Kiln-changed glaze and method for making kiln-changed glaze ceramics

Abstract

This invention discloses a kiln-changed glaze and a method for producing kiln-changed glazed ceramics, belonging to the field of ceramic technology. The base glaze comprises the following components: Longyan kaolin, shale, dolomite, albite, silica, barium carbonate, and cordierite; the top glaze comprises the following components: yttrium oxide, iron oxide, aluminum oxide, borax, periclase, silica, and bentonite. The resulting kiln-changed glaze meets the production needs of ceramic companies. When used to produce kiln-changed glazed ceramic products, it can be integrated with existing equipment and can be mass-produced.

Description

Technical Field

[0001] The invention belongs to the technical field of ceramics, and in particular relates to a kiln-changed glaze and a method for making kiln-changed glaze ceramics. Background Art

[0002] Kiln-fired glazes are highly favored by designers and consumers for their variable glaze effects. This effect is generally achieved in two ways: one is to design the glaze in conjunction with the changes in the firing atmosphere, and the other is to complete the effect by superimposing a base glaze and a top glaze.

[0003] The Chinese invention patent application number is 202311138061.X, which discloses a kiln-changed purple-red glaze. In order to improve the wear resistance of porcelain and solve the problem of easy contamination and breeding of bacteria, it mainly utilizes the characteristics of modified diatomaceous earth and combines other raw materials to improve the wear resistance, easy cleaning and antibacterial properties of the kiln-changed purple-red glaze.

[0004] However, a careful analysis of its entire technical means reveals that its modification of diatomaceous earth and other processing of raw materials is relatively complicated. In the actual production of ceramic enterprises, it is not easy to produce in large quantities, and only valuable products can be produced in small quantities.

[0005] Therefore, it is necessary to design a kiln-changed glaze that meets the production needs of ceramic companies. When using it to prepare kiln-changed glaze ceramic products, it can fit the company's current equipment and can be produced in large quantities. Summary of the Invention

[0006] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a kiln-changed glaze that meets the production needs of ceramic enterprises. When using it to prepare kiln-changed glaze ceramic products, it can fit the company's current equipment and can be produced in large quantities.

[0007] The present invention adopts the following technical solutions:

[0008] Kiln-fired glaze includes a base glaze and a top glaze, wherein the base glaze includes the following components in parts by mass: 12 to 17 parts of Longyan kaolin, 4 to 7 parts of shale, 8 to 10 parts of dolomite, 10 to 13 parts of albite, 10 to 14 parts of silicon oxide, 2 to 4 parts of barium carbonate, and 5 to 8 parts of cordierite.

[0009] Furthermore, the top glaze comprises the following components in parts by mass: 8 to 12 parts of yttrium oxide, 6 to 9 parts of iron oxide, 9 to 11 parts of aluminum oxide, 6 to 8 parts of borax, 10 to 12 parts of periclase, 7 to 11 parts of silicon oxide, and 9 to 13 parts of bentonite.

[0010] The method for preparing a ceramic product with kiln-changed glaze using the kiln-changed glaze comprises the following steps:

[0011] Step 1: Prepare base glaze and top glaze;

[0012] Step 2: Apply base glaze and fire once;

[0013] Step 3: Apply glaze, fire for the second time, and cool to obtain kiln-changed glaze ceramic products.

[0014] Furthermore, the process of preparing the base glaze is as follows: according to the mass fraction, all the components of the base glaze are mixed, crushed, ball-milled, and water is added to prepare the base glaze;

[0015] The process for preparing the glaze water is as follows: according to the mass parts, all the components of the glaze material are mixed, crushed, ball-milled, and water is added to prepare the glaze water.

[0016] Furthermore, in step one, when preparing the base glaze and the top glaze, the ball milling process of both is based on a mass ratio of material: ethanol: ball = 2:1.5~1.6:1.5, a ball milling speed of 330~350r / min, and a ball milling time of 24~36h.

[0017] Furthermore, in step 1, the base glaze is ball-milled and then passed through a 170-200 mesh sieve, and the top glaze is ball-milled and then passed through a 250-300 mesh sieve.

[0018] Furthermore, in step 2, a base glaze is applied on the surface of the ceramic body, wherein the Baume degree of the base glaze is 43-45 and the thickness of the base glaze is 0.1-0.2 mm.

[0019] Furthermore, in step 3, the Baume degree of the glaze is 46-48, and the thickness of the glaze is 0.2-0.3 mm.

[0020] Furthermore, in step 2, during the primary firing, the temperature is raised to 500-600° C. at a heating rate of 1.2-1.4° C. / min, and then the temperature is lowered to 40-45° C. before applying the top glaze.

[0021] Furthermore, in step three, during the secondary firing, the temperature is raised to 1250-1290° C. at a heating rate of 1.3-1.6° C. / min, and then kept constant at that temperature for 2-3 hours. After natural cooling, the kiln-changed glaze ceramic product is obtained.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] First, in order to improve the characteristics of the glaze, silicon oxide is added to both the base glaze and the top glaze to improve the mechanical properties of the glaze. Yttrium oxide, periclase and bentonite are also added to the top glaze to increase the strength of the glaze layer.

[0024] Secondly, the kiln-changed glaze of the present invention is composed of a base glaze and a surface glaze. In order to increase the non-specificity of the kiln-changed glaze, the components of the base glaze and the surface glaze are almost different, thereby producing more distinctive glaze surfaces.

[0025] Third, in order to further improve the effect of the base glaze and the surface glaze during firing, the particle sizes of the base glaze and the surface glaze are different, and the Baume degree of the glaze produced is also different. After applying the base glaze, the temperature is raised to 500~600℃ at a heating rate of 1.2~1.4℃ / min, and then cooled to 40~45℃ before applying the surface glaze. This can improve the viscosity between the final fired kiln-fired glaze layer and the ceramic body, and improve the strength of the kiln-fired glaze layer. DETAILED DESCRIPTION

[0026] The raw materials used in the present invention are all commercially available products. Example 1

[0027] Kiln-fired glazes include base glazes and top glazes.

[0028] The base glaze includes the following components by mass: 12 parts of Longyan kaolin, 4 parts of shale, 8 parts of dolomite, 10 parts of albite, 10 parts of silicon oxide, 2 parts of barium carbonate, and 5 parts of cordierite.

[0029] The top glaze material includes the following components in parts by mass: 8 parts of yttrium oxide, 6 parts of iron oxide, 9 parts of aluminum oxide, 6 parts of borax, 10 parts of periclase, 7 parts of silicon oxide, and 9 parts of bentonite.

[0030] The method for preparing a ceramic product with kiln-changed glaze using a kiln-changed glaze comprises the following steps:

[0031] Step 1: Prepare the base glaze and top glaze:

[0032] Mix all the base glaze components by weight, crush them, ball-mill them, and add water to create a base glaze. During the ball-milling process, use a mass ratio of 2:1.5:1.5 for base glaze: ethanol, at a speed of 330 rpm for 24 hours. After ball-milling, pass the mixture through a 170-mesh sieve. The base glaze has a Baume degree of 43.

[0033] Combine all components of the top glaze by weight, crush them, ball-mill them, and add water to prepare the top glaze. During the ball-milling process, use a mass ratio of material: ethanol: balls of 2:1.5:1.5, a speed of 330 rpm, and a milling time of 24 hours. After ball-milling, filter the mixture through a 250-mesh sieve. Prepare the top glaze to a degree Baume of 46.

[0034] Step 2: Apply base glaze and fire once:

[0035] Apply bottom glaze on the surface of the ceramic body with a thickness of 0.1 mm. During the first firing, heat the body to 500°C at a heating rate of 1.2°C / min, then cool the body to 40°C before applying top glaze.

[0036] Step 3: When applying the top glaze, the thickness of the top glaze is 0.2 mm, followed by secondary firing, heating to 1250°C at a heating rate of 1.3°C / min, and then keeping the temperature constant for 2 hours. After natural cooling, the kiln-changed glaze ceramic product is obtained. Example 2

[0037] Kiln-fired glazes include base glazes and top glazes.

[0038] The base glaze includes the following components by mass: 17 parts of Longyan kaolin, 7 parts of shale, 10 parts of dolomite, 13 parts of albite, 14 parts of silicon oxide, 4 parts of barium carbonate, and 8 parts of cordierite.

[0039] The top glaze material includes the following components in parts by mass: 12 parts of yttrium oxide, 9 parts of iron oxide, 11 parts of aluminum oxide, 8 parts of borax, 12 parts of periclase, 11 parts of silicon oxide, and 13 parts of bentonite.

[0040] The method for preparing a ceramic product with kiln-changed glaze using a kiln-changed glaze comprises the following steps:

[0041] Step 1: Prepare the base glaze and top glaze:

[0042] Mix all the base glaze components by weight, crush them, ball-mill them, and add water to create a base glaze. During the ball-milling process, use a mass ratio of material: ethanol: balls of 2:1.6:1.5, a speed of 350 r / min, and a milling time of 36 hours. After ball-milling, filter through a 200-mesh sieve. Prepare a base glaze with a Baume degree of 45.

[0043] Mix all components of the top glaze by weight, crush them, ball-mill them, and add water to prepare the top glaze. During the ball-milling process, use a mass ratio of material: ethanol: balls = 2:1.6:1.5, a speed of 350 r / min, and a milling time of 36 hours. After ball-milling, pass the mixture through a 300-mesh sieve. The top glaze is then prepared to a degree Baume of 48.

[0044] Step 2: Apply base glaze and fire once:

[0045] Apply bottom glaze on the surface of the ceramic body. The thickness of the bottom glaze is 0.2 mm. During the first firing, the temperature is increased to 600°C at a heating rate of 1.4°C / min, and then cooled to 45°C before applying the top glaze.

[0046] Step 3: When applying the top glaze, the thickness of the top glaze is 0.3 mm, followed by secondary firing, heating to 1290°C at a heating rate of 1.6°C / min, and then keeping the temperature constant for 3 hours. After natural cooling, the kiln-changed glaze ceramic product is obtained. Example 3

[0047] Kiln-fired glazes include base glazes and top glazes.

[0048] The base glaze includes the following components by mass: 15 parts of Longyan kaolin, 5 parts of shale, 9 parts of dolomite, 12 parts of albite, 13 parts of silicon oxide, 3 parts of barium carbonate, and 7 parts of cordierite.

[0049] The top glaze material includes the following components in parts by mass: 11 parts of yttrium oxide, 8 parts of iron oxide, 10 parts of aluminum oxide, 7 parts of borax, 11 parts of periclase, 10 parts of silicon oxide, and 11 parts of bentonite.

[0050] The method for preparing a ceramic product with kiln-changed glaze using a kiln-changed glaze comprises the following steps:

[0051] Step 1: Prepare the base glaze and top glaze:

[0052] Mix all the base glaze components by weight, crush them, ball-mill them, and add water to create a base glaze. During the ball-milling process, use a mass ratio of material: ethanol: balls of 2:1.6:1.5, a speed of 340 rpm, and a milling time of 28 hours. After ball-milling, filter the mixture through a 200-mesh sieve. The base glaze is then prepared with a Baume degree of 44.

[0053] Mix all components of the top glaze by weight, crush them, ball-mill them, and add water to prepare the top glaze. During the ball-milling process, use a mass ratio of material: ethanol: balls of 2:1.6:1.5, a speed of 340 rpm, and a milling time of 28 hours. After ball-milling, filter the mixture through a 300-mesh sieve. The top glaze is then prepared to a degree Baume of 47.

[0054] Step 2: Apply base glaze and fire once:

[0055] Apply bottom glaze on the surface of the ceramic body. The thickness of the bottom glaze is 0.2 mm. During the first firing, the temperature is increased to 550°C at a heating rate of 1.3°C / min, and then the temperature is lowered to 43°C before applying the top glaze.

[0056] Step 3: When applying the top glaze, the thickness of the top glaze is 0.2 mm, followed by secondary firing, heating to 1270°C at a heating rate of 1.5°C / min, and then keeping the temperature constant for 2.5 hours. After natural cooling, the kiln-changed glaze ceramic product is obtained.

[0057] The kiln-changed glaze ceramic products prepared in Examples 1 to 3 above were tested, and the lead and chromium dissolution amounts all met the national standard requirements. In the crack resistance test, no cracks were found after 7 cycles, and the wear resistance test reached level 4 or above, with high gloss.

[0058] At the same time, the kiln-fired glaze produced meets the production needs of ceramic companies. When using it to prepare kiln-fired glaze ceramic products, it can fit the company's current equipment and can be produced in large quantities.

[0059] The above is a preferred embodiment of the present invention. It should be noted that those skilled in the art will recognize that the base and top glazes of Examples 1-3 can be applied by spraying, dipping, or other conventional glazing methods. Various improvements and modifications may be made without departing from the principles of the present invention, and such improvements and modifications are also considered within the scope of protection of the present invention.

Claims

1. Kiln-changed glaze, characterized in that: The invention comprises a base glaze and a top glaze, wherein the base glaze comprises the following components by weight: 12 to 17 parts of Longyan kaolin, 4 to 7 parts of shale, 8 to 10 parts of dolomite, 10 to 13 parts of albite, 10 to 14 parts of silicon oxide, 2 to 4 parts of barium carbonate, and 5 to 8 parts of cordierite; The top glaze comprises the following components in parts by mass: 8-12 parts of yttrium oxide, 6-9 parts of iron oxide, 9-11 parts of aluminum oxide, 6-8 parts of borax, 10-12 parts of periclase, 7-11 parts of silicon oxide, and 9-13 parts of bentonite.

2. A method for preparing a ceramic product with a kiln-changed glaze using the kiln-changed glaze according to claim 1, characterized in that: The steps include: Step 1: Prepare base glaze and top glaze; Step 2: Apply base glaze and fire once; Step 3: Apply glaze, fire for the second time, and cool to obtain kiln-changed glaze ceramic products.

3. The method for preparing kiln-changed glaze ceramic products according to claim 2, characterized in that: The process for preparing the base glaze water is as follows: all the components of the base glaze material are mixed, crushed, ball-milled, and water is added to prepare the base glaze water; The process for preparing the glaze water is as follows: according to the mass parts, all the components of the glaze material are mixed, crushed, ball-milled, and water is added to prepare the glaze water.

4. The method for preparing kiln-changed glaze ceramic products according to claim 3, characterized in that: In step 1, when preparing the base glaze and the top glaze, the ball milling process of both is based on a mass ratio of material: ethanol: ball = 2:1.5~1.6:1.5, a ball milling speed of 330~350r / min, and a ball milling time of 24~36h.

5. The method for preparing kiln-changed glaze ceramic products according to claim 3, characterized in that: In step 1, the base glaze is ball-milled and then passed through a 170-200 mesh sieve, and the top glaze is ball-milled and then passed through a 250-300 mesh sieve.

6. The method for preparing kiln-changed glaze ceramic products according to claim 3, characterized in that: In step 2, a base glaze is applied on the surface of the ceramic body, wherein the base glaze has a Baume degree of 43-45 and a thickness of 0.1-0.2 mm.

7. The method for preparing kiln-changed glaze ceramic products according to claim 3, characterized in that: In step 3, the Baume degree of the glaze is 46-48, and the thickness of the glaze is 0.2-0.3 mm.

8. The method for preparing kiln-changed glaze ceramic products according to claim 3, characterized in that: In step 2, during the primary firing, the temperature is raised to 500-600° C. at a heating rate of 1.2-1.4° C. / min, and then the temperature is lowered to 40-45° C. before applying the top glaze.

9. The method for preparing kiln-changed glaze ceramic products according to claim 3, characterized in that: In step three, during the secondary firing, the temperature is raised to 1250-1290° C. at a heating rate of 1.3-1.6° C. / min, and then kept constant at this temperature for 2-3 hours. After natural cooling, the kiln-changed glaze ceramic product is obtained.