Calcined Zinc Oxide: a Key Raw Material in Ceramic Glazes
Publish Time: 2025-02-05
In the ceramic industry, zinc oxide is an important chemical raw material, and its performance and chemical composition have a significant impact on the physical properties of ceramic glaze. In order to improve the performance of primary zinc oxide (such as direct zinc oxide and indirect zinc oxide) extracted from zinc vapor in ceramic glaze, heavy calcined zinc oxide was obtained by high temperature treatment and calcination. This specially treated zinc oxide not only has high density, but also exhibits excellent fluidity and a series of characteristics that are beneficial to the performance of ceramic glazes.
The calcined zinc oxide has high density and good fluidity, the shrinkage rate of the glaze made of the calcined zinc oxide is low, and the glaze surface is not easy to generate pinholes and cracks. These characteristics make calcined zinc oxide widely used in ceramic glaze. In addition to the high density, the product quality standards of calcined zinc oxide are comparable to those of high-quality zinc oxide, which further proves its excellent quality. Zinc oxide calcined at high temperature is light yellow and its melting point is as high as 1975 ℃, which provides a solid foundation for its stable application in ceramic glaze.
In the ceramic chemical flux, calcined zinc oxide plays an important role. In particular, calcined zinc oxide is widely used in building ceramic wall and floor tile glazes, low-temperature ceramic glazes and ceramic pigments. At the same time, it has also been widely used in the glaze of artistic ceramics. In the glaze, the calcined zinc oxide shows a strong dynamic melting effect, which can reduce the expansion coefficient of the glaze and improve the thermal stability of the product. At the same time, it can also increase the gloss and whiteness of the glaze and enhance the elasticity of the glaze.
Calcining zinc oxide can not only improve the brightness of the glaze, but also broaden the melting range of the glaze. This means that during the preparation of ceramic glaze, the composition and process parameters of the glaze can be adjusted more flexibly to meet the needs of different ceramic products. In addition, the addition of calcined zinc oxide can also make the glaze more uniform in the melting process, reduce the generation of glaze defects, and thus improve the overall quality of ceramic products.
To sum up, calcined zinc oxide plays an irreplaceable role in ceramic glaze because of its unique physical properties and chemical composition. It can not only improve the performance and quality of ceramic products, but also provide strong support for the sustainable development of ceramic industry. With the continuous development of ceramic industry, the application prospect of calcined zinc oxide will be broader, which will inject new vitality into the innovation and upgrading of ceramic products.
