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用X射线衍射(XRD)、热重(TG)分析、差示扫描量热法(DSC)、氧弹量热分析等方法对储氢合金的相结构、热性能和其他基本性能进行了测定,并对不同温度下储氢合金在干燥空气中的储存稳定性进行了表征。结果表明,Al的含量不改变储氢合金中H的储存形式;储氢合金在干燥空气中有良好的储存稳定性;储氢合金A20、A30的放氢温度分别为362.04、360.10℃,比Mg2NiH4的放氢温度高出了约70℃,且储氢合金的密度、耗氧量与Al粉相当,燃烧热值高于Al粉,故表明储氢合金可作为推进剂用的高能燃烧剂。
The phase structure, thermal properties and other basic properties of the hydrogen storage alloy were measured by X-ray diffraction (XRD), thermogravimetric analysis (TG), differential scanning calorimetry (DSC) The storage stability of hydrogen storage alloys in dry air at different temperatures was also characterized. The results show that the content of Al does not change the storage form of H in the hydrogen storage alloy. The hydrogen storage alloys have good storage stability in dry air. The hydrogen storage temperatures of the hydrogen storage alloys A20 and A30 are 362.04 and 360.10 ℃ respectively, which are higher than those of Mg2NiH4 Hydrogen release temperature higher than about 70 ℃, and the hydrogen storage alloy density, oxygen consumption and Al powder equivalent, the combustion calorific value higher than the Al powder, so that hydrogen storage alloys can be used as a propellant high-energy combustion agent.