Aqueous ceramic suspensions were prepared from a parent glass powder belonging to the LZSA (LiO2-ZrO2-SiO2-AlO2) glass-ceramic system. The processing conditions were established by the physical and chemical characteristics of the parent glass powder and by the rheological study of the formulated suspensions. Knowing the characteristics of the glass powder, such as the particle size, the solid content was varied on the suspensions. The solid content was varied from 30 to 40 vol.% and the additives added were ammonium polyacrylate as dispersant (PAA) and polyvinyl alcohol (PVA) as binder from 1.0 to 3.0% and 0.1-0.5% (based on solid weight in the suspension), respectively. Considering the influence of the additives on the rheological behavior as well as the desired characteristics for ceramic green bodies (high density) the suspensions were processed by slip casting. The results showed that suspensions processed with 40% solids, 2% PAA, 0.3% PVA, provided the best conditions for slip casting of LZSA glass powders.
glass-ceramics; rheology; slip casting
