Abstract:Morphology, composition and elemental distribution, and pore size and porosity of microporous ceramic tube membrane prepared by extrusion forming were investigated by SEM, EDS, mercury intrusion porosimetry (MIP) and optical contact angle measuring instrument. According to results of microstructure measurement, permeability of ceramic tube membrane was calculated by combination of number with shape method. Composition of driving force during permeation of deionized water on microporous ceramic tube and tortuosity were analyzed by comparison of theoretical and experimental results. The results indicate that microporous ceramic tube has homogeneous porosity and narrow pore size distribution. The most probable pore size is 38~39 μm and porosity is about 42%. Driving force of droplet penetration process is provided by droplet gravity and capillary force, and the relationship between volume change and time is V=-7.9525 t+14.142. Ceramic membrane permeability and tortuosity is 5.79 μm2 and 1.90 respectively.