纳米碳/碳包铁材料合成及气相爆轰数值分析

本文从理论上分析了气相爆轰反应中爆轰产物组分与形成稳定爆轰的条件。通过以氧气与苯、氧气与溶有二茂铁的苯为原料,用气相爆轰形式制备了碳纳米材料与碳包铁纳米颗粒。爆炸产物经XRD与TEM表征发现,碳纳米材料呈球或准球状,颗粒尺寸在10~30nm,分散性较差。团簇区主要以无定型碳为主,分散区有少量洋葱状富勒烯。游离态碳与铁物质的量比影响碳包铁的形貌结构,其比值在10~28时,碳包铁纳米颗粒呈球状,核壳结构明显,分散性较好；大于50时,其形貌结构发生变化,部分碳以片状结构存在。

Preparation of Carbon/ Carbon coated Iron nano materials and Numerical analysis of Gaseous Detonation

In the paper, the condition of steady gaseous detonation and detonation product composition were analyzed theoretically. Nano carbon material and carbon coated iron nano particles were prepared by gaseous detonation method with oxygen and benzene, oxygen and benzene dissolved ferrocene, respectively. Characterized by X-ray diffraction and transmission electron microscope, it can be found that carbon nano materials are spherical or quasi-spherical, particle size ranges in 10~30nm, and dispersity is poor. The cluster area is mainly amorphous carbon, while a few of onion-like fullerenes in dispersing region. The molar ratio of free carbon and iron has an influence on morphology and structure of carbon coated iron nanoparticles. When the molar ratio value ranges in 10~28, carbon coated iron nanoparticles can be prepared, which are spherical, with a clear core-shell structure and good dispersion; when the value greater than 50, carbon coated iron morphology is changed and part of carbon with a sheet structure.