Porous ceramic materials are of considerable interest for a variety of chemical and industrial applications in extremely harsh conditions, particularly at very high temperatures for long times. A modified gelcasting process employing agar as a natural gelling agent and polyethylene spheres as pore formers was exploited to produce porous ceramic bodies. Alumina and alumina-ZrO2 (AZ) powders were...

Zirconium silicate (zircon, ZrSiO4) is a ceramic material with excellent thermal properties, such as low conductivity and high shock resistance. In this work, dense zircon complex shaped parts were obtained by aqueous gelcasting through agar gelation. The colloidal stability study was performed zeta potential measurements function of pH polyacrylic-based deflocculant concentration (PAA). rheolo...