Zinc oxide is an important ceramic chemical flux raw material, which has a strong melting aid effect in the glaze. It can reduce the expansion coefficient of the glaze, improve the thermal stability of the product, and at the same time, increase the gloss of the glaze surface and improve the elasticity of the glaze. Expanding the melting range can increase the luster of the glaze color. Mainly used in the following aspects:
1、 Used as a flux. When zinc oxide is used as a flux in low-temperature frit glaze, the general dosage is between 5% and 10%, and the dosage in low-temperature raw glaze is usually around 5%.
2、 Used as an emulsifying agent. Adding zinc oxide to glaze with high alumina content can improve the opacity of the glaze surface. Because zinc oxide can form zinc spinel ZnOA12O3 crystals with A12O3. In zinc containing opaque glaze, A12O3 can improve the whiteness and opacity of the glaze surface. SiO2 can improve the gloss of the glaze.
3、 Used as a crystallization agent. In artistic glazes, zinc oxide is an indispensable crystallization agent. When the fused glaze is rapidly cooled, it forms larger crystal patterns, which are very beautiful. The amount of zinc oxide used in crystalline glaze can reach 20-30%.
4、 Used to make cobalt sky blue glaze. Zinc oxide is a very important flux in cobalt sky blue glaze, which can make cobalt oxide form a beautiful sky blue in the glaze.
5、 Used as a ceramic pigment: Due to its strong flux effect, zinc oxide can be used as a flux, mineralizer, and glaze carrier for ceramic pigments.
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