Boron is a very promising and highly attractive fuel because of high calorific value. However, the practical applications in explosives and propellants of boron have been limited by long ignition delay time and low combustion efficiency. Herein, nano-Al and graphene fluoride (GF) as surface activated materials are employed to coat boron (B) particles to improve ignition and combustion performance. The reaction heat of nano-Al coated B/KNO₃ and GF coated B/KNO₃ are 1116.83 J/g and 862.69 J/g, respectively, which are higher than that of pure B/KNO₃ (823.39 J/g). The ignition delay time of B/KNO₃ could be reduced through nano-Al coating. The shortest ignition delay time is only 75 ms for B coated with nano-Al of 8 wt%, which is much shorter than that of pure B/KNO₃ (109 ms). However, the ignition delay time of B/KNO₃ coated with GF has been increased from 109 to 187 ms. B coated with GF and nano-Al shown significantly influence on the pressure output and flame structure of B/KNO₃. Furthermore, the effects of B/O ratios on the pressure output and ignition delay time have been further fully studied. For B/KNO₃ coated with nano-Al and GF, the highest pressures are 88 KPa and 59 KPa for B/O ratio of 4:6, and the minimum ignition delay time are 94 ms and 148 ms for B/O ratio of 7:3. Based on the above results, the reaction process of boron coated with GF and nano-Al has been proposed to understand combustion mechanism.

由于热值高，硼是一种非常有前途和极具吸引力的燃料。然而，硼在炸药和推进剂中的实际应用受到点火延迟时间长和燃烧效率低的限制。在此，纳米铝和氟化石墨烯（GF）作为表面活性材料被用来包覆硼（B）颗粒以改善点火和燃烧性能。纳米Al包覆B/KNO ₃和GF包覆B/KNO ₃的反应热分别为1116.83 J/g和862.69 J/g，均高于纯B/KNO ₃ (823.39 J/g)。_{B/KNO 3}的着火延迟时间可以通过纳米铝涂层来减少。涂有8 wt%纳米Al的B的最短点火延迟时间仅为75 ms，远短于纯B/KNO ₃ (109 ms)。_{然而，涂有 GF 的 B/KNO 3}的着火延迟时间已从 109 ms 增加到 187 ms。GF和纳米Al包覆的B对B/KNO ₃的压力输出和火焰结构有显着影响。此外，还进一步充分研究了 B/O 比对压力输出和点火延迟时间的影响。对于 B/KNO ₃涂有纳米Al和GF的B/O比为4:6时最高压力为88 KPa和59 KPa，B/O比为7:3时最小着火延迟时间为94 ms和148 ms。基于上述结果，提出了用 GF 包覆的硼与纳米铝的反应过程，以了解燃烧机理。