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The porous cordierite-mullite ceramics were prepared by the pore-forming  in-situ technique. The characterizations of porous cordierite-mullite  ceramics were determined by an X-ray diffractometer (XRD), a scanning  electron microscopy (SEM), and a microscopy measured method, etc., and the  effect of particle size on phase composition, pore characterization and  strength were investigated. It’s found that particle size affects strongly  the formations of cordierite and mullite, and then changes the pore  characterization and strength. With the decrease of the particle size, the  sintering temperature at which the formations of cordierite and mullite take  place extremely fast decreases, the pore size distribution becomes from  bi-peak mode to mono-peak mode, the porosity and the median pore size  decrease but strength increases. The most opposite mode is the specimen  sintered at 1400 ºC from the grinded powder with an average particle size of  10.2 μm, which consists of cordierite, mullite and minor spinel, and has a  high apparent porosity (40 %), a high compressive strength (58.4 MPa), a  small median pore size (6.3 μm) and well-developed necks between particles

Effect of particle size on the pore characterization and strength of porous cordierite-mullite ceramics prepared by a pore-forming in-situ technique