journal article·2021-10-20

Strategy of Extra Zr Doping on the Enhancement of Thermoelectric Performance for TiZrxNiSn Synthesized by a Modified Solid-State Reaction

Jun-Liang Chen, Hengquan Yang, Chengyan Liu, Jisheng Liang, Lei Miao, Zhongwei Zhang, Pengfei Liu, Kenta Yoshida, Chen Chen, Qian Zhang, Qi Zhou, Yuntiao Liao, Ping Wang, Zhixia Li, Biaolin Peng

ACS Applied Materials & Interfaces· Volume 13· Issue 41
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Abstract

Half-Heusler alloys, which possess the advantages of high thermal stability, a large power factor, and good mechanical property, have been attracting increasing interest in mid-temperature thermoelectric applications. In this work, extra Zr-doped TiZrxNiSn samples were successfully prepared by a modified solid-state reaction followed by spark plasma sintering. It demonstrates that extra Zr doping could not only improve the power factor on account of an increase in the Seebeck coefficient but also suppress the lattice thermal conductivity originated from the strengthened phonon scattering by the superlattice nanodomains and the secondary nanoparticles. As a consequence, an increased power factor of 3.29 mW m–1 K–2 and a decreased lattice thermal conductivity of 1.74 W m–1 K–1 are achieved in TiZr0.015NiSn, leading to a peak ZT as high as 0.88 at 773 K and an average ZT value up to 0.62 in the temperature range of 373–773 K. This work gives guidance for optimizing the thermoelectric performance of TiNiSn-based alloys by modulating the microstructures on the secondary nanophases and superlattice nanodomains.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Heusler alloys: electronic and magnetic properties · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Chemistry and Chemical Engineering & School of Physical Science and Technology, Guangxi University, Nanning 530004, China

School of Physics and Electronic & Electrical Engineering, and Jiangsu Key Laboratory of Modern Measurement Technology and Intelligent Systems, Huaiyin Normal University, Huai’an 223300, China

Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, Guilin University of Electronic Technology, Guilin 541004, China

Department of Materials Science and Engineering, SIT Research Laboratories, Innovative Global Program, Faculty of Engineering, Shibaura Institute of Technology, Tokyo 135-8548, Japan

School of Physical Science and Technology, Guangxi University, Nanning 530004, China

International Research Center for Nuclear Materials Science, Institute for Material Research, Tohoku University, Oarai, Ibaraki 311-1313, Japan

School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China

School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China

Funding

Ministry of Science and Technology of the People's Republic of China · Natural Science Foundation of Guangxi Province · Japan Society for the Promotion of Science · National Natural Science Foundation of China

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