Abstract Aluminum (Al) is widely used in thermites, and iodine pentoxide (I2O5) is a strong oxidizer that can release gas phase iodine. The result is a potentially very powerful and effective energetic composite with biocidal properties. However, the alumina coating on the Al presents a diffusion barrier that increases the ignition temperature. In this paper, nano titanium powders (nTi) were added at various mass ratios to Al/I2O5 and a composite mesoparticle was assembled by electrospray. Combustion studies showed that nano Ti can enhance the reactivity of Al/I2O5 thermites significantly with increases in pressure, pressurization rate and dramatic decreases in burn time. Part of this behavior can likely be attributed to less sintering enhancing the completeness of reaction in the Ti added cases. Addition of titanium to aluminum was found to have a significant impact on ignition and when Al is replaced with Ti, the ignition temperature was ∼300 °C below that of the corresponding aluminum thermite. These results show that titanium can be used as a fuel to tune energetic behavior and iodine release temperature and in some ways superior to aluminum.

中文翻译：

---

钛增强 Al/I2O5 中颗粒复合材料的点火和燃烧

摘要 铝（Al）广泛用于铝热剂，而五氧化二碘（I2O5）是一种能释放气相碘的强氧化剂。结果是潜在的非常强大且有效的具有杀生物特性的高能复合材料。然而，Al 上的氧化铝涂层会形成扩散屏障，从而提高着火温度。在本文中，将纳米钛粉 (nTi) 以不同的质量比添加到 Al/I2O5 中，并通过电喷雾组装复合中间颗粒。燃烧研究表明，随着压力、加压速率的增加和燃烧时间的显着减少，纳米钛可以显着提高 Al/I2O5 铝热剂的反应性。这种行为的一部分可能是由于在添加 Ti 的情况下，较少的烧结增强了反应的完整性。发现向铝中添加钛对点火有显着影响，当 Al 被 Ti 取代时，点火温度比相应的铝铝热剂低约 300 °C。这些结果表明，钛可以用作燃料来调节能量行为和碘释放温度，并且在某些方面优于铝。