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Crystal Structure, Thermal Properties of Hydrazinium 3,5-Dinitroamino-1,2,4-triazole and Application in CMDB Propellant
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Xi’an Modern Chemistry Research Institute, Xi′an 710065, China

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    Abstract:

    The single crystal of hydrazinium 3,5-dinitroamino-1,2,4-triazole (HDNAT) was cultivated by slow evaporation from solvent of methanol/water, and its crystal structure was determined by X-ray singal-crystal diffractometer. The crystal structure analysis indicates that HDNAT belongs to monoclinic system with space group P2(1), and the crystal parameters are a = 0.35976(12) nm,b = 0.9348(3) nm,c = 1.1833(4) nm,V = 0.393.9(2) nm3Z = 2,Dc = 1.91 g·cm-3μ = 0.170 mm-1F(000)=230. The thermal behavior of HDNAT was studied by TG-DTG. The decomposition peak of HDNAT is 193.17℃ (DSC), and it decomposes at solid state. The composite modified double-base (CMDB) propellant formulation based on HDNAT was designed and prepared, and its energy characteristics such as explosion, specific volume, density, characteristic velocity, and specific impulse and combustion performances were tested. For HDNAT-based CMDB propellant formulation, the tested explosion is 6042 kJ·kg-1, specific volume is 638 L·kg-1, density is 1.767 g·cm-3, characteristic velocity is 1592.3 m·s-1. The study of combustion performances of Φ50 mm engine show that it has stable performances at pressure of 15 MPa, the specific impulse is 250.91 s. Compared with RDX-CMDB propellant, the burning rate of HDNAT-based CMDB propellant increases by 18.8%, and the pressure exponent in partial pressure range is above 0.4.

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周诚,李吉祯,李祥志,等.3,5-二硝氨基-1,2,4-三唑肼盐晶体结构、热性能及在CMDB推进剂中的应用[J].含能材料,2020,28(12):1163-1169.
ZHOU Cheng, LI Ji-zhen, LI Xiang-zhi, et al. Crystal Structure, Thermal Properties of Hydrazinium 3,5-Dinitroamino-1,2,4-triazole and Application in CMDB Propellant[J]. Chinese Journal of Energetic Materials,2020,28(12):1163-1169.

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History
  • Received:March 26,2020
  • Revised:November 16,2020
  • Adopted:October 09,2020
  • Online: October 16,2020
  • Published: December 25,2020