应用石蜡包覆黑索金(RDX),加入硝酸铜制得混合炸药药柱,以氮气作为保护气在爆炸容器中引爆,制备了碳包覆铜纳米粒子。利用X射线衍射仪(X-Ray Diffraction,XRD)、透射电镜(Transmission Electron Microcopy,TEM)、拉曼光谱仪对产物成分...应用石蜡包覆黑索金(RDX),加入硝酸铜制得混合炸药药柱,以氮气作为保护气在爆炸容器中引爆,制备了碳包覆铜纳米粒子。利用X射线衍射仪(X-Ray Diffraction,XRD)、透射电镜(Transmission Electron Microcopy,TEM)、拉曼光谱仪对产物成分和形貌进行了表征。结果发现:爆轰产物呈球状,粒径分布在20~45 nm;外壳碳包覆层厚度为3 nm,主要由石墨和无定型碳构成。利用差示扫描量热分析仪(Differential Scanning Calorimeter,DSC)研究了碳包覆铜纳米粒子对高氯酸铵(Ammonium Perchlorate,AP)热分解性能的影响,结果表明:将5%碳包覆铜纳米粒子作为催化剂混合加入到AP中,在5、10、20℃/min的升温速率下,AP的高温分解峰分别提前了72.77、72.93、74.77℃;AP的表观活化能下降了27.18 k J/mol,表现出对AP热分解过程具有显著的催化作用。展开更多
Carbon encapsulated Fe nanoparticles were successfully prepared via confined arc plasma method. The composition, morphology, microstructure, specific surface area and particle size of the product were characterized vi...Carbon encapsulated Fe nanoparticles were successfully prepared via confined arc plasma method. The composition, morphology, microstructure, specific surface area and particle size of the product were characterized via X-ray diffraction, transmission electron microscopy, high resolution transmission electron microscopy, energy dispersive X-ray spectrometry and Brunauer-Emmett-Teller N2 adsorption. The experiment results show that the carbon encapsulated Fe nanoparticles have clear core-shell structure. The core of the particles is body centered cubic Fe, and the shell is disorder carbons. The particles are in spherical or ellipsoidal shapes. The particle size of the nanocapsules ranges from 15 to 40 nm, with the average value of about 30 nm. The particle diameter of the core is 18 nm, the thickness of the shells is 6-8 nm, and the specific surface area is 24 m2/g.展开更多
基金Project(208151)supported by the Key Project of Ministry of Education,ChinaProject(1014RJZA035)supported by the Natural Science Foundation of Gansu Province,China
文摘Carbon encapsulated Fe nanoparticles were successfully prepared via confined arc plasma method. The composition, morphology, microstructure, specific surface area and particle size of the product were characterized via X-ray diffraction, transmission electron microscopy, high resolution transmission electron microscopy, energy dispersive X-ray spectrometry and Brunauer-Emmett-Teller N2 adsorption. The experiment results show that the carbon encapsulated Fe nanoparticles have clear core-shell structure. The core of the particles is body centered cubic Fe, and the shell is disorder carbons. The particles are in spherical or ellipsoidal shapes. The particle size of the nanocapsules ranges from 15 to 40 nm, with the average value of about 30 nm. The particle diameter of the core is 18 nm, the thickness of the shells is 6-8 nm, and the specific surface area is 24 m2/g.
