| Автор | A M Casanovas |
| Автор | I Coll |
| Автор | C Pradayrol |
| Автор | J Casanovas |
| Дата выпуска | 1998-10-21 |
| dc.description | The spark decomposition of and 50% mixtures (100 kPa) in the presence of a solid insulator struck by an electric arc is studied. The sparks were generated in a cylindrical Monel 400 cell between a stainless steel point and a stainless steel plane (gap space 0.9 mm) either under a 50 Hz ac voltage (90 J per disconnection) or by discharging a capacitor (3.59 J per spark). The gaseous by-products , , , , , , and were assayed by gas chromatography and their yields studied by varying the nature of the insulator material (Megelit, Kel-F (polytrifluorochloroethylene), Teflon, polypropylene, polyethylene, nylon) and the concentration of two additives: (0 and 0.2%) and (0 and 0.2%). As it becomes vaporized under the effect of the discharges, the insulator produces species that can trap the fluorine atoms released from decomposition and enhance the formation of by-products. This explains the main results of this work which can be summarized as follows. (i) Enhancement, by an order of magnitude or more, of by the insulators. (ii) A quantity of formed in the presence of the insulator proportional to the enhancement of . The ratio between the levels of these compounds proved to be the same regardless of the initial concentration of or added to the and the intensity of the sparks. (iii) Enhancement of the quantities of (up to fivefold), , and formed in the presence of an insulator whatever the gas sample studied. In the presence of an insulator, the - mixture led to results rather similar to those of concerning the levels of decomposition products formed. In all cases however, i.e. in the presence or absence of insulator or added or , the mixture led to decreased formation of the main products: and . Interference was seen to occur between the action of the insulator and that of and ; this is ascribed to reactions taking place between these molecules or their dissociation fragments. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Influence of a solid insulator on the spark decomposition of SF<sub>6</sub> and 50% SF<sub>6</sub> + 50% CF<sub>4</sub> mixtures |
| Тип | paper |
| DOI | 10.1088/0022-3727/31/20/018 |
| Electronic ISSN | 1361-6463 |
| Print ISSN | 0022-3727 |
| Журнал | Journal of Physics D: Applied Physics |
| Том | 31 |
| Первая страница | 2835 |
| Последняя страница | 2845 |
| Аффилиация | A M Casanovas; CPAT, ESA 5002, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse cedex, France |
| Аффилиация | I Coll; CPAT, ESA 5002, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse cedex, France |
| Аффилиация | C Pradayrol; CPAT, ESA 5002, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse cedex, France |
| Аффилиация | J Casanovas; CPAT, ESA 5002, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse cedex, France |
| Выпуск | 20 |
