【摘要】 采用紧耦合气雾化法制备了一系列Al-Li合金粉体,利用DSC研究了它们对高氯酸铵(AP)热分解的影响。结果表明Al-Li抑制AP的低温分解,但促进AP的高温分解,使得AP的两个分解峰相互靠近并结合成一个集中的放热峰。当锂含量达10wt%时,合金能够使AP的高温分解峰降低约80℃,表观分解热增加至1046. 2 J/g,并使混合物的高温分解活化能由纯AP的139. 4 kJ/mol降低至76. 5 kJ/mol。此外,对分解产物进行分析,发现Al-10Li合金粉体能够有效减少Cl~-的排放。更多还原

【Abstract】 A series of Al-Li alloy powders were prepared by close-coupled gas atomization. DSC was introduced to study the effect of gas atomized Al-Li alloy on the decomposition of AP. The results showed that the Al-Li alloy inhibited the low temperature decomposition of AP and promoted the high temperature decomposition,so that the two decomposition peaks of AP got close and combined into a concentrated exothermic peak. When the Li content reached 10 wt%,the alloy could significantly reduce the high temperature decomposition of AP by about 80 ℃. Besides,the apparent decomposition heat was increased to 1046 J/g. Moreover,the activation energy of high temperature decomposition was reduced from139. 4 kJ/mol to 76. 5 kJ/mol. In addition,analysis of the decomposition products revealed that Al-10 Li alloy powder can effectively reduce Cl~-emissions.更多还原