The investigation of the ignition mechanism of shocked 98 wt% hydrogen peroxide based on transmissivity measurement

Abstract

The behavior of 98 wt% hydrogen peroxide in delay period under shock loading was researched by optical transmissivity in-situ detection system. The time evolution of the transmissivity of 98 wt% hydrogen peroxide in the delay period is firstly presented. The experimental phenomenon shows that when the shock pressure in hydrogen peroxide reaches the ignition level, a large number of clusters will be produced inside the hydrogen peroxide. The formation of new clusters provides the reserve of energy for ignition. Those clusters formed by hydrogen peroxide in the delay period may act as hot spots, which leads the homogeneous explosives to reach the heterogeneous state before ignition. This conclusion is reasonable for revealing the ignition mechanism of homogeneous explosive. The particle behavior in the delay period gives us a new method to detect the ignition pressure. The experiments also confirm that the ignition pressure of 98 wt% hydrogen peroxide is just between 9.3 GPa and 12.1 GPa.

Initial Decomposition Mechanism of H2O2 at High Temperature and Pressure

“…However, the reaction of H 2 O 2 was not completed at this time, and it was proposed that pressure was the ignition threshold pressure of H 2 O 2 . Compared with previous studies, Liao et al [17] adopted shock loading and optical transmittance detection techniques to confirm the ignition threshold pressure within the range of 9.3-12.1 GPa, and the threshold range of ignition pressure is wider. In addition, Cheng et al [16] also used shock loading and Raman spectroscopy measurement technology to find that 98% of H 2 O 2 did not produce O 2 when the pressure was 11.2-11.3 GPa.…”