Iron yellow glaze fired by reducing flame and preparation method of iron yellow glaze

Abstract

The invention discloses iron yellow glaze fired by reducing flame and a preparation method of the iron yellow glaze, and belongs to the technical field of domestic ceramics. The iron yellow glaze fired by reducing flame comprises the following raw materials in parts by weight: 38-42 parts of feldspar, 8-12 parts of quartz, 8-12 parts of talc, 8-12 parts of dolomite, 12-15 parts of bone carbon, 10-15 parts of iron oxide red, 8-12 parts of Jiepai mud, 3-8 parts of Longyan soil and 4-8 parts of titanium dioxide. The preparation method comprises the following steps: weighing raw materials, adding water, stirring, carrying out ball milling, glazing, firing and the like. The prepared yellow glaze is good in water resistance, high in Vickers hardness, good in wear resistance, good in thermal shock resistance, glossy in glaze surface and fine and smooth in hand feeling.

Description

Technical Field

[0001] The invention belongs to the technical field of daily-use ceramics, and in particular relates to an iron yellow flower glaze fired by reducing flame and a preparation method thereof. Background Art

[0002] Daily-use ceramics are one of the most common utensils in people's daily lives. They not only meet their use value, but also have ornamental and artistic value. Iron red flower glaze has always been loved by the public for its dignified, colorful characteristics, showing its noble temperament. The traditional flower glaze production process is to apply two or more glazes with different melting points on the porcelain body. During the glaze firing process, due to the different melting points of different glazes, they flow relatively, making the glaze surface produce colorful flow patterns and transition colors between the bottom glaze. The production process is relatively cumbersome and not suitable for mass production.

[0003] The Chinese invention patent application with publication number CN105776862A discloses a kiln-changed sorghum safflower glaze for high-performance ceramic containers and a preparation method thereof, comprising the following steps: the glazes are composed of the following glazes in parts by weight: 30 parts of feldspar, 5 parts of quartz, 5 parts of kaolin, 20 parts of talc, 10 parts of glass powder, 15 parts of dolomite, 2 parts of chromium oxide, 5 parts of cobalt oxide, 5 parts of iron oxide, and 7 parts of titanium dioxide; the glazes are ball-milled separately, sieved and then prepared into glaze slurry; after glazing the body, the body is calcined at 1220-1250°C for 20-23 hours. The patent provides a preparation method for safflower glaze, and the firing time is long, and the glaze effect is average.

[0004] The Chinese invention patent with the publication number CN107352798B discloses a saffron glaze and a preparation method thereof, the saffron glaze is made of the following raw materials in weight percentage: 11-16% potassium feldspar, 12-15% calcite, 18-28% black stone, 40-45% black medicinal soil, 5-8% plant ash, 0.3-0.5% iron red powder, 0.2-0.5% talc, and 0.2-0.5% manganese powder. It is also a crystallized saffron glaze product of dark red iron with metallic luster.

[0005] There are no iron yellow flower glaze products on the market, and the preparation technology of iron yellow flower glaze in the existing technology is also very limited. Therefore, developing an iron yellow flower glaze product with good glaze effect based on the traditional iron red flower glaze will have good use value, ornamental value and artistic value. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an iron yellow flower glaze fired by reducing flame and a preparation method thereof, so as to obtain the iron yellow flower glaze with good water resistance, high Vickers hardness, good wear resistance, good thermal shock resistance, good glaze gloss and delicate hand feel.

[0007] The content of the present invention includes:

[0008] A reducing flame fired iron yellow flower glaze comprises the following raw materials in parts by weight: 38-42 parts of feldspar, 8-12 parts of quartz, 8-12 parts of talc, 8-12 parts of dolomite, 12-15 parts of bone carbon, 10-15 parts of iron red, 8-12 parts of Jiepai mud, 3-8 parts of Longyan soil and 4-8 parts of titanium dioxide.

[0009] In one embodiment, the iron yellow glaze fired by reducing flame includes the following raw materials in parts by weight: 40 parts of feldspar, 10 parts of quartz, 10 parts of talc, 10 parts of dolomite, 15 parts of bone carbon, 10 parts of iron red, 10 parts of Jiepai mud, 5 parts of Longyan soil, and 5 parts of titanium dioxide.

[0010] Among the raw materials, the mineral raw materials are feldspar, quartz, talc, dolomite, Longyan soil, Jiepai mud, the chemical raw materials are bone carbon and titanium dioxide, and the colorant is iron red.

[0011] The chemical composition of the mineral raw materials is shown in Table 1 below:

[0012] Table 1 Chemical composition of mineral raw materials (%)

[0013]

[0014] Another object of the present invention is to provide a method for preparing the above-mentioned iron yellow flower glaze fired by reducing flame, comprising the following steps:

[0015] S1. Accurately weigh the raw materials;

[0016] S2. Add water to the raw materials and stir evenly;

[0017] S3, ball-milling the raw materials with water to obtain glaze;

[0018] S4, applying glaze on the blank;

[0019] S5. Leave it to dry and then fire it to obtain iron yellow glaze.

[0020] In one embodiment, the ratio of raw material to water in step S2 is 1:0.6.

[0021] In one embodiment, the ball milling rate in step S3 is 550-650 r / min.

[0022] In one embodiment, the ball milling time in step S3 is 10-20 minutes.

[0023] In one embodiment, the glaze fineness in step S3 is 0.02%-0.05%.

[0024] In one embodiment, the glazing concentration in step S4 is 42 degrees.

[0025] In one embodiment, the firing temperature in step S5 is 1200-1280°C.

[0026] In one embodiment, the firing time in step S5 is 8 hours.

[0027] Beneficial effects of the present invention:

[0028] (1) The materials selected for the glaze of the present invention include silicon oxide, Longyan soil, and Jiepai mud to improve the adhesion between the glaze and water, so that the glaze is not easy to fall off during firing. The water resistance and wear resistance of the ceramic are improved by introducing silicon oxide, aluminum oxide, and sodium silicate.

[0029] (2) By introducing excessive amounts of iron oxides as colorants and seeding agents in the glaze, as the iron content increases, the overall color of the glaze changes from yellow-brown to brown-red, with the brown surface covered with large yellow flowers with red cores, making the glaze colorful;

[0030] (3) The addition of titanium dioxide makes the matte glaze with high calcium and magnesium content of talc and dolomite form fine crystal patterns; the addition of dolomite is conducive to reducing the firing temperature and improving the hardness and wear resistance of the glaze; the addition of talc is conducive to improving the fineness of the glaze;

[0031] (4) Phosphate is introduced through bone carbon to reduce the firing temperature of the glaze, increase the melting performance of the glaze during firing, and improve the glossiness and thermal shock resistance of the glaze;

[0032] (5) The raw materials in the iron yellow flower glaze formula of the present application must be added strictly in accordance with the requirements to obtain an iron yellow flower glaze with good water resistance, high Vickers hardness, good wear resistance, good thermal shock resistance, good gloss, colorful glaze surface and delicate hand feel. DETAILED DESCRIPTION

[0033] Example 1

[0034] This example is a reducing flame fired iron yellow glaze, comprising the following raw materials by weight: 40 parts of feldspar, 10 parts of quartz, 10 parts of talc, 10 parts of dolomite, 15 parts of bone carbon, 10 parts of iron red, 10 parts of Jiepai mud, 5 parts of Longyan soil, and 5 parts of titanium dioxide;

[0035] The glaze slurry preparation in this example consists of the following steps:

[0036] S1. Accurately weigh the raw materials according to the formula weight;

[0037] S2. After weighing, add water according to the ratio of material to water of 1:0.6;

[0038] S3, the material water is placed in a ball milling tank, the ball milling speed is 600r / min, and the ball milling is carried out for 15 minutes;

[0039] S4, glaze water with a concentration of 42 degrees, and the blank material is NT6 made by Hualian for glazing;

[0040] S5. After glazing, place it to dry, and then fire it in a reducing flame at 1250° for 8 hours to obtain the iron yellow glaze.

[0041] Example 2

[0042] This example is a reducing flame fired iron yellow glaze, comprising the following raw materials by weight: 38 parts of feldspar, 12 parts of quartz, 8 parts of talc, 12 parts of dolomite, 12 parts of bone carbon, 15 parts of iron red, 12 parts of Jiepai mud, 8 parts of Longyan soil, and 4 parts of titanium dioxide;

[0043] The preparation method is the same as Example 1.

[0044] Example 3

[0045] This example is a reducing flame fired iron yellow glaze, comprising the following raw materials by weight: 42 parts of feldspar, 8 parts of quartz, 12 parts of talc, 8 parts of dolomite, 14 parts of bone carbon, 12 parts of iron red, 8 parts of Jiepai mud, 5 parts of Longyan soil, and 6 parts of titanium dioxide;

[0046] The preparation method is the same as Example 1.

[0047] Comparative Example 1

[0048] 10 parts of dolomite were replaced by 10 parts of calcite, and the rest was the same as in Example 1.

[0049] Comparative Example 2

[0050] 15 parts of Jiepai mud, and the rest are the same as in Example 1.

[0051] Comparative Example 3

[0052] 12 parts of titanium dioxide, and the rest are the same as in Example 1.

[0053] Comparative Example 4

[0054] Talc replaces dolomite, 20 parts of talc and 0 parts of dolomite, and the rest is the same as in Example 1.

[0055] Comparative Example 5

[0056] This example is a reducing flame fired iron yellow glaze, comprising the following raw materials by weight: 45 parts of feldspar, 6 parts of quartz, 15 parts of talc, 6 parts of dolomite, 8 parts of bone carbon, 5 parts of iron red, 18 parts of Jiepai mud, 10 parts of Longyan soil, and 2 parts of titanium dioxide;

[0057] The preparation method is the same as Example 1.

[0058] Comparative Example 6

[0059] 0 part of bone carbon, and the rest are the same as in Example 1.

[0060] Comparative Example 7

[0061] This example is a reducing flame fired iron yellow glaze, the formula is the same as Example 1;

[0062] The glaze slurry preparation in this example consists of the following steps:

[0063] S1. Accurately weigh the raw materials according to the formula weight;

[0064] S2. After weighing, add water according to the ratio of material to water of 1:0.55;

[0065] S3, the material water is placed in a ball milling tank, the ball milling speed is 600r / min, and the ball milling is carried out for 15 minutes;

[0066] S4, glaze water with a concentration of 45 degrees, and the blank is made of Hualian's self-made NT6 material for glazing;

[0067] S5. After glazing, place it to dry, and then fire it in a reducing flame at 1200° for 8 hours to obtain the iron yellow glaze.

[0068] The yellow flower glaze products obtained in Examples 1-3 and Comparative Examples 1-7 were tested, and the results are shown in Table 2 below.

[0069] Table 2 Test results

[0070]

[0071] The formula and preparation method of Examples 1-3 are within the scope of this application. The yellow flower glaze obtained has good water resistance, high Vickers hardness, good wear resistance, good thermal shock resistance, good glaze surface, and obvious crystallization of the yellow base and red core.

[0072] In Comparative Example 1, dolomite is replaced by calcite, and the changes in the composition of each component lead to the disappearance of the glaze crystallization points.

[0073] In comparative example 2, the content of Jiepai mud was increased, which resulted in a significant decrease in glossiness, and the glaze surface gradually changed from bright yellow spot crystals to matte block crystals.

[0074] In comparative example 3, the titanium dioxide content was increased, resulting in a significant decrease in glossiness, and the yellow crystalline spots on the glaze gradually disappeared.

[0075] In comparative example 4, talc is used instead of dolomite, so that the magnesium content in the glaze is reduced, resulting in a matte glaze surface and disappearance of yellow crystal points.

[0076] The glaze formula of Comparative Example 5 is not within the scope of the present application, resulting in changes in the content of each component, which affects the crystallization of the glaze surface.

[0077] In Comparative Example 6, no bone carbon was added, resulting in a significant decrease in the glossiness of the glaze and no crystallization on the glaze surface.

[0078] Comparative Example 7, the yellow flower glaze prepared not according to the preparation method of the present application has no crystallization on the glaze surface and the glaze accumulation is black.

[0079] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0080] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A reducing flame fired iron yellow glaze, characterized in that: The invention comprises the following raw materials in parts by weight: 38-42 parts of feldspar, 8-12 parts of quartz, 8-12 parts of talc, 8-12 parts of dolomite, 12-15 parts of bone carbon, 10-15 parts of red iron, 8-12 parts of Jiepai mud, 3-8 parts of Longyan soil and 4-8 parts of titanium dioxide.

2. The reducing flame fired iron yellow glaze according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 40 parts of feldspar, 10 parts of quartz, 10 parts of talc, 10 parts of dolomite, 15 parts of bone carbon, 10 parts of red iron, 10 parts of Jiepai mud, 5 parts of Longyan soil and 5 parts of titanium dioxide.

3. A method for preparing the iron yellow flower glaze fired by reducing flame as claimed in claim 1 or 2, characterized in that: The following steps are involved: S1. Accurately weigh the raw materials; S2. Add water to the raw materials and stir evenly; S3, ball-milling the raw materials with water to obtain glaze; S4, applying glaze on the blank; S5. Leave it to dry and then fire it to obtain iron yellow glaze.

4. The method for preparing the iron yellow flower glaze fired by reducing flame as claimed in claim 3, characterized in that: The ratio of raw material to water in step S2 is 1:0.

6.

5. The method for preparing the iron yellow flower glaze fired by reducing flame as claimed in claim 3, characterized in that: The ball milling rate in step S3 is 550-650 r / min.

6. The method for preparing the iron yellow flower glaze fired by reducing flame as claimed in claim 3, characterized in that: The ball milling time in step S3 is 10-20 minutes.

7. The method for preparing the iron yellow flower glaze fired by reducing flame as claimed in claim 3, characterized in that: In step S3, the glaze fineness is 0.02%-0.05%.

8. The method for preparing the iron yellow flower glaze fired by reducing flame as claimed in claim 3, characterized in that: The glazing concentration in step S4 is 42 degrees.

9. The method for preparing the iron yellow flower glaze fired by reducing flame as claimed in claim 3, characterized in that: The firing temperature in step S5 is 1200-1280°C.

10. The method for preparing the iron yellow flower glaze fired by reducing flame according to any one of claims 3 to 9, characterized in that: The firing time in step S5 is 8 hours.

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