掺杂和密闭透窗对炸药激光起爆感度的影响

Effects of Dopants and Confined Windows on Laser Initiation Sensitivity of Explosives

用Bruccton法测定了掺杂碳黑和碳纳米管的RDX和PETN炸药的起爆阈值,同时比较了K9玻璃和蓝宝石两种玻璃透窗下激光起爆感度的区别,以及自由振荡和调Q两种激光模式对RDX和PETN起爆感度的影响。结果表明,掺杂碳黑和碳纳米管均可提高RDX和PETN的感度,碳黑的掺杂效果好于碳纳米管,其中掺杂质量分数1%碳黑的RDX和PETN的起爆感度最高。2 mm厚的蓝宝石透窗有利于RDX、纯PETN以及掺杂碳黑的PETN的激光起爆,2 mm厚的K9玻璃透窗有利于掺杂碳纳米管的PETN的起爆。K9玻璃约束下,自由振荡激光有利于大部分RDX的起爆,而两种玻璃透窗约束下,调Q激光更利于大部分PETN的起爆。

The sensitivities of undoped and doped RDX and PETN with carbon black and carbon nanotubes to Nd：YAG pulsed laser were compared.The explosives were confined by K9 and sapphire glasses.The threshold initiation energy of explosives was measured in Bruccton method.The influences of doping with carbon black,confining by K9 glass,and using free-running laser on the initiating sensitivities were compared with that of doping with carbon nanotubes,confining by sapphire glass,and using Q-switched laser.The results show that the dopants,carbon black and carbon nanotubes can enhance the laser initiation sensitivities of RDX and PETN,and the doped effects of carbon black is better than that of carbon nanotubes.RDX and PETN have the minimum initiated energy when they are doped with 1% carbon black.The confined sapphire glasses with thickness of 2 mm can reduce the initiation energy of RDX,pure PETN and PETN doped with carbon black.The PETN doped with carbon nanotubes can be initiated more easily under the confinement of K9 glasses which also has a thickness of 2 mm.Under the confinement of K9 glass,most RDX can be initiated easier by free-running laser than by Q-switched laser,but Q-switched laser is more suitable for the initiation of PETN under confinement of K9 and sapphire glass.