Low-temperature glaze leadless cadmium-free ceramic pigment flux

Abstract

The invention relates to a lead-and-cadmium-free ceramic pigment flux of low temperature, which is used to produce ceramic pigment for decorative ceramics. The ingredient weight percentages are: 20-40% SiO2, 3-15%SrCO3, 10-30% B2O3, 1-5% Al2O3, 1-5% Na2O, 1-5% K2O, 1-8% Li2CO3, 2-10% ZnO, 1-5% ZrO2, 1-5% SnO2, 0-5% TiO2, 0-5% Ba2CO3, 0-5% CaCO3, 0-5% MgCO3, 1-5% CeO2 and 1-5% Y2O3. The pigment flux of the invention is lead-free, cadmium free, non-toxic, safe and reliable, good in chemical stability and color adaptability, pure in color, colorful, high in gloss and good in quality, low in application temperature, less energy consumption and low in production cost. The flux and pigment are suitable for the traditional crafts methods of screen printing, lithography, spraying, hand-painting and repairing and can be applied in the decoration of a plurality of ceramic products such as hard porcelain, soft porcelain, fine pottery, bone china and vitrified ceramics, particularly suitable for lead-free glazed ceramic decoration.

Description

technical field [0001] The invention relates to an improved lead-free and cadmium-free ceramic pigment flux on low-temperature glaze, which is made into ceramic pigment for ceramic decoration. Background technique [0002] The most widely used decorative method for ceramic products is overglaze coloring. Usually, overglaze coloring is used at a relatively low temperature of 750-850°C. Therefore, in the traditional production process, 30-50% lead oxide should be added to the pigment flux. In order to make the firing temperature range of ceramic glaze pigments wide and pure. For example, the addition of selenium and cadmium colorants has become an indispensable color system in the field of ceramic product decoration with unique and gorgeous colors such as bright red, orange red, and lemon yellow. The pollution of water resources and the harm to the human body have attracted worldwide attention, especially the dissolution of lead and cadmium on the surface of tableware and dri...

AI Technical Summary

Problems solved by technology

[0006] ①Chemical stability becomes poor:

[0007] Bi 2 o 3 The introduction of glass will easily lead to phase separation of glass, and it is difficult to form a uniform glass body, resulting in loose flux structure, thus affecting chemical stability

The performance of acid and alkali corrosion resistance will also decrease

[0008] ② Bi 2 o 3 The addition of the colorant will lead to impure color

[0009] ③The thermal expansion coefficient is too high, resulting in a mismatch with the expansion coefficient of the ceramic glaze, which is likely to cause defects such as "exploding porcelain"

[0010] ④ Bi 2 o 3 Higher prices lead to an increase in product costs and affect market competitiveness

[0011] Moreover, the adaptability of the flux in the existing lead-free and cadmium-free ceramic pigments on glaze is poor. In general, different colorants need to be equipped with different fluxes. There are many types of fluxes, which brings great inconvenience to production.

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