Al/Bi2O3含能半导体桥的安全性能研究OA

To address the issue of low output energy in pyrotechnics based on semiconductor bridges(SCB),an energetic semiconductor bridge(ESCB)integrated with Al/Bi2O3 energetic films and SCB was designed and prepared.The safety performances of ESCB were evaluated through constant current safety tests,electromagnetic irradiation tests,and e-lectrostatic safety tests.Meanwhile,SCB and Al/Bi2O3-ESCB were ignited on B/KNO3 insensitive ignition powder to verify the output performance of Al/Bi2O3-ESCB.The results indicate that the prepared Al/Bi2O3 energetic film possesses uniform composition and a smooth structure.The Al/Bi2O3-ESCB integrated with the semiconductor bridge exhibits excellent safety performance.The safe current reaches 1.2 A.It can withstand electromagnetic irradiation under three conditions(100 MHz at 700 V/m,400 MHz at 700 V/m,and 900 MHz at 560 V/m)without significant performance degradation.In electrosta-tic discharge test,it does not ignite and its resistance does not change significantly.Compared to SCB,Al/Bi2O3-ESCB significantly enhances the resistance to constant current excitation and improves ignition output capability.Specifically,when excited by a 47 μF and 50 V capacitor,it can reliably ignite the B/KNO3 insensitive ignition powder under both con-tact conditions and non-contact conditions with a gap of 1.3 mm or less.