THE EFFECT OF DIFFERENT CHEMICAL FORMULAS ON THE FIRING TEMPERATURE OF R2O-RO-ZNO-R2O3-SIO2-BASED CRYSTALLINE GLAZE
Keywords:
Willemite, ceramic, firing temperature, glazeAbstract
Ceramic products with a crystalline glaze are attractive ceramic crafts. Willemite (Zn2SiO4) crystalline glaze is the most widely known due to it having crystals large enough to see with the naked eye. However, this crystalline glaze system requires a high firing temperature and the firing curve design is complicated. The present study studied the development of a glaze formula to reduce the firing temperature. Samples were fired at different firing temperatures, ranging between 1,200-1,290oC. X-ray diffraction and energy dispersive X-ray spectrometer analysis of the crystal phases after being fired at all temperatures confirmed the willemite crystals. Crystalline glaze formula 2 is a successful crystal phase at 1,250oC and the crystals can be observed with the naked eye. Therefore, crystalline glaze formula 2 is a candidate for reducing the firing temperature in crystalline glaze production.
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