| Autor: |
Mohamed Saidi, H. Oubouchou, S. Berdous, N. Saidi-Amroun, M. Bendaoud |
| Rok vydání: |
2007 |
| Předmět: |
|
| Zdroj: |
2007 IEEE International Conference on Solid Dielectrics. |
| DOI: |
10.1109/icsd.2007.4290856 |
| Popis: |
Electrical charging current in Poly(ethylene naphthalene-2,6-dicarboxylate) was investigated in a wide temperature range around the glass transition temperature Tg. A 25 ?m thick films were submitted to direct electrical field between 24 and 72 MV/m at a constant temperature in the range 80-180°C. The current-time J(t) characteristics showed that the current increases, after a few minutes of polarisation, then decreases, which reveals a peak. This last appears at a temperature localised between 80 and 100°C then disappears at the temperatures higher than 150°C. These characteristic temperatures are connected respectively to the transition beta* and the pre-melting of cristallites confirmed by the differential scanning calorimetry. The exploitation of the steady-state current showed a break in the curve of current according to the reverse of the temperature J(1/T) at a temperature bordering Tg. This behavior was associated to an ionic conduction in the material volume. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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