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Investigation of the Influence of Inert Solids on Ignition Sensitivity of Organic Powder

This work presents the results of the experimental characterization of the ignition sensitivity of solid inertant/combustible powders mixtures. Three inert solids (Alumina, Kieslguhr, Aerosil) and elven organic powders have been determined: 1) the minimum ignition energy, 2) the minimum ignition temperature in cloud and 3) the minimum ignition temperature in 5mm layer. Thermal Conductivity of alumina and Kieslghur were measured using a Thermal Conductivity Analyser TCi provided by C-Therm. The effects of the addition of inert solids are described and a simple model is porposed to represent the experimental results.

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