Thermal behaviour of glazed ceramic bodies

Thermal behaviour of glazed ceramic bodies was studied using three different thermal analysis techniques, dilatometry, thermomechanical analysis and differential thermal analysis. The data of relative expansions obtained through these analyses were used to calculate stress relations within two-component systems consisting of the glaze and ceramic body. The investigation also aimed to determine the long-term stability of glazed ceramic products and identify defect growth or degradation due to corrosive effects of the surrounding environment. The results of thermal analysis measurements showed that the values of thermal expansion coefficient, glass transition temperature Tg, set point Tn and deformation temperature Td increase slightly with growing heating rates. However, the measurements showed that heating rate does not affect stress relations within glaze–ceramic body systems.