The effect of the granule size on the structure of nanoporous ceramics made of organosilica polimer

The BET method was used to study the porosity in nanoporous ceramics prepared by pyrolysis at 600 ° C of an organosilicon polymer. The samples were pressed from fractionated granules obtained by single and double grinding in a planetary mill of the polymer hardened and heat-treated at 200 ° C. After an increase in the size of the granules over 250 µm at a single and 1000 µm at a double grinding, the specific surface area determined by the nanopores dropped sharply. An explanation of the results obtained is given from the standpoint of synergetics. Il. 4, bibliography: 10 titles.