The effect of thermal and chemical treatment on the structural and phase composition of nanocarbon materials

Thermopower of Nanocarbon Materials with Different Structure and Phase Composition

“…It differs substantially from that for others specimens. As was shown in (Ovsienko et al, 2006) and stated above, specimen #3 contains only the ordered carbon phase with the interplanar distance of 0.336 nm similar to that in, e. g., fine crystalline graphite. For a more detailed analysis of the possible origins of thermopower in this sample further studies of the temperature dependence of its resistance were performed, the results of which are shown in Figure 4.…”

“…According to the reference data (Ovsienko et al, 2006), such structures could be considered as hetero-phase structures. Several conductivity mechanisms could be realized in these systems due to the presence of carbon phases with different levels of ordering (Hishiyama et al, 1978;Kaiser et al, 2001).…”

Segregated Conductive Polymer Composite with Fe3O4-Decorated Graphite Nanoparticles for Microwave Shielding

“…Therefore, the chemical modification of GNPs by Fe 3 O 4 not only reduces the percolation threshold significantly but also increases the value of electrical conductivity (see Figure 4 ). It is known that in the process of chemical modification, a significant delamination of GNP particles takes place [ 61 , 62 ], and as a result, there is a significant increase in the aspect ratio of GNPs. This leads to a decrease in the percolation limit and a decrease in electrical conductivity at the same concentration of fillers in the composite [ 63 , 64 ].…”

Magnetometric Studies of Catalyst Refuses in Nanocarbon Materials

“…A thorough analysis of the XRD data for the compositional variation of different carbon phases is presented in Ref. [ 20 ].…”