DIFFUSION PROCESSES IN FIRING WILLEMITE GLAZE ON QUARTZ GLASS CERAMICS

摘要

Diffusion processes occurring at the boundary between willemite glass-ceramic glaze and quartz glass ceramics are considered. Formation of a transitional contact zone between glaze and quartz glass ceramics is experimentally established, which ensures the formation of a strong bond of the coating to the substrate. The extent of the contact zone and the concentration distribution of components in this zone are determined using the method of layer-by-layer pickling and x-ray-fluorescent analysis. Coefficients of mutual diffusion of potassium and silicon ions are calculated for the glaze firing conditions.