Authors: K.S. Martirosyan, L. Wang, D. Luss
Affilation: University of Houston, United States
Pages: 137 - 140
Keywords: nanoenergetic materials, Al nanoparticles, iodine pentoxide, pressure discharge
This report presents a novel nanoenergetic system based on iodine oxide and aluminum thermite reaction and the study of their gas generation and thermal wave behavior during the detonation. The ignition of homogeneous mixture of iodine pentoxide (78 wt.%) and aluminum nanoparticles (22 wt.%) was occurs at the range of 605-620 °C and generated a high discharge pressure (~11 MPa) and a shock wave with a velocity of ~2000 m/s. The pressure rose very rapidly to a peak value for duration of ~ 4 us and dP/dt of up to 2750 GPa/s. The ignition temperature in this system exceeds by at least 100 °C those of conventional thermite systems. This indicates that the Al/I2O5 nano mixtures can be safely stored and handled. The activation energy for reaction 3I2O5 + 10Al = 5Al2O3 + 6I in nanoscale was estimated to be 152 kJ/mol. The maximum pressure x volume PV-value obtained at m=0.5g was ~3.8 kPa.m3 compared well for reported highest Bi2O3/Al system for the same sample mass. This behavior feature of Al/I2O5 system shows a great potential for using as NM and NGG for high energy storage applications.
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