碳酸铅催化二硝酰胺铵的燃烧特性和热分解行为研究

通过燃速测定、差示扫描量热法（DSC）和热失重法（TG）研究了碳酸铅（PbCO3）对二硝酰胺铵（ADN）热分解和燃烧性能的影响。在3～12MPa范围内，ADN＋5％ PbCO3＋0．2％石蜡的燃速高于ADN＋0．2％石蜡，PbCO3使ADN＋0．2％石蜡的麦撤燃烧特性消失。TG和DSC分析表明，PbCO3可以降低ADN的初始热分解温度；ADN＋5％ PbCO3与纯ADN相同失重时对应两者的温度之差随质量损失增加而减小。动力学分析显示，加入5％PbCO3后，ADN热分解表观活化能降低。分析认为，ADN＋5％PbCO3＋0．2％石蜡和ADN＋0．2％石蜡燃烧特性与其表面的ADN熔化层的特征存在关联。

Combustion Characteristics and Thermal Decomposition Behavior of Ammonium Dinitramide Catalyzed by Lead Carbonate

The effect of lead carbonate (PbCO_3) on the combustion characteristics and thermal decomposition behavior of ammonium dinitramide (ADN) is investigated by burning rate measurement, DSC and TG techniques. Results show that the burning rate of ADN+5% PbCO_3+0.2% paraffin system is higher than that of ADN+0.2% paraffin system in the pressure range of 3-12 MPa, and PbCO_3 enables mesa combustion effect of ADN+0.2% paraffin system to disappear. TG and DSC curves of ADN and ADN+ 5% PbCO_3 system indicate that the initial decomposition temperature of ADN can be decreased by the addition of PbCO_3. Kinetic analysis for DSC data show that the apparent activation energy of thermal decomposition of ADN decreases when 5% PbCO_3 is added into ADN. Moreover, both combustion characteristics and surface-melting layers of ADN mixtures are considered to be correlative.