Honeycomb bubble glaze and processing technology of glazed foamed ceramic
By using a honeycomb-shaped bubble glaze formula and controlling the firing process, the problem of existing bubble glazes being unable to present small and large pores has been solved, achieving a coexistence of large and small pores on the glaze surface.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-10
- Publication Date
- 2026-04-14
AI Technical Summary
Existing bubble glazes cannot simultaneously produce the foaming effect of small and large bubbles on the glaze surface, and there is a lack of relevant reports.
The honeycomb bubble glaze formula contains a specific ratio of base glaze, foaming agent and colorant, combined with a controlled firing process, including a reducing atmosphere and stepped heating, to generate bubbles of different sizes by utilizing the high-temperature decomposition of carbonates and the reaction of the foaming agent.
It achieves the coexistence of large and small pores on the glaze surface by controlling the decomposition of the foaming agent and the gas escape, forming a bubble structure of different sizes.
Smart Images
Figure CN121850374A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of ceramic technology, specifically to a honeycomb-shaped bubble glaze and a processing technology for foamed ceramic glaze. Background Technology
[0002] Glaze is a thin, glassy layer covering the surface of ceramic, enamel, and other ceramic bodies. It is obtained through grinding, glazing, and firing. Based on the different appearance characteristics after firing, glazes can be divided into transparent glazes, crackle glazes, crystalline glazes, opaque glazes, and foamed glazes. Foamed glaze, also called bubble glaze, is usually made from raw materials such as low-temperature molten metal, feldspar, kaolin, quartz, talc, foaming agents, and colorants. It is prepared through processes such as ball milling, glazing, and firing. The foaming mechanism of foamed glaze is that during the high-temperature melting process of the glaze, the foaming agent generates gas, which foams in the glaze melt. After cooling, a large number of open or closed bubbles are formed in the glaze layer, thus giving the glaze surface a foamed effect.
[0003] The size of bubbles in existing bubble glazes is mainly controlled by the amount of foaming agent used; the more foaming agent used, the larger the bubbles, and vice versa. However, there are no reports on achieving a foaming effect of both small and large bubbles on the glaze surface simultaneously. Summary of the Invention
[0004] The purpose of this invention is to provide a processing technology for honeycomb bubble glaze and glaze foamed ceramics, which can achieve a glaze foaming effect with both large and small pores.
[0005] To achieve the above-mentioned objectives, the technical solution adopted by this invention is as follows: The honeycomb-shaped bubble glaze comprises a base glaze, a foaming agent, and a colorant. The base glaze is composed of the following parts by weight: 45-50 parts low-temperature frit, 10-12 parts quartz, 10-12 parts glass powder, 20-25 parts calcium carbonate, 6-8 parts pyrophyllite, 6-8 parts kaolin, 4-6 parts talc, and 4-6 parts lithium carbonate. The colorant comprises 1.5-2.0 parts by weight, and the foaming agent comprises 7-8 parts by weight.
[0006] Preferably, the colorant is composed of the following components by weight: 0.5-0.8 parts copper oxide and 1-1.5 parts cobalt oxide.
[0007] Preferably, the foaming agent is silicon carbide or silicon-oxygen-carbon.
[0008] Preferably, the low-temperature fused block is composed of the following parts by weight: 35-40 parts quartz, 25-30 parts zinc silicate, 10-15 parts potassium feldspar, and 8-15 parts borax.
[0009] Preferably, the average particle size of the base glaze of the honeycomb bubble glaze is 200-250 mesh.
[0010] Preferably, the Baume degree of the honeycomb bubble glaze is in the range of 45-55.
[0011] The present invention further provides a processing technology for glazed foamed ceramics, which specifically includes the following steps: S1. Material preparation: Accurately weigh each component according to the formula of honeycomb bubble glaze, mix the base glaze and set aside, and mix the colorant and set aside; S2. Grinding: The base glaze from step S1 is loaded into a ball mill and ball-milled to the target particle size. The loading amount is 45%-50% of the ball mill volume. S3. After ball milling, add foaming agent and colorant, stir and mix, pour out and age to obtain glaze slurry; S4. Apply the glaze slurry to the surface of the body, allow it to dry naturally, and then fire it. The specific firing process is as follows: S41. Slowly raise the temperature to 400±50℃, and then control the atmosphere to be a reducing atmosphere; S42. Rapidly heat to 750±25℃, then control the heating rate to heat to 925±25℃, and control the firing time in the temperature range of 400±50℃ and 925±25℃ for 85±5min. S43. When the temperature reaches 925±25℃, the atmosphere is changed to an oxidizing atmosphere. The temperature is gradually increased to 1025±25℃ and 1110±10℃, and the temperature is held at the highest firing temperature for 60±20 minutes.
[0012] Preferably, the ratio of ball material to water in step S2 is 1:0.45-0.5:0.55-0.6.
[0013] Preferably, the heating rate in step S42, from 750±25℃ to 8℃ / min-10℃ / min, and the heating rate in step S42, from 925±25℃ to 3℃ / min-5℃ / min, are respectively.
[0014] Preferably, the heating rate in step S43 is 10℃ / min-12℃ / min for heating to 1025±25℃ and 3℃ / min-5℃ / min for heating to 1110±10℃. Compared with the prior art, the present invention has the following beneficial effects:
[0015] The foamed ceramic glaze of this invention uses a foaming glaze containing a foaming agent, silicon carbide or silicon-oxygen carbon, and carbonates. Calcium carbonate and lithium carbonate in the carbonates decompose at high temperatures in the range of 800-950°C under a reducing atmosphere, while silicon carbide or silicon-oxygen carbon does not react under a reducing atmosphere. By controlling the firing process conditions such as the firing steps and heating rate, most of the gases generated by the high-temperature decomposition of carbonates escape to form small bubbles, while a small portion of carbonates does not have time to decompose. Then, under the combined action of changing the atmosphere and heating to melt silicon dioxide at high temperatures, the carbonates that do not have time to decompose continue to decompose and release gases. These gases react with the nearby oxygen-activated foaming agent to generate foaming gases that merge and grow in the glaze melt until they break through the glaze surface to form large open bubbles. In the glaze surface with only silicon carbide or silicon-oxygen carbon but no undecomposed carbonates, smaller open bubbles are formed, thus presenting a foaming effect of coexisting large and small bubbles. Attached Figure Description
[0016] Figure 1 This is a partial schematic diagram of the glaze surface of the foamed ceramic prepared in Example 1 of the present invention. Detailed Implementation Example 1
[0017] This embodiment provides a processing technology for glazed foamed ceramics, which specifically includes the following steps: S1. Material preparation: Accurately weigh each component of the honeycomb bubble glaze according to the formula. The honeycomb bubble glaze includes the base glaze, foaming agent and colorant. Mix the base glaze and set aside. Mix the colorant and set aside.
[0018] The base glaze is composed of the following parts by weight: 45 parts low-temperature frit, 12 parts quartz, 12 parts glass powder, 25 parts calcium carbonate, 6 parts pyrophyllite, 6 parts kaolin, 5 parts talc, and 5 parts lithium carbonate; the low-temperature frit is composed of the following parts by weight: 40 parts quartz, 25 parts zinc silicate, 12 parts potassium feldspar, and 10 parts borax.
[0019] Wherein, the colorant comprises 0.6 parts by weight of copper oxide and 1.2 parts by weight of cobalt oxide.
[0020] Wherein: the foaming agent is 8 parts by weight of silicon carbide.
[0021] S2. Grinding: The base glaze material from step S1 is loaded into a ball mill and ball milled. The loading amount is 45% of the ball mill volume, the ball-to-material-to-water ratio is 1:0.45:0.55, the ball milling speed is 400 r / min, and the ball milling is carried out until the average particle size is 250 mesh.
[0022] S3. After ball milling, add foaming agent and colorant, stir and mix, pour out and age to obtain glaze slurry with a Baume degree range of 52.
[0023] S4. Apply the glaze slurry to the surface of the body. The sintering temperature of the body is similar to that of the glaze. After natural drying, fire the body. The specific firing process is as follows: S41. Slowly raise the temperature to 400℃ at a heating rate of 5℃ / min, and then control the atmosphere to a reducing atmosphere; S42. Rapidly raise the temperature to 750℃ at a heating rate of 10℃ / min, and then control the heating rate to 950℃ at a heating rate of 4℃ / min; S43. When the temperature reaches 950℃, switch to an oxidizing atmosphere, first rapidly raise the temperature to 1025℃ at a heating rate of 10℃ / min, and then slowly raise the temperature to 1120℃ at a heating rate of 4℃ / min. Hold the temperature at the highest firing temperature for 60 minutes. Example 2
[0024] This embodiment provides a processing technology for glazed foamed ceramics, which specifically includes the following steps: S1. Material preparation: Accurately weigh each component of the honeycomb bubble glaze according to the formula. The honeycomb bubble glaze includes the base glaze, foaming agent and colorant. Mix the base glaze and set aside. Mix the colorant and set aside.
[0025] The base glaze is composed of the following components by weight: 50 parts low-temperature frit, 10 parts quartz, 10 parts glass powder, 20 parts calcium carbonate, 8 parts pyrophyllite, 8 parts kaolin, 5 parts talc, and 6 parts lithium carbonate; the low-temperature frit is composed of the following components by weight: 38 parts quartz, 28 parts zinc silicate, 10 parts potassium feldspar, and 12 parts borax.
[0026] Wherein, the colorant comprises 0.6 parts by weight of copper oxide and 1.2 parts by weight of cobalt oxide.
[0027] Wherein: the foaming agent is 7 parts by weight of silicon-oxygen-carbon.
[0028] S2. Grinding: The basic glaze material from step S1 is loaded into a ball mill and ball milled. The loading amount is 50% of the ball mill volume, the ball-to-material-to-water ratio is 1:0.5:0.6, the ball milling speed is 450 r / min, and the ball milling is carried out until the average particle size is 200 mesh.
[0029] S3. After ball milling, add foaming agent and colorant, stir and mix, pour out and age to obtain glaze slurry with a Baume degree range of 48.
[0030] S4. Apply the glaze slurry to the surface of the body. The sintering temperature of the body is similar to that of the glaze firing temperature. After natural drying, fire the body. The specific firing process is as follows: S41. Slowly raise the temperature to 420℃ at a heating rate of 4℃ / min, and then control the atmosphere to a reducing atmosphere; S42. Rapidly raise the temperature to 725℃ at a heating rate of 8℃ / min, and then control the heating rate to 925℃ at a heating rate of 4℃ / min; S43. When the temperature reaches 925℃, switch to an oxidizing atmosphere, first rapidly raise the temperature to 1050℃ at a heating rate of 12℃ / min, and then slowly raise the temperature to 1120℃ at a heating rate of 3℃ / min. Hold the temperature at the highest firing temperature for 60 minutes.
[0031] The foregoing has shown and described the basic principles, main features and advantages of this invention. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from the spirit and scope of this invention. All such changes and modifications fall within the scope of this invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.
Claims
1. A honeycomb-shaped bubble glaze, comprising a base glaze, a foaming agent, and a colorant, characterized in that, The base glaze is composed of the following parts by weight: 45-50 parts low-temperature frit, 10-12 parts quartz, 10-12 parts glass powder, 20-25 parts calcium carbonate, 6-8 parts pyrophyllite, 6-8 parts kaolin, 4-6 parts talc, and 4-6 parts lithium carbonate; the colorant is 1.5-2.0 parts by weight; and the foaming agent is 7-8 parts by weight.
2. The honeycomb bubble glaze according to claim 1, characterized in that: The colorant is composed of the following parts by weight: 0.5-0.8 parts copper oxide and 1-1.5 parts cobalt oxide.
3. The honeycomb bubble glaze according to claim 1, characterized in that: The foaming agent is silicon carbide or silicon-oxygen-carbon.
4. The honeycomb bubble glaze according to claim 1, characterized in that: The low-temperature fused block is composed of the following parts by weight: 35-40 parts quartz, 25-30 parts zinc silicate, 10-15 parts potassium feldspar, and 8-15 parts borax.
5. The honeycomb bubble glaze according to claim 1, characterized in that: The base glaze of this honeycomb bubble glaze has an average particle size of 200-250 mesh.
6. The honeycomb bubble glaze according to claim 1, characterized in that: The glaze of this honeycomb bubble glaze has a Baume scale range of 45-55.
7. The processing technology of glazed foamed ceramics, characterized in that, Specifically, the steps include the following: S1. Material preparation: Accurately weigh each component according to the formula of honeycomb bubble glaze as described in any one of claims 1 to 4, mix the base glaze and set aside, and mix the colorant and set aside. S2. Grinding: The base glaze from step S1 is loaded into a ball mill and ball-milled to the target particle size. The loading amount is 45%-50% of the ball mill volume. S3. After ball milling, add foaming agent and colorant, stir and mix, pour out and age to obtain glaze slurry; S4. Apply the glaze slurry to the surface of the body, allow it to dry naturally, and then fire it. The specific firing process is as follows: S41. Slowly raise the temperature to 400±50℃, and then control the atmosphere to be a reducing atmosphere; S42. Rapidly heat to 750±25℃, then control the heating rate to heat to 925±25℃, and control the firing time in the temperature range of 400±50℃ and 925±25℃ for 85±5min. S43. When the temperature reaches 925±25℃, the atmosphere is changed to an oxidizing atmosphere. The temperature is gradually increased to 1025±25℃ and 1110±10℃, and the temperature is held at the highest firing temperature for 60±20 minutes.
8. The processing technology of glazed foamed ceramics according to claim 7, characterized in that: The ratio of ball material to water in step S2 is 1:0.45-0.5:0.55-0.
6.
9. The processing technology of glazed foamed ceramics according to claim 7, characterized in that: The heating rate in step S42, from 750±25℃ to 750±25℃, is 8℃ / min-10℃ / min, and the heating rate in step S42, from 925±25℃ to 925±25℃, is 3℃ / min-5℃ / min.
10. The processing technology of glazed foamed ceramics according to claim 7, characterized in that: The heating rate in step S43 is 10℃ / min-12℃ / min for heating to 1025±25℃ and 3℃ / min-5℃ / min for heating to 1110±10℃.