Zirconium silicate coated ceramic pigment and method for making same

Abstract

The invention provides a zirconium silicate enwrapped ceramic pigment which comprises a color body and also comprises a shell body of metal oxide which is compounded by the zirconium silicate, and the shell body enwraps the color body compactly and completely. The invention also provides a preparation method of the zirconium silicate enwrapped ceramic pigment. Because accelerant is introduced into the preparation process, the method has the advantages that the loss of the color body is little; the enwrapping layer of the pigment is compact; the enwrapping rate is high; no thermal treatment of high temperature is required during the preparation process etc.

Description

technical field [0001] The invention relates to a ceramic pigment, in particular to a zirconium silicate wrapped ceramic pigment and a preparation method thereof Background technique [0002] Since the firing temperature of ceramic products is relatively high (generally 1000-1300°C), the pigments applied to ceramic products not only have strong color development ability and pure color tone, but also have better thermal stability within the firing temperature range. , can withstand the erosion of glass melt. [0003] Many inorganic compounds in nature have bright color and color rendering ability, which are called chromophores, such as cadmium sulfur selenide (red), cadmium sulfide (rhubarb) and carbon black. However, these inorganic pigments have poor high-temperature stability, and are generally completely oxidized and decomposed above 800°C. Therefore, the applications of these inorganic compounds are greatly limited. [0004] In order to improve the high-temperature st...

AI Technical Summary

Problems solved by technology

The commonly used method of preparing encased ceramic pigments is to co-precipitate the chromophore with the precursor of the encapsulation layer and the mineralizer to form a reaction precursor, and then seal it or fire it at a high temperature under a protective atmosphere. The defect of this preparation method is The reason is that the chromophore is easy to sublime or be decomposed and oxidized during the heat treatment process, resulting in a large loss, and it is difficult to make a new breakthrough in the encapsulation rate

It is also suggested that the encapsulation precursor is prepared by a common method, and then the encapsulation layer is densified by hydrothermal treatment. The advantage lies in the low temperature treatment, and the color body is almost not lost. However, this simple conversion to hydrothermal treatment process is difficult to succeed. The package or package rate is extremely low and cannot reach the level of industrialization