CaO, K2O 및 SiO2 조성 변화에 관한 투명유약 연구

Abstract

A glaze is a glass-like substance blended on to the surface of pottery to form a hard decorative coating. The main component of a glaze is silica, which is a dioxide of silicon with the chemical compound SiO2. When heated under the appropriate temperature, the glaze fuzes on the pottery creating a vitreous coating on the pottery. Glazed pottery tend to be more firm and less absorbent compared to others thus making it easier to use, and it is hygienic due to its high resistance to alkali and acidic materials. In addition, the glaze produces a beautiful color, and creates a smooth surface making it easier to wash. Basic glaze that gives birth to glaze is very important. The purpose of this study is make a stable basic glaze by altering the dosage of CaO, K₂O and SiO₂, as well as altering the firing temperature to control the glaze clarity, melting, cracking, and mechanical properties. As an experimental method, one has researched one’s own basic glaze and chemical composition. After plasticity, the dosage of CaO, K₂O, and SiO₂ were individually altered, and each fired at different temperatures. In order to observe the surface condition of the glaze, research was made on its gradient, coefficient of thermal expansion, elasticity, tensilestrength, surfacetension, andthelike. Inconclusion, the addition of CaO, K₂O, and SiO₂ to the basic glaze controlled its clarity and cracking. Furthermore, a stable basic glaze evolved through the experimenting of gradient, coefficient of thermal expansion, elasticity, tensile strength, and surface tension and it made possible to apply it to the table-ware and vessel by the increase of duration and the smoothness of glaze surface.