Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (7): 717-723.DOI: 10.15541/jim20210610

Special Issue: 【结构材料】高熵陶瓷 【能源环境】热电材料

• RESEARCH ARTICLE • Previous Articles     Next Articles

Inhibition of Lattice Thermal Conductivity of ZrNiSn-based Half-Heusler Thermoelectric Materials by Entropy Adjustment

WANG Pengjiang1(), KANG Huijun1(), YANG Xiong1, LIU Ying2, CHENG Cheng1, WANG Tongmin1   

  1. 1. Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China
    2. Key Laboratory of Material Modification by Laser, Ion and Electron Beams, Ministry of Education, Dalian University of Technology, Dalian 116024, China
  • Received:2021-10-05 Revised:2021-11-28 Published:2022-07-20 Online:2021-12-02
  • Contact: KANG Huijun, professor. E-mail:
  • About author:WANG Pengjiang (1996-), male, Master candidate. E-mail:
  • Supported by:
    National Natural Science Foundation of China(51971052);National Natural Science Foundation of China(51774065);Liaoning Revitalization Talents Program(XLYC2007183);Liaoning Revitalization Talents Program(XLYC1808005);Innovation Foundation of Science and Technology of Dalian(2020JJ25CY002);Innovation Foundation of Science and Technology of Dalian(2020JJ26GX045)


The thermoelectric properties of ZrNiSn-based half-Heusler materials were hindered due to their high thermal conductivity. In order to reduce the lattice thermal conductivity, the high-entropy alloys ZrNiSn and Zr0.5Hf0.5Ni1-xPtxSn (x=0, 0.1, 0.15, 0.2, 0.25, 0.3) were prepared by levitation melting and spark plasma sintering. Configurational entropy of the alloys was manipulated by Hf substitution for Zr and Pt substitution for Ni. Effects of configuration entropy on the thermoelectric properties were investigated. The reslults showed that the minimum sum of lattice thermal conductivity and bipolar thermal conductivity (κl+κb) at 673 K for Zr0.5Hf0.5Ni0.85Pt0.15Sn was optimized at 2.1 W·m-1·K-1, which was significantly reduced by about 58% when compared with ZrNiSn. This finding provides an effective strategy for reducing lattice thermal conductivity of ZrNiSn-based alloy to offer great potential for further improvement of thermoelectrics.

Key words: high entropy, half-Heusler alloy, thermoelectric material, lattice thermal conductivity

CLC Number: