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

A lithium and heat-resistant technology, applied in clay products, other household appliances, applications, etc., can solve the problems of inability to meet the requirements of ceramic tea sets, limit the production of lithium heat-resistant porcelain, achieve excellent thermal shock resistance, and promote sintering. , the effect of reducing the cost of raw materials

Active Publication Date: 2019-07-19
JINGDEZHEN CERAMIC INSTITUTE
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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 heat-resistant porcelain fired in reducing flame and preparation method thereof
  • Lithium 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) According to the mass percentage of material composition: 37% spodumene, 4% lithium aluminum silicon glass-ceramic, 8% cordierite, 3% zircon, 33% kaolin, 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 highest 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 used in above-mentioned...

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Abstract

The invention relates to lithium heat-resistant porcelain fired in reducing flame and a preparation method of the lithium heat-resistant porcelain. The heat-resistant porcelain body comprises the following materials in percentage by mass: 30-40wt% of spodumene, 3-6wt% of lithium aluminum silicate glass ceramics, 5-10wt% of cordierite, 1-5wt% of zirconite, 30-45wt% of kaolin and 3-15wt% of bentonite. The product (the lithium heat-resistant porcelain) is obtained by proportioning, ball milling, drying, glazing and firing in a reducing flame atmosphere. The expansion coefficient of the product is(2.3-2.7) x 10<-6> / DEG C, and the whiteness of the product is 70-75. The lithium heat-resistant porcelain is fired by adopting reducing flame, the traditional process of only firing by adopting oxidizing flame is broken through, and the obtained product is higher in whiteness and better in thermal expansion property, so that the lithium heat-resistant porcelain has a wide market prospect.

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 Applications(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 INSTITUTE