<i>α</i>→<i>β</i> Phase Transition Characteristics of High-Energy and Low-Sensitivity Explosive FOX-7

GU Xiaofei; FAN Siqi; LI Rujiang; LI Hongzhen

doi:10.11858/gywlxb.20200653

Volume 35 Issue 3

Jun 2021

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Chinese Journal of High Pressure Physics > 2021 > 35(3): 031301.

GU Xiaofei, FAN Siqi, LI Rujiang, LI Hongzhen. α→β Phase Transition Characteristics of High-Energy and Low-Sensitivity Explosive FOX-7[J]. Chinese Journal of High Pressure Physics, 2021, 35(3): 031301. doi: 10.11858/gywlxb.20200653

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GU Xiaofei, FAN Siqi, LI Rujiang, LI Hongzhen. α→β Phase Transition Characteristics of High-Energy and Low-Sensitivity Explosive FOX-7[J]. Chinese Journal of High Pressure Physics, 2021, 35(3): 031301. doi: 10.11858/gywlxb.20200653

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α→β Phase Transition Characteristics of High-Energy and Low-Sensitivity Explosive FOX-7

doi: 10.11858/gywlxb.20200653

GU Xiaofei^{1, 2
,},
FAN Siqi¹,
LI Rujiang²,
LI Hongzhen^{1,*
,
,}

1.
Institute of Chemical Materials, CAEP, Mianyang 621999, Sichuan, China
2.
School of Environmental and Safety Engineering, North University of China, Taiyuan 030051, Shanxi, China

Received Date: 10 Dec 2020
Rev Recd Date: 30 Dec 2020

Abstract

Abstract

In order to understand the specific process of α→β phase transition in FOX-7, some experimental methods are used to analyze the α→β phase transition, such as scanning electron microscope, THMSG600 heating stage instrument, and micro-confocal Raman spectrum. The changes of the crystal morphology during the α→β phase transition in FOX-7 are studied at the overall and individual levels of the crystal in detail. At the same time, the effects of different factors such as heating rate, crystal morphology, and crystal defects of α→β phase transition are explored. The results show that during the α→β phase transition, cracks and breakages appear in the crystals, and the crystals become opaque. Meanwhile, it was found that the crystal size, heating rate, and crystal morphologies have effects on the phase transition in different degrees. It is relatively more prone to phase change in the case of larger massive crystals under a slower heating rate. Besides, the phase transition of α→β is a continuous process, and it gradually diffuses from a certain defect to the entire crystal. For this reason, in-situ polymerization of dopamine can be used to coat FOX-7 crystals to achieve the purpose of inhibiting the α→β phase transition.
- FOX-7,
- crystal,
- α→β phase transition,
- Raman spectra,
- dopamine-coated

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References(26)

References

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α→β Phase Transition Characteristics of High-Energy and Low-Sensitivity Explosive FOX-7

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