非爆炸且不可还原农用硝酸铵的热稳定性评估

Thermal Stability Evaluation of Non-explosive and Irrestorable Fertilizer-grade Ammonium Nitrate

介绍了一种测试含能材料热稳定性的新方法———加速度量热仪 ,并用此法研究了硝酸铵和非爆炸且不可还原农用硝酸铵的热分解过程 ,得到了绝热分解温度与压力随时间的变化、自加热速率与分解压力随温度的变化曲线 ,计算了分解动力学参数表观活化能和指前因子 ,讨论了放热反应系统的热惰性因子对测试结果的影响 ,表明非爆炸且不可还原农用硝酸铵具有良好的热稳定性。

A new method using accelerating rate calorimeter (ARC) was introduced in this paper to evaluate the thermal stability of energetic materials. By the method, the adiabatic decompositions of ammonium nitrate (AN) and non-explosive and irrestorable fertilizer-grade ammonium nitrate (NEIFAN) were investigated. The curves of thermal decomposition temperature and pressure versus time, self-heating rate and pressure versus temperature were obtained. The kinetic parameters such as apparent activation energy and pre-exponential factor were calculated. The effects of thermal inertia factor on the results of measurement of the adiabatic ARC are discussed. It was indicated that NEIFAN has better thermal stability and safety. At the same time, it can be shown that the elimination of NEIFAN explosive characteristic is due to the improvement on its thermal stability.[