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采用纳米金刚石与B_2O_3高温共熔,与Al溶胶溶液均匀混合等步骤制备前驱体粉末,与不同质量分数黑索金均匀混合制成药卷,起爆药卷,收集爆轰产物分析。利用XRD、场发射透射电镜观察,并且运用BKW计算程序运算含Al、B元素特殊炸药的爆轰参数,探讨产物生成的机制。分析爆轰产物的组成成分、形貌结构。结果表明:纳米金刚石-Al_2O_3结构的纳米颗粒具备纳米金刚石易与任何极性物质兼容、分散稳定好、不易团聚等优点。爆轰反应生成的高温、高压使Al_2O_3、B_2O_3-纳米金刚石分子间的化学键断裂,形成游离态的B_2O_3-纳米金刚石、Al_2O_3自由基,自由碰撞后迅速凝结成小液滴。高温作用下,Al_2O_3熔化成球状,吸附B_2O_3-纳米金刚石,且黑索金比重越大,得到的产物包覆结构越明显。形成的纳米颗粒比原有的纳米金刚石粉末粒径增大许多。
The precursor powder was prepared by high-temperature co-melting of nano-diamond and B_2O_3 and uniformly mixing with Al sol solution, uniformly mixing with different mass fractions of saxophloxacin to prepare a drug coil and detonating the drug coil, and analyzing the detonation products. Using XRD and field emission transmission electron microscopy, the detonation parameters of special explosives containing Al and B elements were calculated by BKW calculation and the mechanism of product formation was discussed. Analysis of the composition of detonation products, topography. The results show that the nano-diamond-Al_2O_3 nanoparticles have the advantages of nano-diamond easily compatible with any polar substances, good dispersion stability, and not easy to agglomerate. The high temperature and high pressure generated by the detonation reaction break the chemical bonds between the molecules of Al 2 O 3 and B 2 O 3 nano-diamond to form free B 2 O 3 nano-diamond and Al 2 O 3 free radicals, which condense into small droplets after free collision. Under the action of high temperature, Al 2 O 3 melts into a spherical shape and adsorbs B 2 O 3 - nano-diamond, and the greater the specific gravity of the black sapphire, the more obvious the structure of the product obtained. The size of the nanoparticles formed is much larger than that of the original nano-diamond powder.