Numerical Analysis of Gaseous Detonation and Preparation of Carbon and Carbon Coated Iron Nano Materials

The condition of steady gaseous detonation and detonation product composition were analyzed theoretically. Nano carbon material and carbon coated iron nanoparticles were prepared by a gaseous detonation method with oxygen and benzene, oxygen and benzene dissolved ferrocene, respectively. Explosion products were characterized by X-ray diffraction and transmission electron microscope. Results show that carbon nano materials are spherical or quasi-spherical, the particle size range is 10 similar to 30 nm, and dispersity is poor. The cluster area is mainly amorphous carbon, while a few onion-like fullerenes exist 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 range is 10 similar to 28, carbon coated iron nanoparticles can be prepared, which are spherical, with a clear core-shell structure and good dispersion; when the value is greater than 50, carbon coated iron morphology changes and part of carbon possesses a sheet structure.