Synthesis and Thermal Decomposition Behavior of Zr(BHT)2 High Energy Insensitive Combustion Catalyst

CUI Zi-xiang, GAN Jun-zhen, FAN Jie, ZHAO Feng-qi, XUE Yong-qiang, XIAO Li-bai

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Chinese Journal of Explosives & Propellants ›› 2018, Vol. 41 ›› Issue (2) : 165-172. DOI: 10.14077/j.issn.1007-7812.2018.02.011

Synthesis and Thermal Decomposition Behavior of Zr(BHT)2 High Energy Insensitive Combustion Catalyst

  • CUI Zi-xiang, GAN Jun-zhen, FAN Jie, ZHAO Feng-qi, XUE Yong-qiang, XIAO Li-bai
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Abstract

High energy insensitive combustion catalyst Zr(BHT)2 was synthesized by complexing-precipitate method using dichloro ethylene dioxime, dimethylformamide, sodium azide, hydroxylamine hydrochloride and zirconium nitrate as raw materials. The thermal decomposition properties of Zr(BHT)2 were studied by differential scanning calorimetry (DSC) and thermogravimetry (TG) at different heating rates. The apparent activation energies (EK and EO) and pre-exponential constant (Ak) were calculated by Ozawa’s method and Kissinger’s method. The kinetic parameters and mechanism function of thermal decomposition, thermal explosion temperature and thermodynamic parameters were obtained, and the impact sensitivity and friction sensitivity were measured. The results show that the apparent activation energies of Zr(BHT)2 by Ozawa and Kissinger’s method were 150.51 and 152.15 kJ/mol, respectively, and the thermal decomposition is in accordance with Avrami-Erofeev equation. The self-accelerating decomposition temperature and the critical temperature of thermal explosion are 497.63 and 530.71 K, respectively. The free energy of activation of thermal decomposition reaction (ΔG≠) is 122.04 kJ/mol, the enthalpy of activation (ΔH≠) is 147.88 kJ/mol, and entropy of activation (ΔS≠) is 50.27 J/mol. The sensitivity test results also show that Zr(BHT)2 combustion catalyst is insensitive to impact and friction, and the safety is relatively high.

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combustion catalyst / Zr (BHT)2 / high energy insensitive / kinetics / thermodynamics / complexing-precipitate method

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CUI Zi-xiang, GAN Jun-zhen, FAN Jie, ZHAO Feng-qi, XUE Yong-qiang, XIAO Li-bai. Synthesis and Thermal Decomposition Behavior of Zr(BHT)2 High Energy Insensitive Combustion Catalyst. Chinese Journal of Explosives & Propellants. 2018, 41(2): 165-172 https://doi.org/10.14077/j.issn.1007-7812.2018.02.011

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