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. 2020 May 20;11(5):516.
doi: 10.3390/mi11050516.

A Facile Preparation and Energetic Characteristics of the Core/Shell CoFe2O4/Al Nanowires Thermite Film

Chunpei Yu  1 , Wei Ren  2   3 , Ganggang Wu  1 , Wenchao Zhang  1 , Bin Hu  1 , Debin Ni  2 , Zilong Zheng  1 , Kefeng Ma  1 , Jiahai Ye  1 , Chenguang Zhu  1
Affiliations

A Facile Preparation and Energetic Characteristics of the Core/Shell CoFe2O4/Al Nanowires Thermite Film

Chunpei Yu et al. Micromachines (Basel). .

Abstract

In this study, CoFe2O4 is selected for the first time to synthesize CoFe2O4/Al nanothermite films via an integration of nano-Al with CoFe2O4 nanowires (NWs), which can be prepared through a facile hydrothermal-annealing route. The resulting nanothermite film demonstrates a homogeneous structure and an intense contact between the Al and CoFe2O4 NWs at the nanoscale. In addition, both thermal analysis and laser ignition test reveal the superb energetic performances of the prepared CoFe2O4/Al NWs nanothermite film. Within different thicknesses of nano-Al for the CoFe2O4/Al NWs nanothermite films investigated here, the maximum heat output has reached as great as 2100 J·g-1 at the optimal thickness of 400 nm for deposited Al. Moreover, the fabrication strategy for CoFe2O4/Al NWs is also easy and suitable for diverse thermite systems based upon other composite metal oxides, such as MnCo2O4 and NiCo2O4. Importantly, this method has the featured advantages of simple operation and compatibility with microsystems, both of which may further facilitate potential applications for functional energetic chips.

Keywords: composite metal oxide; core/shell; energy release; nanoenergetic materials; nanothermite; nanowires structure.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Schematic diagram for the fabrication of the core/shell CoFe2O4/Al nanothermite film.
Figure 2
Figure 2
The XRD patterns of the CoFe2O4 nanowires (NWs) film and the CoFe2O4/Al NWs nanothermite film.
Figure 3
Figure 3
The scanning electron microscopy (SEM) images of the (a,b) CoFe2O4 NWs film, (c) CoFe2O4 NWs film from the side view, (d) CoFe2O4/Al NWs nanothermite film (Al = 200 nm), (e) CoFe2O4/Al NWs nanothermite film (Al = 400 nm), (f) CoFe2O4/Al NWs nanothermite film (Al = 600 nm) and (g) elemental mappings of CoFe2O4/Al NWs nanothermite film (Al = 400 nm).
Figure 4
Figure 4
The transmission electron microscopy (TEM) images of the (a) CoFe2O4 NWs, (b) CoFe2O4/Al NWs (Al = 200 nm), (c,d,e) high resolution transmission electron microscopy (HRTEM) images of CoFe2O4/Al NWs (Al = 200 nm), and (f) the corresponding element mappings of CoFe2O4/Al NWs.
Figure 5
Figure 5
The differential scanning calorimetry (DSC) curve of the CoFe2O4/Al NWs nanothermite film (Al = 400 nm).
Figure 6
Figure 6
The high-speed camera photos of the ignition process of the CoFe2O4/Al NWs nanothermite film (Al = 400 nm).
See this image and copyright information in PMC

References

    1. He W., Liu P.J., He G.Q., Gozin M., Yan Q.L. Highly reactivemetastable intermixed composites (MICs): Preparation and characterization. Adv. Mater. 2018;30:e1706293. doi: 10.1002/adma.201706293. - DOI - PubMed
    1. Sundaram D., Yang V., Yetter R.A. Metal-based nanoenergetic materials:synthesis, properties, and applications. Prog. Energy Combust. Sci. 2017;61:293–365. doi: 10.1016/j.pecs.2017.02.002. - DOI
    1. Khasainov B., Comet M., Veyssiere B., Spitzer D. Comparison of performance of fast-reacting nanothermites and primary explosives. Propellants Explos. Pyrotech. 2017;42:754–772. doi: 10.1002/prep.201600181. - DOI
    1. Dong Z., Al-Sharab J.F., Kear B.H., Tse S.D. Combined flame and electrodeposition synthesis of energetic coaxial tungsten-oxide/aluminum nanowire arrays. Nano Lett. 2013;13:4346–4350. doi: 10.1021/nl4021446. - DOI - PubMed
    1. Su H., Zhang J., Du Y., Zhang P., Li S., Fang T., Pang S. New roles of metal-organic frameworks: Fuels for aluminum-free energetic thermites with low ignition temperatures, high peak pressures and high activity. Combust. Flame. 2018;191:32–38. doi: 10.1016/j.combustflame.2017.11.019. - DOI

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