包覆AlH3的多尺度热分析比较OA

To enhance the stability of aluminum hydride(AlH3)against external energy stimuli,its surface was modified using six coating materials from three categories.Successful coating was confirmed by scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),and X-ray diffraction(XRD).A multi-scale thermal stability evaluation system was estab-lished to simulate thermal stimuli across different time scales and energy intensities:vacuum outgassing tests and differential scanning calorimetry(DSC)were employed to assess the response to long-term weak thermal stimulation and programmed strong thermal stimulation,respectively,while electrostatic spark sensitivity tests evaluated safety under instantaneous electro-thermal stimulation.The results showed that the graphene oxide(GO)coating exhibited the most balanced performance,im-proving long-term hydrogen release inhibition,increasing the apparent decomposition activation energy by 12.1 kJ/mol accord-ing to Kissinger analysis,and enhancing the 50％ignition energy(E50)by 230.8％.In contrast,glycidyl azide polymer(GAP)and stearic acid(SA)coatings showed limited stabilization because their apparent activation energies decreased and their E50 values remained close to pristine AlH3,underscoring the necessity of comprehensive evaluation.Therefore,GO is i-dentified as the most promising coating material for stabilizing AlH3 in energetic applications.