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Spark Desensitization of Nanothermites via the Addition of Highly Electro-Conductive Carbon Particles

NS3E Laboratory, UMR 3208 ISL/CNRS/UNISTRA, French-German Research Institute of Saint-Louis (ISL), 5 rue du General Cassagnou, BP70034, 68301 Saint-Louis, France
Received: 23 May 2022 / Revised: 14 June 2022 / Accepted: 15 June 2022 / Published: 23 June 2022
In the past decade, the formulation of spark-desensitized nanothermites has considerably advanced, making them safe to handle. When ignited, these materials reveal impressive properties such as high temperatures (>1000 °C), intense heat releases (>kJ/cm3), and sometimes gas generation. Unfortunately, these energetic systems are systematically characterized by an extreme sensitivity to electrostatic discharges, which can cause accidental ignitions during preparation, handling, and transport. The present study examines the electrostatic discharge sensitivity response of an Al/WO3 energetic formulation doped with highly conductive carbon nanoparticles (Ketjenblack EC600JD). The results showed an increased threshold from <0.14 mJ to almost 40 mJ with 18.80 vol. % of KB EC600JD in the energetic mixture. The energetic material was also desensitized to friction stress with a threshold greater than 360 N, in contrast to a value of <4.9 N for an un-doped Al/WO3 energetic composite material. The reactive performance of the system (w/o Ketjenblack additive) was verified in open medium by means of an optical igniter. The heat release was determined by a calorimetric bomb and a decrease of 50% was recorded for the carbon-doped energetic system compared to the pristine Al/WO3 composition. View Full-Text
Keywords: spark sensitivity; high-conductive carbon; nanothermites; desensitization spark sensitivity; high-conductive carbon; nanothermites; desensitization
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MDPI and ACS Style

Gibot, P. Spark Desensitization of Nanothermites via the Addition of Highly Electro-Conductive Carbon Particles. C 2022, 8, 35. https://doi.org/10.3390/c8030035

AMA Style

Gibot P. Spark Desensitization of Nanothermites via the Addition of Highly Electro-Conductive Carbon Particles. C. 2022; 8(3):35. https://doi.org/10.3390/c8030035

Chicago/Turabian Style

Gibot, Pierre. 2022. "Spark Desensitization of Nanothermites via the Addition of Highly Electro-Conductive Carbon Particles" C 8, no. 3: 35. https://doi.org/10.3390/c8030035

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