Ignition energy flash

Important flammability characteristics are the lower and upper flammability limits, the flash point, the minimum ignition energy, the minimum oxygen concentration, and the autoignition temperature. Values of some of these properties are published for many compounds (NFPA, 1994). These numbers have typically been developed under standardized test conditions. Process conditions may influence their values. 

No single parameter defines flammability. Commonly used terms are flash point, flammability limits, autoignition temperature, minimum ignition energy and burning velocity. 

Minimum Ignition Energies of Explosives by Light Flashes (Refs 32 72)... 

Light-Flash Ignition Energies for Azides and Mixtures (Ref 80 ... 

Lead styphnate and mercuiy fulminate can be initiated by light but show two requirements for propagation. They either bum with a velocity of a few meters per second or detonate. The minimum critical ignition energy for lead styphnate monohydrate crystals covered with a quartz plate is 29 J [32]. If a water filter was used, the value was 31 J, showing that infrared radiation plays little part in the initiation, the temperature rise being produced by absorption of the blue or ultraviolet light emitted by the flash. 

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