Structural Investigation and Indium Substitution in the Thermoelectric Mn2.7Cr0.3Si4Al2-xInx Series
Structural Investigation and Indium Substitution in the Thermoelectric Mn2.7Cr0.3Si4Al2-xInx Series
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热电 Mn2.7Cr0.3Si4Al2-xInx 系列中的结构研究和铟替代
DOI：
10.1007/s11664-016-4365-0
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发表时间：
2016
影响因子：
2.1
通讯作者：
R. O. Suzuki
中科院分区：
文献类型：
--
作者：
T. Barbier;E. Combe;R. Funahashi;T. Takeuchi;M. Kubouchi;Y. Miyazaki;E. Guilmeau;R. O. Suzuki
在最近发现了很有前景的Mn2.7Cr0.3Si4Al2热电化合物(例如，具有汽车、工业和太阳能转换应用)之后，人们用X射线单晶衍射分析对其结构进行了表征。这种层状材料由两个不同的晶位组成，其中(Mn，Cr)和(Al，Si)都是随机分布的。通过相稳定性的温度依赖关系，用粉末X射线衍射分析确定了所推导的结晶学参数，同时显示出高达873K的化学稳定性。考虑到突出的两个不同的结晶点，然后合成了具有两个客体元素的样品，每个客体元素在每个位置上，以改善热电性能。在Mn2.7Cr0.3Si4Al2−xInx中发现了固溶体，x从0到0.2变化。因此，对双取代样品进行了X射线衍射、电学和热学测试。本文描述并讨论了所获得的实验结果。
Following the recent discovery of the promising Mn2.7Cr0.3Si4Al2thermoelectric compound (having, e.g., automotive, industrial, and solar conversion applications), structural characterization by x-ray single-crystal diffraction analysis has been performed. This layered material is composed of two distinct crystallographic sites where both (Mn, Cr) and (Al, Si) are randomly distributed. The deduced crystallographic parameters were then confirmed by powder x-ray diffraction analysis through a temperature dependence of the phase stability, showing at the same time chemical stability up to 873 K. Taking into account the two distinct crystallographic sites highlighted, samples possessing two guest elements, one on each site, were then synthesized to improve the thermoelectric properties. A solid solution is found in the system Mn2.7Cr0.3Si4Al2−xInxwithxvarying from 0 to 0.2. Thus, double-substituted samples were studied by x-ray diffraction, electrical, and thermal measurements. The present paper describes and discusses the experimental results obtained.