Heavy elemental compound addition enhancing thermoelectric performance of Chromium Silicide synthesized by Spark plasma sintering

IF 2.4 4区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Current Applied Physics Pub Date : 2024-05-11 DOI:10.1016/j.cap.2024.05.009

Manju Yadav , Naval Kishor Upadhyay , Kishor Kumar Johari , Radhey Shyam , Sanjay R. Dhakate , Bhasker Gahtori , Saravanan Muthiah

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Abstract

Silicide-based materials drive great potential in developing mid-temperature range thermoelectric generators (TEGs) applications. However, realizing the efficient and stable silicide materials is still a constraint for its real potential device applications. Chromium silicide will likely become p-type thermoelectric materials in this direction for thermoelectric power generation applications. However, high thermal conductivity values impede the figure-of-merit (zT). The present work adopts the chromium silicide, adding different weight percentages of well-known ZrCoSbSn compounds employing the compaction spark plasma sintering (SPS) technique. By adopting these combinations, the thermal conductivity is significantly reduced by enhanced scattering of heat-carrying phonons by multiple interfaces. Also, the maximum power factor value of ≃ 2.1 × 10⁻³ W/mK² is achieved by employing a CrSi₂ -ZrCoSbSn compound addition. The enhanced figure-of-merit value (zT) ≃ 0.26 is realized in the temperature at 623 K for the CrSi₂-5wt% ZrCoSbSn compound material.

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添加重元素化合物提高火花等离子烧结法合成的硅化铬的热电性能

硅化物基材料在开发中温范围热电发电机（TEG）应用方面具有巨大潜力。然而，实现高效稳定的硅化物材料仍是其真正潜在设备应用的一个制约因素。在这个方向上，铬硅化物将有可能成为热电发电应用中的 p 型热电材料。然而，高热导率值阻碍了其性能系数（zT）。本研究采用火花等离子烧结（SPS）技术，在铬硅化物中加入不同重量百分比的知名 ZrCoSbSn 化合物。通过采用这些组合，增强了多个界面对载热声子的散射，从而显著降低了热导率。此外，通过添加 CrSi2 -ZrCoSbSn 化合物，功率因数的最大值达到了 ≃ 2.1 × 10-3 W/mK2。CrSi2-5wt% ZrCoSbSn 化合物材料在 623 K 温度下的功率因数值 (zT) ≃ 0.26。

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来源期刊

Current Applied Physics 物理-材料科学：综合

CiteScore

4.80

自引率

0.00%

发文量

213

审稿时长

33 days

期刊介绍： Current Applied Physics (Curr. Appl. Phys.) is a monthly published international journal covering all the fields of applied science investigating the physics of the advanced materials for future applications. Other areas covered: Experimental and theoretical aspects of advanced materials and devices dealing with synthesis or structural chemistry, physical and electronic properties, photonics, engineering applications, and uniquely pertinent measurement or analytical techniques. Current Applied Physics, published since 2001, covers physics, chemistry and materials science, including bio-materials, with their engineering aspects. It is a truly interdisciplinary journal opening a forum for scientists of all related fields, a unique point of the journal discriminating it from other worldwide and/or Pacific Rim applied physics journals. Regular research papers, letters and review articles with contents meeting the scope of the journal will be considered for publication after peer review. The Journal is owned by the Korean Physical Society.