1. The effect of Si–Bi2O3 on the ignition of the Al–CuO thermite
- Author
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Ilunga, K., del Fabbro, O., Yapi, L., and Focke, W.W.
- Subjects
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FIREWORKS , *NANOPARTICLES , *HIGH temperatures , *NITROGEN , *ALUMINUM , *SILICON , *THERMAL analysis - Abstract
Abstract: The ignition temperature of the Al–CuO thermite was measured using DTA at a scan rate of 50°Cmin−1 in a nitrogen atmosphere. Thermite reactions are difficult to start as they require very high temperatures for ignition, e.g. for Al–CuO thermite comprising micron particles it is ca. 940°C. It was found that the ignition temperature is significantly reduced when the binary Si–Bi2O3 system is added as sensitizer. Further improvement is achieved when the reagents are nano-sized powders. For the composition Al+CuO+Si+Bi2O3 (65.3:14.7:16:4wt.%), with all components nano-sized, the observed ignition temperature is ca. 613°C and a thermal runaway reaction is observed in the DTA. [Copyright &y& Elsevier]
- Published
- 2011
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