A high energy output and low onset temperature nanothermite based on three-dimensional ordered macroporous nano-NiFe₂O₄

Abstract

Three-dimensional ordered macroporous (3DOM) Al/NiFe2O4 nanothermite has been obtained by colloidal crystal templating method combined with magnetron sputtering processing. Owing to the superior material properties and unique 3DOM structural characteristics of composite metal oxides, the heat output of the Al/NiFe2O4 nanothermite is up to 2921.7 J g− 1, which is more than the values of Al/NiO and Al/Fe2O3 nanothermites in literature. More importantly, by comparison to the other two nanothermites, the onset temperature of 298.2 °C from Al/NiFe2O4 is remarkably low, which means it can be ignited more easily. Laser ignition experiment indicate that the synthesized Al/NiFe2O4 nanothermite can be easily ignited by laser. In addition, the preparation process is highly compatible with the MEMS technology. These exciting achievements have great potential to expand the scope of nanothermite applications

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

“…The whole ignition duration lasts ca. 200 µs, which is significantly longer than that of the three-dimensionally ordered NiFe 2 O 4 /Al nanothermite film [40]. In addition, the flame height for the CoFe 2 O 4 /Al nanothermite film can reach as high as 10 mm.…”

Manganese molybdate nanoflakes on silicon microchannel plates as novel nano energetic material

“…After cooling to room temperature in air, the product was taken out, rinsed ultrasonically with DI water and ethanol sequentially three times and vacuum dried at 80°C for 6 h. An aluminium film was deposited on the MnMoO 4 /Ni/Si-MCP as fuel by electroplating which is reported in Shi et al . [ 29 ].…”

“…After the precursor solution was transferred to a Teflon-lined stainless steel autoclave liner, the Ni/Si-MCP was added into the solution after immersing in 0.1% Triton X-100 solution for 30 s. The autoclave was then sealed and heated to 140°C for 15 min to produce a deep-brown precipitate containing MnMoO 4 on the surface of the Ni-coated Si-MCP. After cooling to room temperature in air, the product was taken out, rinsed ultrasonically with DI water and ethanol sequentially three times and vacuum dried at 80°C for 6 h. An aluminium film was deposited on the MnMoO 4 /Ni/Si-MCP as fuel by electroplating which is reported in Shi et al [29].…”

Aluminized Energetic Coordination Polymers Constructed from Transition Metal Centers (Co, Ni, and Cu)

“…As we know, nanothermite reaction, namely the redox reaction between nano-Al and metal oxide, has a low onset temperature, which is generally lower than the melting temperature of Al of 660°C [15], and some even as low as 300°C [16][17][18]. In addition, as the nanothermite reaction has a large reaction heat, once excited, the temperature required for the reaction can be maintained to achieve selfsustaining combustion [19][20][21], and even it can also be used as a heat source to ignite other substances in the component [22].…”