摘要
为了探究金属氧化物种类对铝热剂燃烧特性的影响,选取了Bi_(2)O_(3)、Fe_(2)O_(3)、MnO_(2)、CuO和MoO_(3)5种金属氧化物,采用液相混合制备了二元铝热剂,对5种铝热剂的反应热值、自蔓延燃烧特性、反应压力与点火延迟时间等燃烧特性进行了系统研究。结果表明:金属氧化物种类对铝热剂的燃烧特性有显著影响;Al-MoO_(3)具有最高反应热(氩气中为(4.10±0.05)kJ/g)、火焰蔓延速率((18.77±1.23)m/s)、火焰温度以及最短的点火延迟时间((1.15±0.06)s);Al-Bi_(2)O_(3)表现出最高的压力峰值和升压速率,压力峰值分别为Al-CuO、Al-MnO_(2)、Al-Fe_(2)O_(3)、Al-MoO_(3)的1.9、3.5、14.6、24.3倍。通过选择合适的金属氧化剂,可以实现铝热剂燃烧特性调控,为其在军事和工业领域应用提供参考。
To explore the influence of various metal oxides on the combustion behavior of Al-based thermites,five metal oxides(Bi_(2)O_(3),Fe_(2)O_(3),MnO_(2),CuO,and MoO_(3)),were selected and synthesized via a liquid-phase mixing method.The combustion characteristics,including reaction energy,self-propagating combustion properties,reaction pressure,and ignition delay time,were systematically investigated.The results demonstrated that the choice of metal oxide significantly impacted the combustion performance of Al-based thermites.Among them,Al-MoO_(3) exhibited the highest reaction energy in an Ar atmosphere((4.10±0.05)kJ/g),the fastest flame spead rate((18.77±1.23)m/s),the highest flame temperature,and the shortest ignition delay time((1.15±0.06)s).Meanwhile,Al-Bi_(2)O_(3) generated the highest peak pressure and pressure rise rate,with its peak pressure being 1.9,3.5,14.6,and 24.3 times greater than those of Al-CuO,Al-MnO_(2),Al-Fe_(2)O_(3),and Al-MoO_(3),respectively.These findings highlight the potential to regulate thermite combustion properties through strategic metal oxide selection,providing a theoretical foundation for military and industrial applications.
作者
蔡悦
刘雪莉
贺川
刘金旭
CAI Yue;LIU Xueli;HE Chuan;LIU Jinxu(School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081,China;National Key Laboratory of Science and Technology on Materials under Shock and Impact,Beijing Institute of Technology,Beijing 100081,China)
出处
《高压物理学报》
北大核心
2025年第9期64-72,共9页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金(52473246)。
关键词
铝热剂
燃烧性能
金属氧化物
反应压力
Al thermite
combustion properties
metal oxides
reaction pressure
