In order to fabricate solid porous PZT ceramics from
particle-stabilized wet foams, shaping, drying, and sintering
have to be accomplished. Gelcasting, first developed by
Omatete and Janney during the 1990s, has been applied not
only to the fabrication of dense ceramics, but also to porous
ceramics and complex-shaped ceramic parts [12–15]. The
gelcasting process involves a suspension of ceramic powders
in an aqueous monomer solution creating a 3D network by
in situ polymerization, which holds ceramic powders in the
shape of the mold cavity.