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采用自制的负氧平衡复合炸药前驱体,在密闭容器中充氮气保护下爆轰合成了碳包覆镍纳米颗粒。利用X射线衍射、X射线荧光、透射电镜和拉曼光谱等技术,对爆炸产物的组成成分、结构形貌等进行了观测。结果表明,爆轰产物主要由具有面心立方结构的镍晶核和碳元素构成,此外还含有其它微量元素;合成的纳米颗粒呈球形或椭球形状,颗粒尺寸主要分布在10~25 nm范围,包覆的碳壳厚度约1~2 nm,核壳结构完备。结合观测结果,对爆轰法合成碳包覆纳米颗粒的形成机制进行了简单的讨论。
The homemade negative oxygen balance composite explosives precursor was detonated to synthesize carbon-coated nickel nanoparticles under the protection of nitrogen in a sealed container. The composition, structure and morphology of the explosive products were observed by X-ray diffraction, X-ray fluorescence, transmission electron microscopy and Raman spectroscopy. The results show that the detonation products are mainly composed of nickel nuclei and carbon elements with face-centered cubic structure and other trace elements. The synthesized nanoparticles are spherical or ellipsoidal in shape with particle sizes mainly distributed in the range of 10-25 nm , Coated carbon shell thickness of about 1 ~ 2 nm, core-shell structure is complete. Combined with the observation results, the formation mechanism of carbon-coated nanoparticles by detonation was briefly discussed.