Gel casting is a direct foaming technique used to produce ceramic and polymeric scaffolds.
Gel casting was developed in Canada in the 1960s[1] and ever since it became an interesting manufacturing forming process for near-net-shape, very large, high-quality, complex ceramic parts with specified threshold strength.
[2] In this technique, the precursor materials typically consist of a monomer, cross linker, free radical initiator or catalysts are placed into an aqueous suspension.
The process then forms a gel type of mixture, which is then cast into a proper mould.
The next step, after the gel solidification, it is removed from the mould in a controlled manner and then being dried to form a green body.