Covering layer without lead, cadmium of pigment without lead on ceramic glaze, and preparation method

A production method and technology for ceramic glaze, applied in the fields of pigments and ceramics, can solve the problems of poor color adaptability of pigments, poor chemical stability, large thermal expansion coefficient, etc., and achieve the production method that is simple and easy to operate, easy to master, and low in baking temperature. Effect

Inactive Publication Date: 2010-05-19
淄博华为颜料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] a. Poor chemical stability and poor gloss
[0005] b. Poor adaptability to pigment colors will affect the color rendering of gold red, iron red, selenium red and other colors that are easy to fade, resulting in large color difference and distortion of the original picture
[0006] C. The coefficient of thermal expansion is large, which can easily cause cracks in the picture or burst porcelain

Method used

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  • Covering layer without lead, cadmium of pigment without lead on ceramic glaze, and preparation method

Examples

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with embodiment.

[0037] See Table 1 for the ingredients, weight percent composition and main production process parameters of Examples 1-8 of the lead-free pigment on ceramic glaze of the present invention.

[0038] With the same color and the template of the same picture decorated with lead-free pigments on the ceramic glaze, the lead-free and cadmium-free cover layer processed and decorated with the embodiment 1~embodiment 8 shown in table 1 respectively and no lead-free and cadmium-free For the cover layer sample, the dissolution amount of lead and cadmium mg / dm is measured according to the method of ZBY24006-89 2 See Table 2 for comparison.

[0039] Decorate with the lead-free pigment on the ceramic glaze and process and decorate the same color and the model plate of the same picture with the lead-free and cadmium-free cover layer that the embodiment 1~embodiment 8 shown in table 1 is made, cont...

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Abstract

This invention relates to a lead- and cadmium-free cover for lead-free overglaze pigment. The lead- and cadmium-free cover comprises: major components 80.0-95.0 wt.%, viscosity regulator 3.0-7 wt.%, stabilizer 1.0-7.0 wt.%, and coloring aid 1.0-8.0 wt.%. The major components are SiO2, Na2O and B2O3. The viscosity regulator is Al2O3. The stabilizer is one or more of ZrO2, SnO2 and La2O3. The coloring aid is one, two or three of MgO, CaO, ZnO, SrO and BaO. The lead- and cadmium-free cover can maintain the high performance of lead-free overglaze pigment, and can also reduce the stripping amount of lead and cadmium of the lead-free overglaze pigment, thus maintaining the original color of the lead-free overglaze pigment and preventing the pattern from cracking. The lead- and cadmium-free coveris colorless, and has such advantages as high adhesiveness, high adaptability and easy production.

Description

technical field [0001] The invention relates to a lead-free and cadmium-free overcoat layer of lead-free pigment on ceramic glaze and a manufacturing method thereof, belonging to the technical field of ceramics and pigments. Background technique [0002] The flux used in the ceramic industry basically contains lead oxide, because lead oxide can make the flux easy to melt and has a wide melting temperature range, can improve the refractive index and elasticity of the glass, and can make the color of the pigment more abundant. It can also slow down the dissociation of alkali metal ions in the glass, and has a thermal expansion coefficient suitable for most enamel. Therefore, from ancient times to the present, lead oxide is mostly used in lead-free pigments on ceramic enamel. However, lead compounds, other metal oxides and cadmium compounds in lead-free pigments on ceramic glazes are toxic, especially tableware, wine sets, tea sets, etc. decorated with glaze pigments. When usin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C8/20C03C8/04C04B41/86
CPCC03C3/093C03C3/095C03C8/00
Inventor 徐博钱鹏
Owner 淄博华为颜料有限公司
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