Obtaining of ceramic porous alumina membranes

The object of research is a porous alumina material for membranes, obtained by direct chemical deposition in an aqueous solution with various pore-forming additives. The synthesis of AhO3 powder was carried out by the method of direct chemical precipitation in an aqueous solution with various additives (citrate method) with the addition of organic stabilizers of different molecular weights. The phase analysis of the obtained samples was carried out by X-ray phase analysis, thermal analysis by TG / DSC methods, and the study of sintering processes using dilatometry. The resulting powders were pressed and sintered, and the porous structure was investigated by mercury porosimetry, the surface morphology was studied by atomic force microscopy. As a result of the study, micro- and nano-sized alumina powders were obtained. By pressing and sintering the powders, membranes with a total porosity of up to 52% and a hardness sufficient for their use in the microfiltration process were obtained.

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