Phase diagram of ammonium nitrate

18th APS-SCCM; 24th AIRAPT

Dunuwille, M.^1 ; Yoo, C.S.^1

Department of Chemistry, Institute for Shock Physics, Washington State University, Pullman

WA

99164, United States^1

关键词: Ammonium nitrate;    Diamond-anvil cell;    Energetic properties;    High-pressure and temperatures;    Improvised explosive devices;    Micro Raman Spectroscopy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/5/052011/pdf
DOI  :  10.1088/1742-6596/500/5/052011

来源: IOP

【 摘 要 】

Ammonium Nitrate (AN) has often subjected to uses in improvised explosive devices, due to its wide availability as a fertilizer and its capability of becoming explosive with slight additions of organic and inorganic compounds. Yet, the origin of enhanced energetic properties of impure AN (or AN mixtures) is neither chemically unique nor well understood -resulting in rather catastrophic disasters in the past1and thereby a significant burden on safety in using ammonium nitrates even today. To remedy this situation, we have carried out an extensive study to investigate the phase stability of AN at high pressure and temperature, using diamond anvil cells and micro-Raman spectroscopy. The present results confirm the recently proposed phase IV-to-IV' transition above 17 GPa2and provide new constraints for the melting and phase diagram of AN to 40 GPa and 400 °C.