caa a22 4500 605490198 CHVBK 20210128100503.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1134/S1061933X15020039 doi (NATIONALLICENCE)springer-10.1134/S1061933X15020039 The effect of the mechanical activation dose on the defective structure of artificial graphite [Elektronische Daten] [A. Borunova, A. Streletskii, D. Permenov, A. Leonov] Energy parameters (dose D and the work of surface formation) have been determined for the formation of a defective structure as a result of mechanical activation of graphite. Graphite activation has been shown to be a two-stage process: at low doses (D ≤ 20 kJ/g), the disruption and shift of graphite particles are the main processes, which are accompanied by a reduction in particle size, formation of meso- and micropores, and a rise in the BET specific surface area to 450-550 m2/g predominantly due to the development of a slitlike mesoporosity. At the same time, the crystalline structure of graphite is transformed into a turbostrate one with a concomitant increase in the lattice parameter and a decrease in the sizes of coherentscattering regions. The shape of diffraction lines can be described under the assumption that several fractions with greatly different degrees of defectiveness coexist in graphite. At higher doses, turbostrate graphite is transformed into X-ray amorphous carbon with a concomitant decrease in the specific surface area and meso- and microporosity. The defects resulting from the mechanical activation cannot be completely annealed at 2800°C. The main parameter of mechanical activation is the dose of supplied energy D = J g t (J g is the specific power consumption, and t is the duration of the activation). The curves describing accumulation of different defects can be represented in the form of a unified dependence on the dose for the J g and, accordingly, t values varied by more than an order of magnitude (J g = 1.7-22 W/g). Pleiades Publishing, Ltd., 2015 Borunova A. Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, 119991, Moscow, Russia aut Streletskii A. Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, 119991, Moscow, Russia aut Permenov D. Central Research Institute of Chemistry and Mechanics, ul. Nagatinskaya 16a, 115487, Moscow, Russia aut Leonov A. Department of Chemistry, Moscow State University, 119992, Moscow, Russia aut Colloid Journal Pleiades Publishing 77/2(2015-03-01), 125-134 1061-933X 77:2<125 2015 77 10595 https://doi.org/10.1134/S1061933X15020039 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1134/S1061933X15020039 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Borunova A. Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Streletskii A. Semenov Institute of Chemical Physics, Russian Academy of Sciences, ul. Kosygina 4, 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Permenov D. Central Research Institute of Chemistry and Mechanics, ul. Nagatinskaya 16a, 115487, Moscow, Russia aut NATIONALLICENCE 700 1- Leonov A. Department of Chemistry, Moscow State University, 119992, Moscow, Russia aut NATIONALLICENCE 773 0- Colloid Journal Pleiades Publishing 77/2(2015-03-01), 125-134 1061-933X 77:2<125 2015 77 10595