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High acid and alkali resistance lead-free cadmium frit glaze for bone china

A lead-free frit and bone china technology, which is applied in the field of ceramic glaze, can solve the problems of no research and discussion on the chemical stability of the enamel, and insufficient attention to the chemical stability of the enamel, that is, acid and alkali resistance. The effect of poor acid and alkali resistance and lead-containing problems, good glaze adaptability, and strong acid and alkali resistance

Inactive Publication Date: 2011-12-07
张垠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical stability of enamel, that is, acid and alkali resistance, has not been given enough attention, and the chemical stability of enamel has not been studied and discussed in the design of the formula.

Method used

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  • High acid and alkali resistance lead-free cadmium frit glaze for bone china
  • High acid and alkali resistance lead-free cadmium frit glaze for bone china

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The high acid and alkali resistance lead-free frit glaze described in Example 1 is prepared from the following raw materials by weight:

[0024] Quartz 28.0%, potassium feldspar 30.0%, alumina 4.0%, titanium dioxide 0.5%, boric acid 25.5.0%, limestone 2.0%, calcined talc 1.0%, lithium carbonate 5.0%, sodium carbonate 4.0%.

[0025] The ingredients are mixed evenly, melted in a frit furnace at 1340-1350°C, and quenched by water to obtain a frit. Then the frit is ground into a glaze slurry with water as a medium at room temperature in a ball mill, and the fineness of the glaze slurry is controlled to be less than 10 μm and the particle size accounts for 81-83%.

[0026] The prepared glaze paste is applied to the biscuit-fired high-grade bone china blank, and fired at a temperature of 1100-1150° C. to obtain a high-quality bone china product. The enamel surface of the product is fine, smooth, smooth and glossy. At the same time, it has been confirmed by experiments that ...

Embodiment 2

[0028] The high acid and alkali resistance lead-free frit glaze described in Example 2 is prepared from the following raw materials by weight:

[0029] Quartz 29.5%, feldspar 27.0%, alumina 3.5%, titanium dioxide 1.0%, boric acid 26.0%, limestone 1.5%, calcined talc 2.0%, lithium carbonate 5.0%, sodium carbonate 4.5%.

[0030] Mix the ingredients evenly, melt them in a frit furnace at 1350-1360°C, and quench the frit with water. Then the frit is ground into a glaze slurry at room temperature with water as a medium in a ball mill, and the particles with a particle size of less than 10 μm in the fineness of the glaze slurry account for 82.0-84.0%.

[0031]The prepared glaze slurry is applied to the biscuit-fired high-grade bone china blank, and fired at a temperature of 1120-1170° C. to obtain a high-quality bone china product. The enamel surface of the product is fine, smooth, smooth and glossy. At the same time, it has been confirmed by experiments that the content of lead, ...

Embodiment 3

[0033] The high acid and alkali resistance lead-free frit glaze described in Example 3 is prepared from the following raw materials by weight:

[0034] Quartz 31.0%, potassium feldspar 31.5.0%, alumina 3.0%, titanium dioxide 0.5%, boric acid 24.0%, limestone 1.0%, calcined talc 1.5%, lithium carbonate 4.5%, sodium carbonate 3.0%.

[0035] Mix the ingredients evenly, melt them in a frit furnace at 1350-1360°C, and quench the frit with water. Then the frit is ground into a glaze slurry at room temperature with water as a medium in a ball mill, and the fineness of the glaze slurry is controlled to be 82.0-84.0%.

[0036] The prepared glaze paste is applied to the biscuit-fired high-grade bone china blank, and fired at a temperature of 1110-1160° C. to obtain a high-quality bone china product. The enamel surface of the product is fine, smooth, smooth and glossy. At the same time, it has been confirmed by experiments that the content of lead, cadmium, zinc, barium and bismuth in ...

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Abstract

The invention relates to a ceramic glaze, in particular to a high acid-resistant and alkali-resistant lead-free frit glaze for bone china used for producing high-quality lead-free bone china products. The chemical weight percentage of the high acid and alkali resistant lead-free frit glaze is as follows: SiO 2 58.0-66.0%, Al 2O 3 10.0-15.0%, TiO 2 0.0-1.0%, CaO 0.5-2.0, MgO 0.0-1.0%, K 2O 2.0-6.0%, Na 2O 2.0-6.0%, Li 2O 2.0-6.0%, B 2O 3 15.0-25.0%. The high acid and alkali resistant lead-free frit glaze of the present invention does not contain any lead, cadmium, zinc, barium, bismuth and other heavy metal element components in its raw material composition, and a certain amount of alkali metal oxides, TiO2 and boric acid are added. The composition is simple, scientific and reasonable, and easy to implement; the blank glaze has good adaptability, especially suitable for the characteristics of large temperature differences in domestic kilns; the finished porcelain glaze surface after firing is fine, smooth, smooth, and good gloss; the glaze surface has strong corrosion resistance , not easy to lose gloss, no fouling, easy to clean; good adaptability to decal printing paper, high mechanical strength, good thermal shock stability, after testing, the thermal shock stability reaches 180°C-20°C water heat exchange 5 pieces at a time It is especially suitable for use in tableware dishwashers; the content of lead, cadmium, zinc, barium, bismuth and other heavy metals in the enamel is zero, which completely solves the problem of poor acid and alkali resistance and heavy metals such as lead and cadmium in high-grade bone china .

Description

technical field [0001] The invention relates to a ceramic glaze, in particular to a high acid-resistance and alkali-resistance lead-free frit glaze for bone china used for producing high-quality lead-free bone china products. technical background [0002] Bone china is recognized as a high-grade porcelain in the world. For a long time, the frit glaze containing lead has been used in the production of bone china. This is because lead-containing glaze has the characteristics of easy melting, good fluidity, small thermal expansion coefficient, good thermal shock stability, and high mechanical strength. Heavy metal elements such as lead are fired through a certain process, which can make the surface of the ceramic bright and bright, with clear lines. However, ceramic products are inevitably corroded by acid and alkali in people's daily use process, resulting in the overflow of trace heavy metal elements such as lead. However, lead is extremely harmful to the human body. The na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/86
Inventor 张垠
Owner 张垠
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