A low-temperature lead-free colored glaze

Abstract

The invention relates the technical field of ceramic glaze processing and discloses low temperature lead-free colored glaze. The low temperature lead-free colored glaze is prepared from silica, vanadium oxide, niobium pentoxide, boron oxide, lanthanum oxide, zirconium oxide, cerium oxide, mullite, apophyllite, table salt and a pigment. The low temperature lead-free colored glaze has a low baking temperature, saves energy, prevents lead dissolution, is safe and nontoxic, is environmentally friendly and reduces a production cost by about 11.3%. Through raw material ball milling, uniform mixing, multiple melting processes, quenching and ball mixing, the frit has no bubbles, fine enamel, a compact structure, stable performances and strong corrosion resistance. The pigment is added in melting so that the color is bright and pure, the gloss is uniform and smooth and color fading is avoided. Through use of a small amount of table salt, water grinding is convenient, use is convenient, fluidity is good, glazing is convenient, an expansion coefficient is matched and the glaze surface is flat and smooth.

Description

technical field [0001] The invention mainly relates to the technical field of ceramic glaze processing, in particular to a low-temperature lead-free colored glaze. Background technique [0002] Glaze is a kind of silicate. The glaze applied on ceramics is generally made of quartz, feldspar, and clay. After grinding and adding water, it is coated on the surface of the green body and melted by roasting at a certain temperature. The temperature drops When forming a thin glassy layer on the surface of ceramics, it can increase the mechanical strength, thermal stability, dielectric strength of the ceramics and prevent the erosion of liquids and gases. effect. [0003] However, at present, ceramic glazes are generally fired at high temperatures. The temperature is higher than 1250 ° C, and some are even above 1400 ° C. The energy cost of firing accounts for a large proportion of the production cost, accounting for 20-30% in foreign countries. my country accounts for more than 30%...

AI Technical Summary

Problems solved by technology

[0003] However, at present, ceramic glazes are generally fired at high temperatures. The temperature is higher than 1250 ° C, and some are even above 1400 ° C. The energy cost of firing accounts for a large proportion of the production cost, accounting for 20-30% in foreign countries. In my country, it accounts for more than 30%, and most of the ceramic glazes are filled with lead, which will cause great harm to the human body in the process of preparation and use. However, the preparation technology of low-temperature lead-free glaze is not yet mature.