[en] Most of the EPR investigations of fullerenes are related to their anionic forms with regard for superconducting properties. But we focus our interest on EPR measurements of fullerenes cations. The ways of formation of fullerene cationic forms are based on strong oxidation process. We used two of the oxidation media: oleum and ozone. In both cases we observed resonance lines with typical values of g-factor (2.0023 < g < 2.0030). In this paper we present the results obtained by Scharff and our group.

[en] Low temperature carbon films, i.e. Prepared below — 1600°C, are currently used as interphases in advanced composites. Understanding their formation mechanisms is a due for controlling the preparation conditions/structure-texture relationships, and then optimising the mechanical behaviour of composites.

[en] The kinetics of graphitization of soft carbon has often been studied by fitting isothermal annealing data, e.g., the time-temperature changes in the apparent interlayer spacing.

[en] Preparation of an antibacterial phenolic resin-based activated carbon fiber containing mesopores was attempted using cobalt as an activation catalyst and silver as an antibacterial agent. The cobalt acts to form mesopores effectively. However, cobalt is strongly suppressed by silver to alloy with it and forming larger catalyst particles. In this presentation, isotropic pitch-based activated carbon fibers containing different concentrations of silver were prepared and characterized to investigate the structural and mechanical property changes.

[en] Bundles of single-wall carbon nanotubes (SWNTs) synthesized by the arc-discharge process were heat-treated between 1600°C and 2800°C Their evolution was followed by HRTEM, X-ray diffraction and Raman spectroscopy.

[en] Large quantity of wastes which are coarse-fragmental mixture of argillites, alevrolites, sandstones, carbonate- and pyrite containing rocks with coal components are formed at coal enrichment in Ukraine. Besides the finely divided flotation wastes and slurries with particles size less than 3 mm are formed which contain to 50 % and higher of organic mass. The goal of research was to study the power value of coal enrichment wastes.

[en] For twenty years SEP has developed carbon fibrous structures. The technology is based on the needling process of oxidized PAN textile fabrics. The textile preform is carbonized at the suitable temperature according to the mechanical properties and purity of the carbon fibres required by the use of the resulting carbon-carbon composite. It is the Novoltex concept.

[en] It has often been suspected that the presence of mineral matter can affect the structure and ordering of carbons. Mineral matter can also affect reactivity via such mechanisms as “blocking” of active sites and reducing carbon surface density. Here we report on the effects of coal-derived ash on carbon ordering and reactivity.

[en] Two types of model based on homogeneous Fickian diffusion have been proposed to describe the movement of sorbate molecules within an adsorbent particle, namely, pore diffusion in the fluid phase and solid (or surface) diffusion. The choice of intraparticle diffusion mechanism is a difficult one. The two models are only the extremes of the molecular transport processes that may occur in an adsorbent particle. Several simplified rate equations have been developed to approximate solid diffusion in adsorbent particles.

[en] In a previous paper the anodic reaction on graphite and pyrolytic graphite in alumina saturated cryolite melts was investigated. The reaction mechanism was interpreted as a two step two electron charge transfer reaction with an adsorbed intermediate.