H. R. Qian, X. D. Cheng, H. P. Zhang, R. F. Zhang and Y. H. Wang (2014) International Journal Of Applied Ceramic Technology 11 858-863.

Web link: http://dx.doi.org/10.1111/ijac.12204
Keywords: FABRICATION, COMPOSITES

Abstract: Porous mullite ceramics were fabricated from an industrial grade mullite powder by gelcasting process using fly ash cenospheres (FAC) as a pore-forming agent. The influence of content of FAC and sintering temperature on the density and strength was evaluated. The microstructure showed that FAC can act as a sintering aid and a pore-forming agent. When the sintering temperature at 1200 degrees C, porous mullite ceramics with a relatively high porosity (48.1-72.2%), low density (0.84-1.64 g/cm(3)), low thermal conductivity (0.16-0.22 W/m . K), and high compressive strength (6.21-14.70 MPa) have been obtained.