低温プラズマ誘起水素化によるマグネシウムナノ粒子の燃焼特性向上
This study presents a two-step aerosol synthesis route for magnesium hydride nanoparticles, combining thermal evaporation with subsequent in-flight exposure to a hydrogen-rich low-temperature plasma. Atomic hydrogen produced by the plasma diffuses into the magnesium crystal lattice, generating a substantial MgH phase fraction. Combustion experiments using potassium perchlorate as an oxidizer demonstrated that the ignition temperature of hydrogenated Mg nanoparticles was approximately 200°C lower than that of unhydrogenated counterparts. This reduction is attributed to hydrogen release from the fuel accelerating the onset of combustion. The study further identifies that balancing molecular hydrogen dissociation against nanoparticle heating is critical during production to prevent premature hydrogen desorption and achieve adequate hydrogenation levels. Potential applications include solid-fuel additives for rocket propellants and pyrotechnic formulations.
Low-temperature plasma dissociates molecular hydrogen into atomic hydrogen, which diffuses into the magnesium lattice to form MgH. During combustion, hydrogen release from the hydride phase accelerates ignition onset, lowering the ignition temperature by approximately 200°C compared to non-hydrogenated magnesium.
The delivery route is not clearly identifiable from this paper. For hydrogen intake, inhalation is the most efficient route; inhalation, however, carries explosion risk (empirical LFL of 10%; high-concentration devices are not recommended).
See also:
https://h2-papers.org/en/papers/37899592