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Synthesis of Carbon-encapsulated Iron and Alumina Nanoparticles by Detonation Method

Author: WuGuiShun
Tutor: LiXiaoJie
School: Dalian University of Technology
Course: Engineering Mechanics
Keywords: nano-materials detonation synthesis carbon-encapsulated iron ironencapsulated alumina detonation parameters
CLC: TB383
Type: Master's thesis
Year: 2012
Downloads: 40
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Abstract


This article describes the research back grand of carbon-encapsulated nano-metal materials and carbon-encapsulated nano-metal materials preparation methods. And then point out the extensive application of nano-alumina and the significance of this paper. Experiments were divided into three categories according to having or not the iron and the different iron materials. Total of seven experiments on detonation synthesis of carbon-encapsulated iron, iron encapsulated alumina nanoparticles were exploratory studied. Products were respectively characterized by XRD and TEM. HRTEM and SEM were used to characterize the typical sample. The carbon-encapsulated iron nanopaticles and carbon-encapsulated iron, iron encapsulated alumina nanoparticles are difficult to distinguish in the TEM. The carbon-encapsulated iron, iron encapsulated alumina three layer nano-particles were thought to exist in the detonation products by analyzing and comparing the results carefully. Although not very sure of the existence of the three layers of nanoparticles, but the carbon-coated alumina nanoparticles must exist by SEM analysis. The higher detonation temperature, low detonation pressure, smaller particle precursor mixed explosives are more conducive to the formation of graphite encapsulated nanoparticles through the analysis of particle morphology and detonation parameters of all samples. Detonation reaction made alumina rounded by comparison the shape of alumina before and after the detonation. Finally, the possible formation mechanism of detonation synthesis of carbon-encapsulated iron and alumina nanoparticles were analyzed qualitatively.

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