Ceramic glaze and preparation process thereof

Abstract

The invention discloses ceramic glaze, belonging to the technical field of ceramic materials and comprising basic glaze and coloring pigments, wherein the basic glaze comprises the following components by weight percent (wt%): 45% to 60% of SiO2, 7% to 12% of Al2O3, 5% to 12% of CaO, 0% to 5% of MgO, 0% to 5% of P2O5, 0.5% to 5% of SrO, 2% to 8% of ZnO, 1% to 7% of K2O, 1% to 5% of Na2O, 0.5% to 5% of Li2O, 1% to 8% of B2O3 and 0% to 4% of ZrO2. By separating the coloring pigments in colored glaze from the basic glaze and baking the coloring pigments at different temperatures for twice, the invention solves the problems that the product of colored ceramic glaze has poor color difference and color development and leads to pollution caused by heavy metals, such as lead, cadmium and the like, and the problem that the colored pigments or metal oxides are dependent on the basic glaze at the same time; and the invention lessens the difficulty in producing the colored ceramic glaze.

Description

technical field [0001] The invention belongs to the technical field of ceramic glazes, in particular to a ceramic color glaze and a process for preparing the color glaze. Background technique [0002] The production process of the traditional ceramic color glaze in the daily-use ceramic industry is: adding ceramic coloring pigments or metal oxides to the base glaze in a certain proportion, and ball milling and mixing together to make a color glaze, and then adopting dipping or spraying glaze. The method is to fix the color glaze on the ceramic body to form a 0.1-0.3mm color glaze layer, and finally fire the product with the color glaze according to the required firing temperature and firing system to obtain a colored glaze. Colorful ceramics. But, according to this ceramic color glaze production process method, there are many weak points in the product produced: the brilliance degree of the color rendering of color is more dependent on the basic glaze, and the chemical comp...

AI Technical Summary

Problems solved by technology

But, according to this ceramic color glaze production process method, there are many weak points in the product produced: the brilliance degree of the color rendering of color is more dependent on the basic glaze, and the chemical composition of the basic glaze has a great influence on the color development of the pigment. Considerable influence, so different coloring pigments are required to have different basic glazes to match them, so as to achieve the best color development effect, so it is more technically difficult to ensure that each color achieves the best color development effect Large, and the process is more complicated; the color difference is easy to occur at the corners of ceramic products, especially the color difference of special-shaped and large-scale products is particularly obvious, because the ceramic glaze is in a glass rheological state at high temperature, and under the action of gravity. The surface of the product moves downward, and the coloring pigment is mixed in the glaze. It will move along with the glaze layer, and finally the place where the glaze layer is thick has a darker color, and the place where the glaze layer is thinner has a lighter color, causing the overall color of the product to be uneven and form a color difference. The more times such products are refired, the more obvious the color difference will be; the color glaze products with high heavy metal content such as lead and cadmium are easy to segregate and cause harm to the human body

When there is a large color difference in ceramic color glaze products, many technicians currently use color lines or gold edges on the corners of the product to make up for it, but there is no fundamental solution to the problem of color difference in ceramic color glaze products, which is not only costly , and not pretty

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