Preparation and properties of nano-Al/MoO3 thermite
Keywords:
MoO3 nanobelt, Thermite, Self-assembly, High-exothermicAbstract
MoO3 nanobelts were prepared by a facile hydrothermal method. The as synthesized MoO3 nanobelts were used to integrate with nano-Al powder through two diff erent approaches, mixing nano-Al with MoO3 nanobelts ultrasonicly and combining nano- Al with MoO3 self-assembly. The physical-chemical properties of the asprepared 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 infl uenced by the additive 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 powder, 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.
References
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