Hot Bridge-Wire Ignition of Nanocomposite Aluminum Thermite Synthesized Using Sol-Gel-Derived Aerogel with Tailored Properties for Enhanced Reactivity and Reduced Sensitivity

Ilyes Ghedjatti (), Shiwei Yuan and Haixing Wang
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Ilyes Ghedjatti: Aerospace Propulsion Laboratory, School of Astronautics, Beihang University, Beijing 100191, China
Shiwei Yuan: Aerospace Propulsion Laboratory, School of Astronautics, Beihang University, Beijing 100191, China
Haixing Wang: Aerospace Propulsion Laboratory, School of Astronautics, Beihang University, Beijing 100191, China

Energies, 2024, vol. 17, issue 10, 1-37

Abstract: The development of nano-energetic materials has significantly advanced, leading to enhanced properties and novel applications in areas such as aerospace, defense, energy storage, and automobile. This research aims to engineer multi-dimensional nano-energetic material systems with precise control over energy release rates, spatial distribution, and temporal and pressure history. In this context, sol–gel processing has been explored for the manufacture of nanocomposite aluminum thermites using aerogels. The goal is to produce nano-thermites (Al/Fe 2 O 3 ) with fast energy release rates that are insensitive to unintended initiation while demonstrating the potential of sol–gel-derived aerogels in terms of versatility, tailored properties, and compatibility. The findings provide insightful conclusions on the influence of factors such as secondary oxidizers (KClO 3 ) and dispersants (n-hexane and acetone) on the reaction kinetics and the sensitivity, playing crucial roles in determining reactivity and combustion performance. In tandem, ignition systems contribute significantly in terms of a high degree of reliability and speed. However, the advantages of using nano-thermites combined with hot bridge-wire systems in terms of ignition and combustion efficiency for potential, practical applications are not well-documented in the literature. Thus, this research also highlights the practicality along with safety and simplicity of use, making nano-Al/Fe 2 O 3 -KClO 3 in combination with hot bridge-wire ignition a suitable choice for experimental purposes and beyond.

Keywords: sol–gel method; aerogel-based nano-thermite; secondary oxidizer; dispersant; hot bridge-wire; ignition efficiency; combustion performance; reaction kinetics; sensitivity thresholds (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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