铝粉点火微观机理的光谱研究

 铝粉是一种含能高的材料，它被广泛地添加到含能材料中。利用3台单色谱仪和OMA谱仪等多种谱仪技术，研究了铝粉在几种不同环境下的快速反应微观特性。研究表明：铝粉冲击波点火的临界条件和铝粉的物理状态相关。微米铝粉点火的临界温度为2 100 K，它接近Al₂O₃的熔化温度。它表明，在空气中容易氧化的微米铝粉点火，必须使铝粉表面的氧化层熔化。在气相反应中，微米铝粉和氧的反应是主要的；和水的反应是次要的。减小微米铝粉的颗粒尺寸，可以明显提高快速反应温度。 含铝复合燃料中的液体燃料反应后的铝粉才能参与反应；铝粉添加至气相反应介质后将明显提高反应温度。

The Spectro-Studies on Micro-Mechanism of Shock Ignition for Aluminium

The aluminum powder is a high energetic material. It is added into energetic materials. The results show that the critical conditions of shock ignition for micrometer-aluminum powder relate with physical behaviour for aluminum powder. The micro-behaviour of the fast reaction for micrometer-aluminum powder are studied by means of some spectrometer techniques-three monochromaters techniques and OMA spectral techniques. The critical temperature for the micrometer-aluminum powder is about 2100 K,and it is closed to the melting temperature of Al2O3. It is show that the Al2O3 layer must be melted,if the micrometer-aluminum powder may be ignited. It is important that the reaction of micrometer-aluminum powder with oxygen. It is not important that the reaction of micrometer-aluminum powder with water. The micrometer-aluminum powder may react,after a liquid fuel in compound fuel reacts. The reaction temperature is increased when micrometer-aluminum powder is added into energetic material and the particle size of micrometer-aluminum powder is decreased.