通过拟合温度得到了纳米铝粉在环氧丙炳快速反应中的反应率,结果表明:先前的理论模型不适用纳米铝粉的低点火温度原因的解释.在爆炸激波管内采集到了纳米铝粉多隙氧化物的辐射谱,通过对所得光谱的拟合,得出其反应温度约为3100K,误差不足100K.由于在谱的背景上,同时观察到了Al和AlO的线,AlO的谱强度随入射激波传播速度增大而加强.反应致密产物的辐射比相同温度下钨带灯的辐射要强.
The reacting rate is determined with fitting temperature,but the result shows that the previous theoretical models for bulk aluminum failure to describe the reactants in nano-scale regime. Time-resolved emission experiments on deflagrating metastable interstitial composites of nano-aluminum trioxide are formed in the detonation shock tube. Early in the experiment, the temperature obtained by fitting to a Planckian gray body appears accurate to be better than ± 100K(at 3100K). Spectral features due to Al and AlO species are observed in an apparent thermal background.The intensity of the AlO emission is observed to change with larger AlO intensities associated with faster shock wave propagation speeds. Absolute irradiance output from the compressed powder samples is found to exceed that from a tungsten filament at the same apparent temperature.
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