Ceramic glaze and preparation process

Abstract

The invention relates to the technical field of ceramic glaze preparation, in particular to a ceramic glaze and a preparation process thereof.The preparation process comprises the steps that raw materials for preparing the ceramic glaze are weighed according to the mass percent and dried for standby application; the preparation method comprises the following steps: sequentially putting petalite, calcite, quartz, talc, Suzhou soil and washed kaolin into a grinding machine for grinding and mixing, sieving after mixing, putting the obtained first powder, silicon dioxide, aluminum oxide, zirconium oxide and borax into a first ball mill for ball-milling and mixing, sieving after mixing, and then putting into a second ball mill for ball-milling and mixing; the second powder is subjected to high-temperature firing, water and low-expansion frits are added after firing to be mixed together, the prepared solvent is put into a second ball mill to be subjected to wet milling, glaze is obtained, then the glaze is subjected to dehydration treatment, and the needed ceramic glaze is obtained, so that the problem that in the preparation process of an existing ceramic glaze, due to the fact that a large number of low-expansion frits are added, the glaze cannot be sintered easily is effectively solved. The initial melting temperature is reduced, so that pinholes in the ceramic glaze surface are increased.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramic glaze preparation, and particularly relates to a ceramic glaze and a preparation process thereof. Background Art

[0002] Ceramic glaze is a suspension powder used on the surface of ceramic products. It can be applied to the surface of ceramic products by spraying, brushing or dipping. After firing, a hard glaze layer is formed to protect the ceramic surface and beautify the appearance of the ceramic. Existing ceramic glazes are usually made of ordinary materials, with a relatively large thermal expansion coefficient, a relatively high water absorption rate of the green body, insufficient strength, and prone to phenomena such as green body cracking and glaze peeling in an environment with a large temperature difference, resulting in a short service life of the product.

[0003] The prior art CN115784614A discloses a low-expansion ceramic glaze and a preparation method thereof. The ceramic glaze has a reasonable formula. By adding spodumene, zirconia, low-expansion frit, Suzhou clay and additives, the obtained ceramic glaze has high temperature resistance, a low expansion coefficient, and good adaptability between the green body and the glaze, greatly improving the strength, corrosion resistance and thermal shock resistance of ceramic products, etc. The preparation method of this ceramic glaze is simple, has good repeatability, is suitable for large-scale production and can obtain products with controllable quality.

[0004] However, when preparing the above-mentioned ceramic glaze, a large amount of low-expansion frit needs to be used. The use of these low-expansion frits will significantly reduce the initial melting temperature of the glaze, which is not conducive to the exhaust of the glaze during the high-temperature process, resulting in pinholes on the glaze surface after the first rapid firing of the product, and even open bubbles, which will seriously reduce the quality of the product. Summary of the Invention

[0005] The purpose of the present invention is to provide a ceramic glaze and a preparation process thereof, which solve the technical problem that when preparing the existing ceramic glaze, a large amount of low-expansion frit needs to be used. The use of these low-expansion frits will significantly reduce the initial melting temperature of the glaze, which is not conducive to the exhaust of the glaze during the high-temperature process, resulting in pinholes on the glaze surface after the first rapid firing of the product, and even open bubbles, which will seriously reduce the quality of the product.

[0006] To achieve the above purpose, in the first aspect, the present invention provides a preparation process of a ceramic glaze, including the following steps: Weigh the raw materials for preparing the ceramic glaze according to mass percentages and dry them separately for later use; Put spodumene, calcite, quartz, talc, Suzhou clay and washed kaolin into a grinder in sequence for grinding and mixing, and sieve after mixing to obtain a first powder with a uniform particle size; The obtained first powder is put into a first ball mill together with silicon dioxide, alumina, zirconia and borax for ball milling and mixing, and after mixing, it is sieved to obtain a second powder with a uniform particle size; The second powder is subjected to high-temperature firing, and after firing, water and a low-expansion frit are added and mixed together to prepare a solvent; The solvent is put into a second ball mill for wet milling to obtain a glaze, and then the glaze is dehydrated to obtain the required ceramic glaze.

[0007] Among them, the specific steps of weighing the raw materials for preparing the ceramic glaze according to mass percentages and drying them separately for standby are as follows: Weigh the raw materials for preparing the ceramic glaze according to 8-15 parts of spodumene, 10-20 parts of calcite, 15-25 parts of quartz, 4-8 parts of silicon dioxide, 3-5 parts of alumina, 4-8 parts of zirconia, 1-4 parts of low-expansion frit, 4-6 parts of borax, 5-8 parts of talc, 15-20 parts of Suzhou clay and 6-10 parts of washed kaolin; The weighed raw materials are respectively put into a dryer, and the dryer dries the raw materials and stores them separately for standby after drying.

[0008] Among them, the specific steps of putting spodumene, calcite, quartz, talc, Suzhou clay and washed kaolin into a grinder in sequence for grinding and mixing, and sieving after mixing to obtain a first powder with a uniform particle size are as follows: Put the dried spodumene, calcite, quartz, talc, Suzhou clay and washed kaolin into a grinder in sequence for grinding; After grinding, use a stirring rod to mix the powder obtained by grinding in the grinder, and sieve after mixing to obtain a first powder with a uniform particle size.

[0009] Among them, the specific steps of putting the obtained first powder into a first ball mill together with silicon dioxide, alumina, zirconia and borax for ball milling and mixing, and sieving after mixing to obtain a second powder with a uniform particle size are as follows: Put the obtained first powder into a first ball mill together with the dried silicon dioxide, alumina, zirconia and borax for ball milling; After ball milling, use a stirring rod to mix the powder obtained by ball milling in the first ball mill, and sieve after mixing to obtain a second powder with a uniform particle size.

[0010] Among them, the specific steps of subjecting the second powder to high-temperature firing, and adding water and a low-expansion frit for mixing after firing to prepare a solvent are as follows: Put the obtained second powder into a firing furnace for high-temperature firing, the firing temperature is 1200-1400 °C, and the firing time is 5-6 h; After firing, the fired second powder is crushed into granular substances by a high-pressure water stream, and then the granular substances are screened to obtain the required materials. Water and low-expansion frit are added to the obtained materials and mixed together to prepare a solvent.

[0011] In a second aspect, the present invention also provides a ceramic glaze, comprising the following weight components: 8-15 parts of spodumene, 10-20 parts of calcite, 15-25 parts of quartz, 4-8 parts of silicon dioxide, 3-5 parts of alumina, 4-8 parts of zirconia, 1-4 parts of low-expansion frit, 4-6 parts of borax, 5-8 parts of talc, 15-20 parts of Suzhou clay, and 6-10 parts of washed kaolin.

[0012] For a ceramic glaze and a preparation process thereof according to the present invention, in the preparation process of the ceramic glaze, since after grinding, pulverizing and mixing the raw materials, the raw material powder needs to be put into the firing furnace for high-temperature firing, the melting temperature of the prepared ceramic glaze can be reduced during the high-temperature firing process, and the flatness and glossiness of the glaze surface of the ceramic glaze can be increased. Therefore, only a small amount of low-expansion frit needs to be added during the preparation of the ceramic glaze, effectively solving the problem that in the preparation process of the existing ceramic glaze, due to the large addition of low-expansion frit, the initial melting temperature is reduced, and further the number of pinholes on the ceramic glaze surface increases. At the same time, it is easier to prepare a ceramic glaze with a flat surface, no defects and high glossiness, and the quality of the prepared ceramic glaze is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0014] Figure 1 is a flowchart of the process steps for preparing the ceramic glaze according to the first embodiment of the present invention.

[0015] Figure 2 is a specific flowchart of the process for preparing the ceramic glaze according to the first embodiment of the present invention, in which the raw materials for preparing the ceramic glaze are weighed according to the mass percentage and dried respectively for standby.

[0016] Figure 3 is a specific flowchart of the process for preparing the ceramic glaze according to the first embodiment of the present invention, in which spodumene, calcite, quartz, talc, Suzhou clay and washed kaolin are successively put into a grinding machine for grinding and mixing, and after mixing, they are sieved to obtain a first powder with a uniform particle size.

[0017] Figure 4It is a specific step diagram of the preparation process of the ceramic glaze in the first embodiment of the present invention, which involves putting the obtained first powder together with silica, alumina, zirconia, and borax into a first ball mill for ball milling and mixing, and then sieving after mixing to obtain a second powder with a uniform particle size.

[0018] Figure 5 It is a specific step diagram of the preparation process of the ceramic glaze in the first embodiment of the present invention, which involves subjecting the second powder to high-temperature firing, and then adding water and low-expansion frit together for mixing to prepare a solvent.

[0019] Figure 6 It is a specific step diagram of the preparation process of the ceramic glaze in the first embodiment of the present invention, which involves putting the solvent into a second ball mill for wet milling to obtain a glaze, and then dehydrating the glaze to obtain the required ceramic glaze.

[0020] Figure 7 It is a schematic diagram of the overall structure of the preparation equipment of the ceramic glaze in the second embodiment of the present invention.

[0021] In the figure: 101 - grinder, 102 - first ball mill, 103 - firing furnace, 104 - second ball mill, 105 - dryer. Specific embodiments

[0022] The following details the embodiments of the present invention. The examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] First embodiment: Please refer to Figures 1 to 6 , the present invention provides a preparation process of a ceramic glaze, including the following steps: S1. Weigh the raw materials for preparing the ceramic glaze according to the mass percentage, and dry them separately for later use.

[0024] Specifically, the specific steps of weighing the raw materials for preparing the ceramic glaze according to the mass percentage and drying them separately for later use are as follows: S11. Weigh the raw materials for preparing the ceramic glaze according to 8 - 15 parts of spodumene, 10 - 20 parts of calcite, 15 - 25 parts of quartz, 4 - 8 parts of silica, 3 - 5 parts of alumina, 4 - 8 parts of zirconia, 1 - 4 parts of low-expansion frit, 4 - 6 parts of borax, 5 - 8 parts of talc, 15 - 20 parts of Suzhou clay, and 6 - 10 parts of washed kaolin. S12. Put the weighed raw materials into the dryer 105 respectively, let the dryer 105 dry the raw materials, and store them separately for later use after drying.

[0025] S2. Sequentially put spodumene, calcite, quartz, talc, Suzhou clay, and washed kaolin into the grinder 101 for grinding and mixing, and then screen the mixture after mixing to obtain the first powder with a uniform particle size.

[0026] Specifically, the specific steps of sequentially putting spodumene, calcite, quartz, talc, Suzhou clay, and washed kaolin into the grinder 101 for grinding and mixing, and then screening the mixture after mixing to obtain the first powder with a uniform particle size are as follows: S21. Sequentially put the dried spodumene, calcite, quartz, talc, Suzhou clay, and washed kaolin into the grinder 101 for grinding; S22. After grinding, use a stirring rod to mix the powder obtained by grinding in the grinder 101, and then screen the mixture after mixing to obtain the first powder with a uniform particle size.

[0027] Specifically, the mixed powder is screened through a 100 - 200 mesh sieve, and the powder after screening is collected to obtain the first powder with a uniform particle size.

[0028] S3. Put the obtained first powder together with silicon dioxide, alumina, zirconia, and borax into the first ball mill 102 for ball milling and mixing, and then screen the mixture after mixing to obtain the second powder with a uniform particle size.

[0029] Specifically, the specific steps of putting the obtained first powder together with silicon dioxide, alumina, zirconia, and borax into the first ball mill 102 for ball milling and mixing, and then screening the mixture after mixing to obtain the second powder with a uniform particle size are as follows: S31. Put the obtained first powder together with the dried silicon dioxide, alumina, zirconia, and borax into the first ball mill 102 for ball milling; S32. After ball milling, use a stirring rod to mix the powder obtained by ball milling in the first ball mill 102, and then screen the mixture after mixing to obtain the second powder with a uniform particle size.

[0030] Specifically, the mixed powder is screened through a 50 - 100 mesh sieve, and the powder after screening is collected to obtain the second powder with a uniform particle size.

[0031] S4. Conduct high - temperature firing on the second powder, and after firing, add water and low - expansion frit and mix them together to prepare the solvent.

[0032] Specifically, the specific steps of conducting high - temperature firing on the second powder, and after firing, adding water and low - expansion frit and mixing them together to prepare the solvent are as follows: S41. Put the obtained second powder into the firing furnace 103 for high-temperature firing at a firing temperature of 1200 - 1400 °C and a firing time of 5 - 6 h; S42. After firing, crush the fired second powder into granular substances with high-pressure water flow, and then screen the granular substances to obtain the required materials; S43. Add water and low-expansion frit to the obtained materials and mix them together to prepare a solvent.

[0033] S5. Put the solvent into the second ball mill 104 for wet grinding to obtain glaze, and then dehydrate the glaze to obtain the required ceramic glaze.

[0034] Specifically, the specific steps of putting the solvent into the second ball mill 104 for wet grinding to obtain glaze, and then dehydrating the glaze to obtain the required ceramic glaze are as follows: S51. Put the prepared solvent into the second ball mill 104, and let the second ball mill 104 perform wet grinding on the solvent to obtain the initial glaze; S52. Import the glaze into a dehydrator for dehydration treatment, and export it after dehydration treatment to obtain the required ceramic glaze.

[0035] When using the preparation process of a kind of ceramic glaze in this embodiment, in the preparation process of the ceramic glaze adopted by the present invention, since after grinding, crushing and mixing the raw materials, it is necessary to put the raw material powder into the firing furnace 103 for high-temperature firing, which can reduce the melting temperature of the prepared ceramic glaze during the high-temperature firing process, increase the flatness and gloss of the glaze surface of the ceramic glaze, so that only a small amount of low-expansion frit needs to be added during the preparation of the ceramic glaze, effectively solving the problem that in the preparation process of the existing ceramic glaze, due to the large addition of low-expansion frit, the initial melting temperature is reduced, resulting in an increase in pinholes on the ceramic glaze surface. At the same time, it is easier to prepare a ceramic glaze with a flat surface, no defects and high gloss, and ensures the quality of the prepared ceramic glaze.

[0036] Second embodiment: On the basis of the first embodiment, please refer to Figure 7 , the present invention also provides a preparation device for ceramic glaze, including a grinder 101, a first ball mill 102, a firing furnace 103 and a second ball mill 104.

[0037] In this embodiment, through the combined use of the grinder 101, the first ball mill 102, the firing furnace 103 and the second ball mill 104, a super-low gloss matte glaze with a smooth and delicate feel can be prepared.

[0038] Among them, the grinder 101, the first ball mill 102, the firing furnace 103, and the second ball mill 104 are arranged on the ground in sequence from left to right; the grinder 101 is used to grind and mix the raw materials for preparing ceramic glaze, and after mixing, sieve them to obtain the first powder with uniform particle size; the first ball mill 102 is used to ball mill and mix the prepared first powder with other raw materials, and after mixing, sieve them to obtain the second powder with uniform particle size; the firing furnace 103 is used to conduct high-temperature firing on the prepared second powder, and after firing, add water and low-expansion frit and mix them together to prepare a solvent; the second ball mill 104 is used to wet grind the prepared solvent, and then dehydrate the obtained glaze to obtain the required ceramic glaze.

[0039] Secondly, before putting the raw materials for preparing ceramic glaze into the grinder 101 for grinding, it is necessary to weigh the raw materials for preparing ceramic glaze according to 8 - 15 parts of spodumene, 10 - 20 parts of calcite, 15 - 25 parts of quartz, 4 - 8 parts of silicon dioxide, 3 - 5 parts of alumina, 4 - 8 parts of zirconia, 1 - 4 parts of low-expansion frit, 4 - 6 parts of borax, 5 - 8 parts of talc, 15 - 20 parts of Suzhou clay, and 6 - 10 parts of washed kaolin. Then put the weighed raw materials into the dryer 105 respectively, let the dryer 105 dry the raw materials, and store them separately for later use after drying.

[0040] When using the preparation equipment for a kind of ceramic glaze in this embodiment, through the combined use of the dryer 105, the grinder 101, the first ball mill 102, the firing furnace 103, and the second ball mill 104, a matte ceramic glaze with ultra-low gloss, smooth and delicate hand feeling can be prepared.

[0041] Third Embodiment: On the basis of the second embodiment, the present invention also provides a kind of ceramic glaze, including the following weight components: 8 - 15 parts of spodumene, 10 - 20 parts of calcite, 15 - 25 parts of quartz, 4 - 8 parts of silicon dioxide, 3 - 5 parts of alumina, 4 - 8 parts of zirconia, 1 - 4 parts of low-expansion frit, 4 - 6 parts of borax, 5 - 8 parts of talc, 15 - 20 parts of Suzhou clay, 6 - 10 parts of washed kaolin.

[0042] When using a kind of ceramic glaze in this embodiment, through the addition of zirconia, low-expansion frit, and Suzhou clay, the prepared ceramic glaze has high temperature resistance, low expansion coefficient, and good adaptability between the body and the glaze, thus greatly improving the strength, corrosion resistance, and thermal shock resistance of ceramic products.

[0043] The above disclosure is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A preparation process of a ceramic glaze, characterized in that, It includes the following steps: Weigh the raw materials for preparing the ceramic glaze according to the mass percentage, and dry them separately for later use; Put spodumene, calcite, quartz, talc, Suzhou clay and washed kaolin into a grinder in sequence for grinding and mixing, and sieve after mixing to obtain the first powder with uniform particle size; Put the obtained first powder together with silica, alumina, zirconia and borax into a first ball mill for ball milling and mixing, and sieve after mixing to obtain the second powder with uniform particle size; Carry out high-temperature firing on the second powder, and add water and low-expansion frit together for mixing after firing to prepare the solvent; Put the solvent into a second ball mill for wet grinding to obtain the glaze, and then carry out dehydration treatment on the glaze to obtain the required ceramic glaze; The specific steps of weighing the raw materials for preparing the ceramic glaze according to the mass percentage and drying them separately for later use are as follows: Weigh the raw materials for preparing the ceramic glaze according to 8-15 parts of spodumene, 10-20 parts of calcite, 15-25 parts of quartz, 4-8 parts of silica, 3-5 parts of alumina, 4-8 parts of zirconia, 1-4 parts of low-expansion frit, 4-6 parts of borax, 5-8 parts of talc, 15-20 parts of Suzhou clay and 6-10 parts of washed kaolin; Put the weighed raw materials into a dryer respectively, let the dryer dry the raw materials, and store them separately for later use after drying.

2. The preparation process of the ceramic glaze according to claim 1, characterized in that: The specific steps of putting spodumene, calcite, quartz, talc, Suzhou clay and washed kaolin into a grinder in sequence for grinding and mixing, and sieve after mixing to obtain the first powder with uniform particle size are as follows: Put the dried spodumene, calcite, quartz, talc, Suzhou clay and washed kaolin into a grinder in sequence for grinding; After grinding, use a stirring rod to mix the powder ground in the grinder, and sieve after mixing to obtain the first powder with uniform particle size.

3. The preparation process of the ceramic glaze according to claim 1, characterized in that: The specific steps of putting the obtained first powder together with silica, alumina, zirconia and borax into a first ball mill for ball milling and mixing, and sieve after mixing to obtain the second powder with uniform particle size are as follows: Put the obtained first powder together with the dried silica, alumina, zirconia and borax into a first ball mill for ball milling; After ball milling, use a stirring rod to mix the powder ball milled in the first ball mill, and sieve after mixing to obtain the second powder with uniform particle size.

4. The preparation process of the ceramic glaze according to claim 1, characterized in that: The specific steps of carrying out high-temperature firing on the second powder, and adding water and low-expansion frit together for mixing after firing to prepare the solvent are as follows: Put the obtained second powder into a firing furnace for high-temperature firing, the firing temperature is 1200-1400 °C, and the firing time is 5-6 h; After firing, use high-pressure water flow to crush the fired second powder into granular substances, and then screen the granular substances to obtain the required materials; Water and low-expansion frit are added to the obtained material and mixed together to prepare a solvent.

5. A ceramic glaze is applied to the preparation process of the ceramic glaze described in any one of claims 1 to 4, and is characterized in that: It includes the following weight components: 8-15 parts of petalite, 10-20 parts of calcite, 15-25 parts of quartz, 4-8 parts of silicon dioxide, 3-5 parts of alumina, 4-8 parts of zirconia, 1-4 parts of low-expansion frit, 4-6 parts of borax, 5-8 parts of talc, 15-20 parts of Suzhou clay, and 6-10 parts of washed kaolin.

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