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Lithium-based heat-resistant porcelain fired in reducing flame and preparation method thereof

A lithium-based, heat-resistant technology, applied in the field of lithium-based heat-resistant porcelain and its preparation, can solve the problems that cannot meet the requirements of ceramic tea sets and limit the production of lithium-based heat-resistant porcelain, achieve excellent thermal shock resistance, promote sintering, Effect of improving sintering strength

Active Publication Date: 2021-11-12
JINGDEZHEN CERAMIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, Jingdezhen and other ceramic production areas mainly use reducing flames to fire porcelain, and the firing temperature is about 1300 ° C, which limits the production of lithium heat-resistant porcelain in these places, and cannot meet the requirements of many ceramic tea set manufacturers.

Method used

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  • Lithium-based heat-resistant porcelain fired in reducing flame and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of lithium-based heat-resistant porcelain fired in a reducing flame, the specific steps are:

[0024] (1) Ingredients according to the mass percentage of the material composition: 32% spodumene, 6% lithium-aluminum-silicate glass-ceramic, 9% cordierite, 5% zircon, 43% kaolin, and 5% bentonite;

[0025] (2) Put the raw materials in step (1) into a ball mill for 20 hours;

[0026] (3) Dry the green body made from the raw materials in step (2) at 80°C for 8 hours;

[0027] (4) Glaze the green body obtained from the raw materials in step (3) and place it in a reducing atmosphere shuttle kiln for firing. The total firing time is 380 minutes, the maximum firing temperature is 1290°C, and the temperature is kept for 20 minutes, and then The furnace is naturally cooled to obtain the product.

[0028] The coefficient of expansion of the product is 2.3×10 -6 / ℃, whiteness is 75.

Embodiment 2

[0030] A preparation method of lithium-based heat-resistant porcelain fired in a reducing flame, the specific steps are:

[0031] (1) Ingredients according to the mass percentage of material composition: 40% spodumene, 4% lithium aluminum silicon glass-ceramic, 5% cordierite, 1% zircon, 40% kaolin, 10% bentonite;

[0032] (2) Put the raw materials in step (1) into a ball mill for 21 hours;

[0033] (3) Dry the green body made from the raw materials in step (2) at 70°C for 12 hours;

[0034] (4) Glaze the green body obtained from the raw materials in step (3) and place it in a reducing atmosphere shuttle kiln for firing. The total firing time is 400 minutes, the maximum firing temperature is 1300°C, and the temperature is kept for 25 minutes, and then The furnace is naturally cooled to obtain the product.

[0035] The coefficient of expansion of the product is 2.5×10 -6 / ℃, whiteness is 72.

Embodiment 3

[0037] A preparation method of lithium-based heat-resistant porcelain fired in a reducing flame, the specific steps are:

[0038] (1) Ingredients according to the mass percentage of the material composition: 37% spodumene, 4% lithium-aluminum-silicate glass-ceramic, 8% cordierite, 3% zircon, 33% kaolin, and 15% bentonite;

[0039] (2) Put the raw materials in step (1) into a ball mill for 22 hours;

[0040] (3) Dry the green body made from the raw materials in step (2) at a temperature of 50°C for 14 hours;

[0041] (4) Glaze the green body obtained from the raw materials in step (3) and place it in a reducing atmosphere shuttle kiln for firing. The total firing time is 410 minutes, the maximum firing temperature is 1310°C, and the temperature is kept for 30 minutes, and then The furnace is naturally cooled to obtain the product.

[0042] The coefficient of expansion of the product is 2.6×10 -6 / ℃, whiteness is 70.

[0043] The mass percentage that the glaze composition us...

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Abstract

The invention relates to a lithium heat-resistant porcelain fired in a reducing flame and a preparation method thereof. The mass percentage of the material composition of the heat-resistant porcelain body is: 30-40 wt% of spodumene, lithium-aluminum-silicon microcrystal Glass 3-6 wt%, cordierite 5-10 wt%, zircon 1-5 wt%, kaolin 30-45 wt%, bentonite 3-15 wt%, and after batching, ball milling, drying, glazing, reducing flame A product is obtained after firing in an atmosphere, and the coefficient of expansion of the product is 2.3 to 2.7×10 ‑6 / °C, whiteness is 70-75. The heat-resistant lithium porcelain of the present invention is fired with a reduction flame, which breaks through the traditional process that can only be fired with an oxidizing flame, and the product has higher whiteness and better thermal expansion performance, so it has broad market prospects.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials (ceramics), and in particular relates to a heat-resistant lithium porcelain fired in a reducing flame and a preparation method thereof. Background technique [0002] Lithium porcelain products have a very low coefficient of thermal expansion, so they have excellent resistance to rapid cooling and rapid heating. Since it was prepared into daily-use ceramic products in the 1980s, it has been deeply loved by people. Compared with traditional casserole, it can withstand much higher temperature drastic changes, and now it can achieve a temperature difference of 650 °C. The service life is also much longer than that of casserole, and the normal service life is more than 1 year. [0003] However, the current lithium-based heat-resistant porcelain is fired in an oxidizing atmosphere, and the firing temperature is mostly 1250-1280°C. According to literature reports (Wang Humiao. Research ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/24C04B33/13C04B33/04
CPCC04B33/04C04B33/13C04B33/24C04B2235/3427C04B2235/3472C04B2235/3481C04B2235/36C04B2235/6567C04B2235/9607C04B2235/9646
Inventor 谭训彦胡浪李秋妍何杰
Owner JINGDEZHEN CERAMIC UNIV
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