储氢合金燃烧剂基本性能研究

Basic performance of hydrogen storage alloy combustion agent

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。

Phase structure,thermal properties and other basic properties of hydrogen storage alloy were determined by XRD, TG,DSC and oxygen bomb analysis. It＇s storage stability in dry air was characterized at different temperatures. The results show that the storing method of hydrogen in hydrogen storage alloy doesnt change with AI content. Hydrogen storage alloy has good storage stability in dry air. Dehydriding temperature of A20 and A30 are 362.04 ℃ and 360.10 ℃ respectively,which are 70 ℃ higher than Mg2 NiH4. Density and oxygen consumption of hydrogen storage alloy are consistent with Al powder, whereas combustion heat of hydrogen storage alloy is higher than Al powder. The results show that hydrogen storage alloy can be used in propellants as high en- ergy combustion agent.