Preparation and characterization of high-reactivity explosive-based nano-boron microspheres  

作　　者：Chen Dong Yi Wang Kanghui Jia Dan Song Xiaolan Song Chongwei An 

机构地区：[1]School of Materials Science and Engineering,North University of China,Taiyuan,030051,China [2]Jinxi Group Shanxi Jiangyang Chemical Co.,Ltd.,Taiyuan,030051,China [3]China Ordnance Institute of Science and Technology,Beijing,100089,China [4]School of Environment and Safety Engineering,North University of China,Taiyuan,030051,China

出　　处：《Particuology》2024年第10期125-136,共12页颗粒学报（英文版）

基　　金：supported by the Weapons and Equipment Advance Research Fund(grant No.6140656020201).

摘　　要：Boron nanoparticles,with their remarkably high gravimetric and volumetric calorific values,emerge as the most promising fuel in energetic fields.However,challenges such as susceptibility to oxidation,high ignition temperature,and low combustion efficiency have constrained their further applications.In this study,we fabricated high explosives based nano-boron microspheres with uniform size using the electrostatic spray method,in which the boron nanoparticles and high explosives(CL-20 or PETN)are closely bonded together by fluorinated polymer(F2602)and evenly distributed.The results indicated that the microspheres exhibited high sphericity and showed an enhanced antioxidant capability.The addition of high-energy explosives not only reduced the thermal oxidation temperature of nano-boron powder within the microspheres but also significantly enhanced the pressurization rate.Additionally,the microspheres with added high-energy explosives released more energy during the combustion process.Compared to physically mixed samples,electrostatically sprayed microspheres with a uniform microstructure still exhibited higher reactivity.Therefore,the design and synthesis of microspheres with controllable structures using the electrostatic spray method show promising application prospects.

关 键 词：Nano-boron CL-20 PETN ELECTROSPRAYING Ignition and combustion 

分 类 号：TB383[一般工业技术—材料科学与工程]