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在入射激波作用下,利用瞬态光谱测试系统研究了纳米铝对硝基甲烷快速反应的影响,对快速反应过程中产生的NO_2、CO、CO2、CH_2O、H_2O、A1O等主要产物的出现时间和辐射强度进行了测量.研究发现:添加纳米铝(1 g)后,硝基甲烷(1 mL)点火延迟时间提前了60%;其它产物的出现时间缩短了46%～60%,辐射强度增强了30%～100%;激波速度和反应温度分别提高了1.4和2.2倍.结果表明纳米铝明显加快了硝基甲烷快速反应过程,并使其爆炸效率大大提高.由实验观察到的结果,结合热力学和动力学方面的分析,对纳米铝催化硝基甲烷快速反应的机理进行了探索性的分析.此研究将有助于深入了解新型燃料空气炸药(FAE)反应的微观机理.
Under the action of incident shock wave, the effect of nanoalumina on the rapid reaction of nitromethane was studied by transient spectroscopy test system. The appearance time of NO 2, CO, CO 2, CH 2 O, H 2 O, AlO and other major products (1 mL), the ignition delay time of nitromethane (1 mL) was advanced by 60%, the appearance time of other products was shortened by 46% -60%, and the radiation intensity was enhanced 30% ~ 100%, the shock speed and the reaction temperature increased by 1.4 and 2.2 times, respectively.The results showed that nano-Al significantly accelerated the rapid reaction process of nitromethane and greatly increased the explosion efficiency.From the experimental results, Based on the analysis of thermodynamics and kinetics, the mechanism of rapid reaction of nitromethane catalyzed by nano-alumina was explored, which will help to understand the micro-mechanism of the new FAE reaction.