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Highly oriented pyrolytic graphite (HOPG) targets were irradiated by use of an ultra-short pulsed (pico to femtosecond) Ti:Sapphire laser operating at 825-nm wavelength. The morphology and quality of laser ablated surfaces were characterized by stylus profilometry, scanning electron microscopy...
The reaction of O 3 with activated carbon has been investigated with transmission FTIR spectroscopy. A wide range of carbonyl species are observed to form with stretching mode frequencies ranging up to 1900 cm −1 , but individual carbonyl species cannot be resolved. A υ (C–O) mode is...
Reactivity upon immersion in an oxygen plasma is studied in this paper on 46 different carbons and coals. Suitable parameters are chosen to characterize the plasma reactivity of these materials. The observed plasma reactivity trend is compared with the O 2 reactivity trend shown by the same set...
Single wall carbon nanotube (SWNT) materials subjected to various chemical treatments including regular, published, acidic purification treatments, were investigated by high resolution transmission electron microscopy and X-ray diffraction. Results show that acid purification cannot avoid SWNT...
A modification of the Dubinin–Radushkevich pore filling model by incorporation of the repulsive contribution to the pore potential, and of bulk non-ideality, is proposed in this paper for characterization of activated carbon using liquid phase adsorption. For this purpose experiments have been...
This review provides a comparison of submicron-diameter carbon filaments and conventional carbon fibers as fillers in composite materials. Carbon filaments (0.1 μm diameter, catalytically grown) are superior to conventional carbon fibers (discontinuous) as a filler in providing polymer–matrix...
A borosilicate glass which consisted of 40–45 mol.% B 2 O 3 and 55–60 mol.% SiO 2 was used as a sealant for the C/SiC composites with and without a Si–Zr coating, and the oxidation behavior of the C/SiC composites in air was investigated. The glass increased greatly the oxidation resistance...
Petroleum and coal tar pitches have been treated thermally at 400°C and 470°C, extracted with toluene and subsequently activated with CO 2 at 900°C. With one exception, the development of the micropore widths and volumes in the resulting carbons follows the trend observed for carbons based...
PAN-based carbon fibers impregnated with phenolic resin used as a precursor of carbonized matrix were modified by addition of molybdenum disilicide (MoSi 2 ) in different concentrations i.e., 0, 4, 12 and 20% by weight for improving anti-oxidation properties of the composites. In this work, the...
The electrical conductivity of thermal and conductive carbon blacks with different chemistry was determined by impedance spectroscopy. Thermal blacks are suitable compounds for studying the influence of the chemistry on the conductivity since they have similar structures and surface areas, which...
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