In order to initiate detonation of fuelair explosive (FAE) chemically,some formulations (abbr.as FAE-Ⅲ) were made by using different forms of aluminum powder mixed with fuels,such as epoxy propane,nitromethane and isoprene,and with azidoalkane or triethylaluminum (TEA). It is found that after 40 days storage at 50℃ the activity of both spherical and flake aluminum powder,sealed in the mixture of epoxy propane,isoprene and nitromethane,decreased 37.0% and 59.4%,while the activity of the said aluminum powder in the mixture with azidoalkane or TEA only little reduced at the same conditions. These results indicate that the later two compounds are promising to be used as ingredients of FAE-Ⅲ to increase their performance.