arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2202.09273cond-mat.mtrl-sci
收藏

超快速高效微波辐射法合成单相等立方辉石(CuFe2S3)的结构研究及热电性能评价

Structural study and evaluation of thermoelectric properties of single-phase isocubanite (CuFe2S3) synthesized via an ultra-fast efficient microwave radiation technique

Tristan Barbier, Bhuvanesh Srinivasan, David Berthebaud, Volker Eyert, Raymond Frésard, Rodolphe Macaigne, Sylvain Marinel, Oleg I. Lebedev, Emmanuel Guilmeau, Antoine Maignan

摘要:

目前最先进的热电材料通常由昂贵、稀缺且有毒的元素组成。在这方面,铜基硫化物化合物已成为可行的替代品。本文首次报道了采用机械合金化与微波辅助合成相结合的方法成功合成了单相立方相CuFe 2S 3。通过这种超快的非平衡过程合成的异立方辉石相在673 K时具有最大的热电优值zTmax ~ 0.14。除了热电性能外,还详细研究了基于X射线衍射数据和第一性原理计算的有关isocubanite结构的见解。这证实了合成的isocubanite中的Cu-Fe阳离子以固有的无序方式占据立方结构的4d位。

英文摘要:

The current state-of-the-art thermoelectric materials are generally composed of expensive, scarce, and toxic elements. In this respect, copper-based sulfide compounds have emerged as viable alternatives. Herein, we report for the first time the successful synthesis of single-phase cubic isocubanite CuFe2S3 using mechanical-alloying combined with microwave-assisted synthesis. The isocubanite phase synthesized via this ultra-fast out-of-equilibrium process exhibits a maximum thermoelectric figure of merit, zTmax ~ 0.14 at 673 K. Besides the thermoelectric properties, insights about the structure of isocubanite, based on the refinement of X-ray diffraction data and first principles calculations, are also investigated in detail. It confirms that the Cu-Fe cations in synthetic isocubanite overwhelmingly occupy the 4d sites of the cubic structure in an inherently disordered fashion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑