belongs to the field of ceramic product manufacturing technology, specifically relating to a wear-resistant and crack-resistant ceramic glaze and its preparation process. Background Technology

[0002] Porcelain glaze is a material made by melting inorganic powders such as silicates and oxides at high temperatures and then coating the outer layer of the ceramic body. It has been widely used in the production of ceramic products, such as tableware, kitchenware, sanitary ware, artwork, walls, and floors, and has a long history. However, during daily use and cleaning, these porcelain products often experience wear and tear, leaving scratches that affect the appearance and lifespan of the glaze, and also make the porcelain products increasingly susceptible to corrosion and breakage.

[0003] Furthermore, daily-use porcelain products are frequently sterilized at high temperatures and then cooled during use. This frequent alternation of high temperature and cooling greatly reduces the lifespan and quality of porcelain products. The rapid changes in high temperature and cooling can easily lead to thermal shock cracking of porcelain products, which is a phenomenon of porcelain body cracking due to a sudden change in temperature. This accelerates the wear of the porcelain product surface, resulting in a decrease in smoothness, and in severe cases, it may affect the use of the product. Summary of the Invention

[0004] The purpose of this invention is to provide a wear-resistant and crack-resistant glaze for porcelain products and its preparation process. This invention discloses a wear-resistant and crack-resistant glaze for porcelain products and its preparation process, relating to the field of porcelain product manufacturing technology. The porcelain glaze comprises the following raw materials in parts by weight: 20-25 parts kaolin, 16-19 parts quartz, 5-15 parts mica powder, 10-12 parts modified cordierite, 5-20 parts cinnamon sapphire, 15-30 parts white corundum, 5-8 parts polyethylene wax powder, 1-4 parts sintered alumina, 2-4 parts calcined zinc oxide, 1-3 parts frit, 1-3 parts diopside, and 1-4 parts zirconium silicate. The cordierite is compounded with agar. The cordierite particles are fine and have a smooth surface, resulting in good coating performance. It adheres evenly to the surface of the porcelain product, providing a uniform glaze layer, improving the high-temperature resistance of the porcelain product, enhancing its crack resistance, protecting the surface smoothness and appearance of the porcelain product, improving its wear resistance, and enriching the decorative properties of the ceramic product.

[0005] The technical problem to be solved by this invention is to prepare a wear-resistant and crack-resistant glaze, apply it to the surface of the body and sinter it at high temperature to make porcelain products, thereby improving the wear resistance and crack resistance of the porcelain products.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A wear-resistant and crack-resistant glaze for ceramic products comprises the following raw materials in parts by weight: 20-25 parts kaolin, 16-19 parts quartz, 5-15 parts mica powder, 10-12 parts modified cordierite, 5-20 parts cinnamon, 15-30 parts white corundum, 5-8 parts polyethylene wax powder, 1-4 parts sintered alumina, 2-4 parts calcined zinc oxide, 1-3 parts frit, 1-3 parts diopside, and 1-4 parts zirconium silicate.

[0008] As a preferred embodiment of the present invention, the preparation of the modified cordierite includes the following steps:

[0009] (1) Mix agar and glycerol, heat and stir to form a mixture;

[0010] (2) Add cordierite powder to the mixture, adjust the pH, stir ultrasonically, add sodium silicate, let stand, and solidify to obtain modified cordierite.

[0011] As a preferred embodiment of the present invention, the mass ratio of agar, glycerol, cordierite, and sodium silicate is 1.3:300:1-1.5:0.2-0.3.

[0012] As a preferred technical solution of the present invention, in step (1), the heating and stirring refers to stirring for 4 hours under water bath heating conditions at 80°C, and the stirring speed is 1000 rpm.

[0013] As a preferred technical solution of the present invention, in step (2), the ultrasonic stirring time is 30-80 min, the standing time is 12-24 h, and the pH adjustment refers to adjusting the pH to 7.5-8 with alkaline solution.

[0014] A process for preparing a wear-resistant and crack-resistant glaze for ceramic products includes the following steps:

[0015] The kaolin, quartz, mica powder, modified cordierite, cinnamon, white corundum, polyethylene wax powder, sintered alumina, calcined zinc oxide, frit, diopside, and zirconium silicate are mixed and ground in a ball mill, then sieved to obtain the glaze for the porcelain products.

[0016] As a preferred embodiment of the present invention, the grinding speed of the ball mill is 200 rpm; the sieve mesh size is 100-200 mesh.

[0017] The application of a wear-resistant and crack-resistant ceramic glaze refers to mixing the ceramic glaze with deionized water to prepare a glaze slurry, pouring the glaze slurry onto the surface of the ceramic body to obtain a ceramic semi-finished product, sintering the ceramic semi-finished product, and holding it at a high temperature for 15-20 hours to achieve a complete degree of vitrification, thereby obtaining ceramic.

[0018] As a preferred embodiment of the present invention, the mass ratio of the ceramic glaze to the deionized water is 6-7:5-8.

[0019] As a preferred embodiment of the present invention, the sintering temperature is 1250-1290℃.

[0020] The beneficial effects of this invention are:

[0021] (1) The wear-resistant and crack-resistant porcelain glaze and its preparation process disclosed in this invention are achieved by combining cordierite with agar. Cordierite particles are fine and have a smooth surface, good coating performance, easy to mix with other glaze raw materials, and can be uniformly attached to the surface of porcelain products to provide a uniform glaze layer. At the same time, the excellent mechanical properties of cordierite can improve the high temperature resistance of porcelain products, improve crack resistance, protect the smoothness and good appearance of the porcelain product surface, improve wear resistance, provide a stable glaze color effect, and enrich the decorative properties of ceramic products.

[0022] (2) Further, by adding cordierite powder to the agar mixture, the cordierite particles have a negative charge on their surface. Hydroxide ions are added to the mixture, and sodium silicate is added as a dispersion liquid. The dispersibility of cordierite particles in the agar is improved by electrostatic repulsion, and the cordierite particles are thus uniformly dispersed in the agar matrix. The agar, as a carrier of cordierite, contains a large number of hydroxyl groups, which form hydrogen bond connections with the silica matrix in the glaze, allowing the cordierite to adhere to the silica surface and exert the excellent properties of cordierite.

[0023] (3) Further, cordierite is attached to the surface of silica by agar. During the sintering process of ceramic glaze, cordierite forms microcrystals, which increases the gloss and brightness of the glaze, making the glaze more delicate and smooth. The microcrystals have good fluidity and wettability, which can fill the gaps in the glaze, improve the density of the glaze, reduce the porosity and defects of the glaze, thereby enhancing the hardness and anti-pollution performance of the glaze and reducing the cracking of the glaze. At the same time, agar is rich in galactofuranose. When the galactofuranose solution comes into contact with the microcrystals, the galactofuranose molecules will be adsorbed near the surface of the microcrystals, forming a stable adsorption layer to form a molecular barrier, preventing the movement and expansion of the grain boundary, thereby inhibiting the reduction of the energy of the grain boundary. The galactofuranose molecules near the grain boundary can provide energy and the location for crystal growth, so that the grains near the grain boundary recrystallize and form a more complete crystal structure, improving the mechanical properties of cordierite.

[0024] (4) Furthermore, under high-temperature sintering, the magnesium oxide in cordierite and the main silica in the molten state form a magnesium silicate lattice to form a more stable chemical bond connection, which reduces stress and cracking caused by temperature changes and has good corrosion resistance. Detailed Implementation

[0025] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with embodiments, is provided below.

[0026] Example 1

[0027] 1.3 parts by weight of agar and 300 parts by weight of glycerol were mixed and stirred for 4 hours at 1000 rpm under a water bath at 80°C to form a mixture. 1 part by weight of cordierite powder was added to the mixture, the pH was adjusted to 7.5 with sodium hydroxide solution, and the mixture was ultrasonically stirred for 30 minutes. 0.2 parts by weight of sodium silicate was added, and the mixture was allowed to stand for 24 hours to solidify, thus obtaining modified cordierite.

[0028] 20 parts by weight of kaolin, 16 parts by weight of quartz, 5 parts by weight of mica powder, 10 parts by weight of modified cordierite, 5 parts by weight of cinnamon, 15 parts by weight of white corundum, 5 parts by weight of polyethylene wax powder, 1 part by weight of sintered alumina, 2 parts by weight of calcined zinc oxide, 1 part by weight of frit, 1 part by weight of diopside and 1 part by weight of zirconium silicate are mixed and put into a ball mill for grinding at a speed of 200 rpm. The mixture is then passed through a 200-mesh sieve to obtain a glaze for ceramic products.

[0029] The frit comprises 0.5 parts by mass of silicon dioxide, 0.3 parts by mass of calcium oxide, and 0.2 parts by mass of boron oxide;

[0030] Six parts by mass of porcelain glaze are mixed with five parts by mass of deionized water to prepare a glaze slurry. The glaze slurry is then poured onto the surface of the ceramic body to obtain a ceramic semi-finished product. The ceramic semi-finished product is then fired at 1290℃ and held at that temperature for 15 hours to achieve complete vitrification, thus obtaining the ceramic.

[0031] Example 2

[0032] 1.3 parts by weight of agar and 300 parts by weight of glycerol were mixed and stirred for 4 hours at 1000 rpm under a water bath at 80°C to form a mixture. 1.25 parts by weight of cordierite powder were added to the mixture, the pH was adjusted to 7.8 with sodium hydroxide solution, and the mixture was ultrasonically stirred for 50 minutes. 0.25 parts by weight of sodium silicate were added, and the mixture was allowed to stand for 18 hours to solidify, thus obtaining modified cordierite.

[0033] 22 parts by weight of kaolin, 18 parts by weight of quartz, 10 parts by weight of mica powder, 11 parts by weight of modified cordierite, 15 parts by weight of cinnamon sapphire, 25 parts by weight of white corundum, 7 parts by weight of polyethylene wax powder, 3 parts by weight of sintered alumina, 3 parts by weight of calcined zinc oxide, 2 parts by weight of frit, 2 parts by weight of diopside and 2 parts by weight of zirconium silicate are mixed and put into a ball mill for grinding at a speed of 200 rpm and passed through a 150-mesh sieve to obtain a glaze for porcelain products.

[0034] The fused block comprises 1 part by mass of silicon dioxide, 0.6 parts by mass of calcium oxide, and 0.4 parts by mass of boron oxide;

[0035] 6.5 parts by weight of porcelain glaze and 6 parts by weight of deionized water are mixed to prepare glaze slurry. The glaze slurry is poured onto the surface of the body to obtain a ceramic semi-finished product. The ceramic semi-finished product is fired at 1270℃ and held for 18 hours to achieve complete vitrification and obtain ceramic.

[0036] Example 3

[0037] 1.3 parts by weight of agar and 300 parts by weight of glycerol were mixed and stirred for 4 hours in a water bath at 80°C with a stirring speed of 1000 rpm to form a mixture. 1.5 parts by weight of cordierite powder were added to the mixture, the pH was adjusted to 8 with sodium hydroxide solution, and the mixture was ultrasonically stirred for 80 minutes. 0.3 parts by weight of sodium silicate were added, and the mixture was allowed to stand for 24 hours to solidify, thus obtaining modified cordierite.

[0038] 25 parts by weight of kaolin, 19 parts by weight of quartz, 15 parts by weight of mica powder, 12 parts by weight of modified cordierite, 20 parts by weight of cinnamon sapphire, 30 parts by weight of white corundum, 8 parts by weight of polyethylene wax powder, 4 parts by weight of sintered alumina, 4 parts by weight of calcined zinc oxide, 3 parts by weight of frit, 3 parts by weight of diopside and 4 parts by weight of zirconium silicate are mixed and put into a ball mill for grinding at a speed of 200 rpm and passed through a 100-mesh sieve to obtain a glaze for porcelain products.

[0039] The frit comprises 1.5 parts by mass of silicon dioxide, 0.9 parts by mass of calcium oxide, and 0.6 parts by mass of boron oxide;

[0040] Seven parts by weight of porcelain glaze and eight parts by weight of deionized water are mixed to prepare a glaze slurry. The glaze slurry is poured onto the surface of the body to obtain a ceramic semi-finished product. The ceramic semi-finished product is fired at 1250℃ and held for 20 hours to achieve complete vitrification, thus obtaining the ceramic.

[0041] Comparative Example 1

[0042] 20 parts by weight of kaolin, 16 parts by weight of quartz, 5 parts by weight of mica powder, 10 parts by weight of cordierite, 5 parts by weight of cinnamon, 15 parts by weight of white corundum, 5 parts by weight of polyethylene wax powder, 1 part by weight of sintered alumina, 2 parts by weight of calcined zinc oxide, 1 part by weight of frit, 1 part by weight of diopside and 1 part by weight of zirconium silicate are mixed and put into a ball mill for grinding at a speed of 200 rpm. The mixture is then passed through a 200-mesh sieve to obtain a glaze for porcelain products.

[0043] The frit comprises 0.5 parts by mass of silicon dioxide, 0.3 parts by mass of calcium oxide, and 0.2 parts by mass of boron oxide;

[0044] Six parts by mass of porcelain glaze are mixed with five parts by mass of deionized water to prepare a glaze slurry. The glaze slurry is then poured onto the surface of the ceramic body to obtain a ceramic semi-finished product. The ceramic semi-finished product is then fired at 1290℃ and held at that temperature for 15 hours to achieve complete vitrification, thus obtaining the ceramic.

[0045] Comparative Example 2

[0046] 1.3 parts by weight of agar and 300 parts by weight of glycerol were mixed and stirred for 4 hours in a water bath at 80°C with a stirring speed of 1000 rpm to form a mixture. 1 part by weight of cordierite powder was added to the mixture, and the mixture was ultrasonically stirred for 30 minutes. 0.2 parts by weight of sodium silicate were added, and the mixture was allowed to stand for 24 hours to solidify, thus obtaining modified cordierite.

[0047] 20 parts by weight of kaolin, 16 parts by weight of quartz, 5 parts by weight of mica powder, 10 parts by weight of modified cordierite, 5 parts by weight of cinnamon, 15 parts by weight of white corundum, 5 parts by weight of polyethylene wax powder, 1 part by weight of sintered alumina, 2 parts by weight of calcined zinc oxide, 1 part by weight of frit, 1 part by weight of diopside and 1 part by weight of zirconium silicate are mixed and put into a ball mill for grinding at a speed of 200 rpm. The mixture is then passed through a 200-mesh sieve to obtain a glaze for ceramic products.

[0048] The frit comprises 0.5 parts by mass of silicon dioxide, 0.3 parts by mass of calcium oxide, and 0.2 parts by mass of boron oxide;

[0049] Six parts by mass of porcelain glaze are mixed with five parts by mass of deionized water to prepare a glaze slurry. The glaze slurry is then poured onto the surface of the ceramic body to obtain a ceramic semi-finished product. The ceramic semi-finished product is then fired at 1290℃ and held at that temperature for 15 hours to achieve complete vitrification, thus obtaining the ceramic.

[0050] Comparative Example 3

[0051] 1.3 parts by weight of agar and 300 parts by weight of glycerol were mixed and stirred for 4 hours at 1000 rpm under a water bath at 80°C to form a mixture. 1 part by weight of cordierite powder was added to the mixture, the pH was adjusted to 7.5 with sodium hydroxide solution, the mixture was ultrasonically stirred for 30 minutes, allowed to stand for 24 hours, and then solidified to obtain modified cordierite.

[0052] 20 parts by weight of kaolin, 16 parts by weight of quartz, 5 parts by weight of mica powder, 10 parts by weight of modified cordierite, 5 parts by weight of cinnamon, 15 parts by weight of white corundum, 5 parts by weight of polyethylene wax powder, 1 part by weight of sintered alumina, 2 parts by weight of calcined zinc oxide, 1 part by weight of frit, 1 part by weight of diopside and 1 part by weight of zirconium silicate are mixed and put into a ball mill for grinding at a speed of 200 rpm. The mixture is then passed through a 200-mesh sieve to obtain a glaze for ceramic products.

[0053] The frit comprises 0.5 parts by mass of silicon dioxide, 0.3 parts by mass of calcium oxide, and 0.2 parts by mass of boron oxide;

[0054] Six parts by mass of porcelain glaze are mixed with five parts by mass of deionized water to prepare a glaze slurry. The glaze slurry is then poured onto the surface of the ceramic body to obtain a ceramic semi-finished product. The ceramic semi-finished product is then fired at 1290℃ and held at that temperature for 15 hours to achieve complete vitrification, thus obtaining the ceramic.

[0055] Performance testing

[0056] Thermal shock resistance test was conducted according to standard GB / T 3298-2008;

[0057] Abrasion resistance was tested according to standard GB / T 3810.7-2016.

[0058] The ceramics prepared in Examples 1-3 and Comparative Examples 1-3 were subjected to performance tests according to the above standards. The test results are shown in Table 1 below:

[0059] Table 1

[0060] project Thermal shock resistance (100~20℃) Abrasion resistance classification (grade number) Example 1 No cracks 4～5 Example 2 No cracks 5 Example 3 No cracks 5 Comparative Example 1 Obvious cracks 3 Comparative Example 2 Localized microcracks 3～4 Comparative Example 3 Obvious cracks 4

[0061] As shown in Table 1, the ceramic products of the present invention have good crack resistance and wear resistance, good thermal shock resistance, and are not prone to surface cracks when used in natural environments with alternating hot and cold temperatures. They have a high wear resistance level and excellent wear resistance. During use, they are not easily affected by scratches, and have high comprehensive mechanical strength.

[0062] Comparative Example 1 was prepared based on Example 1, and its thermal shock resistance and abrasion resistance were significantly reduced.

[0063] Comparative Example 2 was prepared based on Example 1, and its thermal shock resistance was reduced and its wear resistance was significantly decreased.

[0064] Comparative Example 3 was prepared based on Example 1, and its thermal shock resistance was significantly reduced, and its wear resistance was somewhat reduced.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A wear-resistant and crack-resistant glaze for porcelain products, characterized in that, The raw materials include the following parts by weight: 20-25 parts kaolin, 16-19 parts quartz, 5-15 parts mica powder, 10-12 parts modified cordierite, 5-20 parts cinnamon sapphire, 15-30 parts white corundum, 5-8 parts polyethylene wax powder, 1-4 parts sintered alumina, 2-4 parts calcined zinc oxide, 1-3 parts frit, 1-3 parts diopside, and 1-4 parts zirconium silicate. The preparation of the modified cordierite includes the following steps: (1) Mix agar and glycerol, heat and stir to form a mixture; (2) Add cordierite powder to the mixture, adjust the pH, stir ultrasonically, add sodium silicate, let stand, solidify, and obtain modified cordierite; The mass ratio of agar, glycerol, cordierite, and sodium silicate is 1.3:300:1-1.5:0.2-0.

3. In step (1), the heating and stirring refers to stirring for 4 hours under water bath heating conditions at 80°C, and the stirring speed is 1000 rpm; In step (2), the ultrasonic stirring time is 30-80 min, the standing time is 12-24 h, and the pH adjustment refers to adjusting the pH to 7.5-8 with alkaline solution.

2. A preparation process for a wear-resistant and crack-resistant ceramic glaze as described in claim 1, characterized in that, Includes the following steps: The kaolin, quartz, mica powder, modified cordierite, cinnamon, white corundum, polyethylene wax powder, sintered alumina, calcined zinc oxide, frit, diopside, and zirconium silicate are mixed and ground in a ball mill, then sieved to obtain the glaze for the porcelain products.

3. The preparation process of the wear-resistant and crack-resistant ceramic glaze according to claim 2, characterized in that, The ball mill has a grinding speed of 200 rpm; the sieve mesh size is 100-200 mesh.

4. The application of a wear-resistant and crack-resistant glaze for ceramic products as described in claim 1, characterized in that, The application refers to mixing the glaze of the porcelain product with deionized water to prepare a glaze slurry, pouring the glaze slurry onto the surface of the body to obtain a ceramic semi-finished product, sintering the ceramic semi-finished product, holding it at a temperature for 15-20 hours to achieve a complete degree of vitrification, and thus obtaining the ceramic.

5. The application of the wear-resistant and crack-resistant ceramic glaze according to claim 4, characterized in that, The mass ratio of the glaze to the deionized water in the ceramic product is 6-7:5-8.

6. The application of the wear-resistant and crack-resistant ceramic glaze according to claim 4, characterized in that, The sintering temperature is 1250-1290℃.