O-146 Combustion Behaviour of Binary Pyrolants based on Mg, MgH2, MgB2, Mg3N2, Mg2Si and Polytetrafluoroethylene

November 2011
Dr Ernst-Christian Koch (Energetic Materials) , Volker Weiser, Evelin Roth - Fraunhofer Institut für Chemische Technologie ICT, Pfinztal, Germany

Binary pyrolants made from Mg, MgH2, MgB2, Mg3N2, Mg2Si and polytetrafluoroethylene display a wide range of burn rates at ambient pressure. The burn rates do not coincide with the theoretical maximum adiabatic combustion temperatures. The UV-VIS (λ = 250 – 700 nm) emission spectra of the combustion flames taken at ambient pressure under air show distinct differences thus pointing to dissimilar combustion mechanisms. The aerobic combustion temperatures for a number of stoichiometries have been calculated with a proprietary software code (BAM) by fitting the curve shape in the NIR range (λ = 1.2 – 1.7 μm). According to the intensity calibrated Infrared spectra (λ = 1.5 – 5 μm) the pyrolants yield intense blackbody radiation and in some cases offer superior spectral efficiency compared to Mg/PTFE.

Presentation details

This paper was presented to the 42nd ICT Conference held on 28 June-1 July 2011 in Karlsruhe, Germany