Study on the Dispersion of Graphite as Pore Former

摘要

Graphite powders are important pore former,and widely used in the preparation of many kinds of porous ceramics.The dispersion of pore former controls the homogenous pore structure of porous ceramics,and deeply influences its properties.The dispersion and its influence factors of graphite powders in water and alcohol were systematically studied.The dispersion of graphite powders in water and alcohol were investigated by sedimentation method.It was found that alcohol as dispersion media can improve the dispersibility of graphite powders.In addition,the influence of different surfactants on the disperisibility was also studies.It can be confirmed that surfactant can prompt the dispersion of graphite powders in water.The zeta potential and particle size of graphite powders in different pH value were tested to understand its dispersion.