Abstract
The method of obtaining a porous material with a layered structure is considered. This method makes it possible to create a finely porous layer on a highly porous base. The method was used to obtain a material based on titanium carbide powders. In the structure of flat samples of such material there were areas with different characteristics of porosity, such as volume and pore size. Creating a layered (or gradient) structure allows to increase the efficiency of membrane filters based on such material. The characteristics of the porous structure are determined. Filters based on titanium carbide powders were synthesized, the isotropic porous structure of which has the following characteristics: filtration fineness is about 460 nm with a total porosity of 39%, gas permeability of 3.3·10−19 kg/(m2·Pa·s) at a pressure drop of 0.05 MPa. Filters with a gradient structure had a filtration fineness of 320 nm and a gas permeability of 2.4·10−19 kg/(m2·Pa·s) at a pressure drop of 0.05 MPa.
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