碳包覆铁纳米颗粒的气相爆轰合成（英文）

发布时间：2018-03-05 15:42

本文选题：纳米颗粒　切入点：气相爆轰　出处：《高压物理学报》2016年03期 　论文类型：期刊论文

【摘要】：以粉末状与气态二茂铁为原料,以氢气和氧气混合气体为爆轰能源,采用气相爆轰法进行了合成碳包覆铁纳米颗粒实验。XRD和TEM实验结果表明,采用两种不同状态的二茂铁,均得到了纳米碳包覆铁颗粒。该包覆颗粒的组成核为铁或铁碳化合物,外层壳主要由石墨碳组成,大部分球形纳米颗粒尺寸分布于5~30 nm之间。通过对比发现,采用气态二茂铁爆轰时,所得到的碳包铁粒度分布较为集中,壳层厚度比较均匀,且粒子具有较好的球形状。最后结合铁碳合金相图,从热处理角度对气相爆轰合成碳包覆铁纳米颗粒的机理进行了分析,得出产物中α-Fe与Fe_3C的形成过程。分析了碳包覆铁纳米颗粒的磁滞回线,其表现出硬磁性与顺磁性双重性质。
[Abstract]:Using ferrocene powder and gaseous ferrocene as raw material and mixed gas of hydrogen and oxygen as detonation energy, the carbon coated iron nanoparticles were synthesized by gas phase detonation method. The results of XRD and TEM showed that ferrocene in two different states was used. The core of the coated particles is iron or iron carbon compounds, and the outer shell is mainly composed of graphite carbon. Most of the spherical nanoparticles are distributed in the range of 530 nm. When the gaseous ferrocene was detonated, the particle size distribution of carbon coated iron was more concentrated, the shell thickness was more uniform, and the particles had better spherical shape. Finally, the phase diagram of Fe-C alloy was combined. From the point of view of heat treatment, the mechanism of carbon-coated iron nanoparticles synthesized by gas phase detonation was analyzed, and the formation process of 伪 -Fe and Fe_3C in the products was obtained. The hysteresis loop of carbon coated iron nanoparticles was analyzed, which showed both hard magnetic and paramagnetic properties.
【作者单位】：大连理工大学工业装备结构分析国家重点实验室;
【基金】：National Science Foundation of China(10872044,10602013,10972051,10902023) Natural Science Foundation of Liaoning Province of China(20082161)
【分类号】：TB383.1;O389

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