Novel purple gold glaze formula and preparation method thereof

Abstract

The invention relates to the technical field of porcelain glaze, in particular to a novel purple gold glaze formula which is prepared from the following raw materials in percentage by weight: 20-50% of potassium feldspar, 5-15% of quartz, 1-5% of biotite, 10-20% of chlorite, 5-15% of calcite, 15-30% of talc, 0.1-7% of sodium oxide, 0.2-3% of titanium oxide, 0.1-5% of copper oxide, 1-3% of magnesium oxide, 5-8% of strontium carbonate and 2-4% of calcium silicate. And 5-8% of light calcium carbonate. The invention also relates to a preparation method of the purple gold glaze. According to the invention, exchange with ions of tea soup can be realized during tea making, so that the tea soup contains Mg2, Sr2 and Ca < 2 + > ions, Mg < 2 + > can promote nerve and muscle functions, Sr < 2 + > has an anti-oxidation characteristic, Ca < 2 + > can adjust the taste of the tea soup, light calcium carbonate (CaCO3) is decomposed under a high-temperature condition to generate CO2, a microporous structure is formed, the contact area of a glaze surface and the tea soup is increased, and the glaze surface has an anti-oxidation function. Therefore, directional release of minerals can be realized, and alcoholization stability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of porcelain glaze, and particularly to a new type of purple-gold glaze formula and its production method. Background Art

[0002] In the development process of the ceramic industry, the shape, glaze, decoration, and painting of ceramics have always been an integral part of the entire work. The preparation of the glaze makes the porcelain more dazzling. Porcelain embryos of the same shape often have different visual effects on viewers due to different glaze surfaces. Purple-gold glaze is a high-temperature color glaze with bright colors and strong ornamental value, and is deeply loved by users.

[0003] Chinese Patent Publication No.: CN106517781B discloses a purple-gold glaze, which is made of the following raw materials by weight percentage: potassium feldspar 20 - 50%, quartz 5 - 15%, biotite 1 - 5%, chlorite 10 - 20%, calcite 5 - 15%, talc 15 - 30%, sodium oxide 0.1 - 7%, titanium oxide 0.2 - 3%, copper oxide 0.1 - 5%. The present invention also relates to a production method of the purple-gold glaze. The glaze surface of the purple-gold glaze provided by the present invention is purple-golden and has a matte or bright gloss effect. The glaze surface contains crystal points, and its glaze color is simple and elegant, noble and moist. It has a golden luster when held in the hand, making people reluctant to part with it.

[0004] However, there are areas for improvement in the above purple-gold glaze formula. After the tea sets fired with the above formula are actually used, their ion exchange ability with tea soup is weak, and they cannot achieve directional release of minerals. At the same time, the effect of mellowing the taste of tea soup is not good. Therefore, we propose a new type of purple-gold glaze formula and its production method to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a new type of purple-gold glaze formula and its production method to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A new type of purple-gold glaze formula, which is made of the following raw materials by weight percentage: potassium feldspar 20 - 50%, quartz 5 - 15%, biotite 1 - 5%, chlorite 10 - 20%, calcite 5 - 15%, talc 15 - 30%, sodium oxide 0.1 - 7%, titanium oxide 0.2 - 3%, copper oxide 0.1 - 5%, magnesium oxide 1 - 3%, strontium carbonate 5 - 8%, calcium silicate 2 - 4%, light calcium carbonate 5 - 8%.

[0007] Further preferably, a production method of a new type of purple-gold glaze formula includes the following steps:

[0008] (1) Crush potassium feldspar, quartz, biotite, chlorite, calcite, and talc respectively and then sieve them.

[0009] (2) Weigh and mix sodium oxide, titanium oxide, copper oxide, magnesium oxide, strontium carbonate, calcium silicate, light calcium carbonate, and sieved potassium feldspar, biotite, quartz, chlorite, calcite, and talc according to the ratio.

[0010] (3) Put the mixed raw materials into a ball mill and perform wet ball milling for 10 - 15 hours according to the ratio of material : water : ball = 1 : 0.5 : 1.5.

[0011] (4) After ball milling, the glaze is screened through a 100 - 200 mesh sieve and then adjusted into a glaze slurry with a Baume degree of 50 - 80.

[0012] (5) Take the formed blank, spray the glaze slurry on it, dry it, and then fire it into a finished product in a kiln. The firing process in the kiln specifically includes the following stages: The first stage is low - temperature pre - firing. The temperature in the kiln rises from room temperature to 800°C - 900°C, the heating time is 5 - 7 hours, and after heating, it is kept warm for 0.5 - 1 hour. The second stage is the reduction stage. The temperature in the kiln rises from 800°C - 900°C to 1000°C - 1100°C, and it is kept warm for 30 minutes. Among them, the heating time is 2 - 3 hours. The third stage is high - temperature final firing. The temperature in the kiln rises from 1000°C - 1100°C to 1150°C - 1180°C, the heating time is 0.5 - 1 hour, and it is kept warm for 10 minutes.

[0013] (6) After cooling the fired finished product, perform post - treatment on the glaze surface. The post - treatment of the glaze surface includes the following stages: The first stage is acid activation treatment. After the firing temperature drops, soak the glaze surface with dilute acetic acid (concentration 1 - 3%) for 10 - 15 minutes to form nano - scale etching channels on the surface and accelerate the ion exchange rate. The second stage is the ion loading process. Immerse the glazed ware in a solution containing Mg 2+ , Sr 2+ to pre - load ions through adsorption and extend the release period.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the tabular data, the present invention shows that the pH value of experimental group A is higher than that of control group C, indicating that optimizing the glaze surface can effectively neutralize the acidity of the tea soup. The concentrations of Mg 2+ , Sr 2+ , Ca 2+ in experimental group A should be significantly higher than those in control group C, indicating that Mg 2+ , Sr 2+ , Ca 2+ minerals can be dissolved in the tea soup. If the data of the 5th soaking in experimental group B retains more than 50% of the dissolution amount, it indicates that the ion exchange ability of the glaze surface is stable, so that it can exchange ions with the tea soup during tea brewing, making the tea soup contain Mg 2 , Sr 2 , Ca 2+ ions, Mg 2+Capable of promoting nerve and muscle function, Sr 2+ Having antioxidant properties, Ca 2+ Capable of regulating the taste of tea soup. Light calcium carbonate (CaCO3) decomposes under high temperature conditions to generate CO2, forming a microporous structure, increasing the contact area between the glaze surface and the tea soup, and thus enabling the directional release of minerals and enhancing the stability of aging. Detailed implementation manners

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] Embodiment

[0017] The present invention provides a technical solution: a new type of purple gold glaze formula, which is made of the following raw materials in weight percentages: potassium feldspar 20 - 50%, quartz 5 - 15%, biotite 1 - 5%, chlorite 10 - 20%, calcite 5 - 15%, talc 15 - 30%, sodium oxide 0.1 - 7%, titanium oxide 0.2 - 3%, copper oxide 0.1 - 5%, magnesium oxide 1 - 3%, strontium carbonate 5 - 8%, calcium silicate 2 - 4%, light calcium carbonate 5 - 8%;

[0018] Magnesium oxide (MgO): accounting for 1 - 3%, providing Mg 2+ , promoting nerve and muscle function.

[0019] Strontium carbonate (SrCO3): accounting for 5 - 8% (decomposing into SrO at high temperature), releasing Sr 2+ , having antioxidant properties.

[0020] Calcium silicate (CaSiO3): accounting for 2 - 4%, providing slow-release Ca 2+ , regulating the taste of tea soup.

[0021] Light calcium carbonate (CaCO3): accounting for 5 - 8%, decomposing to generate CO2 under high temperature conditions, forming a microporous structure, increasing the contact area between the glaze surface and the tea soup;

[0022] Ion exchange reaction between the glaze surface and the tea soup. H + (in an acidic environment) displaces with metal oxides in the glaze, releasing mineral ions:

[0023] MgO + 2H⁺ → Mg²⁺ + H₂O MgO + 2H⁺ → Mg²⁺ + H₂O SrO + 2H⁺ → Sr²⁺ + H₂O SrO + 2H⁺ → Sr²⁺ + H₂O CaSiO₃ + 2H⁺ → Ca²⁺ + H₂SiO₃ CaSiO₃ + 2H⁺ → Ca²⁺ + H₂SiO₃

[0024] Function: Neutralize the acidity of the tea soup (pH value increases by 0.3 - 0.5), and release Mg 2+ , Sr 2+ , Ca 2+ and other minerals.

[0025] The porous structure enhances ion diffusion. The silicate network on the inner wall of the micropores adsorbs H + through the surface hydroxyl groups (-OH), + and releases the loaded metal ions (M 2+ represents Mg 2+ ), Sr

[0026] A method for making a new type of purple-gold glaze, comprising the following steps:

[0027] (1) Crush potassium feldspar, quartz, biotite, chlorite, calcite and talc respectively and then screen them;

[0028] (2) Weigh and mix sodium oxide, titanium oxide, copper oxide, magnesium oxide, strontium carbonate, calcium silicate, light calcium carbonate and the screened potassium feldspar, biotite, quartz, chlorite, calcite and talc according to the ratio;

[0029] (3) Put the mixed raw materials into a ball mill, and carry out wet ball milling for 10 - 15 hours according to the ratio of material: water: ball = 1:0.5:1.5;

[0030] (4) After screening the ball-milled glaze through a 100 - 200 mesh sieve, adjust it into a glaze slurry with a Baume degree of 50 - 80;

[0031] (5) Spray the glaze slurry on the formed blank, dry it, and then fire it into a finished product in a kiln. The kiln firing process specifically includes the following stages: The first stage is low-temperature pre-firing, the temperature in the kiln rises from room temperature to 800°C - 900°C, the heating time is 5 - 7 hours, and keep it warm for 0.5 - 1 hour after heating; The second stage is the reduction stage, the temperature in the kiln rises from 800°C - 900°C to 1000°C - 1100°C, keep it warm for 30 minutes, among which the heating time is 2 - 3 hours; The third stage is high-temperature final firing, the temperature in the kiln rises from 1000°C - 1100°C to 1150°C - 1180°C, the heating time is 0.5 - 1 hour, and keep it warm for 10 minutes;

[0032] (6) After cooling the fired finished product, perform post-treatment on the glaze surface. The post-treatment of the glaze surface includes the following stages: The first stage is acid activation treatment. After the firing temperature drops, soak the glaze surface in dilute acetic acid (concentration 1-3%) for 10-15 minutes to form nano-scale etching channels on the surface, accelerating the ion exchange rate. The second stage is the ion loading process. Immerse the glazed ware in a solution containing Mg 2+ , Sr 2+ to pre-load ions through adsorption and extend the release period.

[0033] Experimental Example

[0034] Experimental Purpose

[0035] 1. Measure the change in the pH value of the tea soup when brewing tea with the optimized Zijin glaze tea set compared to the original formula.

[0036] 2. Quantitatively analyze the dissolution amounts of Mg 2+ , Sr 2+ , Ca 2+ minerals in the tea soup.

[0037] 3. Verify the stability of the optimized formula (the attenuation of ion exchange ability after multiple uses).

[0038] Experimental Materials and Equipment

[0039]

[0040] Experimental Procedures

[0041] 1. Sample Preparation

[0042] Standardized tea brewing process: [[ID=4,2]]

[0043] Pretreatment: Boil all glazed cups 3 times with ultrapure water to remove surface impurities.

[0044] Tea leaf addition and water injection: Take 5.0 g of tea leaves and place them in the glazed cup, then add 200 mL of boiling ultrapure water (98 ± 2 °C).

[0045] Constant-temperature soaking: Control the temperature of the constant-temperature water bath at 90 °C and soak for 10 minutes.

[0046] Tea soup collection: Filter the tea soup, discard the first 10 mL (to rinse the filter paper), and collect the subsequent tea soup samples.

[0047] Experimental group design:

[0048] Experimental group A: The first soaking of the optimized glazed cup in the tea soup (to test the maximum dissolution amount).

[0049] Experimental group B: The optimized glazed cup is soaked continuously 5 times (10 minutes each time, to test the attenuation performance).

[0050] Control group C: The original formula glaze cup is immersed in tea soup for the first time.

[0051] 2. pH value detection

[0052] Calibrate the pH meter: Calibrate it using pH 4.01, 6.86, and 9.18 standard buffer solutions.

[0053] Measurement: Cool the tea soup to 25 °C and directly measure the pH value. Repeat 3 times for each group and take the average value.

[0054] 3. Detection of mineral dissolution amount

[0055] Sample pretreatment: Take 50 mL of tea soup, add 2 mL of concentrated nitric acid for acidification (pH < 2), let it stand for 24 hours to digest organic matter; filter through a 0.45 μm filter membrane and make up to 50 mL with ultrapure water.

[0056] ICP-OES analysis:

[0057] After calibrating the instrument, measure the emission intensities of Mg (wavelength 285.213 nm), Sr (407.771 nm), and Ca (315.887 nm); calculate the concentration by the standard curve method (unit: mg / L).

[0058] 4. Data record form

[0059]

[0060] It can be obtained from the data in the above table that:

[0061] The pH value of experimental group A is higher than that of control group C, indicating that optimizing the glaze surface can effectively neutralize the acidity of the tea soup;

[0062] Mg in experimental group A 2+ , Sr 2+ , Ca 2+ The concentrations should be significantly higher than those in control group C, indicating that Mg 2+ , Sr 2 + , Ca 2+ minerals can be dissolved in the tea soup;

[0063] If the data of the 5th immersion in experimental group B retains more than 50% of the dissolution amount, it indicates that the ion exchange ability of the glaze surface is stable.

[0064] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new formula for purple gold glaze, characterized in that, It is made from the following raw materials by weight percentage: potassium feldspar 20 - 50%, quartz 5 - 15%, biotite 1 - 5%, chlorite 10 - 20%, calcite 5 - 15%, talc 15 - 30%, sodium oxide 0.1 - 7%, titanium oxide 0.2 - 3%, copper oxide 0.1 - 5%, magnesium oxide 1 - 3%, strontium carbonate 5 - 8%, calcium silicate 2 - 4%, light calcium carbonate 5 - 8%.

2. A method for making a new type of purple - gold glaze according to claim 1, comprising the following steps: (1) Crush potassium feldspar, quartz, biotite, chlorite, calcite and talc respectively and then sieve them; (2) Weigh and mix sodium oxide, titanium oxide, copper oxide, magnesium oxide, strontium carbonate, calcium silicate, light calcium carbonate and the sieved potassium feldspar, biotite, quartz, chlorite, calcite and talc according to the ratio; (3) Put the mixed raw materials into a ball mill and carry out wet ball - milling for 10 - 15 hours according to the ratio of material: water: ball = 1:0.5:1.5; (4) After the ball - milled glaze is sieved through a 100 - 200 - mesh sieve, it is then adjusted into a glaze slurry with a Baume degree of 50 - 80; (5) Spray the formed blank with this glaze slurry, dry it, and then fire it into a finished product in a kiln; (6) After cooling the fired finished product, carry out post - treatment on the glaze surface.

3. The manufacturing method of a novel purple-gold glaze according to claim 2, characterized in that, The process of firing in the kiln in step (5) specifically includes the following stages: The first stage is low - temperature pre - firing. The temperature in the kiln rises from room temperature to 800℃ - 900℃, the heating time is 5 - 7 hours, and after heating, it is kept warm for 0.5 - 1 hour. The second stage is the reduction stage. The temperature in the kiln rises from 800℃ - 900℃ to 1000℃ - 1100℃, and it is kept warm for 30 minutes. Among them, the heating time is 2 - 3 hours. The third stage is high - temperature final firing. The temperature in the kiln rises from 1000℃ - 1100℃ to 1150℃ - 1180℃, the heating time is 0.5 - 1 hour, and it is kept warm for 10 minutes.

4. The manufacturing method of a novel purple-gold glaze according to claim 2, characterized in that, In the post-treatment of the glaze surface in step (6), it includes the following stages: the first stage is acid activation treatment. After the firing temperature drops, the glaze surface is soaked in dilute acetic acid (concentration 1-3%) for 10-15 minutes to form nano-scale etching channels on the surface, accelerating the ion exchange rate; the second stage is the ion loading process. The glazed ware is soaked in a solution containing Mg2+ and Sr 2 + to pre-load ions through adsorption, extending the release period.

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