Measurements and Analyses of Electro-Exploding Products Generated by Semiconductor Bridge Igniters

摘要

In an effort to investigate the characteristics of electro-exploding products generated by Al/CuO-semiconductor bridge igniters, high-speed camera and spectrum diagnosis systems are employed in this paper. By using the high-speed camera system, the electro-exploding processes are recorded and the results indicate that electro-exploding processes include extrinsic conduction, intrinsic excitation, melting, vaporization, plasma discharging, and Al/CuO combustion. During this process, the spatial dimensions of plasma could reach to 8.7 mm in vertical direction under excitation energy of 47 μF/50 V. Meanwhile, the Al/CuO films are ejected from ceramic housing by plasma shock wave, combust upon plasma and plume. According to the results from the spectrum diagnosis system, it is noted that the temperature maintains 4000-6500 K for 65 μs.