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Preparation method of bone china low-temperature hard glaze

A porcelain, low-temperature technology, applied in the field of preparation of bone china low-temperature hard glaze, can solve the problems of difficult cleaning, poor acid and alkali resistance, poor stain resistance, etc.

Inactive Publication Date: 2021-09-07
JIANGSU GAOCHUN CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this low-temperature enamel bone china product also has obvious deficiencies in the use process: first, the glaze hardness is low, which is obviously lower than that of ordinary porcelain products, and scratches are easily produced during use, especially for western tableware; It is poor in stain resistance, and it is difficult to clean after staining. The essence is poor acid and alkali resistance.
The inadequacies of these bone china products in the process of use seriously restrict its due practicability

Method used

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  • Preparation method of bone china low-temperature hard glaze

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A low-temperature hard glaze for bone china, consisting of the following mass fraction raw materials: Li 2 O: 0.48%, B 2 o 3 : 5.03%, CaO; 8.00%, ZnO: 8.76%, K 2 O: 5.70%, Na 2 O: 4.12%, SiO 2 :57.47%, Al 2 o 3 : 10.44%.

[0024] Weigh each raw material according to the mass fraction, mix them evenly and put them into a high-temperature furnace, fully melt them at 1400°C, and put the uniformly melted melt directly into water to quench to obtain a frit, add 2% Suzhou soil to the frit, Wet balls are ground into a glaze slurry in a ball mill for glazing operation, and glaze firing is carried out at 1080°C to obtain a low-temperature hard glaze for bone china. The hardness of the glazed surface reaches 6.3GPa, and the acid and alkali resistance of the glazed surface reaches the grade A of acid and alkali resistance of the glazed surface of daily-use ceramics.

Embodiment 2

[0026] A low-temperature hard glaze for bone china, consisting of the following mass fraction raw materials: Li 2 O: 0.48%, B 2 o 3 : 5.03%, CaO; 8.00%, ZnO: 8.76%, K 2 O: 5.70%, Na 2 O: 4.12%, SiO 2 :57.47%, Al 2 o 3 : 10.44%.

[0027] Weigh each raw material according to the mass fraction, mix them evenly and put them into a high-temperature furnace, fully melt them at 1400°C, and put the uniformly melted melt directly into water to quench to obtain a frit, add 2% Suzhou soil to the frit, Wet balls are ground into a glaze slurry in a ball mill for glazing operation, and glaze firing is carried out at 1150°C to obtain a low-temperature hard glaze for bone china. The hardness of the glazed surface reaches 6.3GPa, and the acid and alkali resistance of the glazed surface reaches the grade A of acid and alkali resistance of the glazed surface of daily-use ceramics.

Embodiment 3

[0029] Utilize the bone china low-temperature hard glaze prepared by embodiment 1 to burn moonlight 8-inch flat dish, comprising the following steps:

[0030] (1) make the green body with bone china material;

[0031] (2) high-temperature bisque firing of the above green body at 1250°C;

[0032](3) Use the bone china low-temperature hard glaze prepared in Example 1 on the product after bisque firing to carry out medium-temperature glaze firing after glazing, and the glaze firing temperature is 1050° C. to obtain a finished moonlight 8-inch flat plate.

[0033] The finished moonshine 8-inch flat plate was tested for performance indicators such as lead migration, cadmium migration, thermal shock resistance, and glaze hardness. The test results are shown in Table 1: The indicators tested for this sample are lead migration, cadmium migration It meets the requirements of the migration test conditions for products used under normal temperature conditions in GB 4806.4-2016 "National...

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Abstract

The invention discloses a preparation method of bone china low-temperature hard glaze, and belongs to the technical field of ceramic production. The low-temperature hard glaze is prepared from the following raw materials in percentage by mass: 0.10 percent to 0.90 percent of Li2O, 0.50 percent to 6.00 percent of B2O3, 6.00 percent to 11.00 percent of CaO, 7.00 percent to 10.00 percent of ZnO, 3.00 percent to 6.00 percent of K2O, 3.00 percent to 6.00 percent of Na2O, 55.00 percent to 65.00 percent of SiO2 and 7.00 percent to 11.00 percent of Al2O3, wherein the sum of the mass fractions of the raw materials is 100 percent. The use amount of ZnO in the existing low-temperature glaze is reduced, a proper amount of Li2O and B2O3 are added, and the use amount of CaO is increased, so that the hardness is increased to 6.3 GPa on the premise of not increasing the glaze firing temperature, and the acid and alkali resistance of the glaze surface reaches the acid and alkali resistance level A of the domestic ceramic glaze surface.

Description

technical field [0001] The invention belongs to the technical field of ceramic production, and in particular relates to a preparation method of low-temperature hard glaze for bone china. Background technique [0002] Bone china is porcelain made by adding herbivorous animal bone charcoal powder to ceramic raw materials. Bone china is characterized by light texture, fine and hard, not easy to wear and tear, high whiteness, good transparency, crystal clear, white and translucent under the irradiation of visible light. Bone china is famous both at home and abroad for being "thin as paper, white as jade, bright as a mirror, and sound like a chime", and is the best in ceramics. Bone charcoal for the production of bone china is made by degreasing, degumming, and burning at high temperature from the bones of herbivores. The production of bone china is different from traditional porcelain. It must be fired at high temperature and glazed at low temperature. out of shape. Then app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/04C03C8/14
CPCC03C8/04C03C8/14
Inventor 顾永成张德军陈春明
Owner JIANGSU GAOCHUN CERAMICS
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