Abstract
The aim of this work is to review our group’s studies and results on sintered porous membranes with graded structure for microfiltration by sedimentation and sintering of metallic and ceramic powders. The powders were sedimented into a sintering die in a sedimentation medium consisting of water and dispersant agent. After drying, the samples were sintered. The structures obtained were characterized by scanning electron microscopy and mercury porosimetry. The flow rate – pressure drop curves were experimentally determined and the viscous permeability coefficient was calculated using Darcy’s law. The absolute and the relative filtration fineness were also determined. A statistical study of the influencing parameters on the sintering degree shows that the particle size has the greatest effect on the sintering degree compared with sintering temperature and time. The possible applications for the studied membranes are: water microfiltration, environmental technologies, filtering lubricants and cleaning agents.
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