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采用稳态法研究了温度、氢气压力、吸氢容量(H/M)和加热功率等条件对LaNiAl储氢材料导热性能的影响。研究结果表明:温度、氢气压力对LaNiAl材料有效热导率有显著影响,随着温度的升高、氢气压力的增大,LaNiAl材料有效热导率初期有降低趋势,后有效热导率趋于恒定;LaNiAl材料的有效热导率随吸氢容量的升高而增大,两相区增速较缓慢,氢化物相区热导率有快速增加;加热功率对LaNiAl有效热导率没有影响,并初步分析了各影响因素对材料导热性能的影响的机制。
The steady state method was used to study the influence of temperature, hydrogen pressure, hydrogen absorption capacity (H / M) and heating power on the thermal conductivity of LaNiAl hydrogen storage material. The results show that temperature and hydrogen pressure have significant effects on the effective thermal conductivity of LaNiAl. With the increase of temperature and pressure of hydrogen, the effective thermal conductivity of LaNiAl decreases initially and the effective thermal conductivity tends to Constant; the thermal conductivity of LaNiAl material increases with the increase of hydrogen absorption capacity, the growth rate of two-phase region is slower and the thermal conductivity of the hydride phase region increases rapidly; the heating power has no effect on the effective thermal conductivity of LaNiAl, The effects of various factors on the thermal conductivity of the material were also analyzed.