采用直接氢化法制备氢化镁(MgH2),运用XRD、SEM、ICP等方法对其结构进行表征.用热分析法(DSC)研究氢化镁对高氯酸铵(AP)热分解过程的影响.结果表明,5%MgH2可分别使AP的低温和高温放热分解峰温降低35.0和44.2 ℃,使AP的DSC表观分解热由0.44增加到1.20 kJ·g-1,表现出对AP热分解过程具有显著的增强促进作用.随着加入量增加,氢化镁对AP热分解的催化促进作用逐渐增强,但当氢化镁含量达到30%时,催化促进作用开始下降.氢化镁对AP热分解的催化促进作用明显强于纯镁粉.探讨了氢化镁增强促进AP热分解过程的作用机制.
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