ABSTRACT Thermites are energetic composites made of metal and oxidizer particles that react according to an exothermic reaction and release large amounts of energy. Many possible metal and oxidizer couples exist in the literature. Here, the performance of the aluminum reducing metal and tin (IV) oxide (SnO2) combination was reported as a function of the fuel/oxidizer mass ratio. The Al/SnO2 energetic composite, in stoichiometric conditions, was insensitive to impact, sensitive to friction and extremely sensitive to electrostatic discharge. The combustion velocity was determined to be close to 600 m/s. Changing the stoichiometry affected both the sensitivity thresholds to the friction test (160 N to > 360 N) and flame propagation velocity (480–588 m/s) of the Al/SnO2 composite. These results are reported for the first time.

中文翻译：

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铝/锡 (IV) 氧化物铝热剂复合材料：敏感性和反应传播

摘要 铝热剂是由金属和氧化剂粒子组成的高能复合材料，它们根据放热反应进行反应并释放大量能量。文献中存在许多可能的金属和氧化剂对。在这里，铝还原金属和锡 (IV) 氧化物 (SnO2) 组合的性能被报告为燃料/氧化剂质量比的函数。在化学计量条件下，Al/SnO2 含能复合材料对冲击不敏感，对摩擦敏感，对静电放电极其敏感。燃烧速度被确定为接近600m/s。改变化学计量会影响 Al/SnO2 复合材料的摩擦测试灵敏度阈值（160 N 到 > 360 N）和火焰传播速度（480–588 m/s）。这些结果是首次报道。