Abstract
In this paper, the ignition of samples pressed from nanodispersed iron powder with nanosized particles, stored after manufacturing for four years, is studied. The ignition temperature of samples pressed from an initially pyrophoric powder with the average particle diameter of 85 nm was about 105°C. As a result of the oxidation and agglomeration of the powder during long-term storage in air, the ignition temperature increased to 225°C. The ignition temperatures of nanodispersed iron powder and iron powders with average particle sizes of 3, 4.6, and 55 µm are compared. The possibility of partial restoration of the reactivity of such iron powders after their annealing in argon is shown.
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ACKNOWLEDGMENTS
The authors thank V.A. Zelensky and A.B. Ankudinov for providing nanosized iron powders for research.
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Vadchenko, S.G., Alymov, M.I. Change in the Ignition Parameters of Nanodispersed Iron Powders During Long-Term Storage. Russ. J. Phys. Chem. B 16, 236–241 (2022). https://doi.org/10.1134/S1990793122020130
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DOI: https://doi.org/10.1134/S1990793122020130