2.2. Freeze casting procedure
To produce tablets an experimental setup of the freeze casting
process was applied (see Fig. 1). This process includes four main
steps: (1) suspension preparation using mixing; (2) casting in the
preferred form mold; (3) solidification using freezing at low temperature
at ambient pressure; (4) solvent removing by sublimation
under reduced pressure (vacuum). The detail descriptions of the
freeze casting process were presented in the previous paper
(Nguyen and Ulrich, 2014).