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首页> 外文期刊>RSC Advances >Study of thermal stability of p-type skutterudites DD0.7Fe3CoSb12 by Knudsen effusion mass spectrometry
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Study of thermal stability of p-type skutterudites DD0.7Fe3CoSb12 by Knudsen effusion mass spectrometry

机译：Knudsen扩散质谱法研究p型方钴矿DD0.7Fe3CoSb12的热稳定性

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摘要

The temperature and phase stability of p-type skutterudites, DD _(0.7) Fe _(3) CoSb _(12) , manufactured via various preparation techniques, all exhibiting a high ZT -level, have been studied by means of thermal analysis and Knudsen effusion mass spectrometry. The results from phase transformation measurements and characteristics of the evaporation of antimony, as the volatile element, supported by microstructure observations and by diffusion profiles are summarized and discussed in view of a full understanding of the degradation processes and knowledge of the long term operation stability of the bulk and nano-structured thermoelectrics studied. It was found out that the antimony evaporation is a complex diffusion kinetic process resulting in a stable Sb level dependent on the preparation route. The studied p-type skutterudites, DD _(0.7) Fe _(3) CoSb _(12) , have proven their long term stability in thermoelectric devices at a maximum operation temperature of 600 °C. Complementary data on the structural, physical and mechanical properties of the materials are presented as well.
机译：通过热分析和方法研究了通过各种制备技术制备的p型方钴矿DD _（0.7）Fe _（3）CoSb _（12）的温度和相稳定性。努森渗流质谱。总结和讨论了相变测量结果和作为挥发性元素的锑蒸发特征的结果，这些观察结果得到了微观结构观察和扩散曲线的支持，并充分了解了其降解过程并了解了其长期运行稳定性。研究了本体和纳米结构热电学。已发现锑蒸发是复杂的扩散动力学过程，其取决于制备途径导致稳定的Sb水平。所研究的p型方钴矿DD _（0.7）Fe _（3）CoSb _（12）已证明其在最高工作温度为600°C的热电设备中具有长期稳定性。还提供了有关材料的结构，物理和机械性能的补充数据。

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