碳酸铅催化二硝酰胺铵的燃烧特性和热分解行为研究

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

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%石蜡的麦撒燃烧特性消失。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。

The effect of lead carbonate （ PbCO3 ） on the combustion charscteristics 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% PbCO3 ＋ 0.2% paraffin system is higher than that of ADN ＋ 0.2% paraffin system in the pressure range of 3 ～ 12 MPa, and PbCO3 enables mesa combustion effect of ADN ＋0.2% paraffin system to disappear, TG and DSC curves of ADN and ADN ＋ 5% PbCO3 system indicate that the initial decomposition temperature of ADN can be decreased by the addition of PbCO3. Kinetic analysis for DSC data show that the apparent activation energy of thermal decomposition of ADN decreases when 5% PbCO3 is added into ADN. Moreover, both combustion characteristics and surface-melting layers of ADN mixtures are considered to be correlative.