IGNITION DYNAMICS OF BORON PARTICLES IN A SHOCK-TUBE

Small crystalline boron particles (1-15 mu m) are ignited in pure oxyg en and oxygen/fluorine atmospheres at the endwall of a high-pressure ( 8.5 atm) shock tube to study the effect of temperature, particle size, and fluorine additives on ignition delay time, An infrared detector i s used to observe gaseous B2O3 emission, while a visible wavelength ph otodiode is used simultaneously to observe BO2 emission, Both infrared and visible data are presented showing particle size and temperature effects.