| Автор | Charpentier, S. |
| Автор | Kassiba, A. |
| Автор | Bulou, A. |
| Автор | Monthioux, M. |
| Автор | Cauchetier, M. |
| Дата выпуска | 1999 |
| dc.description | Structural and vibrational properties are investigated in SiC nanopowders synthesized by a CO<sub>2</sub> laser pyrolysis of (SiH<sub>4</sub>, C<sub>2</sub>H<sub>2</sub>) gaseous mixture and thermally treated up to 1800 °C. The structural modifications of the SiC crystallites and the arrangement of the carbon in excess are monitored at different annealing stages. A critical behaviour is revealed in the powder annealed at T <sub>a</sub> = 1500 °C through the features of the Raman spectra and the insulating-conductor transition. The significant electric conductivity (σ ≈ 0.05 S cm<sup>−1</sup>) which appears above T <sub>a</sub> is discussed with respect to the powder composition and the interface effects where the carbon in excess seems to play a key role. |
| Формат | application.pdf |
| Издатель | EDP Sciences |
| Копирайт | © EDP Sciences, 1999 |
| Название | Effects of excess carbon and vibrational properties in ultrafine SiC powders |
| Тип | research-article |
| DOI | 10.1051/epjap:1999236 |
| Electronic ISSN | 1286-0050 |
| Print ISSN | 1286-0042 |
| Журнал | The European Physical Journal Applied Physics |
| Том | 8 |
| Первая страница | 111 |
| Последняя страница | 121 |
| Аффилиация | Charpentier S.; Laboratoire de Physique de l'état condensé (UPRES-A CNRS 6087), Université du Maine, Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 09, France |
| Аффилиация | Kassiba A.; Laboratoire de Physique de l'état condensé (UPRES-A CNRS 6087), Université du Maine, Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 09, France |
| Аффилиация | Bulou A.; Laboratoire de Physique de l'état condensé (UPRES-A CNRS 6087), Université du Maine, Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 09, France |
| Аффилиация | Monthioux M.; CEMES (UPR CNRS 8011), B.P. 4347, 29 rue Jeanne Marvig, 31055 Toulouse Cedex, France |
| Аффилиация | Cauchetier M.; CEA-DRECAM, Service des Photons Atomes et Molécules, CE Saclay, 91191 Gif-sur-Yvette Cedex, France |
| Выпуск | 2 |
