slurries, prepared with each powder, then well squeezed.
The slurries (with approximately 70 wt% of solid load)
were prepared using the following procedure: the calcined
powders were dispersed in a 2 wt% of PVA solution.
Dolapix (Dolapix CE-64, Zschimmer–Scwarz, Lahnstein,
Germany) was used as dispersant to obtain an adequate
viscosity of slurries for the impregnation. Before the
sintering they were dried at room temperature for 24 h.