CHARACTERIZATION OF THE INTERACTION BETWEEN GLAZES AND CERAMIC BODIES

The paper presents the study of stress relations of ceramic body -glaze systems of model and real, both historical and contemporary ceramics. The samples were characterized in terms of chemical composition, linear thermal expansion coefficient and degradation effects. Calculations of stress relations between the body and glaze were firstly performed on model samples. Compresive or tensile stresses were created in the surface layers of model systems using various model glazes. The same procedure for calculating stress states was subsequently applied to historical and contemporary ceramic products exhibiting different types of damage. The possibilities of using TMA measurement and CTE calculations using additive quotients has been verified. Calculated results provide relevant information about the accordance of the glaze-ceramic body and for the characterization of surface defects.