Control of the Properties of Glazes by the Aid of Eutectics

Published equilibrium eutectics and other low-temperature invariant points were investigated regarding deformation temperatures and rates. Their solubility in dilute acid, alkali, and phosphate solutions was also studied, and the one showing no solubility and the lowest deformation temperature was chosen as the center of the deformation series in each of the alkali-alumina-silica systems. The KAS, LAS, and NAS deformation eutectics were assembled in a triaxial system in which fusion temperatures and rates were determined, and the deformation eutectic was thus determined. Similar data were developed on combinations of the individual alkali eutectics and the lead-alumina-silica deformation eutectic reported in Part I of this study. The deformation eutectic of the combined alkali series and the lead-alumina-silica eutectic were combined in a series and the deformation eutectic was determined.