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通过对反应体系的绝热温度计算及热力学分析,讨论了V2O5 -TiO2 -Al体系自蔓延反应进行的可行性。自蔓延高温合成了V3TiNi0. 56Al0. 2贮氢合金,利用X射线衍射分析(XRD)、能谱分析、扫描电镜(SEM)和金相显微镜等手段对产物进行了研究。结果表明,用自蔓延高温合成法与用其他方法制备的V3TiNi0. 56Al0. 2贮氢合金的相结构一样。PCT曲线表明该合金具有一定的吸放氢性能,饱和吸氢量为0. 092L/g,略低于其它方法制备的V3TiNi0. 56Al0. 2的饱和吸氢容量。
By calculating the adiabatic temperature and the thermodynamic analysis of the reaction system, the feasibility of self-propagating V2O5-TiO2-Al system was discussed. The self-propagating high temperature synthesis V3TiNi0 56Al0.2 hydrogen storage alloy, the use of X-ray diffraction analysis (XRD), energy spectrum analysis, scanning electron microscopy (SEM) and metallographic microscope and other means of the product were studied. The results show that the self-propagating high temperature synthesis method and other methods prepared V3TiNi0. 56Al0. 2 hydrogen storage alloy phase structure. PCT curve shows that the alloy has a certain hydrogen absorption and desorption hydrogen saturation hydrogen absorption capacity of 0. 092L / g, slightly lower than the other methods prepared V3TiNi0 56Al0.2 saturation hydrogen absorption capacity.