Journal of Inorganic Materials ›› 2023, Vol. 38 ›› Issue (6): 663-670.DOI: 10.15541/jim20220637

• RESEARCH ARTICLE • Previous Articles     Next Articles

Service Stability of Gd/Bi0.5Sb1.5Te3 Thermo-electro-magnetic Gradient Composites

WANG Bo1(), YU Jian1,2(), LI Cuncheng1,3, NIE Xiaolei1, ZHU Wanting1, WEI Ping1, ZHAO Wenyu1(), ZHANG Qingjie1   

  1. 1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
    2. School of Materials Science and Engineering, Jiujiang University, Jiujiang 332005, China
    3. School of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, China
  • Received:2022-10-28 Revised:2022-12-15 Published:2023-06-20 Online:2022-12-28
  • Contact: YU Jian, lecturer. E-mail:;
    ZHAO Wenyu, professor. E-mail:
  • About author:WANG Bo (1996-), male, Master candidate. E-mail:
  • Supported by:
    National Key Research and Development Program of China(2019YFA0704903);National Natural Science Foundation of China(91963207);National Natural Science Foundation of China(52130203);National Natural Science Foundation of China(11834012);National Natural Science Foundation of China(52201256);Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory(XHT2020-004)


Combining thermoelectric materials with magnetocaloric materials enables a potential new all-solid-state cooling technology based on coupling enhancement of thermoelectric cooling and magnetic cooling, which is highly expected to achieve a technological change from thermoelectric cooling to thermoelectromagnetic cooling. However, the stability of thermal-electro-magnetic composites in service environment is still unknown. Herein, a series of Gd/BST thermo-electro-magnetic gradient composites were prepared by combining Bi0.5Sb1.5Te3 (BST) thermoelectric material and Gd magnetocaloric material via spark plasma sintering technology. Evolution of phase composition, microstructure, thermoelectric, and cooling performance of the gradient composites during the 12 d aging process at 338 K and 80% relative humidity(RH) were systematically studied. The results show that the phase composition and microstructure of Gd/BST thermal-electro-magnetic gradient composites have excellent service stability. The chemical composition and average thickness (~4.5 μm) of Gd-Te diffusion layer at Gd/BST heterogeneous interface doesn’t exhibit obvious change during the aging process. The test of thermoelectric and cooling performance along different Gd concentration gradient indicates that ZT of the materials negligibly changed before and after aging treatment, and the cooling temperature difference of the single-leg device is stable at about 6.5 K under the threshold current of 2.5 A. These results show that thermoelectric and cooling performance of the Gd/BST gradient composites have excellent service stability.

Key words: thermo-electro-magnetic gradient composites, thermoelectric performance, cooling performance, service stability

CLC Number: