Preparation of porous ceramics by gelcasting approach

Abstract Gelcasting has been developed as a novel ceramic forming method for complex-shaped advanced materials of near-net-shape. In this work, the gelcasting process has been further developed to fabricate porous single- and multi-component ceramics. Porous multi-component ceramics were obtained from gelcast body of precursors by a reaction-sintering process. Large α-Al 2 O 3 powders with a d 50 value of 21.12 μm and mixed precursors were used to prepare porous α-Al 2 O 3 and La 0.6 Sr 0.4 Co 0.8 Fe 0.2 O 3− δ ceramics, respectively. The experimental results presented here demonstrate the utility of the gelcasting process for fabricating practically useful porous ceramics.