Application of alumina fabricated through photosensitive binder jetting techniques in water filtration

Purpose Ceramic water filters are recognized for their robust chemical resistance and reusability when compared to other filter types. This study aims to investigate the utilization of the photosensitive binder jetting, a member of additive manufacturing techniques, for the fabrication of ceramic water filters. Design/methodology/approach In this study, alumina water filters with gyroid and perforated structures were fabricated using the photosensitive binder jetting technique. The internal structure, microstructure and porosity of the filter sample were characterized. The efficacy of the filters in removing suspended particles from water was investigated through the infiltration test and further illustrated using scanning electron microscopy. Findings A positive correlation between the particle removal efficiencies, which fell within the range of 12%–42%, and the corresponding surface areas, which ranged from 125.76 cm2 to 164.79 cm2, was reported. The efficacy of the filter in removing particles from water within the size range of 5–75 µm, particularly its highly efficient removal of particles within the specific size range of 5–30 µm, was demonstrated. Originality/value The microstructure of alumina, as processed in this study, indicates its potential for water filtration applications. The utilization of additive manufacturing techniques to fabricate ceramic water filters enhances their efficiency by facilitating the adjustment of the filter’s structure, which in turn enables high surface area to volume ratios.