微型雷管药高比对输出威力的影响

为了适应MEMS引信微型传爆序列的需求,针对微型雷管装药高度比对输出威力的影响开展了专门研究。改变装药直径为0.9 mm、装药高度为3 mm的微型雷管中起爆药与猛炸药装药高度比,用猛铜压阻传感器对爆轰输出压力进行测定,得到微型雷管中起爆药的临界高度为0.36 mm。当起爆药高度为1.65 mm时,微型雷管爆轰压力值最大,为10.3 GPa;当起爆药高度小于1.65 mm,HMX炸药高度大于1.35 mm时,随着起爆药高度的减小,猛炸药高度的增加,微型雷管的爆压值减小;当起爆药高度大于1.65 mm、HMX炸药高度小于1.35 mm时,随着起爆药高度的增加,猛炸药高度的减小,微型雷管的爆压值也减小。初步得出了羧铅起爆药和猛炸药的最佳高度比范围为0.69~2.26。

Investigation into Charge Height Ratio of Micro-Detonator on the Output Detonation Pressure

In order to accommodate to the needs of micro-explosive train in MEMS fuze, this paper carried out a specific study about the influence of charge height on the output detonation pressure in micro-detonator. The charge diameter is 0.9 mm, total height is 3 mm. The charge ratio of primary explosive and high explosive was to be changed. The output detonation pressure was measured by manganin piezoresistance method. In the micro-detonator, the critical height of primary explosive PbN₆ is 0.36 mm. When the primary explosive PbN₆ height is 1.65 mm, the micro-detonator has the maximal output detonation pressure 10.3 GPa. When the primary explosive PbN₆ height is less than or more than 1.65 mm, the high explosive HMX height is less than or more than 1.35 mm, and the output detonation pressure of the micro-detonator is reduced. The range of the primary explosive PbN₆ and the high explosive HMX is 0.69～2.26.