PREPARATION AND PROPERTIES OF NANO-AL/MOO3 THERMITE
Кілт сөздер:
MoO3 nanobelt,, thermite,, self-assembly,, high-exothermicАңдатпа
MoO3 nanobelts were prepared by a facile hydrothermal method. The as-synthesized MoO3 nanobelts were used to integrate with nano-Al powder through two different approaches, .mixing nano-Al with MoO3 nanobelts ultrasonicly and combining nano-Al with MoO3 self-assembly. The physical-chemical properties of the as prepared samples were carefully characterized by SEM, TEM, XRD, TGA/ DSC and drop weight impact test. The results show that the morphology of MoO3 is highly influenced by the addi-tive sequence and the concentration of ammonium paramolybdate. The onset oxidation temperature of self-assembled nano-Al/MoO3 is 478.5 ℃. Otherwise, the onset oxidation temperatures of nano Al pow-der, nano-Al/hydrothermal MoO3 and nano Al/referenced Fe2O3 prepared by ultrasonic method are 540.8 ℃, 484.2 ℃ and 514.8 ℃ respectively. And the total exothermic heats of self-assembled nano-Al/MoO3 in the temperature of TG experiments are about 6696.0 J/g, and 801.6 J/g, 577.4 J/g and 4080.2 J/g higher than that of nano-Al/commercial MoO3, nano-Al/hydrothermal MoO3 and nano-Al/referenced Fe2O3.
Әдебиеттер тізімі
(1) Bazyn, T., Lynch, P., Krier, H., et al. (2010). Combustion measurements of fuel-rich aluminum and molybdenum oxide nano-composite mixtures. Propellants, Explosives, Pyrotechnics, 35, 93-99.
(2) Xu, D., Yang, Y., Cheng, H., et al. (2012). Integration of nano-Al with Co3O4 nanorods to realize high-exothermic core-shell nanoenergetic materials on a silicon substrate. Combustion and Flame, 159, 2202-2209.
