Zinc oxide, also known as zinc white, usually white powder, odorless, light yellow are shown after calcination, the melting point of 1975 ℃. Zinc oxide is an important chemical flux of ceramic materials, ceramic tiles, particularly in construction and low-temperature enamel glaze material consumption more. Ceramic glaze in the art are also widely used.
role in the glaze and use of: zinc oxide in the glaze have a stronger role in flux, to reduce the glaze expansion coefficient, and increase thermal stability, and to increase the luster and white glazed, improve the glaze flexibility. While expanding the scope to increase the melting glaze of glory. However, in the presence of chromium in black glaze should not be used. Generally speaking zinc oxide used in the following areas.
1. For the production of cobalt-day shows that glaze: zinc oxide in the cobalt-day shows that glaze is very important flux, it allows the formation of cobalt oxide in the glaze in a beautiful blue.
2. Used as a crystallization agent: the art of enamel crystal glaze, zinc oxide is essential for the crystallization agent, rapid cooling in melting the glaze to form the crystal pattern for larger, very beautiful. In the crystalline glaze, the amount of zinc oxide up to 20 ~ 30%.
3. Used as emulsifying agent: Al2O3 high glaze containing zinc oxide added, the emulsion can improve the glaze of. Because zinc oxide to produce zinc and Al2O3 spinel ZnO • Al2O3 crystal. Zinc in the glaze, Al2O3 can improve the whiteness and opaque glazed degree. SiO2 can improve the luster glaze
4. As a ceramic pigment: Because of the role of strong flux, zinc oxide can be used as ceramic pigment flux, mineralization agents and carriers glaze
5. Used as a flux: zinc oxide at low temperature frit when used as a flux, the general amount of 5% to 10%, and in the low-temperature glaze raw material consumption is 5% of the ordinary.
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