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首页> 外文期刊>Nanotechnology >Thermophysical properties of hydrogenated vanadium-doped magnesium porous nanostructures
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Thermophysical properties of hydrogenated vanadium-doped magnesium porous nanostructures

机译：氢化钒掺杂镁多孔纳米结构的热物理性质

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摘要

Vanadium-doped magnesium nanostructures are fabricated by an oblique angle co-deposition method and hydrogenated/dehydrogenated for 21 cycles. The effective thermal conductivity and density of the MgH2 nanostructures is measured by using a photothermal system. A multilayer physical model is used to fit the experimental data. Our results show that the effective thermal conductivity of the hydrogenated V-doped MgH2 nanostructures is in the range of 1.16-2.40 W m(-1) K-1 and the density falls in the range of 878-1320 kg m(-3). The measured density agrees well with the estimation from electron micrograph observation. Variation in the measurements indicates strong nonuniformity of the sample structure and thickness. Based on the measured density and effective thermal conductivity, the thermal conductivity of bulk V-doped Mg hydrides is also evaluated using Maxwell's correlation.
机译：钒掺杂的镁纳米结构是通过斜角共沉积方法制造的，并进行了21个周期的氢化/脱氢。通过使用光热系统测量MgH2纳米结构的有效导热率和密度。多层物理模型用于拟合实验数据。我们的结果表明，氢化的V掺杂的MgH2纳米结构的有效导热系数在1.16-2.40 W m（-1）K-1范围内，密度在878-1320 kg m（-3）范围内。测得的密度与电子显微镜观察的估计非常吻合。测量值的变化表明样品结构和厚度的强烈不均匀性。基于测得的密度和有效导热率，还使用麦克斯韦相关性评估了掺V的Mg氢化物的导热率。

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