The effect of Si-Bi2O3 system on the ignition of the AI-CuO thermite
The ignition temperature of the aluminium copper oxide (Al-CuO) thermite was measured using differential thermal analysis (DTA) at a scan rate of 50 °C/min in an inert nitrogen atmosphere. Thermite reactions are difficult to start as they require very high temperatures for ignition, e.g. for the Al-...
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2013
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| Online Access: | http://hdl.handle.net/2263/28125 Ilunga, K 2011, The effect of Si-Bi2O3 system on the ignition of the AI-CuO thermite, MSc dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/28125 > E11/9/133/gm http://upetd.up.ac.za/thesis/available/etd-09222011-094345/ |
| Summary: | The ignition temperature of the aluminium copper oxide (Al-CuO) thermite was measured using differential thermal analysis (DTA) at a scan rate of 50 °C/min in an inert nitrogen atmosphere. Thermite reactions are difficult to start as they require very high temperatures for ignition, e.g. for the 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 used as sensitiser. Further improvement is achieved when nano-sized particles are used. For the composition CuO + Al + Bi2O3 + Si (65.5:14.5:16:4 wt %), when all components except the aluminium fuel are nano-sized, the observed ignition temperature is reduced to ca. 615 °C and results in a thermal runaway. === Dissertation (MSc)--University of Pretoria, 2011. === Chemical Engineering === unrestricted |
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