Use of Bismuth Chromate with Antimony Trisulphide in Delay Compositions
| Autor: | N. G. Swarge, Saivenkataraman Jayaraman, J. P. Agrawal, R. G. Sarawadekar |
|---|---|
| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Journal of Energetic Materials. 21:97-107 |
| ISSN: | 1545-8822 0737-0652 |
| Popis: | Antimony trisulphide is used with potassium perchlorate, barium chromate, and binder in delay compositions. The effect of substitution of barium chromate by bismuth chromate in the system barium chromate-antimony trisulphide-potassium perchlorate has been studied and reported here. These compositions contain 20% antimony trisulphide, 10% potassium perchlorate, and the remainder barium chromate/bismuth chromate. It is observed that the burning rate decreases from 0.43 to 0.23 cm/s with an increase in bismuth chromate content. The ignition temperature of these compositions determined by Differential Thermal Analysis (DTA) is found to be in the range 400 ′ 10'C, the same for all compositions. Theoretical calculations by a chemical equilibrium program (REAL) are used to discuss the possible reaction mechanism. Thermo gravimetry (TG)/Differential Scanning Calorimetry (DSC) data are reported. It is observed that the main exothermic peak of the compositions containing bismuth chromate shows at about 462°C as compared to the basic system, where it is at 498°C. These compositions are safe to handle, as suggested by sensitivity data. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|