Ceramic wine bottle inner glaze and preparation method

Abstract

The present invention relates to a ceramic wine bottle inner glaze and a preparation method thereof. The ceramic wine bottle inner glaze is calculated by weight and includes: 30-50 parts of quartz, 25-50 parts of potassium feldspar, 16-32 parts of calcite, 12-24 parts of talc, 8-16 parts of metal composite powder, 5-10 parts of colorant, 1.2-3.6 parts of tackifier and 30-40 parts of deionized water. The present invention prepares an inner glaze that can be used for ceramic wine bottles. In addition to including main raw materials such as quartz, potassium feldspar, calcite, and talc, the inner glaze composition also includes metal composite powder as a reinforcing material, and further adds some colorant. The inner glaze prepared by the present invention is not only uniform and smooth on the ceramic wine bottle, but also has strong adhesion and high strength, is not prone to cracks, can well prevent wine leakage, and maintain the freshness and mouthfeel of the wine.

Description

Technical Field

[0001] The invention relates to the field of ceramic materials, and in particular to an inner glaze for a ceramic wine bottle and a preparation method thereof. Background Art

[0002] Traditional wine bottles are generally made of glass, which has the disadvantages of high firing temperatures and high energy consumption. Therefore, ceramic bottles are now commonly used for wine packaging. Ceramic bottles have unique advantages. On the one hand, their opacity prevents chemical reactions in the liquor caused by light, thus ensuring its quality. On the other hand, ceramic bottles conduct heat more slowly than glass bottles, ensuring the liquor's temperature is maintained and preventing deterioration in low or high temperature environments. In addition, ceramic bottles have the characteristics of promoting aging and a variety of decorative appearances. They serve not only as wine containers but also as decorations. In particular, the unique decorative effects created by glazing are not embodied by glass bottles. As a result, ceramic bottles are gradually replacing glass bottles as the main container for wine packaging. They are gaining increasing attention in the packaging of alcoholic beverages, especially liquor, and are now used in ceramic bottles for a large number of famous liquors.

[0003] Currently, ceramic wine bottles on the market come in two types: glazed and unglazed. Unglazed bottles are fired without any internal coating, leaving the wine in direct contact with the bottle. Glazed bottles are coated on the inside of the jar and then fired at high temperatures, creating a transparent, vitrified coating that protects the jar and prevents leakage. This glaze ensures a smooth, sterile, corrosion-resistant, and easy-to-clean surface, preserving the wine's freshness and flavor while preventing leakage and oxidation.

[0004] However, the inner glaze surface of ceramic wine bottles currently has problems such as poor adhesion of the glaze slurry, uneven glaze layer, and easy cracking after drying. As a result, the inner glaze surface not only fails to prevent the wine from leaking, but also some glaze will fall into the wine, affecting the quality of the wine. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a ceramic wine bottle inner glaze and a preparation method.

[0006] The purpose of the present invention is achieved by adopting the following technical solutions:

[0007] In a first aspect, the present invention provides a ceramic wine bottle inner glaze, which comprises, calculated by weight:

[0008] 30-50 parts of quartz stone, 25-50 parts of potassium feldspar, 16-32 parts of calcite, 12-24 parts of talc, 8-16 parts of metal composite powder, 5-10 parts of colorant, 1.2-3.6 parts of tackifier and 30-40 parts of deionized water.

[0009] Preferably, the purity of the quartz stone is higher than 99.9%, and the particle size is 10-20 μm.

[0010] Preferably, the purity of the potassium feldspar is higher than 99%, and the particle size is 10-20 μm.

[0011] Preferably, the purity of the calcite is higher than 99.5%, and the particle size is 10-20 μm.

[0012] Preferably, the purity of the talc is higher than 99% and the particle size is 10-20 μm.

[0013] Preferably, the colorant is one or a combination of titanium dioxide, magnesium oxide, iron oxide, and calcium borate.

[0014] Preferably, the viscosity enhancer is one or a combination of sodium carboxymethyl cellulose, sodium hydroxyethyl cellulose, polyacrylamide, and polyvinyl alcohol.

[0015] Preferably, the method for preparing the metal composite powder comprises:

[0016] S1. Mix iridium trichloride (IrCl3) and scandium trichloride (ScCl3) in deionized water, stir thoroughly until uniform, then add ammonia water dropwise, stir in an ice-water bath for 5-10 hours, then warm to room temperature, continue stirring for 1-2 hours, filter out the precipitate, wash with water until the washing liquid is neutral, and vacuum dry to obtain a composite complex;

[0017] S2. Mixing the composite complex and tricalcium phosphate (Ca3(PO4)2) into a ball mill, and performing ball milling treatment under inert protection to obtain a composite product;

[0018] S3. Sintering the composite product in a muffle furnace to obtain metal composite powder.

[0019] More preferably, in S1, the mass volume ratio of iridium trichloride, scandium trichloride and deionized water is (0.3-0.6) g: (0.15-0.3) g: (10-20) mL.

[0020] More preferably, in said S1, the mass fraction of ammonia water is 20%-30%, and the added amount is 10%-20% of the volume of deionized water.

[0021] More preferably, in S2, the mass ratio of the composite complex to tricalcium phosphate is 1:2.3-4.6.

[0022] More preferably, in S2, the ball milling speed is 350-450 r / min, the ball milling time is 3-6 h, and the ball-to-material ratio is 6-10:1.

[0023] More preferably, in S3, the sintering temperature is 400-500° C., and the sintering time is 2-4 hours.

[0024] In a second aspect, the present invention provides a method for preparing the inner glaze of a ceramic wine bottle, comprising the following steps:

[0025] The first step is to weigh the thickener and deionized water according to parts by weight, mix them thoroughly and evenly to obtain a dispersion;

[0026] In the second step, quartz, potassium feldspar, calcite, talc, metal composite powder and colorant are weighed according to weight and added to the dispersion liquid of the first step to obtain a raw material mixed liquid;

[0027] The third step is to fully mix the raw material mixture in the second step until it is uniform to obtain the inner glaze slurry;

[0028] The fourth step is to glaze the inner surface of the ceramic wine bottle body with the inner glaze slurry, and then bake it in a high-temperature furnace to form the inner glaze of the ceramic wine bottle.

[0029] Preferably, the calcination process is: first heating to 700-800°C at a rate of 2-4°C / min, then heating to 850-950°C at a rate of 1-2°C / min, keeping the temperature for 20-30 minutes, and then cooling to room temperature with the furnace.

[0030] The beneficial effects of the present invention are:

[0031] 1. The present invention prepares an inner glaze for ceramic wine bottles. This inner glaze comprises, in addition to primary raw materials such as quartz, potassium feldspar, calcite, and talc, a metal composite powder as a reinforcing material, and a colorant. The inner glaze not only adheres evenly and smoothly to the ceramic wine bottle, but also exhibits strong adhesion, high strength, and resistance to cracking. It effectively prevents wine leakage and maintains the wine's freshness and flavor.

[0032] 2. The metal composite powder added to the inner glaze composition of the present invention is prepared from a composite metal salt of iridium and scandium. This is first subjected to a complexation treatment with ammonia water, then to a complexation treatment with tricalcium phosphate, and finally to high-temperature sintering. During the preparation process, the iridium ions and scandium ions form an insoluble metal complex in the ammonia water. This complex is then collected and ball-milled with tricalcium phosphate to form a tricalcium phosphate / complex composite product. This product is then subjected to a high-temperature sintering treatment (400-500°C) to form a composite material of the iridium and scandium metal oxides and tricalcium phosphate.

[0033] 3. In the process of forming the inner glaze layer, the glaze needs to undergo a higher temperature baking treatment (850-950°C). During this process, ordinary tricalcium phosphate will slightly decompose and produce bubbles, resulting in an unsmooth glaze surface. However, using the metal composite powder prepared by the present invention to replace the traditional tricalcium phosphate can greatly slow down the generation of bubbles, thereby increasing the density and glossiness of the glaze surface.

[0034] 4. Compared with single iridium or scandium elements, the metal composite powder formed by the present invention using a certain proportion of iridium and scandium complexes and tricalcium phosphate has better strength and wear resistance and is less prone to cracks, indicating that a benign synergistic coordination is formed between iridium and scandium, which may be related to the formation of a composite sesquioxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The present invention is further described with reference to the accompanying drawings. However, the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other drawings based on the following drawings without creative effort.

[0036] Figure 1 This is a product comparison diagram of the inner glaze of ceramic wine bottles prepared in Example 1 of the present invention and Comparative Example 3. DETAILED DESCRIPTION

[0037] In order to better understand the above technical solutions, exemplary embodiments of the present invention are described in more detail below. Although exemplary embodiments of the present invention are shown, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0038] The present invention will be further described below with reference to the following examples. Example 1

[0039] A ceramic wine bottle inner glaze, the ingredients calculated by weight comprising:

[0040] 40 parts of quartz stone, 38 parts of potassium feldspar, 24 parts of calcite, 18 parts of talc, 12 parts of metal composite powder, 8 parts of titanium dioxide, 2.4 parts of sodium carboxymethyl cellulose and 35 parts of deionized water.

[0041] The purity of quartz stone is higher than 99.9%, and the particle size is 10-20μm; the purity of potassium feldspar is higher than 99%, and the particle size is 10-20μm; the purity of calcite is higher than 99.5%, and the particle size is 10-20μm; the purity of talc is higher than 99%, and the particle size is 10-20μm.

[0042] The preparation method of the metal composite powder includes:

[0043] S1. Iridium trichloride (IrCl3) and scandium trichloride (ScCl3) were mixed in deionized water in a mass volume ratio of 0.45 g:0.22 g:15 mL of iridium trichloride, scandium trichloride, and deionized water. The mixture was stirred until uniform, and then 25% ammonia water was added dropwise in an amount of 15% of the volume of deionized water. The mixture was stirred in an ice-water bath for 8 h, then warmed to room temperature and stirred for 1.5 h. The precipitate was filtered out, washed with water until the washing liquid was neutral, and vacuum dried to obtain a composite complex.

[0044] S2. Mixing the composite complex and tricalcium phosphate (Ca3(PO4)2) into a ball mill at a mass ratio of 1:3.5, and ball milling under inert protection at a ball milling speed of 400 r / min, a ball milling time of 5 h, and a ball-to-material ratio of 8:1 to obtain a composite product;

[0045] S3. The composite product is sintered in a muffle furnace at a temperature of 450° C. for 3 h to obtain a metal composite powder.

[0046] The method for preparing the inner glaze of the ceramic wine bottle comprises the following steps:

[0047] The first step is to weigh sodium carboxymethyl cellulose and deionized water according to parts by weight, and mix them thoroughly to obtain a dispersion;

[0048] In the second step, quartz, potassium feldspar, calcite, talc, metal composite powder and titanium dioxide are weighed according to parts by weight and added to the dispersion liquid of the first step to obtain a raw material mixed liquid;

[0049] The third step is to fully mix the raw material mixture in the second step until it is uniform to obtain the inner glaze slurry;

[0050] The fourth step is to glaze the inner surface of the ceramic wine bottle body with the inner glaze slurry, and then bake it in a high-temperature furnace, that is, first heat it to 750℃ at a rate of 3℃ / min, then heat it to 900℃ at a rate of 1.5℃ / min, keep it warm for 25 minutes, and then cool it to room temperature with the furnace to form the inner glaze of the ceramic wine bottle. Example 2

[0051] A ceramic wine bottle inner glaze, the ingredients calculated by weight comprising:

[0052] 30 parts of quartz stone, 25 parts of potassium feldspar, 16 parts of calcite, 12 parts of talc, 8 parts of metal composite powder, 5 parts of magnesium oxide, 1.2 parts of sodium hydroxyethyl cellulose and 30 parts of deionized water.

[0053] The purity of quartz stone is higher than 99.9%, and the particle size is 10-20μm; the purity of potassium feldspar is higher than 99%, and the particle size is 10-20μm; the purity of calcite is higher than 99.5%, and the particle size is 10-20μm; the purity of talc is higher than 99%, and the particle size is 10-20μm.

[0054] The preparation method of the metal composite powder includes:

[0055] S1. Iridium trichloride (IrCl3) and scandium trichloride (ScCl3) were mixed in deionized water in a mass volume ratio of 0.3 g:0.15 g:10 mL of iridium trichloride, scandium trichloride, and deionized water. The mixture was stirred thoroughly until uniform. Ammonia water with a mass fraction of 20% was then added dropwise in an amount of 10% of the volume of deionized water. The mixture was stirred in an ice-water bath for 5 h, then warmed to room temperature and stirred for 1 h. The precipitate was filtered out and washed with water until the washing liquid was neutral. The mixture was dried in vacuo to obtain a composite complex.

[0056] S2. Mixing the composite complex and tricalcium phosphate (Ca3(PO4)2) into a ball mill at a mass ratio of 1:2.3, and ball milling under inert protection at a ball milling speed of 350 r / min, a ball milling time of 3 h, and a ball-to-material ratio of 6:1 to obtain a composite product;

[0057] S3. The composite product is sintered in a muffle furnace at a temperature of 400° C. for 2 h to obtain a metal composite powder.

[0058] The method for preparing the inner glaze of the ceramic wine bottle comprises the following steps:

[0059] The first step is to weigh sodium hydroxyethyl cellulose and deionized water according to parts by weight, and mix them thoroughly to obtain a dispersion;

[0060] In the second step, quartz, potassium feldspar, calcite, talc, metal composite powder and magnesium oxide are weighed according to parts by weight and added to the dispersion liquid of the first step to obtain a raw material mixed liquid;

[0061] The third step is to fully mix the raw material mixture in the second step until it is uniform to obtain the inner glaze slurry;

[0062] The fourth step is to glaze the inner surface of the ceramic wine bottle body with the inner glaze slurry, and then bake it in a high-temperature furnace, that is, first heat it to 700℃ at a rate of 2℃ / min, then heat it to 850℃ at a rate of 1℃ / min, keep it warm for 20 minutes, and then cool it to room temperature with the furnace to form the inner glaze of the ceramic wine bottle. Example 3

[0063] A ceramic wine bottle inner glaze, the ingredients calculated by weight comprising:

[0064] 50 parts of quartz stone, 50 parts of potassium feldspar, 32 parts of calcite, 24 parts of talc, 16 parts of metal composite powder, 10 parts of iron oxide, 3.6 parts of polyacrylamide and 40 parts of deionized water.

[0065] The purity of quartz stone is higher than 99.9%, and the particle size is 10-20μm; the purity of potassium feldspar is higher than 99%, and the particle size is 10-20μm; the purity of calcite is higher than 99.5%, and the particle size is 10-20μm; the purity of talc is higher than 99%, and the particle size is 10-20μm.

[0066] The preparation method of the metal composite powder includes:

[0067] S1. Iridium trichloride (IrCl3) and scandium trichloride (ScCl3) were mixed in deionized water in a mass volume ratio of 0.6 g:0.3 g:20 mL of iridium trichloride, scandium trichloride, and deionized water. The mixture was stirred thoroughly until uniform, and then 30% ammonia water was added dropwise in an amount of 20% of the volume of deionized water. The mixture was stirred in an ice-water bath for 10 h, then warmed to room temperature and stirred for 2 h. The precipitate was filtered out, washed with water until the washing liquid was neutral, and vacuum dried to obtain a composite complex.

[0068] S2. Mixing the composite complex and tricalcium phosphate (Ca3(PO4)2) into a ball mill at a mass ratio of 1:4.6, and ball milling under inert protection at a ball milling speed of 450 r / min, a ball milling time of 6 h, and a ball-to-material ratio of 10:1 to obtain a composite product;

[0069] S3. The composite product is sintered in a muffle furnace at a sintering temperature of 500° C. for 4 hours to obtain a metal composite powder.

[0070] The method for preparing the inner glaze of the ceramic wine bottle comprises the following steps:

[0071] The first step is to weigh the thickener and deionized water according to parts by weight, mix them thoroughly and evenly to obtain a dispersion;

[0072] In the second step, quartz, potassium feldspar, calcite, talc, metal composite powder and colorant are weighed according to weight and added to the dispersion liquid of the first step to obtain a raw material mixed liquid;

[0073] The third step is to fully mix the raw material mixture in the second step until it is uniform to obtain the inner glaze slurry;

[0074] The fourth step is to glaze the inner surface of the ceramic wine bottle body with the inner glaze slurry, and then bake it in a high-temperature furnace, that is, first heat it to 800℃ at a rate of 4℃ / min, then heat it to 950℃ at a rate of 2℃ / min, keep it warm for 30 minutes, and then cool it to room temperature with the furnace to form the inner glaze of the ceramic wine bottle.

[0075] Comparative Example 1

[0076] A ceramic wine bottle lining glaze differs from Example 1 only in that the metal composite powder is replaced with tricalcium phosphate (Ca3(PO4)2) powder. The remaining ingredients and preparation process remain unchanged.

[0077] Calculated in parts by weight, including:

[0078] 40 parts of quartz stone, 38 parts of potassium feldspar, 24 parts of calcite, 18 parts of talc, 12 parts of tricalcium phosphate (Ca3(PO4)2) powder, 8 parts of titanium dioxide, 2.4 parts of sodium carboxymethyl cellulose and 35 parts of deionized water.

[0079] Comparative Example 2

[0080] A ceramic wine bottle inner glaze differs from Example 1 only in that the metal composite powder is replaced with an iridium / tricalcium phosphate composite powder. The remaining ingredients and preparation process remain unchanged.

[0081] Calculated in parts by weight, including:

[0082] 40 parts of quartz stone, 38 parts of potassium feldspar, 24 parts of calcite, 18 parts of talc, 12 parts of iridium / tricalcium phosphate composite powder, 8 parts of titanium dioxide, 2.4 parts of sodium carboxymethyl cellulose and 35 parts of deionized water.

[0083] The preparation method of iridium / tricalcium phosphate composite powder comprises:

[0084] S1, iridium trichloride is mixed in deionized water, the mass volume ratio of iridium trichloride and deionized water is 0.67g:15mL, fully stirred to evenly, then dripping mass fraction is 25% ammoniacal liquor, and addition is 15% of deionized water volume, stirs 8h under ice-water bath, is then warming to room temperature, continues stirring 1.5h, filters out precipitation, washs with water to washings and presents neutrality, after vacuum drying, obtains complex;

[0085] S2. The complex and tricalcium phosphate were mixed into a ball mill in a mass ratio of 1:3.5, and ball milled under inert protection at a ball milling speed of 400 r / min, a ball milling time of 5 h, and a ball-to-material ratio of 8:1 to obtain a composite product;

[0086] S3. The composite product is sintered in a muffle furnace at a temperature of 450° C. for 3 h to obtain an iridium / tricalcium phosphate composite powder.

[0087] Comparative Example 3

[0088] A ceramic wine bottle inner glaze differs from Example 1 only in that the metal composite powder is replaced with an iridium / tricalcium phosphate composite powder. The remaining ingredients and preparation process remain unchanged.

[0089] Calculated in parts by weight, including:

[0090] 40 parts of quartz stone, 38 parts of potassium feldspar, 24 parts of calcite, 18 parts of talc, 12 parts of iridium / tricalcium phosphate composite powder, 8 parts of titanium dioxide, 2.4 parts of sodium carboxymethyl cellulose and 35 parts of deionized water.

[0091] The preparation method of iridium / tricalcium phosphate composite powder comprises:

[0092] S1. Scandium trichloride was mixed into deionized water with a mass volume ratio of scandium trichloride to deionized water of 0.67 g:15 mL. The mixture was stirred until uniform, and then 25% ammonia water was added dropwise in an amount of 15% by volume of deionized water. The mixture was stirred for 8 h in an ice-water bath, then warmed to room temperature, and stirred for 1.5 h. The precipitate was filtered out, washed with water until the washing liquid was neutral, and dried in vacuo to obtain a complex.

[0093] S2. The complex and tricalcium phosphate were mixed into a ball mill in a mass ratio of 1:3.5, and ball milled under inert protection at a ball milling speed of 400 r / min, a ball milling time of 5 h, and a ball-to-material ratio of 8:1 to obtain a composite product;

[0094] S3. The composite product is sintered in a muffle furnace at a temperature of 450° C. for 3 h to obtain scandium / tricalcium phosphate composite powder.

[0095] Experimental example

[0096] The ceramic wine bottle glazes prepared in Example 1 and Comparative Examples 1-3 were tested and compared for performance: surface condition, adhesion, wear resistance, and flexural strength. Surface condition was assessed by visual observation and touch. Adhesion was tested according to the standard GB / T 1720-2020; wear resistance was tested according to the standard GB / T 3810.7-2016; and flexural strength was tested according to the standard GB / T 3001-2017.

[0097] The test results are shown in Table 1:

[0098]

[0099] As can be seen from Table 1, the inner glaze of the ceramic wine bottle prepared in Example 1 has a smooth and even surface, an adhesion level of 1, a wear resistance level of 5, and a flexural strength of 158 MPa, which are superior to the performance of Comparative Examples 1-3. This shows that the inner glaze prepared in Example 1 of the present invention is not only uniform and smooth on the ceramic wine bottle, but also has strong adhesion and high strength, is not prone to cracking, and can effectively prevent wine leakage, maintaining the freshness and taste of the wine.

[0100] In the description of this specification, reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0101] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A ceramic wine bottle inner glaze, characterized in that: Calculated in parts by weight, including: 30-50 parts of quartz stone, 25-50 parts of potassium feldspar, 16-32 parts of calcite, 12-24 parts of talc, 8-16 parts of metal composite powder, 5-10 parts of colorant, 1.2-3.6 parts of tackifier and 30-40 parts of deionized water; The preparation method of the metal composite powder comprises: S1. Mix iridium trichloride (IrCl3) and scandium trichloride (ScCl3) in deionized water, stir thoroughly until uniform, then add ammonia water dropwise, stir in an ice-water bath for 5-10 hours, then warm to room temperature, continue stirring for 1-2 hours, filter out the precipitate, wash with water until the washing liquid is neutral, and vacuum dry to obtain a composite complex; S2, mixing the composite complex and tricalcium phosphate (Ca3(PO4)2) into a ball mill, and performing ball milling treatment under the protection of an inert gas to obtain a composite product; S3. Sintering the composite product in a muffle furnace to obtain metal composite powder.

2. The inner glaze of a ceramic wine bottle according to claim 1, characterized in that: The purity of the quartz stone is higher than 99.9%, and the particle size is 10-20 μm; the purity of the potassium feldspar is higher than 99%, and the particle size is 10-20 μm; the purity of the calcite is higher than 99.5%, and the particle size is 10-20 μm; the purity of the talc is higher than 99%, and the particle size is 10-20 μm.

3. The inner glaze of a ceramic wine bottle according to claim 1, characterized in that: The colorant is one or a combination of titanium dioxide, magnesium oxide, iron oxide, and calcium borate.

4. The inner glaze of a ceramic wine bottle according to claim 1, characterized in that: The viscosity enhancer is one or a combination of sodium carboxymethyl cellulose, sodium hydroxyethyl cellulose, polyacrylamide, and polyvinyl alcohol.

5. The inner glaze of a ceramic wine bottle according to claim 1, characterized in that: In S1, the mass volume ratio of iridium trichloride, scandium trichloride and deionized water is (0.3-0.6) g: (0.15-0.3) g: (10-20) mL; the mass fraction of ammonia water is 20%-30%, and the added amount is 10%-20% of the volume of deionized water.

6. The inner glaze of a ceramic wine bottle according to claim 1, characterized in that: In the S2, the mass ratio of the composite complex to tricalcium phosphate is 1:2.3-4.6; the ball milling speed is 350-450 r / min, the ball milling time is 3-6 h, and the ball-to-material ratio is 6-10:

1.

7. The inner glaze of a ceramic wine bottle according to claim 1, characterized in that: In the step S3, the sintering temperature is 400-500° C., and the sintering time is 2-4 hours.

8. A method for preparing the inner glaze of a ceramic wine bottle according to claim 1, characterized in that: The following steps are involved: The first step is to weigh the thickener and deionized water according to parts by weight, mix them thoroughly and evenly to obtain a dispersion; In the second step, quartz, potassium feldspar, calcite, talc, metal composite powder and colorant are weighed according to weight and added to the dispersion liquid of the first step to obtain a raw material mixed liquid; The third step is to fully mix the raw material mixture in the second step until it is uniform to obtain the inner glaze slurry; The fourth step is to glaze the inner surface of the ceramic wine bottle body with the inner glaze slurry, and then bake it in a high-temperature furnace to form the inner glaze of the ceramic wine bottle.

9. The method for preparing the inner glaze of a ceramic wine bottle according to claim 8, characterized in that: The calcination process is as follows: firstly heating to 700-800°C at a rate of 2-4°C / min, then heating to 850-950°C at a rate of 1-2°C / min, keeping the temperature for 20-30 minutes, and then cooling to room temperature with the furnace.

Images