Tape casting of aqueous Al2O3 slurries

The well-dispersed aqueous Al2O3 slurries suitable for tape casting were prepared, the effects of the concentration of dispersant, of the pH value, of solid content etc. on the properties of slurries were investigated, and the results indicated that the rheological of slurries was effected greatly by pH value and organic additives. After cutting, laminating and binder removal, the laminated Al2O3 green bodies were sintered by hot-press in a vacuum furnace. SEM micrographs showed that the microstructure of the aqueous green-body and samples were different from that of non-aqueous, and the mechanical properties of aqueous Al2O3 samples were much high than that of non-aqueous Al2O3.