1. The white-bottom black-flower enamel is characterized in that: comprises a blank body, makeup clay, black fancy glaze and protective glaze;

the cosmetic soil is prepared from the following raw materials in parts by weight: 25-35 parts of dolomite, 10-18 parts of borax, 15-22 parts of clam powder, 12-15 parts of talc, 8-12 parts of anorthite, 5-10 parts of bentonite and 5-8 parts of wollastonite;

the black fancy glaze is prepared from the following raw materials in parts by weight: 5-10 parts of potash feldspar, 15-22 parts of gilt soil, 12-15 parts of spodumene, 25-30 parts of ferromanganese ore, 5-8 parts of titanium oxide, 10-15 parts of germanized quartz and 1-3 parts of cobalt oxide.

2. The white-based black fancy glaze according to claim 1, wherein: the protective glaze is prepared from the following raw materials in parts by weight: 22-28 parts of anorthite, 25-35 parts of limestone, 8-15 parts of kaolin, 8-12 parts of ball clay, 12-18 parts of sillimanite and 5-7 parts of transparent frit.

3. The white-based black fancy glaze according to claim 2, wherein: the transparent frit comprises the following chemical components in percentage by mass: SiO 2₂：62.37％、Al₂O₃：15.63％、MgO：7.82％、ZnO：6.54％、TiO₂：1.75％、ZrO₂：2.16％、B₂O₃：2.87％、LiO₂：0.86％。

4. The white-based black fancy glaze according to claim 1, wherein: the blank body is composed of the following raw materials in parts by weight: 13-18 parts of plagioclase, 25-30 parts of quartz sand, 15-20 parts of kaolin, 18-22 parts of muscovite, 10-15 parts of calcite, 5-8 parts of permeant feldspar, 5-7 parts of diatomite, 2-5 parts of zirconia and 1-3 parts of magnesium oxide.

5. A preparation method of white black fancy glaze is characterized by comprising the following steps: the method comprises the following steps:

weighing and proportioning raw materials of a blank body, makeup clay, black flower glaze and protective glaze according to a formula, respectively crushing the raw materials, mixing, and performing wet ball milling to prepare blank slurry, black flower glaze slurry and protective glaze slurry;

step two, the blank slurry, the slurry and the protective glaze slurry prepared in the step one are subjected to magnetic separation for multiple times to remove iron until the iron content in the blank slurry, the slurry and the protective glaze slurry is lower than 0.05 percent;

step three, preparing a ceramic blank body by using the blank slurry treated in the step two, and sending the ceramic blank body into a kiln for biscuit firing for 5-6 hours at the temperature of 720-750 ℃ to obtain a biscuit;

step four, applying the slurry treated in the step two on the surface of the biscuit, after the slurry is dried, utilizing the black flower glaze slurry to screen print black flower patterns on the surface of the biscuit, and after the black flower glaze slurry is dried, repeatedly printing for three times;

step five, the biscuit printed with the black flower pattern is sent into a kiln and is fired for 7-8 hours at the temperature of 1280-1320 ℃, so as to obtain a semi-finished product;

and step six, the protective glaze slurry after the surface treatment of the step two is applied to the semi-finished product prepared in the step five, and the protective glaze slurry is sent into a kiln and fired in a reducing atmosphere, wherein the firing temperature is 1120-.

6. The method for preparing the white-background black fancy glaze according to claim 5, wherein the method comprises the following steps: in the fifth step, the firing is specifically controlled as follows:

and (3) low-temperature stage: raising the temperature in the kiln from normal temperature to 620-650 ℃, and burning for 1-2 h;

and (3) decomposition and oxidation stage: heating the kiln to 860 ℃ and 920 ℃, and burning the kiln for 4-6 hours;

and (3) high-temperature reduction stage: raising the temperature in the kiln to 1240-1260 ℃, and burning the kiln for 3-5 hours;

and (3) high-fire heat preservation stage: controlling the temperature in the kiln at 1280-1320 ℃, and burning the kiln for 7-8 hours;

and (3) natural cooling stage: cooling in the kiln to room temperature, wherein the cooling time is prolonged to more than 8 hours.

7. The method for preparing the white-background black fancy glaze according to claim 6, wherein the method comprises the following steps: in the high-temperature reduction stage, the content of carbon monoxide is 5.4-5.7%, and the content of oxygen is 1.2-1.5%; in the high-fire heat preservation stage, the content of carbon monoxide is 6.8-7.5%, and the content of oxygen is 0.4-0.7%.

8. The method for preparing the white-background black fancy glaze according to claim 5, wherein the method comprises the following steps: the thickness of the cosmetic soil is 0.3-0.5 mm.

9. The method for preparing the white-background black fancy glaze according to claim 5, wherein the method comprises the following steps: the thickness of the protective glaze slip is 0.4-0.6 mm.

10. The method for preparing the white-background black fancy glaze according to claim 5, wherein the method comprises the following steps: when the black flower glaze slurry is subjected to wet ball milling in the first step, the raw materials are subjected to wet grinding in a ball mill for 32-36 hours, the grinding medium is water, and the raw materials: ball: water-1: 1.8-2: 1.2-1.5.

Background

The German white porcelain is originated in Song Yuan, has been reputed in Ming Dynasty and is spread to Qing dynasty, has unique style in the white porcelain system in China, plays an important role in the development history of ceramics and has the reputation of 'east art' internationally. The white Dehua porcelain is made up by using porcelain blank with low iron content and making transparent glaze firing. The Ming dynasty German white porcelain body bone is pure white, solid and compact, the technical process of the body glaze pursues the perfection of jade texture to the utmost extent, and the Ming dynasty German white porcelain body is unique on the porcelain jar full of Linglang. According to the different colors of the porcelain, the porcelain is also respectively snow white, ivory white, fistular onion root white and the like.

When the glaze porcelain is manufactured, although the prior art has made great progress, the glaze porcelain still has some defects, and the glaze porcelain goes through dozens of production procedures from material selection to firing in the manufacturing process; the key point of the glaze porcelain is the glaze, and the transmutation and the color change of the glaze porcelain after firing determine the value of the glaze porcelain, and the main components of the glaze porcelain are feldspar and kaolin, so that the glaze porcelain is easy to crack after being taken out of a kiln and cooled, and the rate of the high-quality products is reduced; although the traditional white glaze is deeply loved by people, the single-color glaze effect can not meet the requirements of people, and needs to be further improved.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a white-bottom black-flower enamel, and also aims to provide a preparation method of the enamel.

The invention adopts the following technical scheme:

a white-bottom black-flower enamel comprises a blank body, makeup clay, black-flower glaze and protective glaze;

the cosmetic soil is prepared from the following raw materials in parts by weight: 25-35 parts of dolomite, 10-18 parts of borax, 15-22 parts of clam powder, 12-15 parts of talc, 8-12 parts of anorthite, 5-10 parts of bentonite and 5-8 parts of wollastonite;

the black fancy glaze is prepared from the following raw materials in parts by weight: 5-10 parts of potash feldspar, 15-22 parts of gilt soil, 12-15 parts of spodumene, 25-30 parts of ferromanganese ore, 5-8 parts of titanium oxide, 10-15 parts of germanized quartz and 1-3 parts of cobalt oxide.

Further, the protective glaze is prepared from the following raw materials in parts by weight: 22-28 parts of anorthite, 25-35 parts of limestone, 8-15 parts of kaolin, 8-12 parts of ball clay, 12-18 parts of sillimanite and 5-7 parts of transparent frit.

Further, the chemical composition of the transparent frit is as follows by mass: SiO 2₂：62.37％、Al₂O₃：15.63％、MgO：7.82％、ZnO：6.54％、TiO₂：1.75％、ZrO₂：2.16％、B₂O₃：2.87％、LiO₂：0.86％。

Further, the blank body is composed of the following raw materials in parts by weight: 13-18 parts of plagioclase, 25-30 parts of quartz sand, 15-20 parts of kaolin, 18-22 parts of muscovite, 10-15 parts of calcite, 5-8 parts of permeant feldspar, 5-7 parts of diatomite, 2-5 parts of zirconia and 1-3 parts of magnesium oxide.

A preparation method of white black fancy glaze comprises the following steps:

weighing and proportioning raw materials of a blank body, makeup clay, black flower glaze and protective glaze according to a formula, respectively crushing the raw materials, mixing, and performing wet ball milling to prepare blank slurry, black flower glaze slurry and protective glaze slurry;

step two, the blank slurry, the slurry and the protective glaze slurry prepared in the step one are subjected to magnetic separation for multiple times to remove iron until the iron content in the blank slurry, the slurry and the protective glaze slurry is lower than 0.05 percent;

step three, preparing a ceramic blank body by using the blank slurry treated in the step two, and sending the ceramic blank body into a kiln for biscuit firing for 5-6 hours at the temperature of 720-750 ℃ to obtain a biscuit;

step four, applying the slurry treated in the step two on the surface of the biscuit, after the slurry is dried, utilizing the black flower glaze slurry to screen print black flower patterns on the surface of the biscuit, and after the black flower glaze slurry is dried, repeatedly printing for three times;

step five, the biscuit printed with the black flower pattern is sent into a kiln and is fired for 7-8 hours at the temperature of 1280-1320 ℃, so as to obtain a semi-finished product;

and step six, the protective glaze slurry after the surface treatment of the step two is applied to the semi-finished product prepared in the step five, and the protective glaze slurry is sent into a kiln and fired in a reducing atmosphere, wherein the firing temperature is 1120-.

Further, in the fifth step, the firing control is as follows:

and (3) low-temperature stage: raising the temperature in the kiln from normal temperature to 620-650 ℃, and burning for 1-2 h;

and (3) decomposition and oxidation stage: heating the kiln to 860 ℃ and 920 ℃, and burning the kiln for 4-6 hours;

and (3) high-temperature reduction stage: raising the temperature in the kiln to 1240-1260 ℃, and burning the kiln for 3-5 hours;

and (3) high-fire heat preservation stage: controlling the temperature in the kiln at 1280-1320 ℃, and burning the kiln for 7-8 hours;

and (3) natural cooling stage: cooling in the kiln to room temperature, wherein the cooling time is prolonged to more than 8 hours.

Furthermore, in the high-temperature reduction stage, the content of carbon monoxide is 5.4-5.7%, and the content of oxygen is 1.2-1.5%; in the high-fire heat preservation stage, the content of carbon monoxide is 6.8-7.5%, and the content of oxygen is 0.4-0.7%.

Further, the thickness of the cosmetic soil is 0.3-0.5 mm.

Furthermore, the thickness of the protective glaze slip is 0.4-0.6 mm.

Further, when the black flower glaze slurry is subjected to wet ball milling in the step one, the raw materials are subjected to wet grinding in a ball mill for 32 to 36 hours, the grinding medium is water, and the raw materials: ball: water-1: 1.8-2: 1.2-1.5.

As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are: the fired enamel uses white as the ground color, and forms black pattern patterns on the surface of the ground color, and the black pattern patterns and the ground color form sharp contrast, thereby greatly improving the expressive force of the black pattern, having unique artistic effect and meeting more market demands;

the clam powder, anorthite, wollastonite and dolomite are introduced into the makeup clay to be matched to ensure the whiteness of the surface of a blank body, so that the whiteness of a fired semi-finished product can reach more than 83 degrees, the required whiteness requirement is met, and white glaze does not need to be additionally coated to ensure the whiteness of the glazed porcelain; borax and talc are introduced for matching, so that the fire-resistant temperature of the makeup clay is improved, and the makeup clay and the black fancy glaze can be fired at one time;

the black fancy glaze ensures that the surface of a blank body after primary glaze firing can form a required pattern by limiting the specific composition of raw materials, wherein, the purple gold soil, the cobalt oxide and the ferromanganese ore are introduced to be matched so as to ensure the final color of the black fancy glaze; the spodumene is introduced to be matched with the titanium oxide, so that an intermediate layer is formed, and the fired black fancy glaze can be stably formed on a blank;

by applying a layer of transparent protective glaze on the surface of the semi-finished product, the strength of the glazed porcelain can be further improved while the pattern is protected; wherein, the combination of the sunset stone and the ball body can improve the thermal stability of the glaze surface of the protective glaze; the specific chemical composition of the transparent frit is limited, so that the protective glaze is well combined with the makeup clay and the black fancy glaze, meanwhile, the occurrence of glaze bubbles is reduced, and the smoothness of the glaze surface is ensured.

Detailed Description

The invention is further described below by means of specific embodiments.

A white-bottom black-flower enamel comprises a blank body, makeup clay, black-flower glaze and protective glaze.

The blank body is composed of the following raw materials in parts by weight: 13-18 parts of plagioclase, 25-30 parts of quartz sand, 15-20 parts of kaolin, 18-22 parts of muscovite, 10-15 parts of calcite, 5-8 parts of permeant feldspar, 5-7 parts of diatomite, 2-5 parts of zirconia and 1-3 parts of magnesium oxide.

The cosmetic soil is prepared from the following raw materials in parts by weight: 25-35 parts of dolomite, 10-18 parts of borax, 15-22 parts of clam powder, 12-15 parts of talc, 8-12 parts of anorthite, 5-10 parts of bentonite and 5-8 parts of wollastonite.

The black fancy glaze comprises the following raw materials in parts by weight: 5-10 parts of potash feldspar, 15-22 parts of gilt soil, 12-15 parts of spodumene, 25-30 parts of ferromanganese ore, 5-8 parts of titanium oxide, 10-15 parts of germanized quartz and 1-3 parts of cobalt oxide.

The protective glaze comprises the following raw materials in parts by weight: 22-28 parts of anorthite, 25-35 parts of limestone, 8-15 parts of kaolin, 8-12 parts of ball clay, 12-18 parts of sillimanite and 5-7 parts of transparent frit; specifically, the transparent frit comprises the following chemical components in percentage by mass: SiO 2₂：62.37％、Al₂O₃：15.63％、MgO：7.82％、ZnO：6.54％、TiO₂：1.75％、ZrO₂：2.16％、B₂O₃：2.87％、LiO₂：0.86％。

A preparation method of white black fancy glaze comprises the following steps:

weighing and proportioning raw materials of a blank body, makeup clay, black flower glaze and protective glaze according to a formula, respectively crushing the raw materials, mixing, and performing wet ball milling to prepare blank slurry, black flower glaze slurry and protective glaze slurry;

step two, the blank slurry, the slurry and the protective glaze slurry prepared in the step one are subjected to magnetic separation for multiple times to remove iron until the iron content in the blank slurry, the slurry and the protective glaze slurry is lower than 0.05 percent;

step three, preparing a ceramic blank body by using the blank slurry treated in the step two, and sending the ceramic blank body into a kiln for biscuit firing for 5-6 hours at the temperature of 720-750 ℃ to obtain a biscuit;

step four, applying the slurry treated in the step two on the surface of the biscuit, after the slurry is dried, utilizing the black flower glaze slurry to screen print black flower patterns on the surface of the biscuit, and after the black flower glaze slurry is dried, repeatedly printing for three times;

step five, the biscuit printed with the black flower pattern is sent into a kiln and is fired for 7-8 hours at the temperature of 1280-1320 ℃, so as to obtain a semi-finished product, and the specific firing control is as follows:

and (3) low-temperature stage: raising the temperature in the kiln from normal temperature to 620-650 ℃, and burning for 1-2 h;

and (3) decomposition and oxidation stage: heating the kiln to 860 ℃ and 920 ℃, and burning the kiln for 4-6 hours;

and (3) high-temperature reduction stage: raising the temperature in the kiln to 1240-1260 ℃, and burning the kiln for 3-5 hours;

and (3) high-fire heat preservation stage: controlling the temperature in the kiln at 1280-1320 ℃, and burning the kiln for 7-8 hours;

and (3) natural cooling stage: cooling in the kiln to room temperature, wherein the cooling time is prolonged to more than 8 hours.

And step six, the protective glaze slurry after the surface treatment of the step two is applied to the semi-finished product prepared in the step five, and the protective glaze slurry is sent into a kiln and fired in a reducing atmosphere, wherein the firing temperature is 1120-.

Wherein, when wet ball milling is carried out on the blank slurry in the step one, the raw materials are ground in a ball mill for 24-28 hours by a wet method, the grinding medium is water, and the raw materials: ball: water 1:1.2-1.5: 1.2-1.5; when wet ball milling is carried out on the slurry in the first step, wet grinding is carried out on the raw materials in a ball mill for 25-30 hours, the grinding medium is water, and the raw materials are as follows: ball: water 1:1.8-2: 1.2-1.5; when wet ball milling is carried out on the blackish glaze slurry in the first step, wet grinding is carried out on raw materials in a ball mill for 32-36 hours, the grinding medium is water, and the raw materials are as follows: ball: water 1:1.8-2: 1.2-1.5; when the glaze slip is protected in the first step, wet grinding is carried out on raw materials in a ball mill for 32-36 hours, the grinding medium is water, and the raw materials are as follows: ball: water 1:2-2.2: 1.5-1.8;

in the fifth step, in the high-temperature reduction stage, the content of carbon monoxide is 5.4-5.7%, and the content of oxygen is 1.2-1.5%; in the high-fire heat preservation stage, the content of carbon monoxide is 6.8-7.5%, and the content of oxygen is 0.4-0.7%.

The thickness of the cosmetic soil is 0.3-0.5 mm; the thickness of the protective glaze slip is 0.4-0.6 mm.

Example 1

A white-bottom black-flower enamel comprises a blank body, makeup clay, black-flower glaze and protective glaze.

The blank body is composed of the following raw materials in parts by weight: 13 parts of plagioclase feldspar, 30 parts of quartz sand, 15 parts of kaolin, 22 parts of muscovite, 10 parts of calcite, 8 parts of sanidine, 5 parts of diatomite, 5 parts of zirconia and 1 part of magnesium oxide.

The cosmetic soil is prepared from the following raw materials in parts by weight: 25 parts of dolomite, 18 parts of borax, 15 parts of clam powder, 12 parts of talcum, 12 parts of anorthite, 5 parts of bentonite and 8 parts of wollastonite.

The black fancy glaze comprises the following raw materials in parts by weight: 5 parts of potash feldspar, 22 parts of purple gold soil, 12 parts of spodumene, 30 parts of ferromanganese ore, 5 parts of titanium oxide, 15 parts of germanized quartz and 1 part of cobalt oxide.

The protective glaze comprises the following raw materials in parts by weight: 22 parts of anorthite, 35 parts of limestone, 8 parts of kaolin, 12 parts of ball clay, 12 parts of sillimanite and 7 parts of transparent frit; specifically, the transparent frit comprises the following chemical components in percentage by mass: SiO 2₂：62.37％、Al₂O₃：15.63％、MgO：7.82％、ZnO：6.54％、TiO₂：1.75％、ZrO₂：2.16％、B₂O₃：2.87％、LiO₂：0.86％。

A preparation method of white black fancy glaze comprises the following steps:

weighing and proportioning raw materials of a blank body, makeup clay, black flower glaze and protective glaze according to a formula, respectively crushing the raw materials, mixing, and performing wet ball milling to prepare blank slurry, black flower glaze slurry and protective glaze slurry;

step two, the blank slurry, the slurry and the protective glaze slurry prepared in the step one are subjected to magnetic separation for multiple times to remove iron until the iron content in the blank slurry, the slurry and the protective glaze slurry is lower than 0.05 percent;

step three, preparing a ceramic blank body by using the blank slurry treated in the step two, and sending the ceramic blank body into a kiln for biscuiting for 6 hours at 720 ℃ to obtain a biscuit;

step four, applying the slurry treated in the step two on the surface of the biscuit, after the slurry is dried, utilizing the black flower glaze slurry to screen print black flower patterns on the surface of the biscuit, and after the black flower glaze slurry is dried, repeatedly printing for three times;

step five, the biscuit printed with the black flower patterns is sent into a kiln and is fired for 8 hours at the temperature of 1280 ℃ to obtain a semi-finished product, and the specific firing control is as follows:

and (3) low-temperature stage: heating the temperature in the kiln from normal temperature to 620 ℃, and burning the kiln for 2 hours;

and (3) decomposition and oxidation stage: heating the kiln to 860 ℃ for 6 hours;

and (3) high-temperature reduction stage: heating the kiln to 1240 ℃ and burning the kiln for 5 hours;

and (3) high-fire heat preservation stage: controlling the temperature in the kiln at 1280 ℃ and burning the kiln for 8 hours;

and (3) natural cooling stage: cooling in the kiln to room temperature, wherein the cooling time is prolonged to more than 8 hours.

And step six, applying the protective glaze slurry treated in the step two on the surface of the semi-finished product prepared in the step five, feeding the protective glaze slurry into a kiln, and firing the protective glaze slurry in a reducing atmosphere at the firing temperature of 1120 ℃.

Wherein, when wet ball milling is carried out on the blank slurry in the step one, the raw materials are wet-milled for 24 hours in a ball mill, the grinding medium is water, and the raw materials: ball: water 1:1.2: 1.5; when wet ball milling is carried out on the slurry in the first step, wet grinding is carried out on the raw materials in a ball mill for 25 hours, the grinding medium is water, and the raw materials are as follows: ball: water 1:1.8: 1.2; when the black flower glaze slurry is subjected to wet ball milling in the first step, the raw materials are subjected to wet grinding for 32 hours in a ball mill, the grinding medium is water, and the raw materials: ball: water 1:1.8: 1.5; when the glaze slip is protected in the first step and wet ball milling is carried out, the raw materials are ground in a ball mill for 32 hours by a wet method, the grinding medium is water, and the raw materials are as follows: ball: water 1:2: 1.5;

in the step five, in the high-temperature reduction stage, the content of carbon monoxide is 5.4%, and the content of oxygen is 1.5%; in the high-fire heat preservation stage, the content of carbon monoxide is 6.8%, and the content of oxygen is 0.7%.

The thickness of the cosmetic soil is 0.3 mm; the thickness of the protective glaze slip is 0.6 mm.

Example 2

A white-bottom black-flower enamel comprises a blank body, makeup clay, black-flower glaze and protective glaze.

The blank body is composed of the following raw materials in parts by weight: 18 parts of plagioclase feldspar, 25 parts of quartz sand, 20 parts of kaolin, 18 parts of muscovite, 15 parts of calcite, 5 parts of sanidine, 7 parts of diatomite, 2 parts of zirconium oxide and 3 parts of magnesium oxide.

The cosmetic soil is prepared from the following raw materials in parts by weight: 35 parts of dolomite, 10 parts of borax, 22 parts of clam powder, 15 parts of talcum, 8 parts of anorthite, 10 parts of bentonite and 5 parts of wollastonite.

The black fancy glaze comprises the following raw materials in parts by weight: 10 parts of potash feldspar, 15 parts of purple gold soil, 15 parts of spodumene, 25 parts of ferromanganese ore, 8 parts of titanium oxide, 10 parts of germanized quartz and 3 parts of cobalt oxide.

The protective glaze comprises the following raw materials in parts by weight: 28 parts of anorthite, 25 parts of limestone, 15 parts of kaolin, 8 parts of ball clay, 18 parts of sillimanite and 5 parts of transparent frit; specifically, the transparent frit comprises the following chemical components in percentage by mass: SiO 2₂：62.37％、Al₂O₃：15.63％、MgO：7.82％、ZnO：6.54％、TiO₂：1.75％、ZrO₂：2.16％、B₂O₃：2.87％、LiO₂：0.86％。

A preparation method of white black fancy glaze comprises the following steps:

weighing and proportioning raw materials of a blank body, makeup clay, black flower glaze and protective glaze according to a formula, respectively crushing the raw materials, mixing, and performing wet ball milling to prepare blank slurry, black flower glaze slurry and protective glaze slurry;

step two, the blank slurry, the slurry and the protective glaze slurry prepared in the step one are subjected to magnetic separation for multiple times to remove iron until the iron content in the blank slurry, the slurry and the protective glaze slurry is lower than 0.05 percent;

step three, preparing a ceramic blank body by using the blank slurry treated in the step two, and sending the ceramic blank body into a kiln for biscuiting for 5 hours at 750 ℃ to obtain a biscuit;

step four, applying the slurry treated in the step two on the surface of the biscuit, after the slurry is dried, utilizing the black flower glaze slurry to screen print black flower patterns on the surface of the biscuit, and after the black flower glaze slurry is dried, repeatedly printing for three times;

step five, the biscuit printed with the black flower patterns is sent into a kiln and is fired for 7 hours at the temperature of 1320 ℃ to obtain a semi-finished product, and the specific firing control is as follows:

and (3) low-temperature stage: heating the temperature in the kiln from normal temperature to 650 ℃, and burning the kiln for 1 h;

and (3) decomposition and oxidation stage: heating the kiln to 920 ℃ for 4 hours;

and (3) high-temperature reduction stage: heating the kiln to 1260 ℃, and burning the kiln for 3 hours;

and (3) high-fire heat preservation stage: controlling the temperature in the kiln at 1320 ℃, and burning the kiln for 7 hours;

and (3) natural cooling stage: cooling in the kiln to room temperature, wherein the cooling time is prolonged to more than 8 hours.

And step six, applying the protective glaze slurry treated in the step two on the surface of the semi-finished product prepared in the step five, feeding the protective glaze slurry into a kiln, and firing the protective glaze slurry in a reducing atmosphere at the firing temperature of 1150 ℃.

Wherein, when wet ball milling is carried out on the blank slurry in the step one, the raw materials are ground in a ball mill for 28 hours by a wet method, the grinding medium is water, and the raw materials: ball: water 1:1.5: 1.2; when wet ball milling is carried out on the slurry in the step one, the raw materials are ground in a wet method in a ball mill for 30 hours, the grinding medium is water, and the raw materials are as follows: ball: water 1:2: 1.5; when the black flower glaze slurry is subjected to wet ball milling in the first step, the raw materials are subjected to wet grinding for 36 hours in a ball mill, the grinding medium is water, and the raw materials: ball: water 1:2: 1.2; when the glaze slip is protected in the first step and wet ball milling is carried out, the raw materials are ground in a ball mill for 36 hours by a wet method, the grinding medium is water, and the raw materials are as follows: ball: water 1:2.2: 1.8;

in the step five, in the high-temperature reduction stage, the content of carbon monoxide is 5.7 percent, and the content of oxygen is 1.2 percent; in the high-fire heat preservation stage, the content of carbon monoxide is 7.5%, and the content of oxygen is 0.4%.

The thickness of the cosmetic soil is 0.5 mm; the thickness of the protective glaze slip is 0.4 mm.

Example 3

A white-bottom black-flower enamel comprises a blank body, makeup clay, black-flower glaze and protective glaze.

The blank body is composed of the following raw materials in parts by weight: 15 parts of plagioclase feldspar, 27 parts of quartz sand, 18 parts of kaolin, 20 parts of muscovite, 12 parts of calcite, 6 parts of sanidine, 6 parts of diatomite, 4 parts of zirconium oxide and 2 parts of magnesium oxide.

The cosmetic soil is prepared from the following raw materials in parts by weight: 30 parts of dolomite, 15 parts of borax, 18 parts of clam powder, 13 parts of talcum, 10 parts of anorthite, 7 parts of bentonite and 6 parts of wollastonite.

The black fancy glaze comprises the following raw materials in parts by weight: 8 parts of potash feldspar, 18 parts of purple gold soil, 13 parts of spodumene, 27 parts of ferromanganese ore, 6 parts of titanium oxide, 12 parts of germanized quartz and 2 parts of cobalt oxide.

The protective glaze comprises the following raw materials in parts by weight: 25 parts of anorthite, 30 parts of limestone, 12 parts of kaolin, 10 parts of ball clay, 15 parts of sillimanite and 6 parts of transparent frit; specifically, the transparent frit comprises the following chemical components in percentage by mass: SiO 2₂：62.37％、Al₂O₃：15.63％、MgO：7.82％、ZnO：6.54％、TiO₂：1.75％、ZrO₂：2.16％、B₂O₃：2.87％、LiO₂：0.86％。

A preparation method of white black fancy glaze comprises the following steps:

weighing and proportioning raw materials of a blank body, makeup clay, black flower glaze and protective glaze according to a formula, respectively crushing the raw materials, mixing, and performing wet ball milling to prepare blank slurry, black flower glaze slurry and protective glaze slurry;

step two, the blank slurry, the slurry and the protective glaze slurry prepared in the step one are subjected to magnetic separation for multiple times to remove iron until the iron content in the blank slurry, the slurry and the protective glaze slurry is lower than 0.05 percent;

step three, preparing a ceramic blank body by using the blank slurry treated in the step two, and sending the ceramic blank body into a kiln for biscuiting for 5.5 hours at 735 ℃ to obtain a biscuit;

step four, applying the slurry treated in the step two on the surface of the biscuit, after the slurry is dried, utilizing the black flower glaze slurry to screen print black flower patterns on the surface of the biscuit, and after the black flower glaze slurry is dried, repeatedly printing for three times;

step five, the biscuit printed with the black flower pattern is sent into a kiln and is fired for 7.5 hours at the temperature of 1300 ℃ to obtain a semi-finished product, and the specific firing control is as follows:

and (3) low-temperature stage: heating the temperature in the kiln from normal temperature to 635 ℃ and burning the kiln for 1.5 h;

and (3) decomposition and oxidation stage: heating the kiln to 890 ℃ for 5 hours;

and (3) high-temperature reduction stage: heating the kiln to 1250 ℃ for 4 hours;

and (3) high-fire heat preservation stage: controlling the temperature in the kiln at 1300 ℃ and the kiln burning time to be 7.5 hours;

and (3) natural cooling stage: cooling in the kiln to room temperature, wherein the cooling time is prolonged to more than 8 hours.

And step six, the protective glaze slurry obtained in the step five after the surface treatment in the step two is applied to the surface of the semi-finished product is sent into a kiln and is fired in a reducing atmosphere, wherein the firing temperature is 1135 ℃.

Wherein, when wet ball milling is carried out on the blank slurry in the step one, the raw materials are ground in a ball mill for 26 hours by a wet method, the grinding medium is water, and the raw materials: ball: water 1:1.3: 1.4; when wet ball milling is carried out on the slurry in the step one, the raw materials are ground in a wet method for 27 hours in a ball mill, the grinding medium is water, and the raw materials: ball: water 1:1.9: 1.4; when the black flower glaze slurry is subjected to wet ball milling in the first step, the raw materials are subjected to wet grinding for 34 hours in a ball mill, the grinding medium is water, and the raw materials: ball: water 1:1.9: 1.3; when the glaze slip is protected in the first step and wet ball milling is carried out, the raw materials are ground in a ball mill for 34 hours by a wet method, the grinding medium is water, and the raw materials are as follows: ball: water 1:2.1: 1.6;

in the step five, in the high-temperature reduction stage, the content of carbon monoxide is 5.5 percent, and the content of oxygen is 1.3 percent; in the high-fire heat preservation stage, the content of carbon monoxide is 7.2%, and the content of oxygen is 0.5%.

The thickness of the cosmetic soil is 0.4 mm; the thickness of the protective glaze slip is 0.5 mm.

The fired enamel uses white as the ground color, and forms black pattern patterns on the surface of the ground color, and the black pattern patterns and the ground color form sharp contrast, thereby greatly improving the expressive force of the black pattern, having unique artistic effect and meeting more market demands; the clam powder, anorthite, wollastonite and dolomite are introduced into the makeup clay to be matched to ensure the whiteness of the surface of a blank body, so that the whiteness of a fired semi-finished product can reach more than 83 degrees, the required whiteness requirement is met, and white glaze does not need to be additionally coated to ensure the whiteness of the glazed porcelain; borax and talc are introduced to match, so as to raise the fire-resistant temperature of the make-up clay, and the make-up clay and black fancy glaze can be fired at one time.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents and modifications within the scope of the description.