高钝感半导体桥发火性能研究  

Research on the Ignition Performance of High Insensitive Semiconductor Bridge

作　　者：郑子龙 张文超[1] 秦志春[1] 吴刚刚 俞春培 王嘉鑫 陈亚杰 叶家海[1] 田桂蓉[1] ZHENG Zilong;ZHANG Wenchao;QIN Zhichun;WU Ganggang;YU Chunpei;WANG Jiaxin;CHEN Yajie;YE Jiahai;TIAN Guirong(School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China)

机构地区：[1]南京理工大学化工学院

出　　处：《兵工学报》2019年第5期954-961,共8页Acta Armamentarii

基　　金：国家自然科学基金项目(51576101);中央高校基本科研业务费专项项目(30918015102);江苏省“青蓝工程”资助项目(2016年);江苏省研究生科研与实践创新计划项目(KYCX18_0478)

摘　　要：为了提高半导体桥(SCB)火工品的安全性,在SCB极脚间并联负温度系数(NTC)热敏电阻,可使NTC-SCB半导体桥满足1.5A不发火、最高2.0A不发火的高钝感要求。研究了1.0A和1.5A通电条件下NTC热敏电阻与SCB并联后的分流情况,通过电容放电、恒流激励下的发火实验和发火感度实验对比分析了SCB、NTC-SCB和1.5A、2.25W、5min安全电流实验后的NTC-SCB半导体桥发火性能。结果表明:在1.0A、1.00W、5min和1.5A、2.25W、5min安全电流实验条件下,NTC热敏电阻的分流比约为35%和62%,达到热平衡时的温度大约为112℃和170℃;在33μF、30V电容放电条件下并联NTC热敏电阻及1.5A、2.25W、5min安全电流实验后,SCB的发火时间和临界发火能量均没有出现显著性变化;在7.0A恒流激励下,由于输入能量速率较慢以及NTC热敏电阻分流的原因,发火时间和临界发火能量均有较明显提高;SCB的99.9%发火电流在并联NTC热敏电阻后从2.329A增加到3.709A,NTC-SCB的99.9%发火电流在1.5A、2.25W、5min安全电流实验后从3.709A增加到4.285A,仍然可用于提供大于5.571A电流的火工装置。A negative temperature coefficient (NTC)-semiconductor bridge (SCB) was prepared to improve the safety of SCB explosive initiator by paralleling a NTC thermistor to SCB, which is able to meet the requirement of high insensitiveness in 1.5 A and maximum 2.0 A non-firing stimuli tests. The split ratios at 1.0 A and 1.5 A after paralleling NTC thermistor to SCB were analyzed. Capacitance discharge ignition test, constant current excitation test and ignition sensitivity test were made to study the ignition performances of SCB, NTC-SCB and NTC-SCB after 1.5 A, 2.25 W and 5 min safe current test. Results show that the split ratios of NTC thermistor are about 35% and 62%, and thermal equilibrium temperatures are about 112 ℃ and 170 ℃ in 1.0 A, 1.00 W and 5 min, and 1.5 A, 2.25 W and 5 min safe current test, respectively. The ignition time and critical ignition energy are not show significant changes at 33 μF/30 V, but significantly increase at 7.0 A due to slow energy input rate and NTC thermistor shunt. Furthermore, 99.9% firing current of NTC-SCB increases from 2.329 A to 3.709 A after paralleling NTC thermistor and further increases from 3.709 A to 4.285 A after 1.5 A, 2.25 W and 5 min safe current test, which can be applied to the devices with ignition current greater than 5.571 A.

关 键 词：半导体桥 火工品 高钝感 热敏电阻 发火性能 

分 类 号：TJ45[兵器科学与技术—火炮、自动武器与弹药工程]