Abstract
Activated carbon was treated at 5.0 GPa up to 1600 °C, and the electrical property evolution in the graphitization process was investigated. The change of structure results in the corresponding electrical property transition. For the samples at low high-pressure sintering temperature, the variable-range hopping is the main electrical transportation mechanism. The graphitized activated carbon is a semimetal while the high-pressure sintering temperature is lower than 1300 °C and behaves non-Fermi-liquid property at higher sintering temperature. The ratio of resistivity at ∼5.0 and ∼300.0 K versus high-pressure sintering temperature is drastically decreasing near the graphitization temperature, which indicates that the insulator-metal transition occurs in the sintering temperature range of 900-1000 °C.
| Original language | English |
|---|---|
| Pages (from-to) | 1947-1950 |
| Number of pages | 4 |
| Journal | Solid State Sciences |
| Volume | 10 |
| Issue number | 12 |
| DOIs | |
| State | Published - Dec 2008 |
| Externally published | Yes |
Keywords
- Activated carbon
- Electrical properties
- Graphitization
- High pressure
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