铝粉粒度对乳化炸药能量输出特性及热安定性的影响

为了研究铝粉粒度对乳化炸药水下爆炸能量输出的影响，在相同乳化炸药中分别添加3种不同粒度的铝粉制得含铝乳化炸药。利用水下爆炸实验，获得冲击波压力时程曲线，经分析计算得到峰值压力、冲击波冲量、比冲击波能、比气泡能、总能量等水下爆炸能量参数。并运用DSC-TG联用技术测试添加不同粒度铝粉的乳化炸药在不同升温速率下的热安定性。结果表明：铝粉粒度对乳化炸药水下爆炸的能量有较大的影响，添加了中粒度（平均粒度为177.2 μm）铝粉的乳化炸药各能量参数均达到最大值，而3组样品的热安定性则随着铝粉粒度的减小而降低，活化能的最大降幅达3.7%。

Influence of aluminum particle size on energy output characteristics and thermal stability of emulsion explosive

In order to study the influence of aluminum particle size on underwater explosion energy output of emulsion explosive, three kinds of aluminized emulsion explosives were prepared by mixing emulsion explosive with aluminum powder with different particle sizes, respectively. Pressure-time curves were determined by underwater explosion experiments, and underwater explosion energy parameters were obtained by analyzing the curves. The thermal stability of emulsion explosive which contained different particle sizes of aluminum powder were examined by means of DSC and TG methods at various heating rates. The results showed that the aluminum particle size had a great influence on underwater explosion energy of emulsion explosive. The underwater explosion energy output of emulsion explosive reached the maximum when the medium grain size aluminum powder (average particle size was 177.2 μm) was added, but the thermal stability of three samples reduced with the decrease of aluminum particle size. The biggest falling range of the activation energy was 3.7%.