Volume 31 Issue 2
Apr 2017
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GONG Yue, HE Jie, YAN Shi-Long, CHENG Yang-Fan. Effect of Aluminum Particle Size on Thermal Decomposition Characteristics of Emulsion Matrix[J]. Chinese Journal of High Pressure Physics, 2017, 31(2): 148-154. doi: 10.11858/gywlxb.2017.02.006
Citation: GONG Yue, HE Jie, YAN Shi-Long, CHENG Yang-Fan. Effect of Aluminum Particle Size on Thermal Decomposition Characteristics of Emulsion Matrix[J]. Chinese Journal of High Pressure Physics, 2017, 31(2): 148-154. doi: 10.11858/gywlxb.2017.02.006

Effect of Aluminum Particle Size on Thermal Decomposition Characteristics of Emulsion Matrix

doi: 10.11858/gywlxb.2017.02.006
  • Received Date: 12 Apr 2016
  • Rev Recd Date: 13 Sep 2016
  • Adding aluminum powder into emulsion explosive can increase its explosion heat and work capability, but also raise its heat sensitivity.In order to study the effect of the aluminum particle size on the thermal stability of the emulsion matrix, the thermal decomposition characteristics of the emulsion matrix containing aluminum powders of different particle sizes were examined using differential scanning calorimetry (DSC) and thermal gravimetric (TG) methods at various heating rates, and the kinetic parameters of thermal decomposition were obtained.The results show that the addition of aluminum powder reduces the peak temperature, the activation energy and thermal stability.Moreover, this trend becomes more obvious with the decrease of the aluminum particle size.Compared with the case of the emulsion explosive without the powder addition, the aluminum powders with different particle sizes have no effect on the thermal decomposition mechanism functions of the emulsion matrix in the scope of experiments and they are controlled by nucleation and growth mechanism and the mechanism function could be described with Mample principle with a reaction order of n=1.The results can provide theoretical guidance for corresponding thermal stability research of aluminized emulsion explosive.

     

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