METHOD OF OBTAINING OPEN-PORE MATERIAL BASED ON GLASSY CARBON

摘要

FIELD: chemistry.SUBSTANCE: liquid phenolformaldehyde resin is mixed with powder of oxalic acid of various fractional composition (as pore former) until homogeneous plastic mass is obtained, workpieces are formed by vibration impact and hardened, thermal processing in static atmosphere in the interval of temperatures from 210 to 250°C and pyrolytic carbonisation in protective medium are carried out. Workpiece hardening is realised at temperature 60-80°C for 20-60 minutes. Before carbonisation it is possible to introduce precursors of metals from iron group into obtained porous workpiece by method of impregnation. Pore-former is removed from workpiece by method of extraction. Method is technologically simple and economically profitable.EFFECT: reduction of density and increase of strength with simultaneous preservation of specific adsorption surface of obtained material.4 cl, 2 dwg, 1 tbl