The adaptability of green glaze refers to the glaze melt with good melting performance. After cooling, it is combined with the green body to form a perfect whole, and the glaze will not crack and peel off. The factors affecting the adaptability of glaze are: the difference of expansion coefficient of glaze, the middle layer, the elasticity and tensile strength of glaze, and the thickness of glaze layer. So, what are the factors affecting the adaptability of green glaze?
(1) Thermal expansion coefficient of blank and glaze: when the thermal expansion coefficient of blank is greater than that of glaze, the glaze will be subjected to compressive stress and the glaze will peel off; When the thermal expansion coefficient of the green body is less than that of the glaze, the glaze will be subjected to tensile stress, resulting in cracks on the glaze; When the coefficient of thermal expansion of the glaze is slightly less than that of the blank, the compressive stress in the glaze is very small, and the bonding performance of the blank glaze is the most appropriate.
(2) Chemical composition of green glaze: when the chemical composition of green glaze is similar, the combination of green glaze is firm; When there is a big difference between the chemical composition of green body and glaze, the glaze is easy to peel off.
(3) The elastic modulus of glaze should be similar.
(4) The glaze thickness should be appropriate.
(5) The firing temperature of the green glaze should be appropriate.