自蔓延高温合成钒基固溶体贮氢合金的理论研究

Theoretical Research of V-based Solid Solution Storage Hydrogen Alloys by self Propagating High Temperature Synthesis

提出采用自蔓延高温合成法制备钒基固溶体贮氢合金的新工艺.计算知NH4VO3-TiO2-Cr2O3-Ni-Al反应体系的绝热温度(Tad)为1 889.27 K,单位质量反应热为-2.67 kJ/g;对NH4VO3-TiO2-Cr2O3-Ni-Al反应体系的相关反应进行了热力学分析,表明体系生成V+Ti+Cr+Al2O3的趋势最大,生成物最稳定.确定了采用自蔓延模式的可行性.

A new technique named self propagating high temperature synthesis was proposed to prepare V-based solid so- lution storage hydrogen alloys. The adiabatic temperature （Tad） and reaction heat per unit mass in NH4 VO3-TiO2- Cr2 O3- Ni-Al reaction system was calculated to be 1 889.27 K and -2.67 kJ/g, through which the thermodynamic data of correlative reactions were analyzed. It produces V＋Ti＋Cr＋ Al2O3 more easily and determines the feasibility of the self propagating high temperature synthesis reaction consequently.