Document Type Master's Dissertation Author Ilunga, Kolela firstname.lastname@example.org URN etd-09222011-094345 Document Title The effect of Si-Bi2O3 system on the ignition of the AI-CuO thermite Degree MSc Department Chemical Engineering Supervisor
Advisor Name Title Prof W W Focke Supervisor Keywords
- ignition temperature
- melting temperature
Date 2011-09-06 Availability unrestricted Abstract
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.
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Please cite as follows:
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://upetd.up.ac.za/thesis/available/etd-09222011-094345 / >
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