Open-pore sintered pieces were produced from waste glass powder, as raw material. The processing followed the filler principle, by making use of a salt (NaCl) mixed with glass powder, as soluble, non-sinterizable phase aiming at a control of porous size and porosity. Milling details and powder features are presented. The microstructure of the sintered and washed compacts was characterized using SEM and mercury porosimetry. The results showed that the final density depends strongly on the salt volume fraction. Salt dissolution generates pores with regular morphology predominating flat. Pressure-decay permeability analysis indicates the possibility of microfiltration operation in different ranges of porous size.
recycled glass; porous membranes processing; filler principle; microfiltration
