材料科学
磁制冷
制冷
热电效应
复合材料
固态
工程物理
机械工程
热力学
磁场
磁化
量子力学
物理
工程类
作者
Peilin Miao,Lei Sheng,Longli Wang,Jiachen Zhu,Rongcheng Li,Guodong Li,Xinfeng Tang,Gangjian Tan
标识
DOI:10.1021/acsami.4c20755
摘要
Materials with both high thermoelectric (TE) performance and excellent magnetocaloric (MC) properties near room temperature are of great importance for all-solid-state TE/MC hybrid refrigeration. A combination of such two critical characteristics, however, is hardly attainable in single phase compounds. Herein we report a composite material that comprises Bi-Sb-Te thermoelectric and Ni-Mn-In magnetocaloric components as an innovative thermoelectromagnetic material with dual functionalities. The diffusion mechanism between the two components during solidification is well studied by experimental electron probe microanalyzer tests and theoretical density functional theory calculations. By rationalizing the sintering parameters, the interdiffusion of the two components in the composite material is significantly mitigated. As a consequence, Bi0.4Sb1.6Te3/15 wt % Ni50Mn35In15 composite material demonstrates a high thermoelectric figure of merit (ZT = 0.66) together with a large magnetic entropy change (ΔSmax = 3.08 J kg-1 K-1 under a magnetic field of 5 T), both achieved around 300 K. This study suggests that thermoelectromagnetic composite material holds a great promise for all-solid-state TE/MC hybrid cooling.
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