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Preparation method of glazing-free white porcelain

A glaze-free, white porcelain technology, applied to clay products, applications, household utensils, etc., can solve the problems of increasing processes, prolonging production time, and limited market audience, and achieves the goal of reducing production costs, saving production time, and saving process steps Effect

Active Publication Date: 2016-08-24
德化东华陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The preparation method of ceramic products usually includes firing the mud body first and then glaze the surface of the fired mud body product to form a modern bright and clean ceramic vessel. Dehua white porcelain is characterized by its fine production, firm texture, crystal clear as Jade, the glaze is moist like fat, so it has good names such as "ivory white", "lard white" and "velvet white". It has a unique style in the white porcelain system in my country. The existing white porcelain preparation method is to achieve this effect. It is inseparable from the fine porcelain clay and special glaze. However, the special glaze not only makes the surface of the porcelain achieve the desired effect, but also increases the process, prolongs the production time, and increases the production cost. Ceramic ware is also more likely to cause modern people's worries
[0004] The invention patent of Chinese patent CN104058727B provides an antique natural color porcelain, and proposes a method for producing ceramic products without glaze, which solves the problem of heavy metals in the glaze in the prior art, but the finished product can only have antique texture in terms of fineness , without the whiteness and transparency of modern ceramics, especially Dehua white porcelain, the market audience is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of glaze-free white porcelain:

[0029] Step 1, the raw materials by weight: 52 parts by weight of kaolin, 43 parts by weight of potassium albite feldspar, 3 parts by weight of quartz, 2 parts by weight of talc, mixed with 1765 parts by weight of water glass solution and stirred Grind for 38 hours to obtain base powder;

[0030] Step 2, passing the above-mentioned base powder through a 120-mesh sieve, and repeating it three times to obtain fine base powder;

[0031] Step 3, removing iron from the fine powder processed in step 2;

[0032] Step 4, grouting the fine billet powder processed in step 3 as slurry;

[0033] Step 5, the slurry is injected into the mold to form a mud blank;

[0034] Step 6, gradually heating and firing the mud body from room temperature through the stage-by-stage linear heating curve y=kpt, and the process values ​​at each stage are as follows:

[0035] In the first stage, y=390°C, t=90, k=0.7, the mud is dried to remove ...

Embodiment 2

[0041] A preparation method of glaze-free white porcelain:

[0042] Raw materials by weight: 54 parts by weight of Guangxi kaolin, 40 parts by weight of Indonesian albite feldspar, 5 parts by weight of Jiangxi quartz, 1 part by weight of Fujian talc, mixed with 1765 parts by weight of water glass solution After grinding for 38 hours to obtain the base powder; pass the base powder through a 120-mesh sieve, and repeat three times to obtain the fine base powder;

[0043] The firing of described mud base is:

[0044] In the first stage, y=350°C, t=90, k=0.7, the mud is dried to remove moisture;

[0045] The second stage is y=750°C, t is 90, k=0.9, preheated and fired, and the temperature is further raised to ensure that the mud is heated evenly; the third stage is y=1100°C, t is 140min, k=1; the fourth stage y=1250°C, t=120min, k=1; the fifth stage y=1300°C, t=60, k=1; the above-mentioned firing makes the internal reaction of the clay body mild, which is conducive to the formati...

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Abstract

The invention relates to a preparation method of porcelain and provides a preparation method of glazing-free white porcelain. By adopting the preparation method, a glazing step after firing is omitted, product production period is shortened, and production cost is lowered especially; flatness and brightness of the surface of a porcelain product prepared by the method are maintained, and appearance of the product still has transparent and clean sense similar to that after being glazed. The glazing-free white porcelain comprises, by weight, 50-55 parts of kaolin, 38-42 parts of alkalifeldspar, 3-5 parts of quartz and 1-2 parts of talc powder. The preparation method includes steps: treating above raw materials to form a clay blank; heating and firing the clay blank from room temperature by means of staged linear temperature rising, wherein a temperature rise curve of each stage is y=kxPxt, y refers to temperature DEG C, P refers to power of a kiln, t refers to time min, and value of a coefficient k is greater than or equal to 0 and less than or equal to 1.

Description

[0001] technical field [0002] The invention relates to a preparation method of ceramics, in particular to a preparation method of glaze-free white porcelain. Background technique [0003] The preparation method of ceramic products usually includes firing the mud body first and then glaze the surface of the fired mud body product to form a modern bright and clean ceramic vessel. Dehua white porcelain is characterized by its fine production, firm texture, crystal clear as Jade, the glaze is moist like fat, so it has good names such as "ivory white", "lard white" and "velvet white". It has a unique style in the white porcelain system in China. The existing white porcelain preparation method is to achieve this effect. It is inseparable from the fine porcelain clay and special glaze. However, the special glaze not only makes the surface of the porcelain achieve the desired effect, but also increases the process, prolongs the production time, and increases the production cost. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/32C04B33/13
CPCC04B33/13C04B33/24C04B33/32C04B2235/3201C04B2235/3418C04B2235/3427C04B2235/3472C04B2235/656
Inventor 蔡佩荣
Owner 德化东华陶瓷有限公司
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